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, 2019

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, 2019: 130,319,665 shares.

TABLE OF CONTENTS

	Page
GLOSSARY	3
FORWARD-LOOKING STATEMENTS	4
PART I. FINANCIAL INFORMATION
Item 1. Financial Statements (unaudited)	6
Condensed Consolidated Balance Sheets	6
Condensed Consolidated Statements of Operations	7
Condensed Consolidated Statements of Comprehensive Income	8
Condensed Consolidated Statements of Equity	9
Condensed Consolidated Statements of Cash Flows	10
Notes to Unaudited 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	40
Item 4. Controls and Procedures	40
PART II. OTHER INFORMATION
Item 1. Legal Proceedings	41
Item 1A. Risk Factors	41
Item 2. Unregistered Sales of Equity Securities	42
Item 3. Defaults Upon Senior Securities	42
Item 4. Mine Safety Disclosures	42
Item 5. Other Information	42
Item 6. Exhibits	43
SIGNATURES	44

2

GLOSSARY

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

2018 Form 10-K	Archrock, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2018
2021 Notes	$350.0 million of 6% senior notes due April 2021, issued in March 2013
2022 Notes	$350.0 million of 6% 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
Amendment No. 1	Amendment No. 1 to Credit Agreement, dated February 23, 2018, which amended that certain 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
Archrock Credit Facility	Archrock’s $350 million revolving credit facility terminated in April 2018 in connection with the Merger and Amendment No.1
ASC 606 Revenue	Accounting Standards Codification Topic 606 Revenue from Contracts with Customers
ASC 840 Leases	Accounting Standards Codification Topic 840 Leases
ASC 842 Leases	Accounting Standards Codification Topic 842 Leases
ASU 2016-13	Accounting Standards Update No. 2016-13 Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments
ASU 2017-12	Accounting Standards Update No. 2017-12 Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities
ASU 2018-02	Accounting Standards Update No. 2018-02 Income Statement—Reporting Comprehensive Income (Topic 220)—Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income
ASU 2018-13	Accounting Standards Update No. 2018-13 Fair Value Measurement (Topic 820)—Disclosure Framework — Changes to the Disclosure Requirements for Fair Value Measurement
Credit Facility	$1.25 billion asset-based revolving credit facility due March 2022, as amended by Amendment No. 1
EBITDA	Earnings before interest, taxes, depreciation and amortization
Elite Acquisition	Transaction expected to close in the third quarter of 2019 pursuant to the Asset Purchase Agreement entered into on June 23, 2019
Elite Compression	Elite Compression Services, LLC
Exchange Act	Securities Exchange Act of 1934, as amended
FASB	Financial Accounting Standards Board
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
Harvest	Harvest Four Corners, LLC
Harvest Sale	Transaction expected to close in the third quarter of 2019 pursuant to the Asset Purchase Agreement entered into on June 23, 2019
Hilcorp	Hilcorp Energy Company
JDH Capital	JDH Capital Holdings, L.P.
Merger	Transaction completed on April 26, 2018 in which Archrock acquired all of the Partnership’s outstanding common units not already owned by Archrock pursuant to the Agreement and Plan of Merger, dated as of January 1, 2018, among Archrock and the Partnership, which was amended by Amendment No. 1 to Agreement and Plan of Merger on January 11, 2018
OTC	Over-the-counter, as related to aftermarket services parts and components
Partnership	Archrock Partners, L.P., together with its subsidiaries
ROU	Right-of-use, as related to the new lease model under ASC 842 Leases
SEC	U.S. Securities and Exchange Commission
Securities Act	Securities Act of 1933, as amended
SG&A	Selling, general and administrative
Spin-off	Spin-off of our international contract operations, international aftermarket services and global fabrication businesses into a standalone public company operating as Exterran Corporation which was completed in November 2015
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 Merger; 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 2018 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, as well as the following risks and uncertainties:

• the risk that cost savings, tax benefits and any other synergies from the Merger may not be fully realized or may take longer to realize than expected;

• conditions in the oil and natural gas industry, including the level of production of, demand for or price of oil or natural gas;

• our reduced profit margins or the loss of market share resulting from competition or the introduction of competing technologies by other companies;

• changes in economic or political conditions, including terrorism and legislative changes;

• the inherent risks associated with our operations, such as equipment defects, impairments, malfunctions and natural disasters;

• the risk that counterparties will not perform their obligations under our financial instruments;

• the financial condition of our customers;

• our ability to timely and cost-effectively obtain components necessary to conduct our business;

• employment and workforce factors, including our ability to hire, train and retain key employees;

• our ability to implement certain business and financial objectives, such as:

– winning profitable new business;

– growing our asset base and enhancing asset utilization;

– integrating acquired businesses;

– generating sufficient cash; and

– accessing the capital markets at an acceptable cost;

• liability related to the use of our services;

• changes in governmental safety, health, environmental or other regulations, which could require us to make significant expenditures;

4

• the effectiveness of our control environment, including the identification of control deficiencies; and

• our level of indebtedness and ability to fund our business.

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.

5

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, 2019			December 31, 2018
Assets
Current assets:
Cash and cash equivalents	$	2,015		$	5,610
Accounts receivable, trade, net of allowance of $1,554 and $1,452, respectively	146,831			147,985
Inventory	74,159			76,333
Tax refund receivable	—			15,262
Other current assets	8,506			10,706
Current assets associated with discontinued operations	—			300
Total current assets	231,511			256,196
Property, plant and equipment, net	2,294,370			2,171,038
Operating lease ROU assets	18,022			—
Intangible assets, net	44,731			52,370
Contract costs, net	42,424			39,020
Other assets	21,781			26,828
Noncurrent assets associated with discontinued operations	8,467			7,063
Total assets	$	2,661,306		$	2,552,515
Liabilities and Equity
Current liabilities:
Accounts payable, trade	$	58,759		$	54,939
Accrued liabilities	82,687			78,997
Deferred revenue	10,865			16,509
Current liabilities associated with discontinued operations	269			297
Total current liabilities	152,580			150,742
Long-term debt	1,628,814			1,529,501
Operating lease liabilities	16,647			—
Deferred income taxes	4,448			2,842
Other liabilities	17,460			20,793
Noncurrent liabilities associated with discontinued operations	8,467			7,063
Total liabilities	1,828,416			1,710,941
Commitments and contingencies (Note 18)
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, 136,899,297 and 135,787,509 shares issued, respectively	1,369			1,358
Additional paid-in capital	3,182,247			3,177,982
Accumulated other comprehensive income (loss)	(2,772		)	5,773
Accumulated deficit	(2,267,235		)	(2,263,677		)
Treasury stock: 6,577,558 and 6,381,605 common shares, at cost, respectively	(80,719		)	(79,862		)
Total equity	832,890			841,574
Total liabilities and equity	$	2,661,306		$	2,552,515

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

6

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS

(in thousands, except per share amounts)

(unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Revenue:
Contract operations	$	186,258		$	165,450		$	368,765		$	326,647
Aftermarket services	52,132			61,420			105,784			112,263
Total revenue	238,390			226,870			474,549			438,910
Cost of sales (excluding depreciation and amortization):
Contract operations	70,521			67,809			145,256			132,404
Aftermarket services	42,215			50,793			86,117			93,130
Total cost of sales (excluding depreciation and amortization)	112,736			118,602			231,373			225,534
Selling, general and administrative	28,618			26,649			57,607			54,157
Depreciation and amortization	45,482			43,331			89,588			87,786
Long-lived asset impairment	8,632			6,953			11,724			11,663
Restatement and other charges	24			(1,076		)	445			(591		)
Interest expense	25,954			23,337			49,571			45,884
Debt extinguishment loss	3,653			2,450			3,653			2,450
Transaction-related costs	2,687			5,686			2,867			9,811
Other income, net	(2,010		)	(1,644		)	(2,215		)	(2,789		)
Income before income taxes	12,614			2,582			29,936			5,005
Provision for (benefit from) income taxes	1,191			(1,567		)	(1,216		)	(1,213		)
Income from continuing operations	11,423			4,149			31,152			6,218
Loss from discontinued operations, net of tax	—			—			(273		)	—
Net income	11,423			4,149			30,879			6,218
Less: Net income attributable to the noncontrolling interest	—			(2,212		)	—			(8,097		)
Net income (loss) attributable to Archrock stockholders	$	11,423		$	1,937		$	30,879		$	(1,879	)
Basic and diluted net income (loss) per common share attributable to Archrock common stockholders	$	0.09		$	0.02		$	0.24		$	(0.02	)
Weighted average common shares outstanding:
Basic	128,328			111,296			128,261			90,589
Diluted	128,354			111,402			128,297			90,589

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

7

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(in thousands)

(unaudited)

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income	$	11,423		$	4,149		$	30,879		$	6,218
Other comprehensive income (loss), net of tax:
Interest rate swap gain (loss), net of reclassifications to earnings	(5,320		)	1,720			(8,545		)	6,282
Amortization of terminated interest rate swaps	—			85			—			230
Merger-related adjustments	—			5,670			—			5,670
Total other comprehensive income (loss)	(5,320		)	7,475			(8,545		)	12,182
Comprehensive income	6,103			11,624			22,334			18,400
Less: Comprehensive income attributable to the noncontrolling interest	—			(3,506		)	—			(12,360		)
Comprehensive income attributable to Archrock stockholders	$	6,103		$	8,118		$	22,334		$	6,040

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

8

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(in thousands, except share and per share amounts)

(unaudited)

	Archrock Stockholders
	Common Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Income (Loss)			Treasury Stock					Accumulated Deficit			Noncontrolling Interest
	Amount		Shares						Amount			Shares								Total
Balance at April 1, 2018	$	778	77,779,797	$	3,094,881	$	3,194		$	(77,773	)	(6,072,751	)	$	(2,238,800	)	$	(44,407	)	$	737,873
Cash dividends ($0.120 per common share)														(15,486		)				(15,486		)
Shares issued in employee stock purchase plan	1		23,092	192																193
Stock-based compensation, net of forfeitures			11,290	1,968																1,968
Stock options exercised			29,855	262																262
Merger-related adjustments	576		57,634,005	52,815													40,901			94,292
Comprehensive income
Net income														1,937			2,212			4,149
Interest rate swap gain, net of reclassifications to earnings						426											1,294			1,720
Amortization of terminated interest rate swaps						85														85
Merger-related adjustments						5,670														5,670
Balance at June 30, 2018	$	1,355	135,478,039	$	3,150,118	$	9,374		$	(77,773	)	(6,072,751	)	$	(2,252,349	)	$	—		$	830,725
Balance at April 1, 2019	$	1,369	136,876,352	$	3,180,546	$	2,548		$	(80,719	)	(6,484,075	)	$	(2,261,452	)	$	—		$	842,292
Cash dividends ($0.132 per common share)														(17,206		)				(17,206		)
Shares issued in employee stock purchase plan			19,073	189																189
Stock-based compensation, net of forfeitures			3,872	1,512								(93,483	)							1,512
Comprehensive income
Net income														11,423						11,423
Interest rate swap loss, net of reclassifications to earnings						(5,320		)												(5,320		)
Balance at June 30, 2019	$	1,369	136,899,297	$	3,182,247	$	(2,772	)	$	(80,719	)	(6,577,558	)	$	(2,267,235	)	$	—		$	832,890

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

ARCHROCK, INC.

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY

(in thousands, except share and per share amounts)

(unaudited)

	Archrock Stockholders
	Common Stock			Additional Paid-in Capital		Accumulated Other Comprehensive Income (Loss)			Treasury Stock					Accumulated Deficit			Noncontrolling Interest
	Amount		Shares						Amount			Shares								Total
Balance at January 1, 2018	$	769	76,880,862	$	3,093,058	$	1,197		$	(76,732	)	(5,930,380	)	$	(2,241,243	)	$	(41,431	)	$	735,618
Treasury stock purchased									(1,041		)	(109,466	)							(1,041		)
Cash dividends ($0.240 per common share)														(24,018		)				(24,018		)
Shares issued in employee stock purchase plan	1		50,046	415																416
Stock-based compensation, net of forfeitures	9		883,271	3,568								(32,905	)				(64		)	3,513
Stock options exercised			29,855	262																262
Cash distribution to noncontrolling unitholders of the Partnership																	(11,766		)	(11,766		)
Impact of adoption of ASC 606 Revenue														14,666						14,666
Impact of adoption of ASU 2017-12														383						383
Impact of adoption of ASU 2018-02						258								(258		)				—
Merger-related adjustments	576		57,634,005	52,815													40,901			94,292
Comprehensive income
Net income (loss)														(1,879		)	8,097			6,218
Interest rate swap gain, net of reclassifications to earnings						2,019											4,263			6,282
Amortization of terminated interest rate swaps						230														230
Merger-related adjustments						5,670														5,670
Balance at June 30, 2018	$	1,355	135,478,039	$	3,150,118	$	9,374		$	(77,773	)	(6,072,751	)	$	(2,252,349	)	$	—		$	830,725
Balance at January 1, 2019	$	1,358	135,787,509	$	3,177,982	$	5,773		$	(79,862	)	(6,381,605	)	$	(2,263,677	)	$	—		$	841,574
Treasury stock purchased									(857		)	(87,036	)							(857		)
Cash dividends ($0.264 per common share)														(34,437		)				(34,437		)
Shares issued in employee stock purchase plan			48,801	407																407
Stock-based compensation, net of forfeitures	11		1,062,987	3,858								(108,917	)							3,869
Comprehensive income
Net income														30,879						30,879
Interest rate swap loss, net of reclassifications to earnings						(8,545		)												(8,545		)
Balance at June 30, 2019	$	1,369	136,899,297	$	3,182,247	$	(2,772	)	$	(80,719	)	(6,577,558	)	$	(2,267,235	)	$	—		$	832,890

