10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2021

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from         to        

Commission File No. 001-33666

Archrock, Inc.

(Exact name of registrant as specified in its charter)

Delaware	74-3204509
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

9807 Katy Freeway, Suite 100, Houston, Texas 77024

(Address of principal executive offices, zip code)

(281) 836-8000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol	Name of exchange on which registered
Common stock, $0.01 par value per share	AROC	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☒	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

Number of shares of the common stock of the registrant outstanding as of July 23, 2021: 154,041,024 shares.

TABLE OF CONTENTS

	Page
Glossary	3
Forward-Looking Statements	4
Part I. Financial Information
Item 1. Financial Statements (unaudited)	5
Condensed Consolidated Balance Sheets	5
Condensed Consolidated Statements of Operations	6
Condensed Consolidated Statements of Comprehensive Income (Loss)	7
Condensed Consolidated Statements of Equity	8
Condensed Consolidated Statements of Cash Flows	10
Notes to Condensed Consolidated Financial Statements	11
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	29
Item 3. Quantitative and Qualitative Disclosures About Market Risk	39
Item 4. Controls and Procedures	39
Part II. Other Information
Item 1. Legal Proceedings	40
Item 1A. Risk Factors	40
Item 2. Purchases of Equity Securities by Issuer and Affiliated Purchasers	40
Item 3. Defaults Upon Senior Securities	40
Item 4. Mine Safety Disclosures	40
Item 5. Other Information	40
Item 6. Exhibits	41
Signatures	42

2

GLOSSARY

The following terms and abbreviations appearing in the text of this report have the meanings indicated below.

2020 Form 10-K	Annual Report on Form 10-K for the year ended December 31, 2020
2022 Notes	$350.0 million of 6.00% senior notes due October 2022, issued in April 2014
2027 Notes	$500.0 million of 6.875% senior notes due April 2027, issued in March 2019
2028 Notes	$800.0 million of 6.25% senior notes due April 2028, $500.0 million of which was issued in December 2019, $300.0 million of which was issued in December 2020
Amendment No. 3	Amendment No. 3 to Credit Agreement, dated February 22, 2021, which amended that Credit Agreement, dated as of March 30, 2017, which governs the Credit Facility
Archrock, our, we, us	Archrock, Inc., individually and together with its wholly-owned subsidiaries
ASU 2016-13	Accounting Standards Update No. 2016-13—Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments
ASU 2020-04	Accounting Standards Update No. 2020-04—Reference Rate Reform (Topic 848)—Facilitation of the Effects of Reference Rate Reform on Financial Reporting
ATM Agreement	Equity Distribution Agreement, dated February 23, 2021, entered into with Wells Fargo Securities, LLC and BofA Securities, Inc., as sales agents, relating to the at-the-market offer and sale of shares of our common stock from time to time
COVID-19	Coronavirus disease 2019
Credit Facility	$750.0 million asset-based revolving credit facility due November 2024, as governed by Amendment No. 3 to Credit Agreement, dated February 22, 2021, which amended that Credit Agreement, dated as of March 30, 2017
EBITDA	Earnings before interest, taxes, depreciation and amortization
Elite Acquisition	Transaction completed on August 1, 2019 whereby we acquired from Elite Compression Services, LLC substantially all of its assets and certain liabilities
ERP	Enterprise Resource Planning
ESPP	Employee Stock Purchase Plan
Exchange Act	Securities Exchange Act of 1934, as amended
February 2021 Disposition	Sale completed in February 2021 of certain contract operations customer service agreements, compressors and other assets
Financial Statements	Condensed consolidated financial statements included in Part I Item 1 of this Quarterly Report on Form 10-Q
GAAP	U.S. generally accepted accounting principles
Hilcorp	Hilcorp Energy Company
JDH Capital	JDH Capital Holdings, L.P.
July 2020 Disposition	Sale completed in July 2020 of the turbocharger business included within our aftermarket services segment
LIBOR	London Interbank Offered Rate
March 2020 Disposition	Sale completed in March 2020 of certain contract operations customer service agreements, compressors and other assets
OTC	Over-the-counter, as related to aftermarket services parts and components
ROU	Right-of-use, as related to the lease model under Accounting Standards Codification Topic 842 Leases
SEC	U.S. Securities and Exchange Commission
SG&A	Selling, general and administrative
Spin-off	Spin-off completed in November 2015 of our international contract operations, international aftermarket services and global fabrication businesses into a standalone public company operating as Exterran Corporation
U.S.	United States of America

3

FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains “forward-looking statements” intended to qualify for the safe harbors from liability established by the Private Securities Litigation Reform Act of 1995. All statements other than statements of historical fact contained in this Quarterly Report on Form 10-Q are forward-looking statements within the meaning of Section 21E of the Exchange Act, including, without limitation, statements regarding the effects of the COVID-19 pandemic on our business, operations, customers and financial condition; our business growth strategy and projected costs; future financial position; the sufficiency of available cash flows to fund continuing operations and pay dividends; the expected amount of our capital expenditures; anticipated cost savings; future revenue, gross margin and other financial or operational measures related to our business; the future value of our equipment; and plans and objectives of our management for our future operations. You can identify many of these statements by words such as “believe,” “expect,” “intend,” “project,” “anticipate,” “estimate,” “will continue” or similar words or the negative thereof.

Such forward-looking statements are subject to various risks and uncertainties that could cause actual results to differ materially from those anticipated as of the date of this Quarterly Report on Form 10-Q. Although we believe that the expectations reflected in these forward-looking statements are based on reasonable assumptions, no assurance can be given that these expectations will prove to be correct. Known material factors that could cause our actual results to differ materially from the expectations reflected in these forward-looking statements include the risk factors described in our 2020 Form 10-K and those set forth from time to time in our filings with the SEC, which are available through our website at www.archrock.com and through the SEC’s website at www.sec.gov.

All forward-looking statements included in this Quarterly Report on Form 10-Q are based on information available to us on the date of this Quarterly Report on Form 10-Q. Except as required by law, we undertake no obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. All subsequent written and oral forward-looking statements attributable to us or persons acting on our behalf are expressly qualified in their entirety by the cautionary statements contained throughout this Quarterly Report on Form 10-Q.

4

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

ARCHROCK, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except par value and share amounts)

(unaudited)

	June 30, 2021		December 31, 2020
Assets
Current assets:
Cash and cash equivalents	$	3,312	$	1,097
Accounts receivable, trade, net of allowance of $2,731 and $3,370, respectively		106,393		104,425
Inventory		65,885		63,670
Other current assets		12,265		12,819
Total current assets		187,855		182,011
Property, plant and equipment, net		2,322,400		2,389,674
Operating lease ROU assets		18,404		19,236
Intangible assets, net		54,684		61,531
Contract costs, net		24,661		29,216
Deferred tax assets		51,294		56,934
Other assets		25,936		30,084
Noncurrent assets associated with discontinued operations		10,424		11,036
Total assets	$	2,695,658	$	2,779,722
Liabilities and Equity
Current liabilities:
Accounts payable, trade	$	45,096	$	30,819
Accrued liabilities		77,376		76,993
Deferred revenue		3,078		3,880
Total current liabilities		125,550		111,692
Long-term debt		1,612,490		1,688,867
Operating lease liabilities		16,446		16,925
Deferred tax liabilities		761		725
Other liabilities		18,722		18,088
Noncurrent liabilities associated with discontinued operations		7,868		7,868
Total liabilities		1,781,837		1,844,165
Commitments and contingencies (Note 20)
Equity:
Preferred stock: $0.01 par value per share, 50,000,000 shares authorized, zero issued		—		—
Common stock: $0.01 par value per share, 250,000,000 shares authorized, 161,339,554 and 160,014,960 shares issued, respectively		1,613		1,600
Additional paid-in capital		3,434,224		3,424,624
Accumulated other comprehensive loss		(3,044)		(5,006)
Accumulated deficit		(2,433,553)		(2,401,988)
Treasury stock: 7,278,449 and 7,052,769 common shares, at cost, respectively		(85,419)		(83,673)
Total equity		913,821		935,557
Total liabilities and equity	$	2,695,658	$	2,779,722

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

5

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share amounts)

(unaudited)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Revenue:
Contract operations	$	163,865	$	187,949	$	329,899	$	394,923
Aftermarket services		31,750		32,367		61,147		75,090
Total revenue		195,615		220,316		391,046		470,013
Cost of sales (excluding depreciation and amortization):
Contract operations		61,387		63,390		122,752		142,041
Aftermarket services		27,490		28,686		53,273		63,677
Total cost of sales (excluding depreciation and amortization)		88,877		92,076		176,025		205,718
Selling, general and administrative		26,077		28,745		51,161		59,371
Depreciation and amortization		44,193		48,849		89,905		98,671
Long-lived and other asset impairment		2,960		55,210		10,033		61,405
Goodwill impairment		—		—		—		99,830
Restructuring charges		743		2,408		1,640		4,136
Interest expense		25,958		25,778		57,203		55,443
Debt extinguishment loss		—		3,971		—		3,971
(Gain) loss on sale of assets, net		(3,124)		2,189		(14,156)		(1,927)
Other income, net		(82)		(438)		(1,971)		(993)
Income (loss) before income taxes		10,013		(38,472)		21,206		(115,612)
Provision for (benefit from) income taxes		1,261		(8,091)		8,285		(24,044)
Net income (loss)	$	8,752	$	(30,381)	$	12,921	$	(91,568)
Basic and diluted net income (loss) per common share	$	0.06	$	(0.20)	$	0.08	$	(0.61)
Weighted average common shares outstanding:
Basic		152,033		150,743		151,537		150,628
Diluted		152,203		150,743		151,699		150,628

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

6

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(in thousands)

(unaudited)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2021		2020		2021		2020
Net income (loss)	$	8,752	$	(30,381)	$	12,921	$	(91,568)
Other comprehensive income (loss), net of tax:
Interest rate swap gain (loss), net of reclassifications to earnings		966		265		1,962		(5,521)
Total other comprehensive income (loss), net of tax		966		265		1,962		(5,521)
Comprehensive income (loss)	$	9,718	$	(30,116)	$	14,883	$	(97,089)

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

7

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(in thousands, except share and per share amounts)

(unaudited)

						Accumulated
	Common			Additional		Other				Treasury
	Stock			Paid-in		Comprehensive		Accumulated		Stock
	Amount		Shares	Capital		Loss		Deficit		Amount		Shares	Total
Balance at March 31, 2020	$	1,598	159,756,498	$	3,415,784	$	(7,173)	$	(2,328,069)	$	(82,668)	(6,830,407)	$	999,472
Treasury stock purchased											(35)	(5,563)		(35)
Cash dividends ($0.145 per common share)									(22,176)					(22,176)
Shares issued under ESPP			53,838		165									165
Stock-based compensation, net of forfeitures					2,885							(25,014)		2,885
Contribution from Exterran Corporation					678									678
Comprehensive loss
Net loss									(30,381)					(30,381)
Interest rate swap gain, net of reclassifications to earnings							265							265
Balance at June 30, 2020	$	1,598	159,810,336	$	3,419,512	$	(6,908)	$	(2,380,626)	$	(82,703)	(6,860,984)	$	950,873
Balance at March 31, 2021	$	1,613	161,323,492	$	3,430,910	$	(4,010)	$	(2,419,974)	$	(85,415)	(7,263,173)	$	923,124
Treasury stock purchased											(4)	(383)		(4)
Cash dividends ($0.145 per common share)									(22,331)					(22,331)
Shares issued under ESPP			16,062		136									136
Stock-based compensation, net of forfeitures					3,178							(14,893)		3,178
Comprehensive income
Net income									8,752					8,752
Interest rate swap gain, net of reclassifications to earnings							966							966
Balance at June 30, 2021	$	1,613	161,339,554	$	3,434,224	$	(3,044)	$	(2,433,553)	$	(85,419)	(7,278,449)	$	913,821

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

8

						Accumulated
	Common			Additional		Other				Treasury
	Stock			Paid-in		Comprehensive		Accumulated		Stock
	Amount		Shares	Capital		Loss		Deficit		Amount		Shares	Total
Balance at December 31, 2019	$	1,587	158,636,918	$	3,412,509	$	(1,387)	$	(2,244,877)	$	(81,869)	(6,702,602)	$	1,085,963
Treasury stock purchased											(834)	(96,157)		(834)
Cash dividends ($0.290 per common share)									(44,347)					(44,347)
Shares issued under ESPP		1	110,255		366									367
Stock-based compensation, net of forfeitures		10	1,063,163		5,959							(62,225)		5,969
Contribution from Exterran Corporation					678									678
Impact of ASU 2016-13 adoption									166					166
Comprehensive loss
Net loss									(91,568)					(91,568)
Interest rate swap loss, net of reclassifications to earnings							(5,521)							(5,521)
Balance at June 30, 2020	$	1,598	159,810,336	$	3,419,512	$	(6,908)	$	(2,380,626)	$	(82,703)	(6,860,984)	$	950,873
Balance at December 31, 2020	$	1,600	160,014,960	$	3,424,624	$	(5,006)	$	(2,401,988)	$	(83,673)	(7,052,769)	$	935,557
Treasury stock purchased											(1,746)	(184,776)		(1,746)
Cash dividends ($0.290 per common share)									(44,486)					(44,486)
Shares issued under ESPP			44,116		371									371
Stock-based compensation, net of forfeitures		9	923,330		5,832							(40,904)		5,841
Net proceeds from issuance of common stock		4	357,148		3,397									3,401
Comprehensive income
Net income									12,921					12,921
Interest rate swap gain, net of reclassifications to earnings							1,962							1,962
Balance at June 30, 2021	$	1,613	161,339,554	$	3,434,224	$	(3,044)	$	(2,433,553)	$	(85,419)	(7,278,449)	$	913,821

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

9

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(in thousands)

(unaudited)

	Six Months Ended
	June 30,
	2021		2020
Cash flows from operating activities:
Net income (loss)	$	12,921	$	(91,568)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization		89,905		98,671
Long-lived and other asset impairment		10,033		61,405
Goodwill impairment		—		99,830
Inventory write-downs		511		695
Amortization of operating lease ROU assets		1,891		1,627
Amortization of deferred financing costs		7,551		2,856
Amortization of debt discount		—		187
Amortization of debt premium		(1,003)		—
Debt extinguishment loss		—		3,971
Interest rate swaps		2,169		928
Stock-based compensation expense		5,841		5,778
Non-cash restructuring charges		—		162
Provision for (benefit from) credit losses		(215)		2,282
(Gain) loss on sale of assets, net		(8,161)		1,245
Gain on sale of business		(5,995)		(3,172)
Deferred income tax provision (benefit)		7,995		(24,117)
Amortization of contract costs		10,752		13,656
Deferred revenue recognized in earnings		(5,048)		(12,762)
Change in assets and liabilities:
Accounts receivable, trade		(2,661)		17,569
Inventory		(3,569)		2,615
Other assets		(244)		(4,268)
Contract costs, net		(6,467)		(8,129)
Accounts payable and other liabilities		6,358		(10,829)
Deferred revenue		4,068		8,253
Other		(15)		189
Net cash provided by operating activities		126,617		167,074
Cash flows from investing activities:
Capital expenditures		(38,749)		(113,289)
Proceeds from sale of business		18,795		24,179
Proceeds from sale of property, plant and equipment and other assets		18,178		5,071
Proceeds from insurance and other settlements		910		1,351
Net cash used in investing activities		(866)		(82,688)
Cash flows from financing activities:
Borrowings of long-term debt		343,251		722,500
Repayments of long-term debt		(419,751)		(762,500)
Payments for debt issuance costs		(2,407)		(943)
Payments for settlement of interest rate swaps that include financing elements		(2,169)		(787)
Dividends paid to stockholders		(44,486)		(44,347)
Net proceeds from issuance of common stock		3,401		—
Proceeds from stock issued under ESPP		371		367
Purchases of treasury stock		(1,746)		(834)
Contribution from Exterran Corporation		—		678
Net cash used in financing activities		(123,536)		(85,866)
Net increase (decrease) in cash and cash equivalents		2,215		(1,480)
Cash and cash equivalents, beginning of period		1,097		3,685
Cash and cash equivalents, end of period	$	3,312	$	2,205

The accompanying notes are an integral part of these unaudited condensed consolidated financial statements.

10

ARCHROCK, INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. Description of Business and Basis of Presentation

We are an energy infrastructure company with a pure-play focus on midstream natural gas compression. We are the leading provider of natural gas compression services to customers in the oil and natural gas industry throughout the U.S. and a leading supplier of aftermarket services to customers that own compression equipment in the U.S. We operate in two business segments: contract operations and aftermarket services. Our predominant segment, contract operations, primarily includes designing, sourcing, owning, installing, operating, servicing, repairing and maintaining our owned fleet of natural gas compression equipment to provide natural gas compression services to our customers. In our aftermarket services business, we sell parts and components and provide operations, maintenance, overhaul and reconfiguration services to customers who own compression equipment.

The accompanying unaudited condensed consolidated financial statements included herein have been prepared in accordance with GAAP and the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP are not required in these interim financial statements and have been condensed or omitted. Management believes that the information furnished reflects all normal recurring adjustments necessary to fairly present our consolidated financial position, results of operations and cash flows for the periods indicated. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements presented in our 2020 Form 10-K, which contains a more comprehensive summary of our accounting policies. The interim results reported herein are not necessarily indicative of results for a full year. Certain prior year amounts have been reclassified to conform to the current year presentation.

2. Recent Accounting Developments

Accounting Standards Updates Implemented

Reference Rate Reform

On June 10, 2021, we prospectively adopted ASU 2020-04, which provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued as a result of reference rate reform. ASU 2020-04 is effective for all entities as of March 12, 2020 through December 31, 2022. Entities may elect to apply the amendments for contract modifications as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020. On June 10, 2021, we amended one of our interest rate swap agreements and determined that the modifications meet the criteria for the optional expedients and exceptions, which allow us to forego de-designation of the hedging relationship and to subsequently assess effectiveness on a qualitative basis. The adoption of ASU 2020-04 did not have a material impact on our consolidated financial statements. In the first quarter, we evaluated Amendment No. 3 to our Credit Facility and determined that ASU 2020-04 was not applicable. We will continue to assess any modifications to our interest rate swap and Credit Facility agreements during the effective period of this update and will apply the amendments as applicable.

3. Business Transactions

February 2021 Disposition

On February 10, 2021, we completed the sale of certain contract operations customer service agreements and approximately 300 compressors, comprising approximately 40,000 horsepower, used to provide compression services under those agreements as well as other assets used to support the operations. We allocated customer-related and contract-based intangible assets based on a ratio of the horsepower sold relative to the total horsepower of the asset group. We recorded a gain on the sale of $6.0 million in (gain) loss on sale of assets, net in our condensed consolidated statements of operations during the six months ended June 30, 2021.

11

July 2020 Disposition

In July 2020, we completed the sale of the turbocharger business included within our aftermarket services segment. In connection with the sale, we entered into a supply agreement to purchase a minimum amount of turbocharger goods and services over a two-year term. In addition to cash of $9.5 million received upon closing, an additional $3.0 million was received on the first anniversary of the closing date in July 2021, and $3.5 million is being received through the purchase of turbocharger goods and services under the supply agreement. We received cash proceeds of $1.5 million and $0.7 million under the supply agreement during the six months ended June 30, 2021 and December 31, 2020, respectively.

March 2020 Disposition

In March 2020, we completed the sale of certain contract operations customer service agreements and approximately 200 compressors, comprising approximately 35,000 horsepower, used to provide compression services under those agreements as well as other assets used to support the operations. We allocated customer-related and contract-based intangible assets and goodwill based on a ratio of the horsepower sold relative to the total horsepower of the asset group. We recognized a gain on the sale of $3.2 million in (gain) loss on sale of assets, net in our condensed consolidated statements of operations during the six months ended June 30, 2020.

4. Discontinued Operations

In 2015 we completed the Spin-off. In order to effect the Spin-off and govern our relationship with Exterran Corporation after the Spin-off, we entered into several agreements with Exterran Corporation, including a tax matters agreement, which governs the respective rights, responsibilities and obligations of Exterran Corporation and us with respect to certain tax matters.

As of each of June 30, 2021 and December 31, 2020, we had $7.9 million of unrecognized tax benefits (including interest and penalties) related to Exterran Corporation operations prior to the Spin-off recorded to noncurrent liabilities associated with discontinued operations in our condensed consolidated balance sheets. We had an offsetting indemnification asset of $7.9 million related to these unrecognized tax benefits recorded to noncurrent assets associated with discontinued operations as of each of June 30, 2021 and December 31, 2020.

The following table presents the balance sheets for our discontinued operations:

(in thousands)	June 30, 2021		December 31, 2020
Other assets	$	7,868	$	7,868
Deferred tax assets		2,556		3,168
Total assets associated with discontinued operations	$	10,424	$	11,036
Deferred tax liabilities	$	7,868	$	7,868
Total liabilities associated with discontinued operations	$	7,868	$	7,868

5. Inventory

(in thousands)	June 30, 2021		December 31, 2020
Parts and supplies	$	58,331	$	57,433
Work in progress		7,554		6,237
Inventory	$	65,885	$	63,670

12

6. Property, Plant and Equipment, net

(in thousands)	June 30, 2021		December 31, 2020
Compression equipment, facilities and other fleet assets	$	3,384,406	$	3,439,432
Land and buildings		44,721		45,167
Transportation and shop equipment		101,115		106,868
Computer hardware and software		84,680		84,680
Other		21,429		14,457
Property, plant and equipment		3,636,351		3,690,604
Accumulated depreciation		(1,313,951)		(1,300,930)
Property, plant and equipment, net	$	2,322,400	$	2,389,674

7. Goodwill

Our goodwill was recognized in connection with the Elite Acquisition and represents the excess of consideration transferred over the fair value of the assets and liabilities acquired. All of the goodwill was allocated to our contract operations reporting unit. We review the carrying amount of our goodwill in the fourth quarter of every year, or whenever indicators of potential impairment exist, to determine if the carrying amount of our contract operations reporting unit exceeds its fair value, including the goodwill. Beginning in the first quarter of 2020, the COVID-19 pandemic caused a significant deterioration in global macroeconomic conditions, including a collapse in the demand for oil coupled with an oversupply of oil, which commenced substantial spending cuts by our customers and a decline in production. This global response to the pandemic significantly impacted our market capitalization and estimates of future revenues and cash flows, which triggered the need to perform a quantitative test of the fair value of our contract operations reporting unit as of March 31, 2020. The quantitative test determined that the carrying amount of our contract operations reporting unit exceeded its fair value and we recorded a goodwill impairment loss of $99.8 million during the first quarter of 2020.