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,
	2019			2018
Cash flows from operating activities:
Net income	$	30,879		$	6,218
Adjustments to reconcile net income to cash provided by operating activities:
Loss from discontinued operations, net of tax	273			—
Depreciation and amortization	89,588			87,786
Long-lived asset impairment	11,724			11,663
Inventory write-downs	492			1,018
Amortization of operating lease ROU assets	1,425			—
Amortization of deferred financing costs	3,041			3,094
Amortization of debt discount	545			694
Amortization of terminated interest rate swaps	—			291
Debt extinguishment loss	3,653			2,450
Interest rate swaps	(802		)	327
Stock-based compensation expense	3,869			3,763
Provision for doubtful accounts	335			908
Gain on sale of assets	(1,785		)	(2,188		)
Deferred income tax benefit	(1,819		)	(1,327		)
Amortization of contract costs	10,724			6,281
Deferred revenue recognized in earnings	(25,227		)	(11,274		)
Changes in assets and liabilities:
Accounts receivable, trade	(5,015		)	(10,458		)
Inventory	2,160			(50		)
Other assets	12,817			484
Contract costs	(14,128		)	(15,998		)
Accounts payable and other liabilities	6,102			9,858
Deferred revenue	19,747			11,781
Other	65			(106		)
Net cash provided by operating activities	148,663			105,215
Cash flows from investing activities:
Capital expenditures	(234,972		)	(132,172		)
Proceeds from sale of property, plant and equipment	21,954			19,193
Proceeds from insurance and other settlements	676			252
Net cash used in investing activities	(212,342		)	(112,727		)
Cash flows from financing activities:
Proceeds from borrowings of long-term debt	1,254,000			383,830
Repayments of long-term debt	(1,151,000		)	(343,636		)
Payments for debt issuance costs	(8,829		)	(3,332		)
Proceeds from (payments for) settlement of interest rate swaps that include financing elements	800			(207		)
Dividends paid to Archrock stockholders	(34,437		)	(24,018		)
Distributions paid to noncontrolling partners in the Partnership	—			(11,766		)
Proceeds from stock options exercised	—			262
Proceeds from stock issued under employee stock purchase plan	407			416
Purchases of treasury stock	(857		)	(1,041		)
Net cash provided by financing activities	60,084			508
Net decrease in cash and cash equivalents	(3,595		)	(7,004		)
Cash and cash equivalents, beginning of period	5,610			10,536
Cash and cash equivalents, end of period	$	2,015		$	3,532
Supplemental disclosure of non-cash transactions:
Issuance of Archrock common stock pursuant to Merger, net of tax	$	—		$	53,391

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

10

ARCHROCK, INC.

NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. Organization and Basis of Presentation

We are an energy infrastructure company with a pure-play focus on midstream natural gas compression. We believe 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 includes all adjustments, consisting only of normal recurring adjustments, which are necessary to present fairly 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 2018 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.

Recent Business Developments

Elite Acquisition

On June 23, 2019, we entered into an asset purchase agreement with Elite Compression pursuant to which we will acquire from Elite Compression substantially all of its assets, including a fleet of predominantly-large compressor units comprising approximately 430,000 horsepower, a fleet of vehicles, real personal property and parts inventory, and certain liabilities for aggregate consideration of $205.0 million cash and 21,656,683 newly-issued shares of Archrock common stock. We intend to fund the cash portion of the purchase price with borrowings on the Credit Facility. The Elite Acquisition is expected to close in the third quarter of 2019 subject to certain closing conditions and the consummation of the Harvest Sale (see below).

Harvest Sale

On June 23, 2019, we entered into an asset purchase agreement with Harvest pursuant to which Harvest will acquire from us approximately 80,000 active and idle compression horsepower, vehicles and parts inventory for consideration of $30 million to be paid in cash. The Harvest Sale is expected to close in the third quarter of 2019, subject to customary closing conditions.

During the three and six months ended June 30, 2019, we incurred transaction costs of $2.5 million related to the Elite Acquisition and Harvest Sale, which is reflected in transaction-related costs in our condensed consolidated statements of operations.

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2. Recent Accounting Developments

Accounting Standards Updates Implemented

Leases

ASC 842 Leases establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. Under the new guidance, lessor accounting is largely unchanged. We adopted ASC 842 Leases on January 1, 2019 using the modified retrospective transition method and elected the practical expedient package to not reassess (i) whether any expired or existing contracts are or contain leases, (ii) lease classification of any expired or existing leases and (iii) initial direct costs for any existing leases. We did not elect the practical expedient to use hindsight in determining the lease term. Adoption of ASC 842 Leases resulted in recognition of an operating lease ROU asset of $18.6 million and an operating lease liability of $20.0 million in our condensed consolidated balance sheet at January 1, 2019. The difference of $1.4 million related to accrued rent and prepaid lease payments recorded to our consolidated balance sheet as of December 31, 2018. We did not recognize any finance lease ROU assets or liabilities upon adoption of ASC 842 Leases. There was no impact to our condensed consolidated statements of operations, equity or cash flows upon adoption. Comparative information has not been recast and continues to be reported under the accounting standards in effect for those periods.

ASC 842 Leases also provides a practical expedient, elected by class of underlying asset, to not separate lease and nonlease components and instead account for those components as a single component if certain conditions are met. ASC 842 Leases also provides clarification for lessors on whether ASC 842 Leases or ASC 606 Revenue is applicable to the combined component based on determination of the predominant component. We have concluded that for our contract operations services agreements, in which we are a lessor, the services nonlease component is predominant over the compression unit lease component and therefore ongoing recognition of these agreements will continue to follow the ASC 606 Revenue guidance. We have also elected, as a lessee, to not separate lease and nonlease components as it relates to our facility leases.

In addition, we have made an accounting policy election, as permitted by ASC 842 Leases, to not apply the recognition requirements of ASC 842 Leases to leases with an initial term of 12 months or less.

Accounting Standards Updates Not Yet Implemented

In August 2018, the FASB issued ASU 2018-13 which amends the required fair value measurements disclosures related to valuation techniques and inputs used, uncertainty in measurement and changes in measurements applied. These amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. We are currently evaluating the impact of ASU 2018-13 on our consolidated financial statements and footnote disclosures.

In June 2016, the FASB issued ASU 2016-13 which changes the impairment model for most financial assets and certain other instruments, including trade and other receivables, held-to-maturity debt securities and loans, and requires entities to use a new forward-looking expected loss model that will result in earlier recognition of allowance for losses. For public entities that meet the definition of an SEC filer, ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and early adoption is permitted. Entities will apply ASU 2016-13 provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. We are currently evaluating the impact of ASU 2016-13 on our consolidated financial statements and footnote disclosures.

3. 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 which include, but are not limited to, the tax matters agreement. The tax matters agreement governs the respective rights, responsibilities and obligations of Exterran Corporation and us with respect to tax liabilities and benefits, tax attributes, the preparation and filing of tax returns, the control of audits and other tax proceedings and certain other matters regarding taxes. Subject to the provisions of this agreement, we and Exterran Corporation 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.

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As of June 30, 2019 and December 31, 2018, we had $8.5 million and $7.1 million, respectively, 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 $8.5 million and $7.1 million related to these unrecognized tax benefits recorded to noncurrent assets associated with discontinued operations as of June 30, 2019 and December 31, 2018, respectively.

The following table summarizes the statements of operations data for discontinued operations (in thousands):

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Other income, net	$	—	$	(1,432	)
Provision for income taxes	—		1,705
Loss from discontinued operations, net of tax	$	—	$	(273	)

The following table summarizes the balance sheet data for discontinued operations (in thousands):

	June 30, 2019		December 31, 2018
Other current assets	$	—	$	300
Other assets	8,467		7,063
Total assets associated with discontinued operations	$	8,467	$	7,363
Accrued liabilities	$	269	$	297
Deferred income taxes	8,467		7,063
Total liabilities associated with discontinued operations	$	8,736	$	7,360

4. Inventory

Inventory consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Parts and supplies	$	64,403	$	65,645
Work in progress	9,756		10,688
Inventory	$	74,159	$	76,333

5. Property, Plant and Equipment, Net

Property, plant and equipment, net, consisted of the following (in thousands):

	June 30, 2019			December 31, 2018
Compression equipment, facilities and other fleet assets	$	3,472,300		$	3,323,465
Land and buildings	46,517			47,067
Transportation and shop equipment	105,941			103,766
Computer hardware and software	93,434			92,174
Other	13,111			11,880
Property, plant and equipment	3,731,303			3,578,352
Accumulated depreciation	(1,436,933		)	(1,407,314		)
Property, plant and equipment, net	$	2,294,370		$	2,171,038

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6. Long-Term Debt

Long-term debt consisted of the following (in thousands):

	June 30, 2019			December 31, 2018
Credit Facility	$	792,500		$	839,500
2027 Notes	500,000			—
Less: Deferred financing costs, net of amortization	(8,550		)	—
	491,450			—
2022 Notes	350,000			350,000
Less: Debt discount, net of amortization	(2,411		)	(2,766		)
Less: Deferred financing costs, net of amortization	(2,725		)	(3,133		)
	344,864			344,101
2021 Notes	—			350,000
Less: Debt discount, net of amortization	—			(1,789		)
Less: Deferred financing costs, net of amortization	—			(2,311		)
	—			345,900
Long-term debt	$	1,628,814		$	1,529,501

Archrock Credit Facility

In April 2018, in connection with the Merger and Amendment No. 1, the Archrock Credit Facility was terminated. As a result of the termination, we recorded a debt extinguishment loss of $2.5 million during the three and six months ended June 30, 2018. We incurred $0.2 million in commitment fees in 2018 prior to the facility’s termination and were in compliance with all covenants through its closing.

Credit Facility

As of June 30, 2019, there were $15.2 million letters of credit outstanding under the Credit Facility and the applicable margin on borrowings outstanding was 2.7%. The weighted average annual interest rate on the outstanding balance under the Credit Facility, excluding the effect of interest rate swaps, was 5.3% and 5.4% at June 30, 2019 and December 31, 2018, respectively. We incurred $0.6 million in commitment fees on the daily unused amount of the Credit Facility during each of the three months ended June 30, 2019 and 2018 and $1.1 million during each of the six months ended June 30, 2019 and 2018.

We must maintain the following consolidated financial ratios, as defined in the Credit Facility agreement:

EBITDA to Interest Expense	2.5 to 1.0
Senior Secured Debt to EBITDA	3.5 to 1.0
Total Debt to EBITDA
Through fiscal year 2019	5.75 to 1.0
Through second quarter of 2020	5.50 to 1.0
Thereafter (1)	5.25 to 1.0

——————

⁽¹⁾  Subject to a temporary increase to 5.5 to 1.0 for any quarter during which an acquisition satisfying certain thresholds is completed and for the two quarters immediately following such quarter.

As of June 30, 2019, the ratio requirements above did not constrain our undrawn capacity and as such, all of the $442.3 million of undrawn capacity was available for additional borrowings. As of June 30, 2019, we were in compliance with all covenants under the Credit Facility agreement.

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2027 Notes

On March 21, 2019, we completed a private offering of $500.0 million aggregate principal amount of 6.875% senior notes due April 2027 and received net proceeds of $491.2 million after deducting issuance costs. The $8.8 million of issuance costs were recorded as deferred financing costs within long-term debt in our condensed consolidated balance sheets and are being amortized to interest expense in our condensed consolidated statement of operations over the term of the notes. The net proceeds were used to repay borrowings outstanding under the Credit Facility as of March 31, 2019.

The 2027 Notes have not been and will not be registered under the Securities Act or the securities laws of any other jurisdiction and may not be offered or sold in the U.S. except pursuant to a registration exemption under the Securities Act and applicable state securities laws. We offered and issued the 2027 Notes only to qualified institutional buyers in accordance with Rule 144A under the Securities Act and to certain non-U.S. persons outside the U.S. in accordance with Regulation S under the Securities Act.

The 2027 Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by us and all of our existing subsidiaries, other than Archrock Partners, L.P. and APLP Finance Corp., which are co-issuers of the 2027 Notes, and certain of our future subsidiaries. The 2027 Notes and the guarantees rank equally in right of payment with all of our and the guarantors’ existing and future senior indebtedness.

The 2027 Notes may be redeemed at any time, in whole or in part, at specified redemption prices and make-whole premiums, plus any accrued and unpaid interest.

Redemption of 2021 Notes

On April 5, 2019, the 2021 Notes were redeemed at 100% of their $350.0 million aggregate principal amount plus accrued and unpaid interest of $0.2 million with borrowings from the Credit Facility. We recorded a debt extinguishment loss of $3.7 million related to the redemption during the three and six months ended June 30, 2019.

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7. Revenue from Contracts with Customers

Disaggregation of Revenue

The following table presents our revenue from contracts with customers disaggregated by revenue source (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contract operations (1):
0 - 1,000 horsepower per unit	$	63,683	$	59,600	$	127,422	$	119,192
1,001 - 1,500 horsepower per unit	75,598		68,948		149,938		135,178
Over 1,500 horsepower per unit	45,969		35,904		89,394		70,314
Other (2)	1,008		998		2,011		1,963
Total contract operations (3)	186,258		165,450		368,765		326,647
Aftermarket services (1):
Services	33,281		36,706		66,802		68,913
OTC parts and components sales	18,851		24,714		38,982		43,350
Total aftermarket services (4)	52,132		61,420		105,784		112,263
Total revenue	$	238,390	$	226,870	$	474,549	$	438,910

——————

⁽¹⁾  We operate in two segments: contract operations and aftermarket services. See Note 19 (“Segments”) for further details regarding our segments.

⁽²⁾  Primarily related to fees associated with Archrock-owned non-compressor equipment.

⁽³⁾  Included $2.2 million and $1.4 million for the three months ended June 30, 2019 and 2018, respectively, and $4.4 million and $2.7 million for the six months ended June 30, 2019 and 2018, respectively, related to billable maintenance on Archrock-owned units that was recognized at a point in time. All other contract operations revenue is recognized over time.

⁽⁴⁾  All service 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, 2019, we had $312.9 million of remaining performance obligations related to our contract operations segment. We have elected to apply the practical expedient to not consider the effects of the time value of money, as the expected time between the transfer of services and payment for such services is less than one year. The remaining performance obligations will be recognized through 2024 as follows (in thousands):

	2019		2020		2021		2022		2023		2024		Total
Remaining performance obligations	$	148,323	$	117,192	$	37,632	$	8,295	$	1,122	$	293	$	312,857

As of June 30, 2019 we have elected to apply the practical expedient to 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 Balances

As of June 30, 2019 and December 31, 2018, our receivables from contracts with customers, net of allowance for doubtful accounts, were $139.3 million and $142.1 million, respectively. As of June 30, 2019 and December 31, 2018, our contract liabilities were $11.6 million and $17.1 million, respectively, which are included in deferred revenue and other liabilities in our condensed consolidated balance sheets. Freight billings to customers for the transport of compressor assets and milestone billings on aftermarket services often result in a contract liability. We recognized $25.2 million of our December 31, 2018 contract liability balance as revenue during the six months ended June 30, 2019, primarily related to freight billings and aftermarket services.