Determining the fair value of a reporting unit is judgmental in nature and involves the use of significant estimates and assumptions, which have a significant impact on the fair value determined. We determined the fair value of our reporting unit using an equal weighting of both the expected present value of future cash flows and a market approach. The present value of future cash flows was estimated using our most recent forecast and the weighted average cost of capital. The market approach uses a market multiple on the earnings before interest expense, provision for income taxes and depreciation and amortization expense of comparable peer companies. Significant estimates for our reporting unit included in our impairment analysis were our cash flow forecasts, our estimate of the market’s weighted average cost of capital and market multiples.

8. Hosting Arrangements

In the fourth quarter of 2018 we began a process and technology transformation project that will, among other things, upgrade or replace our existing ERP, supply chain and inventory management systems and expand the remote monitoring capabilities of our compression fleet. Included in this project are hosting arrangements that are service contracts related to the cloud migration of our ERP system and cloud services for our new mobile workforce, telematics and inventory management tools.

As of June 30, 2021 and December 31, 2020, we had $9.8 million and $7.7 million, respectively, of capitalized implementation costs related to our hosting arrangements that are service contracts included in other assets in our condensed consolidated balance sheets. Accumulated amortization was $0.5 million and $0.3 million at June 30, 2021 and December 31, 2020, respectively. We recorded $0.1 million of amortization expense to SG&A in our condensed consolidated statements of operations during each of the three months ended June 30, 2021 and 2020, and $0.2 million and $0.1 million during the six months ended June 30, 2021 and 2020, respectively.

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9. Long-Term Debt

(in thousands)	June 30, 2021		December 31, 2020
Credit Facility	$	316,500	$	393,000
2028 Notes
Principal		800,000		800,000
Debt premium, net of amortization		13,539		14,541
Deferred financing costs, net of amortization		(11,192)		(11,766)
		802,347		802,775
2027 Notes
Principal		500,000		500,000
Deferred financing costs, net of amortization		(6,357)		(6,908)
		493,643		493,092
Long-term debt	$	1,612,490	$	1,688,867

Credit Facility

As of June 30, 2021, there were $12.5 million letters of credit outstanding under the Credit Facility and the applicable margin on borrowings outstanding was 2.4%. The weighted average annual interest rate on the outstanding balance under the Credit Facility, excluding the effect of interest rate swaps, was 2.5% and 2.7% at June 30, 2021 and December 31, 2020, respectively. We incurred $0.4 million in commitment fees on the daily unused amount of the Credit Facility during each of the three months ended June 30, 2021 and 2020 and $1.0 million and $1.1 million during the six months ended June 30, 2021 and 2020, respectively.

We must maintain certain consolidated financial ratios as defined in our Credit Facility agreement (see below). As of June 30, 2021, the ratio requirements did not constrain our undrawn capacity and as such, $421.0 million was available for additional borrowings. As of June 30, 2021, we were in compliance with all covenants under the Credit Facility agreement.

Amendment No. 3

On February 22, 2021, we amended our Credit Facility to, among other things:

● reduce the aggregate revolving commitment from $1.25 billion to $750.0 million, and

● adjust the maximum Senior Secured Debt to EBITDA and Total Debt to EBITDA ratios, as defined in the Credit Facility agreement, to the following:

Senior Secured Debt to EBITDA	3.00 to 1.0
Total Debt to EBITDA
Through fiscal year 2022	5.75 to 1.0
January 1, 2023 through September 30, 2023	5.50 to 1.0
Thereafter (1)	5.25 to 1.0

(1) Subject to a temporary increase to 5.50 to 1.0 for any quarter during which an acquisition satisfying certain thresholds is completed and for the two quarters immediately following such quarter.

We incurred $1.8 million in transaction costs related to Amendment No. 3, which were included in other assets in our condensed consolidated balance sheets and are being amortized over the remaining term of the Credit Facility. In addition, we wrote off $4.9 million of unamortized deferred financing costs as a result of the amendment, which was recorded to interest expense in our condensed consolidated statements of operations during the six months ended June 30, 2021.

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2022 Notes Redemption

In April 2020, the 2022 Notes were redeemed at 100% of their $350.0 million aggregate principal amount plus accrued and unpaid interest of $10.5 million with borrowings under the Credit Facility. A debt extinguishment loss of $4.0 million related to the redemption was recognized during the three and six months ended June 30, 2020.

10. Accumulated Other Comprehensive Loss

Components of comprehensive income (loss) are net income (loss) and all changes in equity during a period except those resulting from transactions with owners. Our accumulated other comprehensive income (loss) consists of changes in the fair value of our interest rate swap derivative instruments, net of tax, which are designated as cash flow hedges.

The following table presents the changes in accumulated other comprehensive loss of our derivative cash flow hedges, net of tax:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Beginning accumulated other comprehensive loss	$	(4,010)	$	(7,173)	$	(5,006)	$	(1,387)
Other comprehensive income (loss), net of tax:
Loss recognized in other comprehensive income (loss), net of tax benefit of $16, $155, $18 and $1,745, respectively		(63)		(583)		(71)		(6,566)
Loss reclassified from accumulated other comprehensive loss to interest expense, net of tax benefit of $273, $225, $540 and $277, respectively		1,029		848		2,033		1,045
Total other comprehensive income (loss)		966		265		1,962		(5,521)
Ending accumulated other comprehensive loss	$	(3,044)	$	(6,908)	$	(3,044)	$	(6,908)

See Note 17 (“Derivatives”) for further details on our interest rate swap derivative instruments.

11. Equity

At-the-Market Continuous Equity Offering Program

On February 23, 2021, we entered into the ATM Agreement, pursuant to which we may offer and sell shares of our common stock from time to time for an aggregate offering price of up to $50.0 million. We intend to use the net proceeds of these offerings, after deducting sales agent fees and offering expenses, for general corporate purposes. Offerings of common stock pursuant to the ATM Agreement will terminate upon the earlier of (i) the sale of all shares of common stock subject to the ATM Agreement or (ii) the termination of the ATM Agreement by us or by each of the sales agents. Any sales agent may also terminate the ATM Agreement but only with respect to itself.

During the six months ended June 30, 2021, we sold 357,148 shares of common stock for net proceeds of $3.4 million pursuant to the ATM Agreement.

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Cash Dividends

The following table summarizes our dividends declared and paid in each of the quarterly periods of 2021 and 2020:

	Declared Dividends		Dividends Paid
	per Common Share		(in thousands)
2021
Q2	$	0.145	$	22,331
Q1		0.145		22,155
2020
Q4	$	0.145	$	22,177
Q3		0.145		22,308
Q2		0.145		22,176
Q1		0.145		22,171

On July 28, 2021, our Board of Directors declared a quarterly dividend of $0.145 per share of common stock to be paid on August 16, 2021 to stockholders of record at the close of business on August 9, 2021.

12. Revenue from Contracts with Customers

The following table presents our revenue from contracts with customers by segment (see Note 22 (“Segments”)) and disaggregated by revenue source:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Contract operations:
0 ― 1,000 horsepower per unit	$	45,918	$	57,728	$	92,837	$	124,468
1,001 ― 1,500 horsepower per unit		66,852		78,026		135,316		162,878
Over 1,500 horsepower per unit		50,939		51,618		101,342		106,209
Other (1)		156		577		404		1,368
Total contract operations revenue (2)		163,865		187,949		329,899		394,923
Aftermarket services:
Services		17,008		19,081		33,900		44,531
OTC parts and components sales		14,742		13,286		27,247		30,559
Total aftermarket services revenue (3)		31,750		32,367		61,147		75,090
Total revenue	$	195,615	$	220,316	$	391,046	$	470,013

(1) Primarily relates to fees associated with owned non-compression equipment.

(2) Includes $1.4 million and $1.5 million for the three months ended June 30, 2021 and 2020, respectively, and $2.4 million and $3.1 million for the six months ended June 30, 2021 and 2020, respectively, related to billable maintenance on owned compressors that was recognized at a point in time. All other contract operations revenue is recognized over time.

(3) All services revenue within aftermarket services is recognized over time. All OTC parts and components sales revenue is recognized at a point in time.

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Performance Obligations

As of June 30, 2021, we had $286.6 million of remaining performance obligations related to our contract operations segment, which will be recognized through 2025 as follows:

(in thousands)	2021		2022		2023		2024		2025		Total
Remaining performance obligations	$	155,764	$	106,352	$	20,785	$	3,512	$	144	$	286,557

We do not disclose the aggregate transaction price for the remaining performance obligations for aftermarket services as there are no contracts with customers with an original contract term that is greater than one year.

Contract Assets and Liabilities

Contract Assets

As of June 30, 2021 and December 31, 2020, our receivables from contracts with customers, net of allowance for credit losses, were $96.0 million and $95.6 million, respectively.

Allowance for Credit Losses

Trade accounts receivable are due from companies of varying size engaged principally in oil and natural gas activities throughout the U.S. We review the financial condition of customers prior to extending credit and generally do not obtain collateral for trade receivables. Payment terms are on a short-term basis and in accordance with industry practice. We consider this credit risk to be limited due to these companies’ financial resources, the nature of the products and services we provide and the terms of our customer agreements.

Due to the short-term nature of our trade receivables, we consider the amortized cost to be the same as the carrying amount of the receivable, excluding the allowance for credit losses. We recognize an allowance for credit losses when a receivable is recorded, even when the risk of loss is remote. We utilize an aging schedule to determine our allowance for credit losses and measure expected credit losses on a collective (pool) basis when similar risk characteristics exist. We rely primarily on ratings assigned by external rating agencies and credit monitoring services to assess credit risk and aggregate customers first by low, medium or high risk asset pools, and then by delinquency status. We also consider the internal risk associated with geographic location and the services we provide to the customer when determining asset pools. If a customer does not share similar risk characteristics with other customers, we evaluate the customer’s outstanding trade receivables for expected credit losses on an individual basis. Trade receivables evaluated individually are not included in our collective assessment. Each reporting period, we reassess our customers’ risk profiles and determine the appropriate asset pool classification, or perform individual assessments of expected credit losses, based on the customers’ risk characteristics at the reporting date.

The contractual life of our trade receivables is primarily 30 days based on the payment terms specified in the contract. Contract operations services are generally billed monthly at the beginning of the month in which service is being provided. Aftermarket services billings typically occur when parts are delivered or service is completed. Loss rates are separately determined for each asset pool based on the length of time a trade receivable has been outstanding. We analyze two years of internal historical loss data, including the effects of prepayments, write-offs and subsequent recoveries, to determine our historical loss experience. Our historical loss information is a relevant data point for estimating credit losses, as the data closely aligns with trade receivables due from our customers. Ratings assigned by external rating agencies and credit monitoring services consider past performance and forecasts of future economic conditions in assessing credit risk. We routinely update our historical loss data to reflect our customers’ current risk profile, to ensure the historical data and loss rates are relevant to the pool of assets for which we are estimating expected credit losses.

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Our allowance for credit losses balance changed as follows during the six months ended June 30, 2021:

(in thousands)
Balance at December 31, 2020	$	3,370
Provision for (benefit from) credit losses		(215)
Write-offs charged against allowance		(424)
Balance at June 30, 2021	$	2,731

Contract Liabilities

Freight billings to customers for the transport of compression assets, customer-specified modifications of compression assets and milestone billings on aftermarket services often result in a contract liability. As of June 30, 2021 and December 31, 2020, our contract liabilities were $3.6 million and $4.6 million, respectively, which were included in deferred revenue and other liabilities in our condensed consolidated balance sheets. The decrease in the contract liability balance during the six months ended June 30, 2021 was primarily due to $5.0 million recognized as revenue during the period, partially offset by revenue deferral of $4.1 million, each primarily related to freight billings and milestone billings on aftermarket services.

13. Long-Lived and Other Asset Impairment

We review long-lived assets, including property, plant and equipment and identifiable intangibles that are being amortized, for impairment whenever events or changes in circumstances, including the removal of compressors from our active fleet, indicate that the carrying amount of an asset may not be recoverable.

In the first quarter of 2020, we determined that the impairment of our contract operations reporting unit’s goodwill was an indicator of potential impairment of the carrying amount of our long-lived assets, including our compressor fleet and associated customer and contract-based intangible assets. Accordingly, we performed a quantitative impairment test of our long-lived assets, by which we determined that they were not also impaired. No similar impairment has been indicated subsequent to the first quarter of 2020.

Compression Fleet

We periodically review the future deployment of our idle compression assets for units that are not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. Based on these reviews, we determine that certain idle compressors should be retired from the active fleet. The retirement of these units from the active fleet triggers a review of these assets for impairment and as a result of our review, we may record an asset impairment to reduce the book value of each unit to its estimated fair value. The fair value of each unit is estimated based on the expected net sale proceeds compared to other fleet units we recently sold, a review of other units recently offered for sale by third parties or the estimated component value of the equipment we plan to use.

In connection with our review of our idle compression assets, we evaluate for impairment idle units that were culled from our fleet in prior years and are available for sale. Based on that review, we may reduce the expected proceeds from disposition and record additional impairment to reduce the book value of each unit to its estimated fair value.

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The following table presents the results of our compression fleet impairment review as recorded to our contract operations segment:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(dollars in thousands)	2021		2020		2021		2020
Idle compressors retired from the active fleet		45		450		115		535
Horsepower of idle compressors retired from the active fleet		13,000		184,000		37,000		207,000
Impairment recorded on idle compressors retired from the active fleet	$	2,832	$	55,210	$	9,844	$	61,405

14. Restructuring Charges

During the first quarter of 2020, we completed restructuring activities to further streamline our organization and more fully align our teams to improve our customer service and profitability. We incurred severance costs of $1.7 million related to these activities during the first quarter of 2020. No additional costs will be incurred for this organizational restructuring.

In response to the decreased activity level of our customers that resulted from the COVID-19 pandemic beginning in the second quarter of 2020, we have incurred severance costs of $6.8 million to right-size our business. We do not expect to incur additional material severance costs under this restructuring plan.

During the third quarter of 2020, a plan to dispose of certain non-core properties was approved by management. We have incurred $1.5 million of restructuring costs as a result of our property disposals and do not expect to incur additional material property disposal costs under this restructuring plan.

The severance and property disposal costs incurred under the above restructuring plans were recorded to restructuring charges in our condensed consolidated statements of operations.

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The following table presents restructuring charges incurred by segment:

	Contract		Aftermarket
(in thousands)	Operations		Services		Other (1)		Total
Three months ended June 30, 2021
Pandemic restructuring	$	337	$	121	$	147	$	605
Property restructuring		—		—		7		7
Other restructuring		—		—		131		131
Total restructuring charges	$	337	$	121	$	285	$	743
Three months ended June 30, 2020
Pandemic restructuring	$	1,386	$	286	$	736	$	2,408
Six months ended June 30, 2021
Pandemic restructuring	$	616	$	145	$	732	$	1,493
Property restructuring		—		—		16		16
Other restructuring		—		—		131		131
Total restructuring charges	$	616	$	145	$	879	$	1,640
Six months ended June 30, 2020
Organizational restructuring	$	478	$	625	$	625	$	1,728
Pandemic restructuring		1,386		286		736		2,408
Total restructuring charges	$	1,864	$	911	$	1,361	$	4,136

(1) Represents expense incurred within our corporate function and not directly attributable to our segments.

The following table presents restructuring charges incurred by cost type:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Severance costs
Organizational restructuring	$	—	$	—	$	—	$	1,728
Pandemic restructuring		605		2,408		1,493		2,408
Total severance costs		605		2,408		1,493		4,136
Property disposal costs
Impairment loss		—		—		9		—
Other exit costs		7		—		7		—
Total property disposal costs		7		—		16		—
Other restructuring costs		131		—		131		—
Total restructuring charges	$	743	$	2,408	$	1,640	$	4,136

15. Income Taxes

Valuation Allowance

The amount of our deferred tax assets considered realizable could be adjusted if projections of future taxable income are reduced or objective negative evidence in the form of a three-year cumulative loss is present or both. Should we no longer have a level of sustained profitability, excluding nonrecurring charges, we will have to rely more on our future projections of taxable income to determine if we have an adequate source of taxable income for the realization of our deferred tax assets, namely net operating loss carryforwards and tax credit carryforwards. This may result in the need to record a valuation allowance against all or a portion of our deferred tax assets.

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Effective Tax Rate

The year-to-date effective tax rate for the six months ended June 30, 2021 differed significantly from our statutory rate primarily due to unrecognized tax benefits and the limitation on executive compensation.

Unrecognized Tax Benefits

As of June 30, 2021, we believe it is reasonably possible that $2.8 million of our unrecognized tax benefits, including penalties, interest and discontinued operations, will be reduced prior to June 30, 2022 due to the settlement of audits or the expiration of statutes of limitations or both. However, due to the uncertain and complex application of the tax regulations, it is possible that the ultimate resolution of these matters may result in liabilities that could materially differ from this estimate.

16. Earnings per Share

Basic net income (loss) per common share is computed using the two-class method, which is an earnings allocation formula that determines net income (loss) per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Under the two-class method, basic net income (loss) per common share is determined by dividing net income (loss), after deducting amounts allocated to participating securities, by the weighted average number of common shares outstanding for the period. Participating securities include unvested restricted stock and stock-settled restricted stock units that have nonforfeitable rights to receive dividends or dividend equivalents, whether paid or unpaid. During periods of net loss, only distributed earnings (dividends) are allocated to participating securities, as participating securities do not have a contractual obligation to participate in our undistributed losses.

Diluted net income (loss) per common share is computed using the weighted average number of shares outstanding adjusted for the incremental common stock equivalents attributed to outstanding options, performance-based restricted stock units and stock to be issued pursuant to our ESPP unless their effect would be anti-dilutive.

The following table shows the calculation for net income (loss) attributable to common stockholders, which is used in the calculation of basic and diluted net income (loss) per common share:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Net income (loss)	$	8,752	$	(30,381)	$	12,921	$	(91,568)
Less: Earnings attributable to participating securities		(285)		(321)		(454)		(643)
Net income (loss) attributable to common stockholders	$	8,467	$	(30,702)	$	12,467	$	(92,211)

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The following table shows the potential shares of common stock that were included in computing diluted net income (loss) per common share:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
(in thousands)	2021	2020	2021	2020
Weighted average common shares outstanding including participating securities	154,047	152,937	153,334	152,750
Less: Weighted average participating securities outstanding	(2,014)	(2,194)	(1,797)	(2,122)
Weighted average common shares outstanding used in basic net income (loss) per common share	152,033	150,743	151,537	150,628
Net dilutive potential common shares issuable:
On exercise of options and vesting of performance-based restricted stock units	169	—	159	—
On settlement of ESPP shares	1	—	3	—
Weighted average common shares outstanding used in diluted net income (loss) per common share	152,203	150,743	151,699	150,628

The following table shows the potential shares of common stock issuable that were excluded from computing diluted net income (loss) per common share as their inclusion would have been anti-dilutive:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
(in thousands)	2021	2020	2021	2020
On exercise of options where exercise price is greater than average market value for the period	22	95	33	111
On exercise of options and vesting of performance-based restricted stock units	—	57	—	57
On settlement of ESPP shares	—	22	—	25
Net dilutive potential common shares issuable	22	174	33	193

17. Derivatives

We are exposed to market risks associated with changes in the variable interest rate of our Credit Facility. We use derivative instruments to manage our exposure to fluctuations in this variable interest rate and thereby minimize the risks and costs associated with financial activities. We do not use derivative instruments for trading or other speculative purposes.

As of June 30, 2021, we had $300.0 million notional value of interest rate swaps outstanding, which expire in March 2022 and were entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates. The counterparties to these derivative agreements are major financial institutions. We monitor the credit quality of these financial institutions and do not expect nonperformance by any counterparty, although such nonperformance could have a material adverse effect on us. We have no collateral posted for our derivative instruments.

We have designated our interest rate swaps as cash flow hedging instruments. Changes in the fair value of cash flow hedging instruments are recognized as a component of other comprehensive income (loss) until the hedged transaction affects earnings. At that time, amounts are reclassified into earnings to interest expense, the same statement of operations line item to which the earnings effect of the hedged item is recorded. Cash flows from derivatives designated as hedges are classified in our condensed consolidated statements of cash flows under the same category as the cash flows from the underlying assets, liabilities or anticipated transactions unless the derivative contract contains a significant financing element, in which case, the cash settlements for these derivatives are classified as cash flows from financing activities.

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We expect the hedging relationship to be highly effective as the interest rate swap terms substantially coincide with the hedged item and are expected to offset changes in expected cash flows due to fluctuations in the variable rate. We estimate that $3.9 million of the deferred pre-tax loss attributable to interest rate swaps included in accumulated other comprehensive loss at June 30, 2021 will be reclassified into earnings as interest expense at then-current values during the next 12 months as the underlying hedged transactions occur.

As of June 30, 2021, the weighted average effective fixed interest rate of our interest rate swaps was 1.8%.

The following table presents the effect of our derivative instruments designated as cash flow hedging instruments on our condensed consolidated balance sheets:

(in thousands)	June 30, 2021		December 31, 2020
Accrued liabilities	$	3,853	$	4,810
Other liabilities		—		1,527
Total derivative liabilities	$	3,853	$	6,337

The following table presents the effect of our derivative instruments designated as cash flow hedging instruments on our condensed consolidated statements of operations:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Pre-tax loss recognized in other comprehensive income (loss)	$	(79)	$	(738)	$	(89)	$	(8,311)
Pre-tax loss reclassified from accumulated other comprehensive loss into interest expense		(1,302)		(1,073)		(2,573)		(1,322)
Total amount of interest expense in which the effects of cash flow hedges are recorded		25,958		25,778		57,203		55,443

See Note 10 (“Accumulated Other Comprehensive Loss”) and Note 18 (“Fair Value Measurements”) for further details on our derivative instruments.

18. Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

On a quarterly basis, our interest rate swap derivative instruments are valued based on the income approach (discounted cash flow) using market observable inputs, including LIBOR forward curves. These fair value measurements are classified as Level 2. The following table presents our derivative position measured at fair value on a recurring basis, with pricing levels as of the date of valuation:

(in thousands)	June 30, 2021		December 31, 2020
Derivative liability	$	3,853	$	6,337

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Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Goodwill

In the first quarter of 2020, we determined that the significant deterioration in global macroeconomic conditions caused by the COVID-19 pandemic was an indicator of potential impairment of our goodwill, and we performed a quantitative impairment test as of March 31, 2020 that resulted in a $99.8 million impairment of our goodwill. Significant estimates used in our impairment analysis included cash flow forecasts, our estimate of the market’s weighted average cost of capital and market multiples, which are Level 3 inputs. See Note 7 (“Goodwill”) for further details of the valuation methodology used in connection with the goodwill impairment.