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8. Leases

We determine if an arrangement is a lease at inception. We determine lease classification and recognize ROU assets and liabilities on the lease commencement date based on the present value of lease payments over the lease term. As the discount rate implicit in the lease is rarely readily determinable, we estimate our incremental borrowing rate using information available at commencement date in determining the present value of the lease payments. The lease term includes options to extend when we are reasonably certain to exercise the option. Short-term leases, those with an initial term of 12 months or less, are not recorded on the balance sheet. Variable costs such as our proportionate share of actual costs for utilities, common area maintenance, property taxes and insurance are not included in the lease liability and are recognized in the period in which they are incurred. Operating lease expense for lease payments is recognized on a straight-line basis over the term of the lease. As of June 30, 2019, all of our leases were operating.

The facility leases discussed below, of which we are the lessee, contain lease and nonlease components for which we have elected the practical expedient to account for as a single lease component, as the nonlease components are not significant to the total consideration in the contract and separating the nonlease component would have no effect on lease classification. As it relates to our contract operations services agreements in which we are the lessor, the services nonlease component is predominant over the compression unit lease component and therefore ongoing recognition of these agreements will continue to follow the ASC 606 Revenue guidance.

We have operating leases and subleases for office space, temporary housing, storage and shops. Our leases have remaining lease terms of one to 11 years and most include options to extend the lease term, at our discretion, for an additional three to five years. We are not, however, reasonably certain that we will exercise any of the options to extend and as such, they have not been included in the remaining lease terms.

Balance sheet information related to our operating leases was as follows (in thousands):

	Classification	June 30, 2019
ROU assets	Operating lease ROU assets	$	18,022
Lease liabilities
Current	Accrued liabilities	$	2,827
Noncurrent	Operating lease liabilities	16,647
Total lease liabilities		$	19,474

The components of lease cost were as follows (in thousands):

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Operating lease cost	$	970	$	1,944
Short-term lease cost	65		238
Variable lease cost	560		942
Total lease cost	$	1,595	$	3,124

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Cash flow and noncash information related to our operating leases were as follows (in thousands):

	Six Months Ended June 30, 2019
Operating cash flows - cash paid for amounts included in the measurement of operating lease liabilities	$	2,802
Operating lease ROU assets obtained in exchange for new lease liabilities	862

Other supplemental information related to our operating leases was as follows:

	June 30, 2019
Weighted average remaining lease term (in years)	8.5
Weighted average discount rate	5.3	%

Remaining maturities of lease liabilities governed under ASC 842 Leases as of June 30, 2019 were as follows (in thousands):

2019	$	1,569
2020	3,763
2021	3,538
2022	2,439
2023	2,131
2024	1,740
Thereafter	9,310
Total lease payments	24,490
Less: Interest	(5,016		)
Total lease liabilities under ASC 842 Leases	$	19,474

Maturities of lease liabilities governed under ASC 840 Leases as of December 31, 2018 were as follows (in thousands):

2019	$	4,317
2020	3,980
2021	3,562
2022	2,433
2023	2,170
Thereafter	11,935
Total lease liabilities under ASC 840 Leases	$	28,397

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9. Derivatives

We are exposed to market risks associated with changes in the variable interest rate of the 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.

At June 30, 2019, the following interest rate swaps, entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates, were outstanding (in millions):

Expiration Date	Notional Value
May 2020	$	100
March 2022	300
	$	400

The counterparties to the derivative agreements are major financial institutions. We monitor the credit quality of these financial institutions and do not expect non-performance by any counterparty, although such non-performance could have a material adverse effect on us. We have no collateral posted for the derivative instruments.

We have designated these interest rate swaps as cash flow hedging instruments. Changes in the fair value of the interest rate swaps 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 this 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 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 perform quarterly qualitative prospective and retrospective hedge effectiveness assessments unless facts and circumstances related to the hedging relationships change such that we can no longer assert qualitatively that the cash flow hedge relationships were and continue to be highly effective. We estimate that $0.3 million of the deferred pre-tax gain attributable to interest rate swaps included in accumulated other comprehensive income at June 30, 2019 will be reclassified into earnings as interest income at then-current values during the next 12 months as the underlying hedged transactions occur.

As of June 30, 2019, the weighted average effective fixed interest rate on the interest rate swaps was 1.8%.

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

	June 30, 2019			December 31, 2018
Other current assets	$	336		$	3,185
Other assets	—			4,122
Total derivative assets	$	336		$	7,307
Other liabilities	$	(1,574	)	$	—

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The following tables present the effect of the derivative instruments designated as cash flow hedging instruments on our condensed consolidated statements of operations (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Pre-tax gain (loss) recognized in other comprehensive income (loss)	$	(4,529	)	$	2,245		$	(6,828	)	$	6,941
Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	791			(39		)	1,717			(513		)

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Total amount of interest expense in which the effects of cash flow hedges are recorded	$	25,954	$	23,337	$	49,571	$	45,884
Amount of gain reclassified from accumulated other comprehensive income (loss) into interest expense	791		207		1,717		153

See Note 10 (“Fair Value Measurements”) and Note 17 (“Accumulated Other Comprehensive Income (Loss)”) for further details on our derivative instruments.

10. Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

On a quarterly basis, our interest rate swaps are valued based on the income approach (discounted cash flow) using market observable inputs, including London Interbank Offered Rate forward curves. These fair value measurements are classified as Level 2. The following table presents our interest rate swaps asset and liability measured at fair value on a recurring basis, with pricing levels as of the date of valuation (in thousands):

	June 30, 2019			December 31, 2018
Interest rate swaps asset	$	336		$	7,307
Interest rate swaps liability	(1,574		)	—

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

During the six months ended June 30, 2019, we recorded non-recurring fair value measurements related to our idle and previously-culled compressor units. Our estimate of the compressor units’ 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 fair value of our impaired compressor units was $1.6 million and $2.3 million at June 30, 2019 and December 31, 2018, respectively. See Note 11 (“Long-Lived 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 the Credit Facility approximates fair value due to its variable interest rate. The fair value of these outstanding borrowings was estimated using a discounted cash flow analysis based on interest rates offered on loans with similar terms to borrowers of similar credit quality, which are Level 3 inputs.

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The fair value of our fixed rate debt was estimated based on quoted prices in inactive markets and is considered a Level 2 measurement. The following table summarizes the carrying amount and fair value of our fixed rate debt (in thousands):

	June 30, 2019		December 31, 2018
Carrying amount of fixed rate debt (1)	$	836,314	$	690,001
Fair value of fixed rate debt	881,000		674,000

——————

⁽¹⁾  Carrying amounts are shown net of unamortized debt discounts and unamortized deferred financing costs. See Note 6 (“Long-Term Debt”).

11. Long-Lived 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 compressor units from our active fleet, indicate that the carrying amount of an asset may not be recoverable.