Compressors

During the six months ended June 30, 2021, we recorded nonrecurring fair value measurements related to our idle and previously-culled compressors. Our estimate of the compressors’ fair value was primarily based on the expected net sale proceeds compared to other fleet units we recently sold and/or a review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use. We discounted the expected proceeds, net of selling and other carrying costs, using a weighted average disposal period of four years. These fair value measurements are classified as Level 3. The following table presents the fair value of our compressors impaired during 2021 and 2020:

(in thousands)	June 30, 2021		December 31, 2020
Impaired compressors	$	3,462	$	19,046

The significant unobservable inputs used to develop the above fair value measurements were weighted by the relative fair value of the compressors being measured. Additional quantitative information related to our significant unobservable inputs follows:

	Range	Weighted Average (1)
Estimated net sale proceeds:
As of June 30, 2021	$0 - $621 per horsepower	$30 per horsepower
As of December 31, 2020	$0 - $289 per horsepower	$20 per horsepower

(1) Calculated based on an estimated discount for market liquidity of 70% and 81% as of June 30, 2021 and December 31, 2020, respectively.

See Note 13 (“Long-Lived and Other Asset Impairment”) for further details.

Other Financial Instruments

The carrying amounts of our cash, receivables and payables approximate fair value due to the short-term nature of those instruments.

The carrying amount of borrowings outstanding under our Credit Facility approximates fair value due to its variable interest rate. The fair value of these outstanding borrowings is a Level 3 measurement.

The fair value of our fixed rate debt is estimated using yields observable in active markets, which are Level 2 inputs, and was as follows:

(in thousands)	June 30, 2021		December 31, 2020
Carrying amount of fixed rate debt (1)	$	1,295,990	$	1,295,867
Fair value of fixed rate debt		1,366,000		1,371,000

(1) Carrying amounts are shown net of unamortized debt premium and unamortized deferred financing costs. See Note 9 (“Long-Term Debt”).

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19. Stock-Based Compensation

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Equity award expense	$	3,178	$	2,772	$	5,841	$	5,778
Liability award expense		408		842		994		294
Total stock-based compensation expense	$	3,586	$	3,614	$	6,835	$	6,072

The following table presents the activity of our stock-settled restricted stock awards, restricted stock units and performance-based restricted stock units and our cash-settled performance-based restricted stock units during the six months ended June 30, 2021:

		Weighted
		Average
		Grant Date
		Fair Value
(shares in thousands)	Shares	Per Share
Non-vested, December 31, 2020	2,446	$	9.69
Granted	1,279		11.22
Vested	(620)		9.36
Canceled	(41)		9.82
Non-vested, June 30, 2021 (1)	3,064		10.39

(1) Comprised of 611 cash-settled units and 2,453 stock-settled awards and units.

As of June 30, 2021, we expect $20.0 million of unrecognized compensation cost related to our non-vested awards and units to be recognized over the weighted average period of 2.0 years.

20. Commitments and Contingencies

Performance Bonds

In the normal course of business we have issued performance bonds to various state authorities that ensure payment of certain obligations. We have also issued a bond to protect our 401(k) retirement plan against losses caused by acts of fraud or dishonesty. The bonds have expiration dates in 2021 through the fourth quarter of 2022, and maximum potential future payments of $2.2 million. As of June 30, 2021, we were in compliance with all obligations to which the performance bonds pertain.

Tax Matters

We are subject to a number of state and local taxes that are not income-based. As many of these taxes are subject to audit by the taxing authorities, it is possible that an audit could result in additional taxes due. We accrue for such additional taxes when we determine that it is probable that we have incurred a liability and we can reasonably estimate the amount of the liability. As of June 30, 2021 and December 31, 2020, we accrued $5.4 million and $5.6 million, respectively, for the outcomes of non-income-based tax audits. We do not expect that the ultimate resolutions of these audits will result in a material variance from the amounts accrued. We do not accrue for unasserted claims for tax audits unless we believe the assertion of a claim is probable, it is probable that it will be determined that the claim is owed and we can reasonably estimate the claim or range of the claim. We believe the likelihood is remote that the impact of potential unasserted claims from non-income-based tax audits could be material to our consolidated financial position, but it is possible that the resolution of future audits could be material to our consolidated results of operations or cash flows.

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Subject to the provisions of the tax matters agreement between Exterran Corporation and us, both parties agreed to indemnify the primary obligor of any return for tax periods beginning before and ending before or after the Spin-off (including any ongoing or future amendments and audits for these returns) for the portion of the tax liability (including interest and penalties) that relates to their respective operations reported in the filing. The tax contingencies mentioned above relate to tax matters for which we are responsible in managing the audit. As of December 31, 2020, we had an indemnification liability (including penalties and interest), in addition to the tax contingency above, of $1.6 million for our share of non-income-based tax contingencies related to audits being managed by Exterran Corporation. During the six months ended June 30, 2021, these audits were settled and our indemnification liability was reduced to zero.

Insurance Matters

Our business can be hazardous, involving unforeseen circumstances such as uncontrollable flows of natural gas or well fluids and fires or explosions. As is customary in our industry, we review our safety equipment and procedures and carry insurance against some, but not all, risks of our business. Our insurance coverage includes property damage, general liability and commercial automobile liability and other coverage we believe is appropriate. We believe that our insurance coverage is customary for the industry and adequate for our business; however, losses and liabilities not covered by insurance would increase our costs.

Additionally, we are substantially self-insured for workers’ compensation and employee group health claims in view of the relatively high per-incident deductibles we absorb under our insurance arrangements for these risks. Losses up to the deductible amounts are estimated and accrued based upon known facts, historical trends and industry averages. We are also self-insured for property damage to our offshore assets.

Litigation and Claims

In the ordinary course of business, we are involved in various pending or threatened legal actions. While we are unable to predict the ultimate outcome of these actions, we believe that any ultimate liability arising from any of these actions will not have a material adverse effect on our consolidated financial position, results of operations or cash flows, including our ability to pay dividends. However, because of the inherent uncertainty of litigation and arbitration proceedings, we cannot provide assurance that the resolution of any particular claim or proceeding to which we are a party will not have a material adverse effect on our consolidated financial position, results of operations or cash flows, including our ability to pay dividends.

21. Related Party Transactions

In connection with the closing of the Elite Acquisition, we issued 21.7 million shares of our common stock to JDH Capital, an affiliate of our customer Hilcorp. As long as JDH Capital, together with affiliates of Hilcorp, owns at least 7.5% of our outstanding common stock, it will have the right to designate one director to our Board of Directors. As of June 30, 2021, JDH Capital owned 11.1% of our outstanding common stock.

Jeffery D. Hildebrand, founder and executive chairman of Hilcorp, was appointed Director in August 2019 and served until his resignation on July 29, 2020, at which time Jason C. Rebrook, President of Hilcorp, was appointed Director to fill the resulting vacancy. Mr. Hildebrand did not receive compensation in his role as Director and Mr. Rebrook received no compensation in his role as Director in 2020. In December 2020, the Board of Directors voted to approve the payment of Director cash and equity compensation to Mr. Rebrook beginning in 2021.

Revenue from Hilcorp and affiliates was $9.6 million and $10.2 million during the three months ended June 30, 2021 and 2020, respectively, and $19.1 million and $20.8 million during the six months ended June 30, 2021 and 2020, respectively. Accounts receivable, net due from Hilcorp and affiliates was $4.4 million and $3.9 million as of June 30, 2021 and December 31, 2020, respectively.

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22. Segments

We manage our business segments primarily based on the type of product or service provided. We have two segments which we operate within the U.S.: contract operations and aftermarket services. The contract operations segment primarily provides natural gas compression services to meet specific customer requirements. The aftermarket services segment provides a full range of services to support the compression needs of customers, from parts sales and normal maintenance services to full operation of a customer’s owned assets.

We evaluate the performance of our segments based on gross margin for each segment. Revenue includes only sales to external customers.

	Contract		Aftermarket
(in thousands)	Operations		Services		Total
Three months ended June 30, 2021
Revenue	$	163,865	$	31,750	$	195,615
Gross margin		102,478		4,260		106,738
Three months ended June 30, 2020
Revenue	$	187,949	$	32,367	$	220,316
Gross margin		124,559		3,681		128,240
Six months ended June 30, 2021
Revenue	$	329,899	$	61,147	$	391,046
Gross margin		207,147		7,874		215,021
Six months ended June 30, 2020
Revenue	$	394,923	$	75,090	$	470,013
Gross margin		252,882		11,413		264,295

The following table reconciles total gross margin to income (loss) before income taxes:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Total gross margin	$	106,738	$	128,240	$	215,021	$	264,295
Less:
Selling, general and administrative		26,077		28,745		51,161		59,371
Depreciation and amortization		44,193		48,849		89,905		98,671
Long-lived and other asset impairment		2,960		55,210		10,033		61,405
Goodwill impairment		—		—		—		99,830
Restructuring charges		743		2,408		1,640		4,136
Interest expense		25,958		25,778		57,203		55,443
Debt extinguishment loss		—		3,971		—		3,971
(Gain) loss on sale of assets, net		(3,124)		2,189		(14,156)		(1,927)
Other income, net		(82)		(438)		(1,971)		(993)
Income (loss) before income taxes	$	10,013	$	(38,472)	$	21,206	$	(115,612)

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23. Subsequent Events

July 2021 Dispositions

In July 2021, we completed sales consisting of certain contract operations customer service agreements and approximately 575 compressors, comprising approximately 100,000 horsepower, used to provide compression services under those agreements, as well as other assets used to support the operations. We allocated customer-related and contract-based intangible assets based on a ratio of the horsepower sold relative to the total horsepower of the asset group. Total cash consideration for the sales will approximate $61.0 million and a gain on the sales of approximately $13.5 million will be recognized in the third quarter of 2021.

The proceeds received in July from the sales were used to repay borrowings outstanding under our Credit Facility. On July 1, 2021, we dedesignated $125.0 million notional value of our interest rate swaps. Amounts previously recognized in accumulated other comprehensive loss will remain there until the expected cash flows impact earnings or become probable of not occurring. Changes in the value of the dedesignated interest rate swaps will be recorded in earnings.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of our financial condition and results of operations should be read in conjunction with our unaudited Financial Statements and the notes thereto included in this Quarterly Report on Form 10-Q and in conjunction with our 2020 Form 10-K.

Overview

We are an energy infrastructure company with a pure-play focus on midstream natural gas compression. We are the leading provider of natural gas compression services to customers in the oil and natural gas industry throughout the U.S. and a leading supplier of aftermarket services to customers that own compression equipment in the U.S. We operate in two business segments: contract operations and aftermarket services. Our contract operations services primarily include designing, sourcing, owning, installing, operating, servicing, repairing and maintaining our owned fleet of natural gas compression equipment to provide natural gas compression services to our customers. In our aftermarket services business, we sell parts and components and provide operations, maintenance, overhaul and reconfiguration services to customers who own compression equipment.

Recent Business Developments

February 2021 Disposition

On February 10, 2021, we completed the sale of certain contract operations customer service agreements and approximately 300 compressors, comprising approximately 40,000 horsepower, used to provide compression services under those agreements as well as other assets used to support the operations. We recorded a gain on the sale of $6.0 million during the six months ended June 30, 2021. See Note 3 (“Business Transactions”) to our Financial Statements for further details of this transaction.

COVID-19 Pandemic

Beginning in the first quarter of 2020, the COVID-19 pandemic caused a deterioration in global macroeconomic conditions, including a collapse in the demand for natural gas and crude oil coupled with an oversupply of crude oil, which led to substantial spending cuts by our customers and a decline in natural gas and crude oil production. This global response to the pandemic has adversely impacted our revenue and cash flows. Though demand has shown improvement since the lows reached in the second quarter of 2020 as economies have reopened and vaccine rollout is underway globally, the potential for additional surges and variants of the disease remains and as such, uncertainty still exists around the timing and magnitude of a full economic recovery.

The key driver of our business is the production of U.S. natural gas and crude oil. Changes in natural gas and crude oil production spending therefore typically result in changes in demand for our services. According to the U.S. Energy Information Administration’s July 2021 Short-Term Energy Outlook, U.S. dry natural gas and crude oil production is expected to increase 1% and decline 2%, respectively, in 2021 as producers limit drilling and completion activity to achieve maintenance levels of production and cash flows in the course of the COVID-19 pandemic. U.S. production of both commodities is expected to increase in 2022 at a rate of 2% for dry natural gas and 7% for crude oil.

Our customers substantially cut spending and activity beginning in the second quarter of 2020 as a result of the significant declines in natural gas and crude oil prices and demand. Our horsepower, utilization and revenue have experienced declines and are expected to remain at lower levels in 2021 as compared to the first quarter of 2020 and periods prior in both our contract operations and aftermarket services businesses. However, U.S. onshore activity is on the rise, which we expect will provide prospects for growth in our businesses beginning as early as the second half of 2021.

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The impact of the COVID-19 pandemic on our results is primarily visible in the $99.8 million non-cash impairment of goodwill and the impairment’s resulting $22.7 million tax benefit in the first quarter of 2020. Revenue, cost of sales, SG&A, long-lived and other asset impairment and restructuring charges have also been significantly impacted. See “Financial Results of Operations” below and Note 7 (“Goodwill”), Note 13 (“Long-Lived and Other Asset Impairment”) and Note 14 (“Restructuring Charges”) to our Financial Statements for further discussion.

Operating Highlights

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Total available horsepower (at period end)(1)	4,041		4,203		4,041		4,203
Total operating horsepower (at period end)(2)	3,295		3,613		3,295		3,613
Average operating horsepower	3,316		3,752		3,339		3,826
Horsepower utilization:
Spot (at period end)	82	%	86	%	82	%	86	%
Average	82	%	86	%	82	%	87	%

(1) Defined as idle and operating horsepower. New compressors completed by third party manufacturers that have been delivered to us are included in the fleet.

(2) Defined as horsepower that is operating under contract and horsepower that is idle but under contract and generating revenue such as standby revenue.

Non-GAAP Financial Measures

Management uses a variety of financial and operating metrics to analyze our performance. These metrics are significant factors in assessing our operating results and profitability and include the non-GAAP financial measure of gross margin.

We define gross margin as total revenue less cost of sales (excluding depreciation and amortization). Gross margin is included as a supplemental disclosure because it is a primary measure used by our management to evaluate the results of revenue and cost of sales (excluding depreciation and amortization), which are key components of our operations. We believe gross margin is important because it focuses on the current operating performance of our operations and excludes the impact of the prior historical costs of the assets acquired or constructed that are utilized in those operations, the indirect costs associated with our SG&A activities, our financing methods and income taxes. In addition, depreciation and amortization may not accurately reflect the costs required to maintain and replenish the operational usage of our assets and therefore may not portray the costs of current operating activity. As an indicator of our operating performance, gross margin should not be considered an alternative to, or more meaningful than, net income (loss) as determined in accordance with GAAP. Our gross margin may not be comparable to a similarly-titled measure of other entities because other entities may not calculate gross margin in the same manner.

Gross margin has certain material limitations associated with its use as compared to net income (loss). These limitations are primarily due to the exclusion of SG&A, depreciation and amortization, impairments, restructuring charges, interest expense, debt extinguishment loss, (gain) loss on sale of assets, net, other (income) loss, net and provision for (benefit from) income taxes. Because we intend to finance a portion of our operations through borrowings, interest expense is a necessary element of our costs and our ability to generate revenue. Additionally, because we use capital assets, depreciation expense is a necessary element of our costs and our ability to generate revenue and SG&A is necessary to support our operations and required corporate activities. To compensate for these limitations, management uses this non-GAAP measure as a supplemental measure to other GAAP results to provide a more complete understanding of our performance.

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The following table reconciles net income (loss) to gross margin:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Net income (loss)	$	8,752	$	(30,381)	$	12,921	$	(91,568)
Selling, general and administrative		26,077		28,745		51,161		59,371
Depreciation and amortization		44,193		48,849		89,905		98,671
Long-lived and other asset impairment		2,960		55,210		10,033		61,405
Goodwill impairment		—		—		—		99,830
Restructuring charges		743		2,408		1,640		4,136
Interest expense		25,958		25,778		57,203		55,443
Debt extinguishment loss		—		3,971		—		3,971
(Gain) loss on sale of assets, net		(3,124)		2,189		(14,156)		(1,927)
Other income, net		(82)		(438)		(1,971)		(993)
Provision for (benefit from) income taxes		1,261		(8,091)		8,285		(24,044)
Gross margin	$	106,738	$	128,240	$	215,021	$	264,295

Results of Operations: Summary of Results

Revenue

Revenue was $195.6 million and $220.3 million during the three months ended June 30, 2021 and 2020, and $391.0 million and $470.0 million during the six months ended June 30, 2021 and 2020, respectively. The decreases in revenue during these periods were due to decreases in revenue from our contract operations and aftermarket services businesses. See “Contract Operations” and “Aftermarket Services” below for further details.

Net Income (Loss)

We had net income of $8.8 million and a net loss of $30.4 million during the three months ended June 30, 2021 and 2020, respectively, and net income of $12.9 million and a net loss of $91.6 million during the six months ended June 30, 2021 and 2020, respectively.

The change from net loss to net income during the three months ended June 30, 2021 compared to the three months ended June 30, 2020 was primarily driven by decreases in long-lived and other asset impairment, depreciation and amortization, debt extinguishment loss and SG&A as well as the change from a net loss to a net gain on sale of assets. These changes were partially offset by a decrease in gross margin from our contract operations business and the change from a benefit from to a provision for income taxes.

The change from net loss to net income during the six months ended June 30, 2021 compared to the six months ended June 30, 2020 was primarily driven by decreases in goodwill impairment, long-lived and other asset impairment, depreciation and amortization and SG&A as well as an increase in gain on sale of assets, net. These changes were partially offset by decreases in gross margin from our contract operations and aftermarket services businesses and the change from a benefit from to a provision for income taxes.

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Results of Operations: Three Months Ended June 30, 2021 Compared to Three Months Ended June 30, 2020

Contract Operations

	Three Months Ended
	June 30,						Increase
(dollars in thousands)	2021			2020			(Decrease)
Revenue	$	163,865		$	187,949		(13)	%
Cost of sales (excluding depreciation and amortization)		61,387			63,390		(3)	%
Gross margin	$	102,478		$	124,559		(18)	%
Gross margin percentage (1)		63	%		66	%	(3)	%

(1) Defined as gross margin divided by revenue.

Revenue decreased primarily due to returns of horsepower amidst the market downturn and the strategic disposition of horsepower in 2020 and the first quarter of 2021.

Gross margin decreased due to the decrease in revenue, however, the decline was moderately mitigated by the decrease in cost of sales. The lower operating horsepower discussed above drove a decrease in maintenance, freight and other operating expenses. The impact of horsepower returns was partially offset by an increase in unit redeployment in the second quarter of 2021, which in turn led to an increase in mobilization expense.

Aftermarket Services

	Three Months Ended
	June 30,						Increase
(dollars in thousands)	2021			2020			(Decrease)
Revenue	$	31,750		$	32,367		(2)	%
Cost of sales (excluding depreciation and amortization)		27,490			28,686		(4)	%
Gross margin	$	4,260		$	3,681		16	%
Gross margin percentage		13	%		11	%	2	%

Revenue decreased primarily due to the impact of the sale of our turbocharger business in July 2020. Partially offsetting this decrease was an increase in parts sales as a result of an increase in customer demand beginning in the second quarter of 2021.

Despite the decrease in revenue, gross margin improved due to a larger decrease in cost of sales. The decrease in cost of sales was primarily the result of the sale of our turbocharger business. Excluding the impact of the July 2020 Disposition, cost of sales was flat quarter over quarter and gross margin increased as a result of the increase in parts sales revenue mentioned above.

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Costs and Expenses

	Three Months Ended
	June 30,
(in thousands)	2021		2020
Selling, general and administrative	$	26,077	$	28,745
Depreciation and amortization		44,193		48,849
Long-lived and other asset impairment		2,960		55,210
Restructuring charges		743		2,408
Interest expense		25,958		25,778
Debt extinguishment loss		—		3,971
(Gain) loss on sale of assets, net		(3,124)		2,189
Other income, net		(82)		(438)

Selling, general and administrative. The decrease in SG&A was primarily due to a $2.0 million decrease in bad debt expense, a $0.4 million decrease in sales and use tax and a $0.3 million decrease in compensation and benefits.

Depreciation and amortization. The decrease in depreciation and amortization expense was primarily due to a decrease in depreciation expense resulting from assets reaching the end of their depreciable lives, the impact of compression and other asset impairments and sales during 2020 and early 2021 and a decrease in amortization expense as certain intangible assets reached the end of their useful lives. These decreases were partially offset by an increase in depreciation expense associated with fixed asset additions during 2020 and early 2021.

Long-lived and other asset impairment. We periodically review the future deployment of our idle compressors for units that are not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. In addition, we evaluate for impairment idle units that have been culled from our compression fleet in prior years and are available for sale. See Note 13 (“Long-Lived and Other Asset Impairment”) to our Financial Statements for further details. The following table presents the results of our compression fleet impairment review, as recorded in our contract operations segment:

	Three Months Ended
	June 30,
(dollars in thousands)	2021		2020
Idle compressors retired from the active fleet		45		450
Horsepower of idle compressors retired from the active fleet		13,000		184,000
Impairment recorded on idle compressors retired from the active fleet	$	2,832	$	55,210

Restructuring charges. Restructuring charges of $0.7 million and $2.4 million during the three months ended June 30, 2021 and 2020, respectively, primarily consisted of severance costs related to our pandemic restructuring activities. See Note 14 (“Restructuring Charges”) to our Financial Statements for further details.

Interest expense. Interest expense was flat due to an increase in the weighted average effective interest rate and an offsetting decrease in the average outstanding balance of long-term debt.

Debt extinguishment loss. We recorded a debt extinguishment loss of $4.0 million during the three months ended June 30, 2020 as a result of the redemption of the 2022 Notes. See Note 9 (“Long-Term Debt”) to our Financial Statements for further details.

(Gain) loss on sale of assets, net. The change in (gain) loss on sale of assets, net was primarily due to a $2.1 million gain on compression assets sold during the three months ended June 30, 2021, compared to a $2.9 million loss on compression assets sold during the three months ended June 30, 2020.

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Provision for (Benefit from) Income Taxes

	Three Months Ended
	June 30,						Increase
(dollars in thousands)	2021			2020			(Decrease)
Provision for (benefit from) income taxes	$	1,261		$	(8,091)		(116)	%
Effective tax rate		13	%		21	%	(8)	%

The change from a benefit from to a provision for income taxes was primarily due to the tax effect of the increase in book income during the three months ended June 30, 2021 compared to the three months ended June 30, 2020.

Results of Operations: Six Months Ended June 30, 2021 Compared to Six Months Ended June 30, 2020

Contract Operations

	Six Months Ended
	June 30,						Increase
(dollars in thousands)	2021			2020			(Decrease)
Revenue	$	329,899		$	394,923		(16)	%
Cost of sales (excluding depreciation and amortization)		122,752			142,041		(14)	%
Gross margin	$	207,147		$	252,882		(18)	%
Gross margin percentage		63	%		64	%	(1)	%

Revenue decreased primarily due to returns of horsepower and a decrease in contract operations rates amidst the market downturn, as well as the strategic disposition of horsepower in 2020 and the first quarter of 2021.

Gross margin decreased due to the decrease in revenue, however, the decline was significantly mitigated by the decrease in cost of sales. The lower operating horsepower discussed above drove a decrease in maintenance, lube oil, freight and other operating expenses.

Aftermarket Services

	Six Months Ended
	June 30,						Increase
(dollars in thousands)	2021			2020			(Decrease)
Revenue	$	61,147		$	75,090		(19)	%
Cost of sales (excluding depreciation and amortization)		53,273			63,677		(16)	%
Gross margin	$	7,874		$	11,413		(31)	%
Gross margin percentage		13	%		15	%	(2)	%

Revenue decreased due to decreases in service activities and parts sales, which were primarily driven by reduced customer demand and customer deferral of maintenance activities amidst the market downturn, as well as the impact of the sale of our turbocharger business in July 2020.

Gross margin decreased due to the decrease in revenue, however, the decline was largely mitigated by the decrease in cost of sales. The decrease in cost of sales was driven by the same decreases in service activities and parts sales discussed above and the impact of the July 2020 Disposition.

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Costs and Expenses

	Six Months Ended
	June 30,
(in thousands)	2021		2020
Selling, general and administrative	$	51,161	$	59,371
Depreciation and amortization		89,905		98,671
Long-lived and other asset impairment		10,033		61,405
Goodwill impairment		—		99,830
Restructuring charges		1,640		4,136
Interest expense		57,203		55,443
Debt extinguishment loss		—		3,971
Gain on sale of assets, net		(14,156)		(1,927)
Other income, net		(1,971)		(993)

Selling, general and administrative. The decrease in SG&A was primarily due to a $2.5 million decrease in bad debt expense, a $2.4 million decrease in sales and use tax, a $1.6 million decrease in compensation and benefits, a $0.8 million decrease in employee travel and meeting expenses and a $0.7 million decrease in costs related to our process and technology transformation project.

Depreciation and amortization. The decrease in depreciation and amortization expense was primarily due to a decrease in depreciation expense resulting from assets reaching the end of their depreciable lives, the impact of compression and other asset impairments and sales during 2020 and early 2021 and a decrease in amortization expense as certain intangible assets reached the end of their useful lives. These decreases were partially offset by an increase in depreciation expense associated with fixed asset additions during 2020 and early 2021.

Long-lived and other asset impairment. We periodically review the future deployment of our idle compressors for units that are not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. In addition, we evaluate for impairment idle units that have been culled from our compression fleet in prior years and are available for sale. See Note 13 (“Long-Lived and Other Asset Impairment”) to our Financial Statements for further details. The following table presents the results of our compression fleet impairment review, as recorded in our contract operations segment:

	Six Months Ended
	June 30,
(dollars in thousands)	2021		2020
Idle compressors retired from the active fleet		115		535
Horsepower of idle compressors retired from the active fleet		37,000		207,000
Impairment recorded on idle compressors retired from the active fleet	$	9,844	$	61,405

Goodwill impairment. During the six months ended June 30, 2020, we recorded goodwill impairment of $99.8 million due to the decline in the fair value of our contract operations reporting unit. See Note 7 (“Goodwill”) to our Financial Statements for further details.

Restructuring charges. Restructuring charges of $1.6 million and $4.1 million during the six months ended June 30, 2021 and 2020, respectively, primarily consisted of severance costs related to our organizational and pandemic restructuring activities. See Note 14 (“Restructuring Charges”) to our Financial Statements for further details.

Interest expense. The increase in interest expense was primarily due to the $4.9 million write-off of unamortized deferred financing costs related to Amendment No. 3 and an increase in the weighted average effective interest rate, partially offset by a decrease in the average outstanding balance of long-term debt.

35

Debt extinguishment loss. We recorded a debt extinguishment loss of $4.0 million during the six months ended June 30, 2020 as a result of the redemption of the 2022 Notes. See Note 9 (“Long-Term Debt”) to our Financial Statements for further details.

Gain on sale of assets, net. Our net gain on sale of assets during the six months ended June 30, 2021 was primarily the result of the $6.0 million gain on the February 2021 Disposition and a $6.4 million gain recognized on other compression asset sales. Our net gain on sale of assets during the six months ended June 30, 2020 was primarily due to the $3.2 million gain recorded on the March 2020 Disposition, which was partially offset by a $2.8 million loss on other compression assets sold. See Note 3 (“Business Transactions”) to our Financial Statements for further details of these sales.

Other income, net. The increase in other income, net was primarily due to a $0.7 million decrease in indemnification expense remitted pursuant to our tax matters agreement with Exterran Corporation.

Provision for (Benefit from) Income Taxes

	Six Months Ended
	June 30,						Increase
(dollars in thousands)	2021			2020			(Decrease)
Provision for (benefit from) income taxes	$	8,285		$	(24,044)		(134)	%
Effective tax rate		39	%		21	%	18	%

The change from a benefit from to a provision for income taxes was primarily due to the tax effect of the increase in book income during the six months ended June 30, 2021 compared to the six months ended June 30, 2020.

Liquidity and Capital Resources

Capital Requirements

Our contract operations business is capital intensive, requiring significant investment to maintain and upgrade existing operations. Our capital spending is primarily dependent on the demand for our contract operations services and the availability of the type of compression equipment required for us to provide those contract operations services to our customers. Our capital requirements have primarily consisted of, and we anticipate will continue to consist of, the following:

● growth capital expenditures, which are made to expand or to replace partially or fully depreciated assets or to expand the operating capacity or revenue-generating capabilities of existing or new assets; and

● maintenance capital expenditures, which are made to maintain the existing operating capacity of our assets and related cash flows, further extending the useful lives of the assets.

The majority of our growth capital expenditures are related to the acquisition cost of new compressors when our idle equipment cannot be reconfigured to economically fulfill a project’s requirements and the new compressor is expected to generate economic returns over its expected useful life that exceed our cost of capital. In addition to newly-acquired compressors, growth capital expenditures include the upgrading of major components on an existing compression package where the current configuration of the compression package is no longer in demand and the compressor is not likely to return to an operating status without the capital expenditures. These expenditures substantially modify the operating parameters of the compression package such that it can be used in applications for which it previously was not suited.

Maintenance capital expenditures are related to major overhauls or significant components of a compression package such as the engine, compressor and cooler, which return the components to a like-new condition but do not modify the application for which the compression package was designed.

36

Projected Capital Spend

We currently plan to spend approximately $80 million to $106 million in capital expenditures during 2021, primarily consisting of approximately $30 million to $50 million for growth capital expenditures and approximately $40 million to $45 million for maintenance capital expenditures. We anticipate decreased 2021 capital expenditures, particularly growth capital expenditures, as compared to 2020 due to the impact that we expect the COVID-19 pandemic will continue to have on customer demand.

Financial Resources

Overview

Our ability to fund operations, finance capital expenditures and pay dividends depends on the levels of our operating cash flows and access to the capital and credit markets. Our primary sources of liquidity are cash flows generated from our operations and our borrowing availability under our Credit Facility. Our cash flow is affected by numerous factors including prices and demand for our services, oil and natural gas exploration and production spending, conditions in the financial markets and other factors. Beginning in the first quarter of 2020, the COVID-19 pandemic caused a deterioration in global macroeconomic conditions, which adversely impacted our estimates of future revenues and cash flows. However, we have no near-term maturities and believe that our operating cash flows and borrowings under the Credit Facility will be sufficient to meet our future liquidity needs.

We may from time to time seek to retire or purchase our outstanding debt through cash purchases and/or exchanges for equity securities in open market purchases, privately negotiated transactions or otherwise. Such repurchases or exchanges, if any, will depend on prevailing market conditions, our liquidity requirements, contractual restrictions and other factors.

Credit Facility

During the six months ended June 30, 2021 and 2020, the Credit Facility had an average daily balance of $345.3 million and $675.5 million, respectively. The weighted average annual interest rate on the outstanding balance under the Credit Facility, excluding the effect of interest rate swaps, was 2.5% and 2.7% at June 30, 2021 and December 31, 2020, respectively. As of June 30, 2021, there were $12.5 million letters of credit outstanding under the Credit Facility.

We must maintain certain consolidated financial ratios as defined in our Credit Facility agreement (see below). As of June 30, 2021, the ratio requirements did not constrain our undrawn capacity and as such, $421.0 million was available for additional borrowings. As of June 30, 2021, we were in compliance with all covenants under the Credit Facility agreement.

Amendment No. 3. On February 22, 2021, we amended our Credit Facility to, among other things:

● reduce the aggregate revolving commitment from $1.25 billion to $750.0 million, and

● adjust the maximum Senior Secured Debt to EBITDA and Total Debt to EBITDA ratios, as defined in the Credit Facility agreement, to the following:

Senior Secured Debt to EBITDA	3.00 to 1.0
Total Debt to EBITDA
Through fiscal year 2022	5.75 to 1.0
January 1, 2023 through September 30, 2023	5.50 to 1.0
Thereafter (1)	5.25 to 1.0

(1) Subject to a temporary increase to 5.50 to 1.0 for any quarter during which an acquisition satisfying certain thresholds is completed and for the two quarters immediately following such quarter.

See Note 9 (“Long-Term Debt”) to our Financial Statements for further details on Amendment No. 3.

37

At-the-Market Continuous Equity Offering Program

On February 23, 2021, we entered into the ATM Agreement whereby we may sell from time to time shares of our common stock having an aggregate offering price of up to $50.0 million. We intend to use the net proceeds of these offerings for general corporate purposes. During the six months ended June 30, 2021, we sold 357,148 shares of common stock for net proceeds of $3.4 million pursuant to the ATM Agreement. See Note 11 (“Equity”) to our Financial Statements for further details on the ATM Agreement.

Business Dispositions

In July 2021, we completed sales of compressors and other assets for which total consideration will approximate $61.0 million. The proceeds received in July from the sales were used to repay borrowings outstanding under our Credit Facility. See Note 23 (“Subsequent Events”) to our Financial Statements for further details on these sales.

Cash Flows

Our cash flows from operating, investing and financing activities, as reflected in our condensed consolidated statements of cash flows, are summarized below:

	Six Months Ended
	June 30,
(in thousands)	2021		2020
Net cash provided by (used in):
Operating activities	$	126,617	$	167,074
Investing activities		(866)		(82,688)
Financing activities		(123,536)		(85,866)
Net increase (decrease) in cash and cash equivalents	$	2,215	$	(1,480)

Operating Activities

The decrease in net cash provided by operating activities was primarily due to reduced cash inflows from revenue, deferred revenue and accounts receivable, as well as increased cash outflow for inventory, partially offset by decreased cash outflows for cost of sales, SG&A expenses, accounts payable and other liabilities, interest paid on long-term debt and restructuring charges.

Investing Activities

The decrease in net cash used in investing activities was primarily due to a $74.5 million decrease in capital expenditures and a $13.1 million increase in proceeds from sales of property, plant and equipment, partially offset by a $5.4 million decrease in proceeds from business dispositions.

Financing Activities

The increase in net cash used in financing activities was primarily due to a $36.5 million increase in net repayments of long-term debt, partially offset by $3.4 million of net proceeds from the issuance of common stock under the ATM Agreement during the six months ended June 30, 2021.

38

Dividends

On July 28, 2021, our Board of Directors declared a quarterly dividend of $0.145 per share of common stock to be paid on August 16, 2021 to stockholders of record at the close of business on August 9, 2021. Any future determinations to pay cash dividends to our stockholders will be at the discretion of our Board of Directors and will be dependent upon our financial condition, results of operations and credit and loan agreements in effect at that time and other factors deemed relevant by our Board of Directors.

Off-Balance Sheet Arrangements

For information on our obligations with respect to letters of credit and performance bonds see Note 9 (“Long-Term Debt”) and Note 20 (“Commitments and Contingencies”), respectively, to our Financial Statements.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

For quantitative and qualitative disclosures about market risk, see Item 7A “Quantitative and Qualitative Disclosures About Market Risk” of our 2020 Form 10-K. Our exposures as of June 30, 2021 have not changed materially since December 31, 2020.

Item 4. Controls and Procedures

This Item 4 includes information concerning the controls and controls evaluation referred to in the certifications of our Chief Executive Officer and Chief Financial Officer required by Rule 13a-14 of the Exchange Act included in this Quarterly Report as Exhibits 31.1 and 31.2.

Management’s Evaluation of Disclosure Controls and Procedures

Disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act) are designed to ensure that information required to be disclosed in reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in SEC rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that such information is accumulated and communicated to management to allow timely decisions regarding required disclosures.

As of the end of the period covered by this Quarterly Report on Form 10-Q, our principal executive officer and principal financial officer evaluated the effectiveness of our disclosure controls and procedures (as defined in Rule 13a-15(e) of the Exchange Act), which are designed to provide reasonable assurance that we are able to record, process, summarize and report the information required to be disclosed in our reports under the Exchange Act within the time periods specified in the rules and forms of the SEC. Based on the evaluation, as of June 30, 2021 our principal executive officer and principal financial officer concluded that our disclosure controls and procedures were effective to provide reasonable assurance that the information required to be disclosed in reports that we file or submit under the Exchange Act is accumulated and communicated to management, and made known to our principal executive officer and principal financial officer, on a timely basis to ensure that it is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) during the last fiscal quarter that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

39

PART II. OTHER INFORMATION

Item 1. Legal Proceedings

In the ordinary course of business, we are involved in various pending or threatened legal actions. While we are unable to predict the ultimate outcome of these actions, we believe that any ultimate liability arising from any of these actions will not have a material adverse effect on our consolidated financial position, results of operations or cash flows, including our ability to pay dividends. However, because of the inherent uncertainty of litigation and arbitration proceedings, we cannot provide assurance that the resolution of any particular claim or proceeding to which we are a party will not have a material adverse effect on our consolidated financial position, results of operations or cash flows, including our ability to pay dividends.

Item 1A. Risk Factors

There have been no material changes or updates to the risk factors previously disclosed in our 2020 Form 10-K.

Item 2. Purchases of Equity Securities by Issuer and Affiliated Purchasers

The following table summarizes our purchases of equity securities during the three months ended June 30, 2021:

					Maximum
					Number of Shares
				Total Number of	That May Yet be
		Average		Shares Purchased	Purchased Under
	Total Number	Price		as Part of Publicly	the Publicly
	of Shares	Paid per		Announced Plans	Announced Plans
	Purchased (1)	Share		or Programs	or Programs
April 1, 2021 — April 30, 2021	383	$	9.75	N/A	N/A
May 1, 2021 — May 31, 2021	—		—	N/A	N/A
June 1, 2021 — June 30, 2021	—		—	N/A	N/A
Total	383		9.75	N/A	N/A

(1) Represents shares withheld to satisfy employees’ tax withholding obligations in connection with the vesting of restricted stock awards during the period.

Item 3. Defaults upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

40

Item 6. Exhibits

Exhibit No.	Description
2.1	Asset Purchase Agreement, dated as of June 23, 2019, by and among Archrock Services, L.P., Archrock, Inc. and Elite Compression Services, LLC, incorporated by reference to Exhibit 2.1 of the Registrant’s Current Report on Form 8-K filed on June 24, 2019
2.2	Asset Purchase Agreement, dated as of June 23, 2019, by and between Archrock Services, L.P. and Harvest Four Corners, LLC, incorporated by reference to Exhibit 2.2 of the Registrant’s Current Report on Form 8-K filed on June 24, 2019
3.1	Composite Certificate of Incorporation of Archrock, Inc. (as amended as of November 3, 2015), incorporated by reference to Exhibit 3.3 to the Registrant’s Annual Report on Form 10-K for the year ended December 31, 2015
3.2	Third Amended and Restated Bylaws of Exterran Holdings, Inc. (now Archrock, Inc.), incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K filed on March 20, 2013
3.3	Amendment No. 1 to Third Amended and Restated Bylaws of Archrock, Inc., incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K filed on May 5, 2020
4.1	Indenture, dated as of March 21, 2019, by and among Archrock Partners, L.P., Archrock Partners Finance Corp., the guarantors party thereto and Wells Fargo Bank, National Association, as trustee, incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K filed on March 21, 2019
4.2	Indenture, dated as of December 20, 2019, by and among Archrock Partners, L.P., Archrock Partners Finance Corp., the guarantors party thereto and Wells Fargo Bank, National Association, as trustee, incorporated by reference to Exhibit 4.1 of the Registrant’s Current Report on Form 8-K filed on December 20, 2019
10.1	Form of Compensation Letter (incorporated by reference and filed as Exhibit 10.1 to Form 8-K filed on April 30, 2020), incorporated by reference to Exhibit 10.1 of the Registrant’s Current Report on Form 8-K filed on June 21, 2021
31.1*	Certification of the Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2*	Certification of the Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1**	Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2**	Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101.1*	Interactive data files pursuant to Rule 405 of Regulation S-T
104.1*	Cover page interactive data files pursuant to Rule 406 of Regulation S-T

*      Filed herewith.

**    Furnished, not filed.

41

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Archrock, Inc.
By:	/s/ Douglas S. Aron
	Douglas S. Aron
	Senior Vice President and Chief Financial Officer
	(Principal Financial Officer)
By:	/s/ Donna A. Henderson
	Donna A. Henderson
	Vice President and Chief Accounting Officer
	(Principal Accounting Officer)
	July 30, 2021

42

EX-31.1

Exhibit 31.1

Certification

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, D. Bradley Childers, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Archrock, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 30, 2021

By:	/s/ D. Bradley Childers
	Name:  D. Bradley Childers
	Title:    President and Chief Executive Officer
	(Principal Executive Officer)

EX-31.2

Exhibit 31.2

Certification

Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002

I, Douglas S. Aron, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Archrock, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a. designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a. all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b. any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: July 30, 2021

By:	/s/ Douglas S. Aron
	Name:  Douglas S. Aron
	Title:    Senior Vice President and Chief Financial Officer
	(Principal Financial Officer)

EX-32.1

Exhibit 32.1

Certification of CEO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Archrock, Inc. (the “Company”) for the quarter ended June 30, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), D. Bradley Childers, as Chief Executive Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

1. the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ D. Bradley Childers

Name:  D. Bradley Childers

Title:    President and Chief Executive Officer

Date: July 30, 2021

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

Certification of CFO Pursuant to

18 U.S.C. Section 1350,

as Adopted Pursuant to

Section 906 of the Sarbanes-Oxley Act of 2002

In connection with the Quarterly Report on Form 10-Q of Archrock, Inc. (the “Company”) for the quarter ended June 30, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Douglas S. Aron, as Chief Financial Officer of the Company, hereby certifies, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to his knowledge:

1. the Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ Douglas S. Aron

Name:   Douglas S. Aron

Title:     Senior Vice President and Chief Financial Officer

Date: July 30, 2021

A signed original of this written statement required by Section 906, or other document authenticating, acknowledging, or otherwise adopting the signature that appears in typed form within the electronic version of this written statement required by Section 906, has been provided to the Company and will be retained by the Company and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Cover - shares	6 Months Ended
	Jun. 30, 2021	Jul. 23, 2021
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2021
Document Transition Report	false
Commission File Number	001-33666
Entity Registrant Name	Archrock, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	74-3204509
Entity Street Address	9807 Katy Freeway
Entity Suite Number	Suite 100
Entity City	Houston
Entity State	TX
Entity Postal Zip Code	77024
City Area Code	281
Local Phone Number	836-8000
Title of each class	Common stock, $0.01 par value per share
Trading Symbol	AROC
Name of exchange on which registered	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		154,041,024
Entity Central Index Key	0001389050
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 3,312	$ 1,097
Accounts receivable, trade, net of allowance	106,393	104,425
Inventory	65,885	63,670
Other current assets	12,265	12,819
Total current assets	187,855	182,011
Property, plant and equipment, net	2,322,400	2,389,674
Operating lease ROU assets	18,404	19,236
Intangible assets, net	54,684	61,531
Contract costs, net	24,661	29,216
Deferred tax assets	51,294	56,934
Other assets	25,936	30,084
Noncurrent assets associated with discontinued operations	10,424	11,036
Total assets	2,695,658	2,779,722
Current liabilities:
Accounts payable, trade	45,096	30,819
Accrued liabilities	77,376	76,993
Deferred revenue	3,078	3,880
Total current liabilities	125,550	111,692
Long-term debt	1,612,490	1,688,867
Operating lease liabilities	16,446	16,925
Deferred tax liabilities	761	725
Other liabilities	18,722	18,088
Noncurrent liabilities associated with discontinued operations	7,868	7,868
Total liabilities	1,781,837	1,844,165
Commitments and contingencies
Equity:
Preferred stock: $0.01 par value per share, 50,000,000 shares authorized, zero issued
Common stock: $0.01 par value per share, 250,000,000 shares authorized, 161,339,554 and 160,014,960 shares issued, respectively	1,613	1,600
Additional paid-in capital	3,434,224	3,424,624
Accumulated other comprehensive loss	(3,044)	(5,006)
Accumulated deficit	(2,433,553)	(2,401,988)
Treasury stock: 7,278,449 and 7,052,769 common shares, at cost, respectively	(85,419)	(83,673)
Total equity	913,821	935,557
Total liabilities and equity	$ 2,695,658	$ 2,779,722

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 2,731	$ 3,370
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	161,339,554	160,014,960
Treasury stock, common shares (in shares)	7,278,449	7,052,769