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 compressor units 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 impairment review as recorded in our contract operations segment (dollars in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Idle compressor units retired from the active fleet	160		120		180		165
Horsepower of idle compressor units retired from the active fleet	41,000		27,000		56,000		50,000
Impairment recorded on idle compressor units retired from the active fleet	$	8,632	$	6,953	$	11,724	$	11,663

12. Hosting Arrangements

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

Certain costs incurred for the implementation of our hosting arrangements that are service contracts are being capitalized and will be amortized on a straight-line basis over the term of the respective contract. As of June 30, 2019 and December 31, 2018, we had $2.0 million and $0.4 million, respectively, of implementation costs related to our hosting arrangements that are service contracts capitalized to other assets in our condensed consolidated balance sheets. Amortization of the capitalized implementation costs will be recorded to SG&A in our consolidated statements of income and is expected to begin in future periods as the individual contract components become ready for their intended use.

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13. Income Taxes

The year-to-date effective tax rate for the six months ended June 30, 2019 differed significantly from our statutory rate primarily due to the reduction of a valuation allowance, which was recorded to offset the tax effect of the increase in book income in the six months ended June 30, 2019, as well as the release of an unrecognized tax benefit due to the settlement of a tax audit.

Unrecognized Tax Benefits

As of June 30, 2019, we believe it is reasonably possible that $1.9 million of our unrecognized tax benefits, including penalties, interest and discontinued operations, will be reduced prior to June 30, 2020 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 which could materially differ from this estimate.

14. Earnings per Share

Net Income (Loss) Attributable to Archrock Common Stockholders per Common Share

Basic net income (loss) attributable to Archrock common stockholders 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) attributable to Archrock common stockholders per common share is determined by dividing net income (loss) attributable to Archrock common stockholders 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, no effect is given to participating securities because they do not have a contractual obligation to participate in our losses.

Diluted net income (loss) attributable to Archrock common stockholders 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 employee stock purchase plan unless their effect would be anti-dilutive.

The following table summarizes net income (loss) attributable to Archrock common stockholders used in the calculation of basic and diluted net income (loss) per common share (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income (loss) from continuing operations attributable to Archrock stockholders	$	11,423		$	1,937		$	31,152		$	(1,879	)
Loss from discontinued operations, net of tax	—			—			(273		)	—
Net income (loss) attributable to Archrock stockholders	11,423			1,937			30,879			(1,879		)
Less: Net income attributable to participating securities	(261		)	(157		)	(574		)	(313		)
Net income (loss) attributable to Archrock common stockholders	$	11,162		$	1,780		$	30,305		$	(2,192	)

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Weighted average common shares outstanding including participating securities	130,330		112,995		130,276		92,130
Less: Weighted average participating securities outstanding	(2,002	)	(1,699	)	(2,015	)	(1,541	)
Weighted average common shares outstanding used in basic net income (loss) per common share	128,328		111,296		128,261		90,589
Net dilutive potential common shares issuable:
On exercise of options and vesting of performance-based restricted stock units	25		99		33		*
On settlement of employee stock purchase plan shares	1		7		3		*
Weighted average common shares outstanding used in diluted net income (loss) per common share	128,354		111,402		128,297		90,589

——————

* Excluded from diluted net income (loss) per common share as their inclusion would have been anti-dilutive.

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

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Net dilutive potential common shares issuable:
On exercise of options where exercise price is greater than average market value for the period	154	187	154	205
On exercise of options and vesting of performance-based restricted stock units	—	—	—	89
On settlement of employee stock purchase plan shares	—	—	—	5
Net dilutive potential common shares issuable	154	187	154	299

15. Equity

Merger Transaction

In April 2018, we completed the Merger and acquired all of the common units of the Partnership not owned by us prior to the Merger. As a result of the Merger, the Partnership’s common units are no longer publicly traded. The 2021 Notes and 2022 Notes were not impacted by the Merger.

As we controlled the Partnership prior to the Merger and continue to control the Partnership after the Merger, we accounted for the change in our ownership interest in the Partnership as an equity transaction in the second quarter of 2018 and no gain or loss was recognized in our condensed consolidated statements of operations as a result of the Merger. The tax effects of the Merger were reported as adjustments to other assets, noncurrent assets associated with discontinued operations, deferred income taxes, additional paid-in capital and other comprehensive income.

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The following table presents the effects of changes in our ownership interest in the Partnership on the equity attributable to Archrock stockholders:

	Six Months Ended June 30, 2018
Net loss attributable to Archrock stockholders	$	(1,879	)
Decrease in Archrock stockholders’ additional paid-in capital for purchase of Partnership common units	52,815
Change from net loss attributable to Archrock stockholders and transfers from noncontrolling interest	$	50,936

Prior to the Merger, public unitholders held a 57% ownership interest in the Partnership and we owned the remaining 43% equity interest. The earnings of the Partnership that were attributed to its common units held by the public prior to the Merger are reflected in net income attributable to the noncontrolling interest in our condensed consolidated statements of operations.

Cash Dividends

The following table summarizes our dividends declared and paid in each of the quarterly periods of 2019 and 2018:

	Dividends per Common Share		Total Dividends (in thousands)
2018
Q1	$	0.120	$	8,532
Q2	0.120		15,486
Q3	0.132		17,114
Q4	0.132		17,156
2019
Q1	$	0.132	$	17,231
Q2	0.132		17,206

On July 24, 2019, our board of directors declared a quarterly dividend of $0.145 per share of common stock to be paid on August 14, 2019 to stockholders of record at the close of business on August 7, 2019.

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16. Stock-Based Compensation

We have granted restricted stock, restricted stock units and performance-based restricted stock units to employees and non-employee directors under the Archrock, Inc. 2013 Stock Incentive Plan.

The following table presents restricted stock, restricted stock unit, performance-based restricted stock unit and cash-settled performance unit activity during the six months ended June 30, 2019:

	Shares (in thousands)		Weighted Average Grant Date Fair Value Per Share
Non-vested awards, January 1, 2019	1,728		$	9.68
Granted	1,383		10.01
Vested	(402	)	6.33
Canceled	(153	)	10.33
Non-vested awards, June 30, 2019 (1)(2)	2,556		10.35

——————

⁽¹⁾  Non-vested awards as of June 30, 2019 are comprised of 451,000 cash-settled restricted stock units and cash-settled performance units and 2,105,000 restricted shares and stock-settled performance units.

⁽²⁾  During the three months ended June 30, 2019, the settlement terms of 99,631 performance units, with grant dates in 2018 and 2019, were modified from settlement in stock to cash. The change in award settlement from stock to cash was the only modification to these awards; the vesting, forfeiture and all other terms and conditions were unchanged. The modification resulted in a $0.2 million reclassification from additional paid-in capital to other current liabilities in our condensed consolidated balance sheets and had an immaterial impact on our condensed consolidated statements of operations.

As of June 30, 2019, we expect $18.5 million of unrecognized compensation cost related to unvested restricted stock, stock-settled restricted stock units, performance units, cash-settled restricted stock units and cash-settled performance units to be recognized over the weighted-average period of 2.2 years.

Total stock-based compensation expense consisted of the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Equity awards	$	1,512	$	1,969	$	3,869	$	3,763
Liability awards	640		666		1,606		967
Total stock-based compensation	$	2,152	$	2,635	$	5,475	$	4,730

17. Accumulated Other Comprehensive Income (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 consists of changes in the fair value of our interest rate swap derivative instruments, net of tax, which are designated as cash flow hedges, amortization of terminated interest rate swaps and adjustments related to changes in our ownership of the Partnership.