XML

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues	$ 195,615	$ 220,316	$ 391,046	$ 470,013
Total cost of sales (excluding depreciation and amortization)	88,877	92,076	176,025	205,718
Selling, general and administrative	26,077	28,745	51,161	59,371
Depreciation and amortization	44,193	48,849	89,905	98,671
Long-lived and other asset impairment	2,960	55,210	10,033	61,405
Goodwill impairment				99,830
Restructuring charges	743	2,408	1,640	4,136
Interest expense	25,958	25,778	57,203	55,443
Debt extinguishment loss		3,971		3,971
(Gain) loss on sale of assets, net	(3,124)	2,189	(14,156)	(1,927)
Other income, net	(82)	(438)	(1,971)	(993)
Income (loss) before income taxes	10,013	(38,472)	21,206	(115,612)
Provision for (benefit from) income taxes	1,261	(8,091)	8,285	(24,044)
Net income (loss)	$ 8,752	$ (30,381)	$ 12,921	$ (91,568)
Basic net income (loss) per common share (in dollars per share)	$ 0.06	$ (0.20)	$ 0.08	$ (0.61)
Diluted net income (loss) per common share (in dollars per share)	$ 0.06	$ (0.20)	$ 0.08	$ (0.61)
Weighted average common shares outstanding:
Basic (in shares)	152,033	150,743	151,537	150,628
Diluted (in shares)	152,203	150,743	151,699	150,628
Contract Operations
Revenues	$ 163,865	$ 187,949	$ 329,899	$ 394,923
Total cost of sales (excluding depreciation and amortization)	61,387	63,390	122,752	142,041
Aftermarket Services
Revenues	31,750	32,367	61,147	75,090
Total cost of sales (excluding depreciation and amortization)	$ 27,490	$ 28,686	$ 53,273	$ 63,677

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income
Net income (loss)	$ 8,752	$ (30,381)	$ 12,921	$ (91,568)
Other comprehensive income (loss), net of tax:
Interest rate swap gain (loss), net of reclassifications to earnings	966	265	1,962	(5,521)
Total other comprehensive income (loss), net of tax	966	265	1,962	(5,521)
Comprehensive income (loss)	$ 9,718	$ (30,116)	$ 14,883	$ (97,089)

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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit	Treasury Stock	ATM Agreement	Cumulative Effect, Period of Adoption, Adjustment	Total
Beginning balance at Dec. 31, 2019	$ 1,587	$ 3,412,509	$ (1,387)	$ 166	$ (2,244,877)	$ (81,869)		$ 166	$ 1,085,963
Stockholders' Equity, Beginning, shares at Dec. 31, 2019	158,636,918					(6,702,602)
Increase (Decrease) in Stockholders' Equity
Treasury stock purchased						$ (834)			(834)
Treasury stock purchased, shares						(96,157)
Cash dividends					(44,347)				(44,347)
Shares issued under ESPP	$ 1	366							367
Shares issued under ESPP (in shares)	110,255
Stock-based compensation, net of forfeitures	$ 10	5,959							5,969
Stock-based compensation, net of forfeitures, shares	1,063,163					(62,225)
Contribution from Exterran Corporation		678							678
Comprehensive income (loss)
Net income (loss)					(91,568)				(91,568)
Interest rate swap gain (loss), net of reclassifications to earnings			(5,521)						(5,521)
Ending balance at Jun. 30, 2020	$ 1,598	3,419,512	(6,908)		(2,380,626)	$ (82,703)			950,873
Stockholders' Equity, Ending, shares at Jun. 30, 2020	159,810,336					(6,860,984)
Beginning balance at Mar. 31, 2020	$ 1,598	3,415,784	(7,173)		(2,328,069)	$ (82,668)			999,472
Stockholders' Equity, Beginning, shares at Mar. 31, 2020	159,756,498					(6,830,407)
Increase (Decrease) in Stockholders' Equity
Treasury stock purchased						$ (35)			(35)
Treasury stock purchased, shares						(5,563)
Cash dividends					(22,176)				(22,176)
Shares issued under ESPP		165							165
Shares issued under ESPP (in shares)	53,838
Stock-based compensation, net of forfeitures		2,885							2,885
Stock-based compensation, net of forfeitures, shares						(25,014)
Contribution from Exterran Corporation		678							678
Comprehensive income (loss)
Net income (loss)					(30,381)				(30,381)
Interest rate swap gain (loss), net of reclassifications to earnings			265						265
Ending balance at Jun. 30, 2020	$ 1,598	3,419,512	(6,908)		(2,380,626)	$ (82,703)			950,873
Stockholders' Equity, Ending, shares at Jun. 30, 2020	159,810,336					(6,860,984)
Beginning balance at Dec. 31, 2020	$ 1,600	3,424,624	(5,006)		(2,401,988)	$ (83,673)			935,557
Stockholders' Equity, Beginning, shares at Dec. 31, 2020	160,014,960					(7,052,769)
Increase (Decrease) in Stockholders' Equity
Treasury stock purchased						$ (1,746)			(1,746)
Treasury stock purchased, shares						(184,776)
Cash dividends					(44,486)				(44,486)
Shares issued under ESPP		371							371
Shares issued under ESPP (in shares)	44,116
Stock-based compensation, net of forfeitures	$ 9	5,832							5,841
Stock-based compensation, net of forfeitures, shares	923,330					(40,904)
Net proceeds from issuance of common stock	$ 4	3,397							3,401
Net proceeds from issuance of common stock (in shares)	357,148						357,148
Comprehensive income (loss)
Net income (loss)					12,921				12,921
Interest rate swap gain (loss), net of reclassifications to earnings			1,962						1,962
Ending balance at Jun. 30, 2021	$ 1,613	3,434,224	(3,044)		(2,433,553)	$ (85,419)			913,821
Stockholders' Equity, Ending, shares at Jun. 30, 2021	161,339,554					(7,278,449)
Beginning balance at Mar. 31, 2021	$ 1,613	3,430,910	(4,010)		(2,419,974)	$ (85,415)			923,124
Stockholders' Equity, Beginning, shares at Mar. 31, 2021	161,323,492					(7,263,173)
Increase (Decrease) in Stockholders' Equity
Treasury stock purchased						$ (4)			(4)
Treasury stock purchased, shares						(383)
Cash dividends					(22,331)				(22,331)
Shares issued under ESPP		136							136
Shares issued under ESPP (in shares)	16,062
Stock-based compensation, net of forfeitures		3,178							3,178
Stock-based compensation, net of forfeitures, shares						(14,893)
Comprehensive income (loss)
Net income (loss)					8,752				8,752
Interest rate swap gain (loss), net of reclassifications to earnings			966						966
Ending balance at Jun. 30, 2021	$ 1,613	$ 3,434,224	$ (3,044)		$ (2,433,553)	$ (85,419)			$ 913,821
Stockholders' Equity, Ending, shares at Jun. 30, 2021	161,339,554					(7,278,449)

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CONSOLIDATED STATEMENTS OF EQUITY (Parentheticals) - $ / shares	3 Months Ended						6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Stockholders' Equity
Dividend declared per common stock (in dollars per share)	$ 0.145	$ 0.145	$ 0.145	$ 0.145	$ 0.145	$ 0.145	$ 0.290	$ 0.290

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 12,921	$ (91,568)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	89,905	98,671
Long-lived and other asset impairment	10,033	61,405
Goodwill impairment		99,830
Inventory write-downs	511	695
Amortization of operating lease ROU assets	1,891	1,627
Amortization of deferred financing costs	7,551	2,856
Amortization of debt discount		187
Amortization of debt premium	(1,003)
Debt extinguishment loss		3,971
Interest rate swaps	2,169	928
Stock-based compensation expense	5,841	5,778
Non-cash restructuring charges		162
Provision for (benefit from) credit losses	(215)	2,282
(Gain) loss on sale of assets, net	(8,161)	1,245
Gain on sale of business	(5,995)	(3,172)
Deferred income tax provision (benefit)	7,995	(24,117)
Amortization of contract costs	10,752	13,656
Deferred revenue recognized in earnings	(5,048)	(12,762)
Change in assets and liabilities, net of acquisition:
Accounts receivable, trade	(2,661)	17,569
Inventory	(3,569)	2,615
Other assets	(244)	(4,268)
Contract costs, net	(6,467)	(8,129)
Accounts payable and other liabilities	6,358	(10,829)
Deferred revenue	4,068	8,253
Other	(15)	189
Net cash provided by operating activities	126,617	167,074
Cash flows from investing activities:
Capital expenditures	(38,749)	(113,289)
Proceeds from sale of business	18,795	24,179
Proceeds from sale of property, plant and equipment and other assets	18,178	5,071
Proceeds from insurance and other settlements	910	1,351
Net cash used in investing activities	(866)	(82,688)
Cash flows from financing activities:
Borrowings of long-term debt	343,251	722,500
Repayments of long-term debt	(419,751)	(762,500)
Payments for debt issuance costs	(2,407)	(943)
Payments for settlement of interest rate swaps that include financing elements	(2,169)	(787)
Dividends paid to stockholders	(44,486)	(44,347)
Net proceeds from issuance of common stock	3,401
Proceeds from stock issued under ESPP	371	367
Purchases of treasury stock	(1,746)	(834)
Contribution from Exterran Corporation		678
Net cash used in financing activities	(123,536)	(85,866)
Net increase (decrease) in cash and cash equivalents	2,215	(1,480)
Cash and cash equivalents, beginning of period	1,097	3,685
Cash and cash equivalents, end of period	$ 3,312	$ 2,205

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Organization and Basis of Presentation

6 Months Ended

Jun. 30, 2021

Description of Business and Basis of Presentation

Organization and Basis of Presentation

1. Description of Business and Basis of Presentation

We are an energy infrastructure company with a pure-play focus on midstream natural gas compression. We are the leading provider of natural gas compression services to customers in the oil and natural gas industry throughout the U.S. and a leading supplier of aftermarket services to customers that own compression equipment in the U.S. We operate in two business segments: contract operations and aftermarket services. Our predominant segment, contract operations, primarily includes designing, sourcing, owning, installing, operating, servicing, repairing and maintaining our owned fleet of natural gas compression equipment to provide natural gas compression services to our customers. In our aftermarket services business, we sell parts and components and provide operations, maintenance, overhaul and reconfiguration services to customers who own compression equipment.

The accompanying unaudited condensed consolidated financial statements included herein have been prepared in accordance with GAAP and the rules and regulations of the SEC. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP are not required in these interim financial statements and have been condensed or omitted. Management believes that the information furnished reflects all normal recurring adjustments necessary to fairly present our consolidated financial position, results of operations and cash flows for the periods indicated. The accompanying unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements presented in our 2020 Form 10-K, which contains a more comprehensive summary of our accounting policies. The interim results reported herein are not necessarily indicative of results for a full year. Certain prior year amounts have been reclassified to conform to the current year presentation.

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Recent Accounting Developments

6 Months Ended

Jun. 30, 2021

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Developments

2. Recent Accounting Developments

Accounting Standards Updates Implemented

Reference Rate Reform

On June 10, 2021, we prospectively adopted ASU 2020-04, which provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued as a result of reference rate reform. ASU 2020-04 is effective for all entities as of March 12, 2020 through December 31, 2022. Entities may elect to apply the amendments for contract modifications as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020. On June 10, 2021, we amended one of our interest rate swap agreements and determined that the modifications meet the criteria for the optional expedients and exceptions, which allow us to forego de-designation of the hedging relationship and to subsequently assess effectiveness on a qualitative basis. The adoption of ASU 2020-04 did not have a material impact on our consolidated financial statements. In the first quarter, we evaluated Amendment No. 3 to our Credit Facility and determined that ASU 2020-04 was not applicable. We will continue to assess any modifications to our interest rate swap and Credit Facility agreements during the effective period of this update and will apply the amendments as applicable.

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Business Transactions

6 Months Ended

Jun. 30, 2021

Business Transactions

Business Transactions

3. Business Transactions

February 2021 Disposition

On February 10, 2021, we completed the sale of certain contract operations customer service agreements and approximately 300 compressors, comprising approximately 40,000 horsepower, used to provide compression services under those agreements as well as other assets used to support the operations. We allocated customer-related and contract-based intangible assets based on a ratio of the horsepower sold relative to the total horsepower of the asset group. We recorded a gain on the sale of $6.0 million in (gain) loss on sale of assets, net in our condensed consolidated statements of operations during the six months ended June 30, 2021.

July 2020 Disposition

In July 2020, we completed the sale of the turbocharger business included within our aftermarket services segment. In connection with the sale, we entered into a supply agreement to purchase a minimum amount of turbocharger goods and services over a two-year term. In addition to cash of $9.5 million received upon closing, an additional $3.0 million was received on the first anniversary of the closing date in July 2021, and $3.5 million is being received through the purchase of turbocharger goods and services under the supply agreement. We received cash proceeds of $1.5 million and $0.7 million under the supply agreement during the six months ended June 30, 2021 and December 31, 2020, respectively.

March 2020 Disposition

In March 2020, we completed the sale of certain contract operations customer service agreements and approximately 200 compressors, comprising approximately 35,000 horsepower, used to provide compression services under those agreements as well as other assets used to support the operations. We allocated customer-related and contract-based intangible assets and goodwill based on a ratio of the horsepower sold relative to the total horsepower of the asset group. We recognized a gain on the sale of $3.2 million in (gain) loss on sale of assets, net in our condensed consolidated statements of operations during the six months ended June 30, 2020.

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Discontinued Operations

6 Months Ended

Jun. 30, 2021

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

4. Discontinued Operations

In 2015 we completed the Spin-off. In order to effect the Spin-off and govern our relationship with Exterran Corporation after the Spin-off, we entered into several agreements with Exterran Corporation, including a tax matters agreement, which governs the respective rights, responsibilities and obligations of Exterran Corporation and us with respect to certain tax matters.

As of each of June 30, 2021 and December 31, 2020, we had $7.9 million of unrecognized tax benefits (including interest and penalties) related to Exterran Corporation operations prior to the Spin-off recorded to noncurrent liabilities associated with discontinued operations in our condensed consolidated balance sheets. We had an offsetting indemnification asset of $7.9 million related to these unrecognized tax benefits recorded to noncurrent assets associated with discontinued operations as of each of June 30, 2021 and December 31, 2020.

The following table presents the balance sheets for our discontinued operations:

(in thousands)	June 30, 2021		December 31, 2020
Other assets	$	7,868	$	7,868
Deferred tax assets		2,556		3,168
Total assets associated with discontinued operations	$	10,424	$	11,036
Deferred tax liabilities	$	7,868	$	7,868
Total liabilities associated with discontinued operations	$	7,868	$	7,868

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Inventory

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Inventory

5. Inventory

(in thousands)	June 30, 2021		December 31, 2020
Parts and supplies	$	58,331	$	57,433
Work in progress		7,554		6,237
Inventory	$	65,885	$	63,670

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Property, Plant and Equipment, Net

6 Months Ended

Jun. 30, 2021

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

6. Property, Plant and Equipment, net

(in thousands)	June 30, 2021		December 31, 2020
Compression equipment, facilities and other fleet assets	$	3,384,406	$	3,439,432
Land and buildings		44,721		45,167
Transportation and shop equipment		101,115		106,868
Computer hardware and software		84,680		84,680
Other		21,429		14,457
Property, plant and equipment		3,636,351		3,690,604
Accumulated depreciation		(1,313,951)		(1,300,930)
Property, plant and equipment, net	$	2,322,400	$	2,389,674

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Goodwill

6 Months Ended

Jun. 30, 2021

Goodwill

Goodwill

7. Goodwill

Our goodwill was recognized in connection with the Elite Acquisition and represents the excess of consideration transferred over the fair value of the assets and liabilities acquired. All of the goodwill was allocated to our contract operations reporting unit. We review the carrying amount of our goodwill in the fourth quarter of every year, or whenever indicators of potential impairment exist, to determine if the carrying amount of our contract operations reporting unit exceeds its fair value, including the goodwill. Beginning in the first quarter of 2020, the COVID-19 pandemic caused a significant deterioration in global macroeconomic conditions, including a collapse in the demand for oil coupled with an oversupply of oil, which commenced substantial spending cuts by our customers and a decline in production. This global response to the pandemic significantly impacted our market capitalization and estimates of future revenues and cash flows, which triggered the need to perform a quantitative test of the fair value of our contract operations reporting unit as of March 31, 2020. The quantitative test determined that the carrying amount of our contract operations reporting unit exceeded its fair value and we recorded a goodwill impairment loss of $99.8 million during the first quarter of 2020.

Determining the fair value of a reporting unit is judgmental in nature and involves the use of significant estimates and assumptions, which have a significant impact on the fair value determined. We determined the fair value of our reporting unit using an equal weighting of both the expected present value of future cash flows and a market approach. The present value of future cash flows was estimated using our most recent forecast and the weighted average cost of capital. The market approach uses a market multiple on the earnings before interest expense, provision for income taxes and depreciation and amortization expense of comparable peer companies. Significant estimates for our reporting unit included in our impairment analysis were our cash flow forecasts, our estimate of the market’s weighted average cost of capital and market multiples.

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Hosting Arrangements

6 Months Ended

Jun. 30, 2021

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Hosting Arrangements

8. Hosting Arrangements

In the fourth quarter of 2018 we began a process and technology transformation project that will, among other things, upgrade or replace our existing ERP, supply chain and inventory management systems and expand the remote monitoring capabilities of our compression fleet. Included in this project are hosting arrangements that are service contracts related to the cloud migration of our ERP system and cloud services for our new mobile workforce, telematics and inventory management tools.

As of June 30, 2021 and December 31, 2020, we had $9.8 million and $7.7 million, respectively, of capitalized implementation costs related to our hosting arrangements that are service contracts included in other assets in our condensed consolidated balance sheets. Accumulated amortization was $0.5 million and $0.3 million at June 30, 2021 and December 31, 2020, respectively. We recorded $0.1 million of amortization expense to SG&A in our condensed consolidated statements of operations during each of the three months ended June 30, 2021 and 2020, and $0.2 million and $0.1 million during the six months ended June 30, 2021 and 2020, respectively.

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Long-Term Debt

6 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Long-Term Debt

9. Long-Term Debt

(in thousands)	June 30, 2021		December 31, 2020
Credit Facility	$	316,500	$	393,000
2028 Notes
Principal		800,000		800,000
Debt premium, net of amortization		13,539		14,541
Deferred financing costs, net of amortization		(11,192)		(11,766)
		802,347		802,775
2027 Notes
Principal		500,000		500,000
Deferred financing costs, net of amortization		(6,357)		(6,908)
		493,643		493,092
Long-term debt	$	1,612,490	$	1,688,867

Credit Facility

As of June 30, 2021, there were $12.5 million letters of credit outstanding under the Credit Facility and the applicable margin on borrowings outstanding was 2.4%. The weighted average annual interest rate on the outstanding balance under the Credit Facility, excluding the effect of interest rate swaps, was 2.5% and 2.7% at June 30, 2021 and December 31, 2020, respectively. We incurred $0.4 million in commitment fees on the daily unused amount of the Credit Facility during each of the three months ended June 30, 2021 and 2020 and $1.0 million and $1.1 million during the six months ended June 30, 2021 and 2020, respectively.

We must maintain certain consolidated financial ratios as defined in our Credit Facility agreement (see below). As of June 30, 2021, the ratio requirements did not constrain our undrawn capacity and as such, $421.0 million was available for additional borrowings. As of June 30, 2021, we were in compliance with all covenants under the Credit Facility agreement.

Amendment No. 3

On February 22, 2021, we amended our Credit Facility to, among other things:

● reduce the aggregate revolving commitment from $1.25 billion to $750.0 million, and

● adjust the maximum Senior Secured Debt to EBITDA and Total Debt to EBITDA ratios, as defined in the Credit Facility agreement, to the following:

Senior Secured Debt to EBITDA	3.00 to 1.0
Total Debt to EBITDA
Through fiscal year 2022	5.75 to 1.0
January 1, 2023 through September 30, 2023	5.50 to 1.0
Thereafter (1)	5.25 to 1.0

(1) Subject to a temporary increase to 5.50 to 1.0 for any quarter during which an acquisition satisfying certain thresholds is completed and for the two quarters immediately following such quarter.

We incurred $1.8 million in transaction costs related to Amendment No. 3, which were included in other assets in our condensed consolidated balance sheets and are being amortized over the remaining term of the Credit Facility. In addition, we wrote off $4.9 million of unamortized deferred financing costs as a result of the amendment, which was recorded to interest expense in our condensed consolidated statements of operations during the six months ended June 30, 2021.

2022 Notes Redemption

In April 2020, the 2022 Notes were redeemed at 100% of their $350.0 million aggregate principal amount plus accrued and unpaid interest of $10.5 million with borrowings under the Credit Facility. A debt extinguishment loss of $4.0 million related to the redemption was recognized during the three and six months ended June 30, 2020.

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Accumulated Other Comprehensive Loss

6 Months Ended

Jun. 30, 2021

Accumulated Other Comprehensive Income (Loss).

Accumulated Other Comprehensive Income (Loss)

10. Accumulated Other Comprehensive Loss

Components of comprehensive income (loss) are net income (loss) and all changes in equity during a period except those resulting from transactions with owners. Our accumulated other comprehensive income (loss) consists of changes in the fair value of our interest rate swap derivative instruments, net of tax, which are designated as cash flow hedges.

The following table presents the changes in accumulated other comprehensive loss of our derivative cash flow hedges, net of tax:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Beginning accumulated other comprehensive loss	$	(4,010)	$	(7,173)	$	(5,006)	$	(1,387)
Other comprehensive income (loss), net of tax:
Loss recognized in other comprehensive income (loss), net of tax benefit of $16, $155, $18 and $1,745, respectively		(63)		(583)		(71)		(6,566)
Loss reclassified from accumulated other comprehensive loss to interest expense, net of tax benefit of $273, $225, $540 and $277, respectively		1,029		848		2,033		1,045
Total other comprehensive income (loss)		966		265		1,962		(5,521)
Ending accumulated other comprehensive loss	$	(3,044)	$	(6,908)	$	(3,044)	$	(6,908)

See Note 17 (“Derivatives”) for further details on our interest rate swap derivative instruments.

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Equity

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Equity

11. Equity

At-the-Market Continuous Equity Offering Program

On February 23, 2021, we entered into the ATM Agreement, pursuant to which we may offer and sell shares of our common stock from time to time for an aggregate offering price of up to $50.0 million. We intend to use the net proceeds of these offerings, after deducting sales agent fees and offering expenses, for general corporate purposes. Offerings of common stock pursuant to the ATM Agreement will terminate upon the earlier of (i) the sale of all shares of common stock subject to the ATM Agreement or (ii) the termination of the ATM Agreement by us or by each of the sales agents. Any sales agent may also terminate the ATM Agreement but only with respect to itself.

During the six months ended June 30, 2021, we sold 357,148 shares of common stock for net proceeds of $3.4 million pursuant to the ATM Agreement.

Cash Dividends

The following table summarizes our dividends declared and paid in each of the quarterly periods of 2021 and 2020:

	Declared Dividends		Dividends Paid
	per Common Share		(in thousands)
2021
Q2	$	0.145	$	22,331
Q1		0.145		22,155
2020
Q4	$	0.145	$	22,177
Q3		0.145		22,308
Q2		0.145		22,176
Q1		0.145		22,171

On July 28, 2021, our Board of Directors declared a quarterly dividend of $0.145 per share of common stock to be paid on August 16, 2021 to stockholders of record at the close of business on August 9, 2021.

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Revenue from Contract with Customers

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

12. Revenue from Contracts with Customers

The following table presents our revenue from contracts with customers by segment (see Note 22 (“Segments”)) and disaggregated by revenue source:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Contract operations:
0 ― 1,000 horsepower per unit	$	45,918	$	57,728	$	92,837	$	124,468
1,001 ― 1,500 horsepower per unit		66,852		78,026		135,316		162,878
Over 1,500 horsepower per unit		50,939		51,618		101,342		106,209
Other (1)		156		577		404		1,368
Total contract operations revenue (2)		163,865		187,949		329,899		394,923
Aftermarket services:
Services		17,008		19,081		33,900		44,531
OTC parts and components sales		14,742		13,286		27,247		30,559
Total aftermarket services revenue (3)		31,750		32,367		61,147		75,090
Total revenue	$	195,615	$	220,316	$	391,046	$	470,013

(1) Primarily relates to fees associated with owned non-compression equipment.

(2) Includes $1.4 million and $1.5 million for the three months ended June 30, 2021 and 2020, respectively, and $2.4 million and $3.1 million for the six months ended June 30, 2021 and 2020, respectively, related to billable maintenance on owned compressors that was recognized at a point in time. All other contract operations revenue is recognized over time.

(3) All services revenue within aftermarket services is recognized over time. All OTC parts and components sales revenue is recognized at a point in time.

Performance Obligations

As of June 30, 2021, we had $286.6 million of remaining performance obligations related to our contract operations segment, which will be recognized through 2025 as follows:

(in thousands)	2021		2022		2023		2024		2025		Total
Remaining performance obligations	$	155,764	$	106,352	$	20,785	$	3,512	$	144	$	286,557

We do not disclose the aggregate transaction price for the remaining performance obligations for aftermarket services as there are no contracts with customers with an original contract term that is greater than one year.

Contract Assets and Liabilities

Contract Assets

As of June 30, 2021 and December 31, 2020, our receivables from contracts with customers, net of allowance for credit losses, were $96.0 million and $95.6 million, respectively.

Allowance for Credit Losses

Trade accounts receivable are due from companies of varying size engaged principally in oil and natural gas activities throughout the U.S. We review the financial condition of customers prior to extending credit and generally do not obtain collateral for trade receivables. Payment terms are on a short-term basis and in accordance with industry practice. We consider this credit risk to be limited due to these companies’ financial resources, the nature of the products and services we provide and the terms of our customer agreements.

Due to the short-term nature of our trade receivables, we consider the amortized cost to be the same as the carrying amount of the receivable, excluding the allowance for credit losses. We recognize an allowance for credit losses when a receivable is recorded, even when the risk of loss is remote. We utilize an aging schedule to determine our allowance for credit losses and measure expected credit losses on a collective (pool) basis when similar risk characteristics exist. We rely primarily on ratings assigned by external rating agencies and credit monitoring services to assess credit risk and aggregate customers first by low, medium or high risk asset pools, and then by delinquency status. We also consider the internal risk associated with geographic location and the services we provide to the customer when determining asset pools. If a customer does not share similar risk characteristics with other customers, we evaluate the customer’s outstanding trade receivables for expected credit losses on an individual basis. Trade receivables evaluated individually are not included in our collective assessment. Each reporting period, we reassess our customers’ risk profiles and determine the appropriate asset pool classification, or perform individual assessments of expected credit losses, based on the customers’ risk characteristics at the reporting date.

The contractual life of our trade receivables is primarily 30 days based on the payment terms specified in the contract. Contract operations services are generally billed monthly at the beginning of the month in which service is being provided. Aftermarket services billings typically occur when parts are delivered or service is completed. Loss rates are separately determined for each asset pool based on the length of time a trade receivable has been outstanding. We analyze two years of internal historical loss data, including the effects of prepayments, write-offs and subsequent recoveries, to determine our historical loss experience. Our historical loss information is a relevant data point for estimating credit losses, as the data closely aligns with trade receivables due from our customers. Ratings assigned by external rating agencies and credit monitoring services consider past performance and forecasts of future economic conditions in assessing credit risk. We routinely update our historical loss data to reflect our customers’ current risk profile, to ensure the historical data and loss rates are relevant to the pool of assets for which we are estimating expected credit losses.

Our allowance for credit losses balance changed as follows during the six months ended June 30, 2021:

(in thousands)
Balance at December 31, 2020	$	3,370
Provision for (benefit from) credit losses		(215)
Write-offs charged against allowance		(424)
Balance at June 30, 2021	$	2,731

Contract Liabilities

Freight billings to customers for the transport of compression assets, customer-specified modifications of compression assets and milestone billings on aftermarket services often result in a contract liability. As of June 30, 2021 and December 31, 2020, our contract liabilities were $3.6 million and $4.6 million, respectively, which were included in deferred revenue and other liabilities in our condensed consolidated balance sheets. The decrease in the contract liability balance during the six months ended June 30, 2021 was primarily due to $5.0 million recognized as revenue during the period, partially offset by revenue deferral of $4.1 million, each primarily related to freight billings and milestone billings on aftermarket services.

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Long-Lived and Other Asset Impairment

6 Months Ended

Jun. 30, 2021

Long-Lived and Other Asset Impairment

Long-Lived and Other Asset Impairment

13. Long-Lived and Other Asset Impairment

We review long-lived assets, including property, plant and equipment and identifiable intangibles that are being amortized, for impairment whenever events or changes in circumstances, including the removal of compressors from our active fleet, indicate that the carrying amount of an asset may not be recoverable.

In the first quarter of 2020, we determined that the impairment of our contract operations reporting unit’s goodwill was an indicator of potential impairment of the carrying amount of our long-lived assets, including our compressor fleet and associated customer and contract-based intangible assets. Accordingly, we performed a quantitative impairment test of our long-lived assets, by which we determined that they were not also impaired. No similar impairment has been indicated subsequent to the first quarter of 2020.

Compression Fleet

We periodically review the future deployment of our idle compression assets for units that are not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. Based on these reviews, we determine that certain idle compressors should be retired from the active fleet. The retirement of these units from the active fleet triggers a review of these assets for impairment and as a result of our review, we may record an asset impairment to reduce the book value of each unit to its estimated fair value. The fair value of each unit is estimated based on the expected net sale proceeds compared to other fleet units we recently sold, a review of other units recently offered for sale by third parties or the estimated component value of the equipment we plan to use.

In connection with our review of our idle compression assets, we evaluate for impairment idle units that were culled from our fleet in prior years and are available for sale. Based on that review, we may reduce the expected proceeds from disposition and record additional impairment to reduce the book value of each unit to its estimated fair value.

The following table presents the results of our compression fleet impairment review as recorded to our contract operations segment:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(dollars in thousands)	2021		2020		2021		2020
Idle compressors retired from the active fleet		45		450		115		535
Horsepower of idle compressors retired from the active fleet		13,000		184,000		37,000		207,000
Impairment recorded on idle compressors retired from the active fleet	$	2,832	$	55,210	$	9,844	$	61,405

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Restructuring Charges

6 Months Ended

Jun. 30, 2021

Restructuring Charges

Restructuring Charges

14. Restructuring Charges

During the first quarter of 2020, we completed restructuring activities to further streamline our organization and more fully align our teams to improve our customer service and profitability. We incurred severance costs of $1.7 million related to these activities during the first quarter of 2020. No additional costs will be incurred for this organizational restructuring.

In response to the decreased activity level of our customers that resulted from the COVID-19 pandemic beginning in the second quarter of 2020, we have incurred severance costs of $6.8 million to right-size our business. We do not expect to incur additional material severance costs under this restructuring plan.

During the third quarter of 2020, a plan to dispose of certain non-core properties was approved by management. We have incurred $1.5 million of restructuring costs as a result of our property disposals and do not expect to incur additional material property disposal costs under this restructuring plan.

The severance and property disposal costs incurred under the above restructuring plans were recorded to restructuring charges in our condensed consolidated statements of operations.

The following table presents restructuring charges incurred by segment:

	Contract		Aftermarket
(in thousands)	Operations		Services		Other (1)		Total
Three months ended June 30, 2021
Pandemic restructuring	$	337	$	121	$	147	$	605
Property restructuring		—		—		7		7
Other restructuring		—		—		131		131
Total restructuring charges	$	337	$	121	$	285	$	743
Three months ended June 30, 2020
Pandemic restructuring	$	1,386	$	286	$	736	$	2,408
Six months ended June 30, 2021
Pandemic restructuring	$	616	$	145	$	732	$	1,493
Property restructuring		—		—		16		16
Other restructuring		—		—		131		131
Total restructuring charges	$	616	$	145	$	879	$	1,640
Six months ended June 30, 2020
Organizational restructuring	$	478	$	625	$	625	$	1,728
Pandemic restructuring		1,386		286		736		2,408
Total restructuring charges	$	1,864	$	911	$	1,361	$	4,136

(1) Represents expense incurred within our corporate function and not directly attributable to our segments.

The following table presents restructuring charges incurred by cost type:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Severance costs
Organizational restructuring	$	—	$	—	$	—	$	1,728
Pandemic restructuring		605		2,408		1,493		2,408
Total severance costs		605		2,408		1,493		4,136
Property disposal costs
Impairment loss		—		—		9		—
Other exit costs		7		—		7		—
Total property disposal costs		7		—		16		—
Other restructuring costs		131		—		131		—
Total restructuring charges	$	743	$	2,408	$	1,640	$	4,136

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Income Taxes

6 Months Ended

Jun. 30, 2021

Income Taxes

Income Taxes

15. Income Taxes

Valuation Allowance

The amount of our deferred tax assets considered realizable could be adjusted if projections of future taxable income are reduced or objective negative evidence in the form of a three-year cumulative loss is present or both. Should we no longer have a level of sustained profitability, excluding nonrecurring charges, we will have to rely more on our future projections of taxable income to determine if we have an adequate source of taxable income for the realization of our deferred tax assets, namely net operating loss carryforwards and tax credit carryforwards. This may result in the need to record a valuation allowance against all or a portion of our deferred tax assets.

Effective Tax Rate

The year-to-date effective tax rate for the six months ended June 30, 2021 differed significantly from our statutory rate primarily due to unrecognized tax benefits and the limitation on executive compensation.

Unrecognized Tax Benefits

As of June 30, 2021, we believe it is reasonably possible that $2.8 million of our unrecognized tax benefits, including penalties, interest and discontinued operations, will be reduced prior to June 30, 2022 due to the settlement of audits or the expiration of statutes of limitations or both. However, due to the uncertain and complex application of the tax regulations, it is possible that the ultimate resolution of these matters may result in liabilities that could materially differ from this estimate.

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Earnings Per Share

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Earnings Per Share

16. Earnings per Share

Basic net income (loss) per common share is computed using the two-class method, which is an earnings allocation formula that determines net income (loss) per share for each class of common stock and participating security according to dividends declared and participation rights in undistributed earnings. Under the two-class method, basic net income (loss) per common share is determined by dividing net income (loss), after deducting amounts allocated to participating securities, by the weighted average number of common shares outstanding for the period. Participating securities include unvested restricted stock and stock-settled restricted stock units that have nonforfeitable rights to receive dividends or dividend equivalents, whether paid or unpaid. During periods of net loss, only distributed earnings (dividends) are allocated to participating securities, as participating securities do not have a contractual obligation to participate in our undistributed losses.

Diluted net income (loss) per common share is computed using the weighted average number of shares outstanding adjusted for the incremental common stock equivalents attributed to outstanding options, performance-based restricted stock units and stock to be issued pursuant to our ESPP unless their effect would be anti-dilutive.

The following table shows the calculation for net income (loss) attributable to common stockholders, which is used in the calculation of basic and diluted net income (loss) per common share:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Net income (loss)	$	8,752	$	(30,381)	$	12,921	$	(91,568)
Less: Earnings attributable to participating securities		(285)		(321)		(454)		(643)
Net income (loss) attributable to common stockholders	$	8,467	$	(30,702)	$	12,467	$	(92,211)

The following table shows the potential shares of common stock that were included in computing diluted net income (loss) per common share:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
(in thousands)	2021	2020	2021	2020
Weighted average common shares outstanding including participating securities	154,047	152,937	153,334	152,750
Less: Weighted average participating securities outstanding	(2,014)	(2,194)	(1,797)	(2,122)
Weighted average common shares outstanding used in basic net income (loss) per common share	152,033	150,743	151,537	150,628
Net dilutive potential common shares issuable:
On exercise of options and vesting of performance-based restricted stock units	169	—	159	—
On settlement of ESPP shares	1	—	3	—
Weighted average common shares outstanding used in diluted net income (loss) per common share	152,203	150,743	151,699	150,628

The following table shows the potential shares of common stock issuable that were excluded from computing diluted net income (loss) per common share as their inclusion would have been anti-dilutive:

	Three Months Ended		Six Months Ended
	June 30,		June 30,
(in thousands)	2021	2020	2021	2020
On exercise of options where exercise price is greater than average market value for the period	22	95	33	111
On exercise of options and vesting of performance-based restricted stock units	—	57	—	57
On settlement of ESPP shares	—	22	—	25
Net dilutive potential common shares issuable	22	174	33	193

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Derivatives

6 Months Ended

Jun. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

17. Derivatives

We are exposed to market risks associated with changes in the variable interest rate of our Credit Facility. We use derivative instruments to manage our exposure to fluctuations in this variable interest rate and thereby minimize the risks and costs associated with financial activities. We do not use derivative instruments for trading or other speculative purposes.

As of June 30, 2021, we had $300.0 million notional value of interest rate swaps outstanding, which expire in March 2022 and were entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates. The counterparties to these derivative agreements are major financial institutions. We monitor the credit quality of these financial institutions and do not expect nonperformance by any counterparty, although such nonperformance could have a material adverse effect on us. We have no collateral posted for our derivative instruments.

We have designated our interest rate swaps as cash flow hedging instruments. Changes in the fair value of cash flow hedging instruments are recognized as a component of other comprehensive income (loss) until the hedged transaction affects earnings. At that time, amounts are reclassified into earnings to interest expense, the same statement of operations line item to which the earnings effect of the hedged item is recorded. Cash flows from derivatives designated as hedges are classified in our condensed consolidated statements of cash flows under the same category as the cash flows from the underlying assets, liabilities or anticipated transactions unless the derivative contract contains a significant financing element, in which case, the cash settlements for these derivatives are classified as cash flows from financing activities.

We expect the hedging relationship to be highly effective as the interest rate swap terms substantially coincide with the hedged item and are expected to offset changes in expected cash flows due to fluctuations in the variable rate. We estimate that $3.9 million of the deferred pre-tax loss attributable to interest rate swaps included in accumulated other comprehensive loss at June 30, 2021 will be reclassified into earnings as interest expense at then-current values during the next 12 months as the underlying hedged transactions occur.

As of June 30, 2021, the weighted average effective fixed interest rate of our interest rate swaps was 1.8%.

The following table presents the effect of our derivative instruments designated as cash flow hedging instruments on our condensed consolidated balance sheets:

(in thousands)	June 30, 2021		December 31, 2020
Accrued liabilities	$	3,853	$	4,810
Other liabilities		—		1,527
Total derivative liabilities	$	3,853	$	6,337

The following table presents the effect of our derivative instruments designated as cash flow hedging instruments on our condensed consolidated statements of operations:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Pre-tax loss recognized in other comprehensive income (loss)	$	(79)	$	(738)	$	(89)	$	(8,311)
Pre-tax loss reclassified from accumulated other comprehensive loss into interest expense		(1,302)		(1,073)		(2,573)		(1,322)
Total amount of interest expense in which the effects of cash flow hedges are recorded		25,958		25,778		57,203		55,443

See Note 10 (“Accumulated Other Comprehensive Loss”) and Note 18 (“Fair Value Measurements”) for further details on our derivative instruments.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value Measurements

18. Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

On a quarterly basis, our interest rate swap derivative instruments are valued based on the income approach (discounted cash flow) using market observable inputs, including LIBOR forward curves. These fair value measurements are classified as Level 2. The following table presents our derivative position measured at fair value on a recurring basis, with pricing levels as of the date of valuation:

(in thousands)	June 30, 2021		December 31, 2020
Derivative liability	$	3,853	$	6,337

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

Goodwill

In the first quarter of 2020, we determined that the significant deterioration in global macroeconomic conditions caused by the COVID-19 pandemic was an indicator of potential impairment of our goodwill, and we performed a quantitative impairment test as of March 31, 2020 that resulted in a $99.8 million impairment of our goodwill. Significant estimates used in our impairment analysis included cash flow forecasts, our estimate of the market’s weighted average cost of capital and market multiples, which are Level 3 inputs. See Note 7 (“Goodwill”) for further details of the valuation methodology used in connection with the goodwill impairment.

Compressors

During the six months ended June 30, 2021, we recorded nonrecurring fair value measurements related to our idle and previously-culled compressors. Our estimate of the compressors’ fair value was primarily based on the expected net sale proceeds compared to other fleet units we recently sold and/or a review of other units recently offered for sale by third parties, or the estimated component value of the equipment we plan to use. We discounted the expected proceeds, net of selling and other carrying costs, using a weighted average disposal period of four years. These fair value measurements are classified as Level 3. The following table presents the fair value of our compressors impaired during 2021 and 2020:

(in thousands)	June 30, 2021		December 31, 2020
Impaired compressors	$	3,462	$	19,046

The significant unobservable inputs used to develop the above fair value measurements were weighted by the relative fair value of the compressors being measured. Additional quantitative information related to our significant unobservable inputs follows:

	Range	Weighted Average (1)
Estimated net sale proceeds:
As of June 30, 2021	$0 - $621 per horsepower	$30 per horsepower
As of December 31, 2020	$0 - $289 per horsepower	$20 per horsepower

(1) Calculated based on an estimated discount for market liquidity of 70% and 81% as of June 30, 2021 and December 31, 2020, respectively.

See Note 13 (“Long-Lived and Other Asset Impairment”) for further details.

Other Financial Instruments

The carrying amounts of our cash, receivables and payables approximate fair value due to the short-term nature of those instruments.

The carrying amount of borrowings outstanding under our Credit Facility approximates fair value due to its variable interest rate. The fair value of these outstanding borrowings is a Level 3 measurement.

The fair value of our fixed rate debt is estimated using yields observable in active markets, which are Level 2 inputs, and was as follows:

(in thousands)	June 30, 2021		December 31, 2020
Carrying amount of fixed rate debt (1)	$	1,295,990	$	1,295,867
Fair value of fixed rate debt		1,366,000		1,371,000

(1) Carrying amounts are shown net of unamortized debt premium and unamortized deferred financing costs. See Note 9 (“Long-Term Debt”).

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation

19. Stock-Based Compensation

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Equity award expense	$	3,178	$	2,772	$	5,841	$	5,778
Liability award expense		408		842		994		294
Total stock-based compensation expense	$	3,586	$	3,614	$	6,835	$	6,072

The following table presents the activity of our stock-settled restricted stock awards, restricted stock units and performance-based restricted stock units and our cash-settled performance-based restricted stock units during the six months ended June 30, 2021:

		Weighted
		Average
		Grant Date
		Fair Value
(shares in thousands)	Shares	Per Share
Non-vested, December 31, 2020	2,446	$	9.69
Granted	1,279		11.22
Vested	(620)		9.36
Canceled	(41)		9.82
Non-vested, June 30, 2021 (1)	3,064		10.39

(1) Comprised of 611 cash-settled units and 2,453 stock-settled awards and units.

As of June 30, 2021, we expect $20.0 million of unrecognized compensation cost related to our non-vested awards and units to be recognized over the weighted average period of 2.0 years.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2021

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

20. Commitments and Contingencies

Performance Bonds

In the normal course of business we have issued performance bonds to various state authorities that ensure payment of certain obligations. We have also issued a bond to protect our 401(k) retirement plan against losses caused by acts of fraud or dishonesty. The bonds have expiration dates in 2021 through the fourth quarter of 2022, and maximum potential future payments of $2.2 million. As of June 30, 2021, we were in compliance with all obligations to which the performance bonds pertain.

Tax Matters

We are subject to a number of state and local taxes that are not income-based. As many of these taxes are subject to audit by the taxing authorities, it is possible that an audit could result in additional taxes due. We accrue for such additional taxes when we determine that it is probable that we have incurred a liability and we can reasonably estimate the amount of the liability. As of June 30, 2021 and December 31, 2020, we accrued $5.4 million and $5.6 million, respectively, for the outcomes of non-income-based tax audits. We do not expect that the ultimate resolutions of these audits will result in a material variance from the amounts accrued. We do not accrue for unasserted claims for tax audits unless we believe the assertion of a claim is probable, it is probable that it will be determined that the claim is owed and we can reasonably estimate the claim or range of the claim. We believe the likelihood is remote that the impact of potential unasserted claims from non-income-based tax audits could be material to our consolidated financial position, but it is possible that the resolution of future audits could be material to our consolidated results of operations or cash flows.

Subject to the provisions of the tax matters agreement between Exterran Corporation and us, both parties agreed to indemnify the primary obligor of any return for tax periods beginning before and ending before or after the Spin-off (including any ongoing or future amendments and audits for these returns) for the portion of the tax liability (including interest and penalties) that relates to their respective operations reported in the filing. The tax contingencies mentioned above relate to tax matters for which we are responsible in managing the audit. As of December 31, 2020, we had an indemnification liability (including penalties and interest), in addition to the tax contingency above, of $1.6 million for our share of non-income-based tax contingencies related to audits being managed by Exterran Corporation. During the six months ended June 30, 2021, these audits were settled and our indemnification liability was reduced to zero.