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The following table presents the changes in accumulated other comprehensive income (loss) of our derivative cash flow hedges, net of tax and excluding noncontrolling interest, during the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2019			2018		2019			2018
Beginning accumulated other comprehensive income	$	2,548		$	3,194	$	5,773		$	1,197
Gain (loss) recognized in other comprehensive income (loss), net of tax provision of $0, $472, $0 and $888, respectively (1)	(4,529		)	479		(6,828		)	2,051
(Gain) loss reclassified from accumulated other comprehensive income (loss) to interest expense, net of tax benefit of $0, $(8), $0 and $(53), respectively (1)(2)	(791		)	31		(1,717		)	456
Merger-related adjustments (3)	—			5,670		—			5,670
Other comprehensive income (loss) attributable to Archrock stockholders	(5,320		)	6,180		(8,545		)	8,177
Ending accumulated other comprehensive income (loss)	$	(2,772	)	$	9,374	$	(2,772	)	$	9,374

——————

⁽¹⁾  Included adjustments of $1.1 million and $1.8 million related to an increase in the valuation allowance recorded to offset the tax effect of other comprehensive loss recorded during the three and six months ended June 30, 2019, respectively.

⁽²⁾  Included stranded tax effects resulting from the Tax Cuts and Jobs Act, which was implemented in December 2017, of $0.3 million reclassified to accumulated deficit during the six months ended June 30, 2018.

⁽³⁾  Pursuant to the Merger, we reclassified a gain of $5.7 million from noncontrolling interest to accumulated other comprehensive income (loss) related to the fair value of our derivative instruments that was previously attributed to public ownership of the Partnership.

See Note 9 (“Derivatives”) for further details on our interest rate swap derivative instruments.

18. 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 2019 through the third quarter of 2020 and maximum potential future payments of $2.3 million. As of June 30, 2019, 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 each of June 30, 2019 and December 31, 2018, we accrued $4.5 million 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 June 30, 2019 and December 31, 2018, we recorded an indemnification liability (including penalties and interest), in addition to the tax contingency above, of $2.7 million and $2.6 million, respectively, for our share of non-income-based tax contingencies related to audits being managed by Exterran Corporation.

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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.

Litigation and Claims

In the ordinary course of business, we are involved in various pending or threatened legal actions. While management is unable to predict the ultimate outcome of these actions, it believes 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.

19. 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 part 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.

The following table presents revenue and gross margin by segment during the three and six months ended June 30, 2019 and 2018 (in thousands): 

	Contract Operations		Aftermarket Services		Total
Three months ended June 30, 2019
Revenue	$	186,258	$	52,132	$	238,390
Gross margin	115,737		9,917		125,654
Three months ended June 30, 2018
Revenue	$	165,450	$	61,420	$	226,870
Gross margin	97,641		10,627		108,268
Six months ended June 30, 2019
Revenue	$	368,765	$	105,784	$	474,549
Gross margin	223,509		19,667		243,176
Six months ended June 30, 2018
Revenue	$	326,647	$	112,263	$	438,910
Gross margin	194,243		19,133		213,376

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Total gross margin	$	125,654		$	108,268		$	243,176		$	213,376
Less:
Selling, general and administrative	28,618			26,649			57,607			54,157
Depreciation and amortization	45,482			43,331			89,588			87,786
Long-lived asset impairment	8,632			6,953			11,724			11,663
Restatement and other charges	24			(1,076		)	445			(591		)
Interest expense	25,954			23,337			49,571			45,884
Debt extinguishment loss	3,653			2,450			3,653			2,450
Transaction-related costs	2,687			5,686			2,867			9,811
Other income, net	(2,010		)	(1,644		)	(2,215		)	(2,789		)
Income before income taxes	$	12,614		$	2,582		$	29,936		$	5,005

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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 the Financial Statements of this Quarterly Report on Form 10-Q and in conjunction with our 2018 Form 10-K.

Overview

We are an energy infrastructure company with a pure-play focus on midstream natural gas compression. We believe 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

Elite Acquisition and Harvest Sale

On June 23, 2019, we entered into an asset purchase agreement with Elite Compression pursuant to which we will acquire from Elite Compression substantially all of its assets, including a fleet of predominantly-large compressor units comprising approximately 430,000 horsepower, a fleet of vehicles, real personal property and parts inventory, and certain liabilities for aggregate consideration of $205.0 million cash and 21,656,683 newly-issued shares of Archrock common stock. The Elite Acquisition is expected to close in the third quarter of 2019 subject to certain closing conditions and the consummation of the Harvest Sale.

Additionally, on June 23, 2019, we entered into an asset purchase agreement with Harvest pursuant to which Harvest will acquire from us approximately 80,000 active and idle compression horsepower, vehicles and parts inventory for cash consideration of $30 million.

See Note 1 (“Organization and Basis of Presentation”) to our Financial Statements for further details of these transactions.

Senior Notes Offering and Redemption

On March 21, 2019, we completed a private offering of $500.0 million aggregate principal amount of the 2027 Notes. We received net proceeds of $491.2 million after issuance costs which were used to repay borrowings outstanding under the Credit Facility as of March 31, 2019. On April 5, 2019, we borrowed on the Credit Facility to repay the 2021 Notes. See Note 6 (“Long-Term Debt”) to our Financial Statements for further details of these transactions.

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Operating Highlights

The following table summarizes our available and operating horsepower and horsepower utilization (in thousands, except percentages):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Total available horsepower (at period end)(1)	4,096		3,881		4,096		3,881
Total operating horsepower (at period end)(2)	3,611		3,354		3,611		3,354
Average operating horsepower	3,587		3,342		3,567		3,316
Horsepower utilization:
Spot (at period end)	88	%	86	%	88	%	86	%
Average	88	%	86	%	88	%	86	%

——————

⁽¹⁾  Defined as idle and operating horsepower. New compressor units completed by a third party manufacturer 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, the impact of 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 companies 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, restatement and other charges, interest expense, debt extinguishment loss, transaction-related costs, other (income) loss, net, provision for (benefit from) income taxes and loss from discontinued operations, net of tax. 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 to gross margin (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income	$	11,423		$	4,149		$	30,879		$	6,218
Selling, general and administrative	28,618			26,649			57,607			54,157
Depreciation and amortization	45,482			43,331			89,588			87,786
Long-lived asset impairment	8,632			6,953			11,724			11,663
Restatement and other charges	24			(1,076		)	445			(591		)
Interest expense	25,954			23,337			49,571			45,884
Debt extinguishment loss	3,653			2,450			3,653			2,450
Transaction-related costs	2,687			5,686			2,867			9,811
Other income, net	(2,010		)	(1,644		)	(2,215		)	(2,789		)
Provision for (benefit from) income taxes	1,191			(1,567		)	(1,216		)	(1,213		)
Loss from discontinued operations, net of tax	—			—			273			—
Gross margin	$	125,654		$	108,268		$	243,176		$	213,376

Financial Results of Operations

Summary of Results

Revenue. Revenue was $238.4 million and $226.9 million during the three months ended June 30, 2019 and 2018, respectively, and $474.5 million and $438.9 million during the six months ended June 30, 2019 and 2018, respectively. The increases in revenue during the three and six months ended June 30, 2019 compared to the three and six months ended June 30, 2018 were due to increases in revenue from our contract operations business.