Insurance Matters

Our business can be hazardous, involving unforeseen circumstances such as uncontrollable flows of natural gas or well fluids and fires or explosions. As is customary in our industry, we review our safety equipment and procedures and carry insurance against some, but not all, risks of our business. Our insurance coverage includes property damage, general liability and commercial automobile liability and other coverage we believe is appropriate. We believe that our insurance coverage is customary for the industry and adequate for our business; however, losses and liabilities not covered by insurance would increase our costs.

Additionally, we are substantially self-insured for workers’ compensation and employee group health claims in view of the relatively high per-incident deductibles we absorb under our insurance arrangements for these risks. Losses up to the deductible amounts are estimated and accrued based upon known facts, historical trends and industry averages. We are also self-insured for property damage to our offshore assets.

Litigation and Claims

In the ordinary course of business, we are involved in various pending or threatened legal actions. While we are unable to predict the ultimate outcome of these actions, we believe that any ultimate liability arising from any of these actions will not have a material adverse effect on our consolidated financial position, results of operations or cash flows, including our ability to pay dividends. However, because of the inherent uncertainty of litigation and arbitration proceedings, we cannot provide assurance that the resolution of any particular claim or proceeding to which we are a party will not have a material adverse effect on our consolidated financial position, results of operations or cash flows, including our ability to pay dividends.

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Related Party Transactions

6 Months Ended

Jun. 30, 2021

Related Party Transactions [Abstract]

Related Party Transactions

21. Related Party Transactions

In connection with the closing of the Elite Acquisition, we issued 21.7 million shares of our common stock to JDH Capital, an affiliate of our customer Hilcorp. As long as JDH Capital, together with affiliates of Hilcorp, owns at least 7.5% of our outstanding common stock, it will have the right to designate one director to our Board of Directors. As of June 30, 2021, JDH Capital owned 11.1% of our outstanding common stock.

Jeffery D. Hildebrand, founder and executive chairman of Hilcorp, was appointed Director in August 2019 and served until his resignation on July 29, 2020, at which time Jason C. Rebrook, President of Hilcorp, was appointed Director to fill the resulting vacancy. Mr. Hildebrand did not receive compensation in his role as Director and Mr. Rebrook received no compensation in his role as Director in 2020. In December 2020, the Board of Directors voted to approve the payment of Director cash and equity compensation to Mr. Rebrook beginning in 2021.

Revenue from Hilcorp and affiliates was $9.6 million and $10.2 million during the three months ended June 30, 2021 and 2020, respectively, and $19.1 million and $20.8 million during the six months ended June 30, 2021 and 2020, respectively. Accounts receivable, net due from Hilcorp and affiliates was $4.4 million and $3.9 million as of June 30, 2021 and December 31, 2020, respectively.

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Segments

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Segments

22. Segments

We manage our business segments primarily based on the type of product or service provided. We have two segments which we operate within the U.S.: contract operations and aftermarket services. The contract operations segment primarily provides natural gas compression services to meet specific customer requirements. The aftermarket services segment provides a full range of services to support the compression needs of customers, from parts sales and normal maintenance services to full operation of a customer’s owned assets.

We evaluate the performance of our segments based on gross margin for each segment. Revenue includes only sales to external customers.

	Contract		Aftermarket
(in thousands)	Operations		Services		Total
Three months ended June 30, 2021
Revenue	$	163,865	$	31,750	$	195,615
Gross margin		102,478		4,260		106,738
Three months ended June 30, 2020
Revenue	$	187,949	$	32,367	$	220,316
Gross margin		124,559		3,681		128,240
Six months ended June 30, 2021
Revenue	$	329,899	$	61,147	$	391,046
Gross margin		207,147		7,874		215,021
Six months ended June 30, 2020
Revenue	$	394,923	$	75,090	$	470,013
Gross margin		252,882		11,413		264,295

The following table reconciles total gross margin to income (loss) before income taxes:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Total gross margin	$	106,738	$	128,240	$	215,021	$	264,295
Less:
Selling, general and administrative		26,077		28,745		51,161		59,371
Depreciation and amortization		44,193		48,849		89,905		98,671
Long-lived and other asset impairment		2,960		55,210		10,033		61,405
Goodwill impairment		—		—		—		99,830
Restructuring charges		743		2,408		1,640		4,136
Interest expense		25,958		25,778		57,203		55,443
Debt extinguishment loss		—		3,971		—		3,971
(Gain) loss on sale of assets, net		(3,124)		2,189		(14,156)		(1,927)
Other income, net		(82)		(438)		(1,971)		(993)
Income (loss) before income taxes	$	10,013	$	(38,472)	$	21,206	$	(115,612)

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Subsequent Events

6 Months Ended

Jun. 30, 2021

Subsequent Events

Subsequent Events

23. Subsequent Events

July 2021 Dispositions

In July 2021, we completed sales consisting of certain contract operations customer service agreements and approximately 575 compressors, comprising approximately 100,000 horsepower, used to provide compression services under those agreements, as well as other assets used to support the operations. We allocated customer-related and contract-based intangible assets based on a ratio of the horsepower sold relative to the total horsepower of the asset group. Total cash consideration for the sales will approximate $61.0 million and a gain on the sales of approximately $13.5 million will be recognized in the third quarter of 2021.

The proceeds received in July from the sales were used to repay borrowings outstanding under our Credit Facility. On July 1, 2021, we dedesignated $125.0 million notional value of our interest rate swaps. Amounts previously recognized in accumulated other comprehensive loss will remain there until the expected cash flows impact earnings or become probable of not occurring. Changes in the value of the dedesignated interest rate swaps will be recorded in earnings.

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Recent Accounting Developments (Policies)

6 Months Ended

Jun. 30, 2021

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Accounting Standards Updates Not Yet Implemented

Accounting Standards Updates Implemented

Reference Rate Reform

On June 10, 2021, we prospectively adopted ASU 2020-04, which provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions that reference LIBOR or another reference rate expected to be discontinued as a result of reference rate reform. ASU 2020-04 is effective for all entities as of March 12, 2020 through December 31, 2022. Entities may elect to apply the amendments for contract modifications as of any date from the beginning of an interim period that includes or is subsequent to March 12, 2020, or prospectively from a date within an interim period that includes or is subsequent to March 12, 2020. On June 10, 2021, we amended one of our interest rate swap agreements and determined that the modifications meet the criteria for the optional expedients and exceptions, which allow us to forego de-designation of the hedging relationship and to subsequently assess effectiveness on a qualitative basis. The adoption of ASU 2020-04 did not have a material impact on our consolidated financial statements. In the first quarter, we evaluated Amendment No. 3 to our Credit Facility and determined that ASU 2020-04 was not applicable. We will continue to assess any modifications to our interest rate swap and Credit Facility agreements during the effective period of this update and will apply the amendments as applicable.

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Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2021

Discontinued Operations and Disposal Groups [Abstract]

Summary of balance sheets and statements of operations for discontinued operations

(in thousands)	June 30, 2021		December 31, 2020
Other assets	$	7,868	$	7,868
Deferred tax assets		2,556		3,168
Total assets associated with discontinued operations	$	10,424	$	11,036
Deferred tax liabilities	$	7,868	$	7,868
Total liabilities associated with discontinued operations	$	7,868	$	7,868

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Inventory (Tables)

6 Months Ended

Jun. 30, 2021

Inventory Disclosure [Abstract]

Schedule of inventory, net of reserves

(in thousands)	June 30, 2021		December 31, 2020
Parts and supplies	$	58,331	$	57,433
Work in progress		7,554		6,237
Inventory	$	65,885	$	63,670

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Property, Plant and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2021

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment, net

(in thousands)	June 30, 2021		December 31, 2020
Compression equipment, facilities and other fleet assets	$	3,384,406	$	3,439,432
Land and buildings		44,721		45,167
Transportation and shop equipment		101,115		106,868
Computer hardware and software		84,680		84,680
Other		21,429		14,457
Property, plant and equipment		3,636,351		3,690,604
Accumulated depreciation		(1,313,951)		(1,300,930)
Property, plant and equipment, net	$	2,322,400	$	2,389,674

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Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2021

Debt Disclosure [Abstract]

Schedule of long-term debt

(in thousands)	June 30, 2021		December 31, 2020
Credit Facility	$	316,500	$	393,000
2028 Notes
Principal		800,000		800,000
Debt premium, net of amortization		13,539		14,541
Deferred financing costs, net of amortization		(11,192)		(11,766)
		802,347		802,775
2027 Notes
Principal		500,000		500,000
Deferred financing costs, net of amortization		(6,357)		(6,908)
		493,643		493,092
Long-term debt	$	1,612,490	$	1,688,867

Schedule of financial ratios to be maintained defined in Credit Facility agreement

Senior Secured Debt to EBITDA	3.00 to 1.0
Total Debt to EBITDA
Through fiscal year 2022	5.75 to 1.0
January 1, 2023 through September 30, 2023	5.50 to 1.0
Thereafter (1)	5.25 to 1.0

(1) Subject to a temporary increase to 5.50 to 1.0 for any quarter during which an acquisition satisfying certain thresholds is completed and for the two quarters immediately following such quarter.

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Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2021

Accumulated Other Comprehensive Income (Loss).

Schedule of Accumulated Other Comprehensive Income (Loss)

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Beginning accumulated other comprehensive loss	$	(4,010)	$	(7,173)	$	(5,006)	$	(1,387)
Other comprehensive income (loss), net of tax:
Loss recognized in other comprehensive income (loss), net of tax benefit of $16, $155, $18 and $1,745, respectively		(63)		(583)		(71)		(6,566)
Loss reclassified from accumulated other comprehensive loss to interest expense, net of tax benefit of $273, $225, $540 and $277, respectively		1,029		848		2,033		1,045
Total other comprehensive income (loss)		966		265		1,962		(5,521)
Ending accumulated other comprehensive loss	$	(3,044)	$	(6,908)	$	(3,044)	$	(6,908)

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Equity (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Summary of entity's dividends per common share

	Declared Dividends		Dividends Paid
	per Common Share		(in thousands)
2021
Q2	$	0.145	$	22,331
Q1		0.145		22,155
2020
Q4	$	0.145	$	22,177
Q3		0.145		22,308
Q2		0.145		22,176
Q1		0.145		22,171

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Revenue from Contract with Customers (Tables)

6 Months Ended

Jun. 30, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Contract operations:
0 ― 1,000 horsepower per unit	$	45,918	$	57,728	$	92,837	$	124,468
1,001 ― 1,500 horsepower per unit		66,852		78,026		135,316		162,878
Over 1,500 horsepower per unit		50,939		51,618		101,342		106,209
Other (1)		156		577		404		1,368
Total contract operations revenue (2)		163,865		187,949		329,899		394,923
Aftermarket services:
Services		17,008		19,081		33,900		44,531
OTC parts and components sales		14,742		13,286		27,247		30,559
Total aftermarket services revenue (3)		31,750		32,367		61,147		75,090
Total revenue	$	195,615	$	220,316	$	391,046	$	470,013

(1) Primarily relates to fees associated with owned non-compression equipment.

(2) Includes $1.4 million and $1.5 million for the three months ended June 30, 2021 and 2020, respectively, and $2.4 million and $3.1 million for the six months ended June 30, 2021 and 2020, respectively, related to billable maintenance on owned compressors that was recognized at a point in time. All other contract operations revenue is recognized over time.

(3) All services revenue within aftermarket services is recognized over time. All OTC parts and components sales revenue is recognized at a point in time.

Schedule of remaining Performance Obligation

(in thousands)	2021		2022		2023		2024		2025		Total
Remaining performance obligations	$	155,764	$	106,352	$	20,785	$	3,512	$	144	$	286,557

Summary of changes in the allowance for credit losses balance

(in thousands)
Balance at December 31, 2020	$	3,370
Provision for (benefit from) credit losses		(215)
Write-offs charged against allowance		(424)
Balance at June 30, 2021	$	2,731

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Long-Lived and Other Asset Impairment (Tables)

6 Months Ended

Jun. 30, 2021

Long-Lived and Other Asset Impairment

Schedule of impairment of long-lived assets

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(dollars in thousands)	2021		2020		2021		2020
Idle compressors retired from the active fleet		45		450		115		535
Horsepower of idle compressors retired from the active fleet		13,000		184,000		37,000		207,000
Impairment recorded on idle compressors retired from the active fleet	$	2,832	$	55,210	$	9,844	$	61,405

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Restructuring Charges (Tables)

6 Months Ended

Jun. 30, 2021

Restructuring Charges

Schedule of restructuring charges by segment

	Contract		Aftermarket
(in thousands)	Operations		Services		Other (1)		Total
Three months ended June 30, 2021
Pandemic restructuring	$	337	$	121	$	147	$	605
Property restructuring		—		—		7		7
Other restructuring		—		—		131		131
Total restructuring charges	$	337	$	121	$	285	$	743
Three months ended June 30, 2020
Pandemic restructuring	$	1,386	$	286	$	736	$	2,408
Six months ended June 30, 2021
Pandemic restructuring	$	616	$	145	$	732	$	1,493
Property restructuring		—		—		16		16
Other restructuring		—		—		131		131
Total restructuring charges	$	616	$	145	$	879	$	1,640
Six months ended June 30, 2020
Organizational restructuring	$	478	$	625	$	625	$	1,728
Pandemic restructuring		1,386		286		736		2,408
Total restructuring charges	$	1,864	$	911	$	1,361	$	4,136

(1) Represents expense incurred within our corporate function and not directly attributable to our segments.

Schedule of restructuring charges by type

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Severance costs
Organizational restructuring	$	—	$	—	$	—	$	1,728
Pandemic restructuring		605		2,408		1,493		2,408
Total severance costs		605		2,408		1,493		4,136
Property disposal costs
Impairment loss		—		—		9		—
Other exit costs		7		—		7		—
Total property disposal costs		7		—		16		—
Other restructuring costs		131		—		131		—
Total restructuring charges	$	743	$	2,408	$	1,640	$	4,136

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Summary of net income (loss) attributable to Archrock common stockholders used in the calculation of basic and diluted income (loss) per common share

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Net income (loss)	$	8,752	$	(30,381)	$	12,921	$	(91,568)
Less: Earnings attributable to participating securities		(285)		(321)		(454)		(643)
Net income (loss) attributable to common stockholders	$	8,467	$	(30,702)	$	12,467	$	(92,211)

Schedule of potential shares of common stock that were included in computing diluted income (loss) attributable to Archrock common stockholders per common share

	Three Months Ended		Six Months Ended
	June 30,		June 30,
(in thousands)	2021	2020	2021	2020
Weighted average common shares outstanding including participating securities	154,047	152,937	153,334	152,750
Less: Weighted average participating securities outstanding	(2,014)	(2,194)	(1,797)	(2,122)
Weighted average common shares outstanding used in basic net income (loss) per common share	152,033	150,743	151,537	150,628
Net dilutive potential common shares issuable:
On exercise of options and vesting of performance-based restricted stock units	169	—	159	—
On settlement of ESPP shares	1	—	3	—
Weighted average common shares outstanding used in diluted net income (loss) per common share	152,203	150,743	151,699	150,628

Schedule of potential shares of common stock issuable, excluded from computation of diluted income (loss), attributable to Archrock common stockholders per common share

	Three Months Ended		Six Months Ended
	June 30,		June 30,
(in thousands)	2021	2020	2021	2020
On exercise of options where exercise price is greater than average market value for the period	22	95	33	111
On exercise of options and vesting of performance-based restricted stock units	—	57	—	57
On settlement of ESPP shares	—	22	—	25
Net dilutive potential common shares issuable	22	174	33	193

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Derivatives (Tables)

6 Months Ended

Jun. 30, 2021

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of effect of derivative instruments on consolidated financial position

(in thousands)	June 30, 2021		December 31, 2020
Accrued liabilities	$	3,853	$	4,810
Other liabilities		—		1,527
Total derivative liabilities	$	3,853	$	6,337

Schedule of effect of derivative instruments on results of operations

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Pre-tax loss recognized in other comprehensive income (loss)	$	(79)	$	(738)	$	(89)	$	(8,311)
Pre-tax loss reclassified from accumulated other comprehensive loss into interest expense		(1,302)		(1,073)		(2,573)		(1,322)
Total amount of interest expense in which the effects of cash flow hedges are recorded		25,958		25,778		57,203		55,443

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2021

Fair value

Summary of assets and liabilities measured at fair value on recurring basis

(in thousands)	June 30, 2021		December 31, 2020
Derivative liability	$	3,853	$	6,337

Schedule of carrying value and estimated fair value of debt instruments

(in thousands)	June 30, 2021		December 31, 2020
Carrying amount of fixed rate debt (1)	$	1,295,990	$	1,295,867
Fair value of fixed rate debt		1,366,000		1,371,000

(1) Carrying amounts are shown net of unamortized debt premium and unamortized deferred financing costs. See Note 9 (“Long-Term Debt”).

Compressors

Fair value

Schedule of non-recurring fair value assets

(in thousands)	June 30, 2021		December 31, 2020
Impaired compressors	$	3,462	$	19,046

Schedule of additional quantitative information related to our significant unobservable inputs

	Range	Weighted Average (1)
Estimated net sale proceeds:
As of June 30, 2021	$0 - $621 per horsepower	$30 per horsepower
As of December 31, 2020	$0 - $289 per horsepower	$20 per horsepower

(1) Calculated based on an estimated discount for market liquidity of 70% and 81% as of June 30, 2021 and December 31, 2020, respectively.

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2021

Share-based Payment Arrangement [Abstract]

Schedule of allocated stock-based compensation

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Equity award expense	$	3,178	$	2,772	$	5,841	$	5,778
Liability award expense		408		842		994		294
Total stock-based compensation expense	$	3,586	$	3,614	$	6,835	$	6,072

Schedule of restricted stock, restricted stock unit, performance unit, cash settled restricted stock unit and cash settled performance unit activity

		Weighted
		Average
		Grant Date
		Fair Value
(shares in thousands)	Shares	Per Share
Non-vested, December 31, 2020	2,446	$	9.69
Granted	1,279		11.22
Vested	(620)		9.36
Canceled	(41)		9.82
Non-vested, June 30, 2021 (1)	3,064		10.39

(1) Comprised of 611 cash-settled units and 2,453 stock-settled awards and units.

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Segments (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Summary of revenue and other financial information by reportable segment

	Contract		Aftermarket
(in thousands)	Operations		Services		Total
Three months ended June 30, 2021
Revenue	$	163,865	$	31,750	$	195,615
Gross margin		102,478		4,260		106,738
Three months ended June 30, 2020
Revenue	$	187,949	$	32,367	$	220,316
Gross margin		124,559		3,681		128,240
Six months ended June 30, 2021
Revenue	$	329,899	$	61,147	$	391,046
Gross margin		207,147		7,874		215,021
Six months ended June 30, 2020
Revenue	$	394,923	$	75,090	$	470,013
Gross margin		252,882		11,413		264,295

Reconciliation of net income (loss) to gross margin

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in thousands)	2021		2020		2021		2020
Total gross margin	$	106,738	$	128,240	$	215,021	$	264,295
Less:
Selling, general and administrative		26,077		28,745		51,161		59,371
Depreciation and amortization		44,193		48,849		89,905		98,671
Long-lived and other asset impairment		2,960		55,210		10,033		61,405
Goodwill impairment		—		—		—		99,830
Restructuring charges		743		2,408		1,640		4,136
Interest expense		25,958		25,778		57,203		55,443
Debt extinguishment loss		—		3,971		—		3,971
(Gain) loss on sale of assets, net		(3,124)		2,189		(14,156)		(1,927)
Other income, net		(82)		(438)		(1,971)		(993)
Income (loss) before income taxes	$	10,013	$	(38,472)	$	21,206	$	(115,612)

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Description of Business and Basis of Presentation (Details)	6 Months Ended
	Jun. 30, 2021 segment
Description of Business and Basis of Presentation
Number of reportable segments	2

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Business Transactions (Details) hp in Thousands, $ in Thousands		1 Months Ended			6 Months Ended
	Feb. 10, 2021 hp CompressorUnit	Jul. 30, 2021 USD ($)	Jul. 31, 2020 USD ($)	Mar. 31, 2020 hp CompressorUnit	Jun. 30, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)
Transactions
Gain on disposition					$ 5,995		$ 3,172
Proceeds from sale					18,178		5,071
Disposed of by Sale | February 2021 Disposition
Transactions
Number of compressors | CompressorUnit	300
Compressor units horsepower (horsepower) | hp	40
Gain on disposition					6,000
Disposed of by Sale | July 2020 Disposition
Transactions
Disposal Group, Not Discontinued Operation, Name of Segment [Extensible List]			Aftermarket Services
Cash consideration received upon closing			$ 9,500
Amount of consideration receivable as credit for purchases			$ 3,500
Cash received under supply agreement					$ 1,500	$ 700
Disposed of by Sale | July 2020 Disposition | Subsequent Event
Transactions
Cash consideration received on first anniversary of closing		$ 3,000
Disposed of by Sale | March 2020 Disposition
Transactions
Number of compressors | CompressorUnit				200
Compressor units horsepower (horsepower) | hp				35
Gain on disposition							$ 3,200
Turbocharger goods and services | July 2020 Disposition
Transactions
Term of supply agreement			2 years

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Discontinued Operations - Description (Details) - Exterran Corporation - Spinoff - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Discontinued Operations
Deferred tax liabilities	$ 7,868	$ 7,868
Indemnification asset	$ 7,868	$ 7,868

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Discontinued Operations - Balance Sheet Data for Discontinued Operations (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Summary of balance sheet data for discontinued operations
Total assets associated with discontinued operations	$ 10,424	$ 11,036
Total liabilities associated with discontinued operations	7,868	7,868
Spinoff | Exterran Corporation
Summary of balance sheet data for discontinued operations
Other assets	7,868	7,868
Deferred tax assets	2,556	3,168
Total assets associated with discontinued operations	10,424	11,036
Deferred tax liabilities	7,868	7,868
Total liabilities associated with discontinued operations	$ 7,868	$ 7,868

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Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Composition of Inventory net of reserves
Parts and supplies	$ 58,331	$ 57,433
Work in progress	7,554	6,237
Inventory	$ 65,885	$ 63,670

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Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment
Property, plant and equipment, gross	$ 3,636,351	$ 3,690,604
Accumulated depreciation	(1,313,951)	(1,300,930)
Property, plant and equipment, net	2,322,400	2,389,674
Compression equipment, facilities and other fleet assets
Property, Plant and Equipment
Property, plant and equipment, gross	3,384,406	3,439,432
Land and buildings
Property, Plant and Equipment
Property, plant and equipment, gross	44,721	45,167
Transportation and shop equipment
Property, Plant and Equipment
Property, plant and equipment, gross	101,115	106,868
Computer hardware and software
Property, Plant and Equipment
Property, plant and equipment, gross	84,680	84,680
Other property, plant and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	$ 21,429	$ 14,457

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Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020	Jun. 30, 2020
Change in the carrying value of goodwill
Goodwill impairment	$ 99,800	$ 99,830

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Hosting Arrangements (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Hosting arrangements, Capitalized costs	$ 9.8		$ 9.8		$ 7.7
Hosting arrangements, Accumulated amortization	0.5		0.5		$ 0.3
Hosting arrangements, Amortization	$ 0.1	$ 0.1	$ 0.2	$ 0.1

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Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Debt Instruments
Long-term debt	$ 1,612,490	$ 1,688,867
Credit Facility
Debt Instruments
Long-term debt	316,500	393,000
2028 Notes
Debt Instruments
Long term debt gross	800,000	800,000
Debt premium, net of amortization	13,539	14,541
Deferred financing costs, net of amortization	(11,192)	(11,766)
Long-term debt	802,347	802,775
2027 Notes
Debt Instruments
Long term debt gross	500,000	500,000
Deferred financing costs, net of amortization	(6,357)	(6,908)
Long-term debt	$ 493,643	$ 493,092

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Long-Term Debt - Credit Facility (Details) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended	13 Months Ended	22 Months Ended	45 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Sep. 30, 2023	Nov. 08, 2024	Dec. 31, 2022	Nov. 08, 2024	Feb. 22, 2021 USD ($)	Dec. 31, 2020 USD ($)
Credit Facility
Line of Credit Facility
Letter of credit outstanding	$ 12.5		$ 12.5
Debt instrument, variable rate (percentage)			2.40%
Debt instrument weighted average interest rate (percent)	2.50%		2.50%							2.70%
Commitment fee amount	$ 0.4	$ 0.4	$ 1.0	$ 1.1
Undrawn capacity under revolving credit facility	421.0		421.0
Maximum borrowing capacity									$ 750.0	$ 1,250.0
Debt issuance cost written off			4.9
Credit Facility, Amendment 3
Line of Credit Facility
Transaction costs	$ 1.8		$ 1.8
Forecasted | Credit Facility
Line of Credit Facility
Senior Secured Debt to EBITDA								3.00
Total Debt to EBITDA ratio					5.50	5.25	5.75
Total debt to EBITDA ratio in period which an acquisition is completed and for two quarters following such quarter						5.50

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Long-Term Debt - 2022 Notes Redemption (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	6 Months Ended
	Apr. 30, 2020	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Instruments
Redemption rate (as a percent)	100.00%
Repayments of long-term debt			$ 419,751	$ 762,500
Debt extinguishment loss		$ 3,971		$ 3,971
2022 Notes
Debt Instruments
Repayments of long-term debt	$ 350,000
Interest paid	10,500
Debt extinguishment loss	$ 4,000

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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Increase (Decrease) in Stockholders' Equity
Beginning balance	$ 923,124	$ 999,472	$ 935,557	$ 1,085,963
Other comprehensive income (loss), net of tax:
Total other comprehensive income (loss), net of tax	966	265	1,962	(5,521)
Ending balance	913,821	950,873	913,821	950,873
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity
Beginning balance	(4,010)	(7,173)	(5,006)	(1,387)
Other comprehensive income (loss), net of tax:
Gain (loss) recognized in other comprehensive income (loss), net of tax expense (benefit)	(63)	(583)	(71)	(6,566)
(Gain) loss reclassified from accumulated other comprehensive loss to interest expense, net of tax (expense) benefit	1,029	848	2,033	1,045
Total other comprehensive income (loss), net of tax	966	265	1,962	(5,521)
Ending balance	(3,044)	(6,908)	(3,044)	(6,908)
Gain (loss) recognized in other comprehensive income, tax expense (benefit)	(16)	(155)	(18)	(1,745)
(Gain) loss reclassified from accumulated other comprehensive loss, tax (expense) benefit	$ 273	$ 225	$ 540	$ 277

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Equity - Equity Offering (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Feb. 23, 2021
Subsidiary, Sale of Stock [Line Items]
Net proceeds from issuance of common stock	$ 3,401
ATM Agreement
Subsidiary, Sale of Stock [Line Items]
Maximum amount of shares to be issued		$ 50,000
Stock issued (in shares)	357,148
Net proceeds from issuance of common stock	$ 3,400

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Equity - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended						6 Months Ended
	Jul. 28, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Distributions
Declared Dividends per Common Share (in dollars per share)		$ 0.145	$ 0.145	$ 0.145	$ 0.145	$ 0.145	$ 0.145	$ 0.290	$ 0.290
Dividends Paid		$ 22,331	$ 22,155	$ 22,177	$ 22,308	$ 22,176	$ 22,171	$ 44,486	$ 44,347
Subsequent Event
Distributions
Declared Dividends per Common Share (in dollars per share)	$ 0.145

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Revenue from Contract with Customers - Disaggregate Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) hp	Jun. 30, 2020 USD ($) hp	Jun. 30, 2021 USD ($) hp	Jun. 30, 2020 USD ($) hp
Disaggregation of Revenue
Revenue	$ 195,615	$ 220,316	$ 391,046	$ 470,013
Contract Operations
Disaggregation of Revenue
Revenue	163,865	187,949	329,899	394,923
Contract Operations | Transferred at Point in Time
Disaggregation of Revenue
Revenue	1,400	1,500	2,400	3,100
Contract Operations | 0 - 1,000 horsepower per unit
Disaggregation of Revenue
Revenue	$ 45,918	$ 57,728	$ 92,837	$ 124,468
Contract Operations | 0 - 1,000 horsepower per unit | Minimum
Disaggregation of Revenue
Compressor units horsepower (horsepower) | hp	0	0	0	0
Contract Operations | 0 - 1,000 horsepower per unit | Maximum
Disaggregation of Revenue
Compressor units horsepower (horsepower) | hp	1,000	1,000	1,000	1,000
Contract Operations | 1,001 - 1,500 horsepower per unit
Disaggregation of Revenue
Revenue	$ 66,852	$ 78,026	$ 135,316	$ 162,878
Contract Operations | 1,001 - 1,500 horsepower per unit | Minimum
Disaggregation of Revenue
Compressor units horsepower (horsepower) | hp	1,001	1,001	1,001	1,001
Contract Operations | 1,001 - 1,500 horsepower per unit | Maximum
Disaggregation of Revenue
Compressor units horsepower (horsepower) | hp	1,500	1,500	1,500	1,500
Contract Operations | Over 1,500 horsepower per unit
Disaggregation of Revenue
Revenue	$ 50,939	$ 51,618	$ 101,342	$ 106,209
Contract Operations | Over 1,500 horsepower per unit | Minimum
Disaggregation of Revenue
Compressor units horsepower (horsepower) | hp	1,500	1,500	1,500	1,500
Contract Operations | Other, including fees
Disaggregation of Revenue
Revenue	$ 156	$ 577	$ 404	$ 1,368
Aftermarket Services
Disaggregation of Revenue
Revenue	31,750	32,367	61,147	75,090
Aftermarket Services | Services
Disaggregation of Revenue
Revenue	17,008	19,081	33,900	44,531
Aftermarket Services | OTC parts and components sales
Disaggregation of Revenue
Revenue	$ 14,742	$ 13,286	$ 27,247	$ 30,559

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Revenue from Contract with Customers - Performance Obligations (Details) $ in Thousands	Jun. 30, 2021 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 286,557
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 155,764
Performance obligations expected to be satisfied, expected timing	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 106,352
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 20,785
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 3,512
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations	$ 144
Performance obligations expected to be satisfied, expected timing	1 year

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Revenue from Contract with Customers - Contract Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Disaggregation of Revenue
Accounts receivable, trade, net of allowance	$ 106,393	$ 104,425
Contract with Customers
Disaggregation of Revenue
Accounts receivable, trade, net of allowance	$ 96,000	$ 95,600

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Revenue from Contract with Customers - Credit Losses (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Revenue from Contract with Customer [Abstract]
Contractual life of accounts receivable	30 days
Period for analyzing historical loss data to determine loss experience	2 years
Changes in the allowance for credit losses balance
Balance at beginning of period	$ 3,370
Provision for (benefit from) credit losses	(215)	$ 2,282
Write-offs charged against the allowance	(424)
Balance at end of period	$ 2,731

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Revenue from Contract with Customers - Contract Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Contract liability with customer	$ 3,600		$ 4,600
Deferred revenue recognized in earnings	5,048	$ 12,762
Deferred revenue	$ 4,068	$ 8,253

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Long-Lived Asset Impairment (Details) - Idle Compressor Units hp in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) CompressorUnit hp	Jun. 30, 2020 USD ($) CompressorUnit hp	Jun. 30, 2021 USD ($) CompressorUnit hp	Jun. 30, 2020 USD ($) CompressorUnit hp
Impaired Long-Lived Assets Held and Used
Idle compressors retired from the active fleet | CompressorUnit	45	450	115	535
Horsepower of idle compressors retired from the active fleet | hp	13	184	37	207
Impairment recorded on idle compressors retired from the active fleet | $	$ 2,832	$ 55,210	$ 9,844	$ 61,405

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Restructuring Charges - By segment (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring charges
Restructuring charges	$ 743	$ 2,408		$ 1,640	$ 4,136
Severance costs
Restructuring charges
Restructuring charges	605	2,408		1,493	4,136
Organizational Restructuring
Restructuring charges
Restructuring charges					1,728
Estimated additional charges	0			0
Organizational Restructuring | Severance costs
Restructuring charges
Restructuring charges			$ 1,700		1,728
Pandemic Restructuring
Restructuring charges
Restructuring charges	605	2,408		1,493	2,408
Pandemic Restructuring | Severance costs
Restructuring charges
Restructuring charges	605	2,408		1,493	2,408
Restructuring charges incurred to date	6,800			6,800
Property Restructuring
Restructuring charges
Restructuring charges	7			16
Restructuring charges incurred to date	1,500			1,500
Property Restructuring | Impairment
Restructuring charges
Restructuring charges				9
Other Restructuring
Restructuring charges
Restructuring charges	131			131
Corporate
Restructuring charges
Restructuring charges	285			879	1,361
Corporate | Organizational Restructuring
Restructuring charges
Restructuring charges					625
Corporate | Pandemic Restructuring
Restructuring charges
Restructuring charges	147	736		732	736
Corporate | Property Restructuring
Restructuring charges
Restructuring charges	7			16
Corporate | Other Restructuring
Restructuring charges
Restructuring charges	131			131
Contract Operations | Operating
Restructuring charges
Restructuring charges	337			616	1,864
Contract Operations | Operating | Organizational Restructuring
Restructuring charges
Restructuring charges					478
Contract Operations | Operating | Pandemic Restructuring
Restructuring charges
Restructuring charges	337	1,386		616	1,386
Aftermarket Services | Operating
Restructuring charges
Restructuring charges	121			145	911
Aftermarket Services | Operating | Organizational Restructuring
Restructuring charges
Restructuring charges					625
Aftermarket Services | Operating | Pandemic Restructuring
Restructuring charges
Restructuring charges	$ 121	$ 286		$ 145	$ 286

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Restructuring Charges - By type (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Restructuring charges
Restructuring charges	$ 743	$ 2,408		$ 1,640	$ 4,136
Organizational Restructuring
Restructuring charges
Restructuring charges					1,728
Pandemic Restructuring
Restructuring charges
Restructuring charges	605	2,408		1,493	2,408
Property Restructuring
Restructuring charges
Restructuring charges	7			16
Other Restructuring
Restructuring charges
Restructuring charges	131			131
Severance costs
Restructuring charges
Restructuring charges	605	2,408		1,493	4,136
Severance costs | Organizational Restructuring
Restructuring charges
Restructuring charges			$ 1,700		1,728
Severance costs | Pandemic Restructuring
Restructuring charges
Restructuring charges	605	$ 2,408		1,493	$ 2,408
Other restructuring costs | Property Restructuring
Restructuring charges
Restructuring charges	7			7
Other restructuring costs | Other Restructuring
Restructuring charges
Restructuring charges	$ 131			131
Impairment | Property Restructuring
Restructuring charges
Restructuring charges				$ 9

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Income Taxes (Details) $ in Millions	Jun. 30, 2021 USD ($)
Income Taxes
Potential decrease in unrecognized tax benefit	$ 2.8

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Earnings Per Share - Net Income Attributable to Common Stockholders (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Summary of net income attributable to Archrock common stockholders used in the calculation of basic and diluted income per common share
Net income (loss)	$ 8,752	$ (30,381)	$ 12,921	$ (91,568)
Less: Earnings attributable to participating securities	(285)	(321)	(454)	(643)
Net income (loss) attributable to common stockholders, basic	8,467	(30,702)	12,467	(92,211)
Net income (loss) attributable to common stockholders, diluted	$ 8,467	$ (30,702)	$ 12,467	$ (92,211)
Potential shares of common stock included in computing diluted income (loss) attributable to Archrock common stockholders
Weighted average common shares outstanding including participating securities	154,047	152,937	153,334	152,750
Less: Weighted average participating securities outstanding	(2,014)	(2,194)	(1,797)	(2,122)
Weighted average common shares outstanding used in basic net income (loss) per common share (in shares)	152,033	150,743	151,537	150,628
Weighted average common shares outstanding used in diluted net income (loss) per common share (in shares)	152,203	150,743	151,699	150,628
On exercise of options and vesting of performance-based restricted stock units
Potential shares of common stock included in computing diluted income (loss) attributable to Archrock common stockholders
Net dilutive potential common shares issuable (in shares)	169		159
On settlement of ESPP shares
Potential shares of common stock included in computing diluted income (loss) attributable to Archrock common stockholders
Net dilutive potential common shares issuable (in shares)	1		3

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Earnings Per Share - Anti-dilutive Shares (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)	22	174	33	193
On exercise of options where exercise price is greater than average market value for the period
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)	22	95	33	111
On exercise of options and vesting of performance-based restricted stock units
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)		57		57
On settlement of ESPP shares
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)		22		25

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Derivatives - Interest Rate Swaps (Details) - Derivatives Designated as Hedging Instruments $ in Millions	Jun. 30, 2021 USD ($)
Interest Rate Swaps
Notional Disclosures
Deferred pre-tax losses to be reclassified during next 12 months	$ 3.9
Weighted average effective fixed interest rate on interest rate swaps (as a percent)	1.80%
Interest rate swap, expiring March 2022
Notional Disclosures
Notional amount of interest rate swaps	$ 300.0

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Derivatives - Effect of Derivative Instruments on Balance Sheets (Details) - Derivatives Designated as Hedging Instruments - Interest Rate Swaps - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Derivatives
Derivative liability	$ 3,853	$ 6,337
Accrued liabilities
Derivatives
Derivative liability	$ 3,853	4,810
Other liabilities
Derivatives
Derivative liability		$ 1,527

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Derivatives - Effect of Derivative Instruments on Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Effect of derivative instruments on results of operations
Total amount of interest expense in which the effects of cash flow hedges are recorded	$ 25,958	$ 25,778	$ 57,203	$ 55,443
Interest Rate Swaps
Effect of derivative instruments on results of operations
Pre-tax gain (loss) recognized in other comprehensive income (loss)	(79)	(738)	(89)	(8,311)
Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	(1,302)	(1,073)	(2,573)	(1,322)
Total amount of interest expense in which the effects of cash flow hedges are recorded	$ 25,958	$ 25,778	$ 57,203	$ 55,443

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Fair Value Measurements - Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Recurring Basis | Level 2
Fair value measurement of assets and liabilities
Derivative liability	$ 3,853	$ 6,337

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Fair Value Measurements - Measured on Nonrecurring Basis (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Mar. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) $ / hp Y	Dec. 31, 2020 USD ($) $ / hp
Fair value
Goodwill impairment | $	$ 99,800	$ 99,830
Impaired Long-Lived Assets | Compressors | Measurement Input, Sale proceeds | Minimum
Fair value
Measurement input			0	0
Impaired Long-Lived Assets | Compressors | Measurement Input, Sale proceeds | Maximum
Fair value
Measurement input			621	289
Impaired Long-Lived Assets | Compressors | Measurement Input, Sale proceeds | Weighted average
Fair value
Measurement input			30	20
Level 3 | Impaired Long-Lived Assets | Compressors | Measurement Input, Weighted average disposal period
Fair value
Measurement input | Y			4
Level 3 | Impaired Long-Lived Assets | Compressors | Measurement Input, Discount for market liquidity
Fair value
Measurement input			0.70	0.81
Nonrecurring Basis | Level 3 | Impaired Long-Lived Assets | Compressors
Fair value
Impaired assets | $			$ 3,462	$ 19,046

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Fair Value Measurements - Fair Value of Debt (Details) - Fixed Rate Debt - Level 2 - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 1,366,000	$ 1,371,000
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 1,295,990	$ 1,295,867

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Stock-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Total stock-based compensation expense	$ 3,586	$ 3,614	$ 6,835	$ 6,072
Equity awards
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Total stock-based compensation expense	3,178	2,772	5,841	5,778
Liability awards
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Total stock-based compensation expense	$ 408	$ 842	$ 994	$ 294

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Stock-Based Compensation - Restricted Stock, Restricted Stock Units, and Performance Units Activity (Details) shares in Thousands	6 Months Ended
	Jun. 30, 2021 $ / shares shares
Restricted Stock, Restricted Stock Units, Performance Units, Cash Settled Restricted Stock Units and Cash Settled Performance Units
Shares
Non-vested awards at beginning of period (in shares)	2,446
Granted (in shares)	1,279
Vested (in shares)	(620)
Canceled (in shares)	(41)
Non-vested awards at end of period (in shares)	3,064
Weighted Average Grant Date Fair Value Per Share
Non-vested awards at beginning of period (in dollars per share) | $ / shares	$ 9.69
Granted (in dollars per share) | $ / shares	11.22
Vested (in dollars per share) | $ / shares	9.36
Canceled (in dollars per share) | $ / shares	9.82
Non-vested awards at end of period (in dollars per share) | $ / shares	$ 10.39
Cash-settled units
Shares
Non-vested awards at end of period (in shares)	611
Stock-settled awards and units
Shares
Non-vested awards at end of period (in shares)	2,453

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Stock-Based Compensation - Restricted Stock, Restricted Stock Units, and Performance Units Expense (Details) - Restricted Stock, Restricted Stock Units, Performance Units, Cash Settled Restricted Stock Units and Cash Settled Performance Units $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($)
Unrecognized compensation
Unrecognized compensation cost related to unvested awards (in dollars)	$ 20.0
Weighted-average period over which the expected unrecognized compensation cost related to unvested stock options will be recognized	2 years

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Commitments and Contingencies - Performance Bonds (Details) $ in Millions	Jun. 30, 2021 USD ($)
Performance Bonds
Commitments and contingencies
Maximum potential undiscounted payments	$ 2.2

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Commitments and Contingencies - Tax Matters - Loss contingencies (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Non-income based tax audits
Loss Contingencies [Line Items]
Accrued liability for the outcomes of non-income based tax audits	$ 5.4	$ 5.6
Non-income based tax audits being managed by Exterran Corporation
Loss Contingencies [Line Items]
Accrued liability for the outcomes of non-income based tax audits	$ 0.0	$ 1.6

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Related Party Transactions (Details) - Affiliated Entity shares in Millions, $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 01, 2019 director shares	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
JDH Capital | Archrock, Inc.
Related Party Transaction
Ownership interest (percent)		11.10%		11.10%
JDH Capital and affiliates of Hilcorp
Related Party Transaction
Number of directors shareholders have right to designate | director	1
JDH Capital | Elite Acquisition | Common Stock
Related Party Transaction
Minimum ownership interest of outstanding shares required to elect a board of director (percent)	7.50%
Jeffery D. Hildebrand | Director
Related Party Transaction
Compensation paid by entity to individual in role as Director						$ 0.0
Jason C. Rebrook | Director
Related Party Transaction
Compensation paid by entity to individual in role as Director						0.0
Hilcorp and affiliates
Related Party Transaction
Revenue from related party transactions		$ 9.6	$ 10.2	$ 19.1	$ 20.8
Due from related party		$ 4.4		$ 4.4		$ 3.9
Elite Acquisition | JDH Capital | Common Stock
Related Party Transaction
Shares issued as compensation for asset acquisition (shares) | shares	21.7

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Segments - Number (Details)	6 Months Ended
	Jun. 30, 2021 segment
Segment Reporting [Abstract]
Number of reportable segments	2

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Segments - Revenue and Gross Margin by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue and other financial information by reportable segment
Revenue	$ 195,615	$ 220,316	$ 391,046	$ 470,013
Gross margin	106,738	128,240	215,021	264,295
Contract Operations
Revenue and other financial information by reportable segment
Revenue	163,865	187,949	329,899	394,923
Gross margin	102,478	124,559	207,147	252,882
Aftermarket Services
Revenue and other financial information by reportable segment
Revenue	31,750	32,367	61,147	75,090
Gross margin	$ 4,260	$ 3,681	$ 7,874	$ 11,413

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Segments - Reconciliation of Net Income to Gross Margin (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Reconciliation Net Income (Loss) to Gross Margin
Total gross margin	$ 106,738	$ 128,240		$ 215,021	$ 264,295
Less:
Selling, general and administrative	26,077	28,745		51,161	59,371
Depreciation and amortization	44,193	48,849		89,905	98,671
Long-lived and other asset impairment	2,960	55,210		10,033	61,405
Goodwill impairment			$ 99,800		99,830
Restructuring charges	743	2,408		1,640	4,136
Interest expense	25,958	25,778		57,203	55,443
Debt extinguishment loss		3,971			3,971
(Gain) loss on sale of assets, net	(3,124)	2,189		(14,156)	(1,927)
Other income, net	(82)	(438)		(1,971)	(993)
Income (loss) before income taxes	$ 10,013	$ (38,472)		$ 21,206	$ (115,612)

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Subsequent Events (Details)		1 Months Ended	6 Months Ended
	Jul. 01, 2021 USD ($)	Jul. 30, 2021 USD ($) CompressorUnit	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Subsequent Events
Gain on sale			$ 5,995,000	$ 3,172,000
Subsequent Event
Subsequent Events
Notional value dedesignated	$ 125,000,000.0
Subsequent Event | Disposed of by Sale | July 2021 Disposition
Subsequent Events
Number of compressors | CompressorUnit		575
Compressor units horsepower (horsepower)		100,000
Consideration received		$ 61,000,000.0
Gain on sale		$ 13,500,000