Net income (loss) attributable to Archrock stockholders. Net income attributable to Archrock stockholders was $11.4 million and $1.9 million during the three months ended June 30, 2019 and 2018, respectively. Net income attributable to Archrock stockholders was $30.9 million and net loss attributable to Archrock stockholders was $1.9 million during the six months ended June 30, 2019 and 2018, respectively.

The increase in net income attributable to Archrock stockholders during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was primarily driven by the increase in gross margin from our contract operations business and decreases in transaction-related costs and net income attributable to the noncontrolling interest, partially offset by the change from benefit from income taxes to provision for income taxes and increases in interest expense, depreciation and amortization and SG&A.

The change from net loss to net income attributable to Archrock stockholders during the six ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily driven by the increase in gross margin from our contract operations business and decreases in net income attributable to the noncontrolling interest and transaction-related costs, partially offset by increases in interest expense and SG&A.

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Three Months Ended June 30, 2019 Compared to Three Months Ended June 30, 2018

Contract Operations

(dollars in thousands)

	Three Months Ended June 30,						Increase
	2019			2018			(Decrease)
Revenue	$	186,258		$	165,450		13	%
Cost of sales (excluding depreciation and amortization expense)	70,521			67,809			4	%
Gross margin	$	115,737		$	97,641		19	%
Gross margin percentage (1)	62		%	59		%	3	%

——————

⁽¹⁾    Defined as gross margin divided by revenue.

The increase in revenue during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was primarily due to an increase in contract operations rates driven by an increase in customer demand as well as the increase in average operating horsepower.

Gross margin increased during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 primarily due to the increase in revenue mentioned above partially offset by the increase in cost of sales. The increase in cost of sales was primarily driven by an increase in maintenance and freight expense associated with the increase in average operating horsepower. These increases in cost of sales were partially offset by a decrease in cost associated with the start-up of compressor units, as the increase in average operating horsepower was mostly comprised of newly-built compressor units.

Gross margin percentage increased during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 primarily due to the increase in contract operations rates mentioned above.

Aftermarket Services

(dollars in thousands)

	Three Months Ended June 30,						Increase
	2019			2018			(Decrease)
Revenue	$	52,132		$	61,420		(15)	%
Cost of sales (excluding depreciation and amortization expense)	42,215			50,793			(17)	%
Gross margin	$	9,917		$	10,627		(7)	%
Gross margin percentage	19		%	17		%	2	%

The decrease in revenue during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was primarily due to a reduction in parts sales and service activities as customers delayed maintenance activities and we increased our focus on higher margin business and rates.

Gross margin decreased during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 due to the decrease in revenue mentioned above partially offset by a smaller decrease in cost of sales. The decrease in cost of sales was primarily driven by the decrease in part sales and service activities.

Gross margin percentage increased during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 primarily due to our increased focus on higher margin business and the increase in rates mentioned above.

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Costs and Expenses

(dollars in thousands)

	Three Months Ended June 30,						Increase
	2019			2018			(Decrease)
Selling, general and administrative	$	28,618		$	26,649		7	%
Depreciation and amortization	45,482			43,331			5	%
Long-lived asset impairment	8,632			6,953			24	%
Restatement and other charges	24			(1,076		)	(102	)%
Interest expense	25,954			23,337			11	%
Debt extinguishment loss	3,653			2,450			49	%
Transaction-related costs	2,687			5,686			(53	)%
Other income, net	(2,010		)	(1,644		)	22	%

Selling, general and administrative. The increase in SG&A during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was primarily due to a $1.5 million increase in professional expenses, a $1.4 million increase in compensation and benefits and a $0.3 million increase in office rent expense. These increases were partially offset by a $0.6 million decrease in miscellaneous tax expense and a $0.4 million decrease in bad debt expense.

Depreciation and amortization. The increase in depreciation and amortization expense during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was primarily due to an increase in depreciation expense associated with fixed asset additions, partially offset by a decrease in depreciation expense resulting from certain assets reaching the end of their depreciable lives as well as the impact of asset impairments during 2018 and early 2019.

Long-lived asset impairment. During the three months ended June 30, 2019 and 2018, we reviewed the future deployment of our idle compression assets for units that were not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. In addition, we evaluated for impairment idle units that had been culled from our fleet in prior years and were available for sale. See Note 11 (“Long-Lived Asset Impairment”) to our Financial Statements for further details.

The following table presents the results of our impairment review as recorded in our contract operations segment (dollars in thousands):

	Three Months Ended June 30,
	2019		2018
Idle compressor units retired from the active fleet	160		120
Horsepower of idle compressor units retired from the active fleet	41,000		27,000
Impairment recorded on idle compressor units retired from the active fleet	$	8,632	$	6,953

Restatement and other charges. During the three months ended June 30, 2018, we recorded $1.6 million for the expected recovery of shared professional and legal fees incurred related to the restatement of prior period financial statements and disclosures and related matters. We were billed $0.5 million for our share of these fees during the three months ended June 30, 2018.

Interest expense. The increase in interest expense during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was due to an increase in the average outstanding balance of long-term debt.

Debt extinguishment loss. We recorded a debt extinguishment loss of $3.7 million during the three months ended June 30, 2019 as a result of the redemption of the 2021 Notes. We recorded a debt extinguishment loss of $2.5 million during the three months ended June 30, 2018 as a result of the termination of the Archrock Credit Facility. See Note 6 (“Long-Term Debt”) to our Financial Statements for further details.

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Transaction-related costs. We incurred $2.7 million and $5.7 million of financial advisory, legal and other professional fees during the three months ended June 30, 2019 and 2018, respectively. Of the $2.7 million of fees incurred during the three months ended June 30, 2019, $2.5 million related to the Elite Acquisition and Harvest Sale. The $5.7 million of fees incurred during the three months ended June 30, 2018 related to the Merger. See Note 1 (“Organization and Basis of Presentation”) and Note 15 (“Equity”) to our Financial Statements for further details.

Other income, net. The increase in other income, net during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was primarily due to a $0.8 million increase in the gain on sale of property, plant and equipment and income of $0.3 million during the three months ended June 30, 2019 related to equipment damaged at a customer site, partially offset by $0.5 million of indemnification income received pursuant to our tax matters agreement with Exterran Corporation during the three months ended June 30, 2018.

Provision for (Benefit from) Income Taxes

(dollars in thousands)

	Three Months Ended June 30,						Increase
	2019			2018			(Decrease)
Provision for (benefit from) income taxes	$	1,191		$	(1,567	)	(176	)%
Effective tax rate	9		%	(61		)%	70	%

The change in provision for (benefit from) income taxes was primarily due to the reduction of a valuation allowance in the three months ended June 30, 2019, which was recorded to offset the tax effect of the increase in book income in the three months ended June 30, 2019 compared to the three months ended June 30, 2018, as well as the release of an unrecognized tax benefit due to the settlement of a tax audit during the three months ended June 30, 2018.

Net Income Attributable to the Noncontrolling Interest

(dollars in thousands)

	Three Months Ended June 30,					Increase
	2019		2018			(Decrease)
Net income attributable to the noncontrolling interest	$	—	$	(2,212	)	(100	)%

The noncontrolling interest comprises the portion of the Partnership’s earnings that were applicable to the Partnership’s publicly-held common unitholder interest through the completion of the Merger. See Note 15 (“Equity”) to our Financial Statements for further details on the Merger. Immediately prior to the Merger, public unitholders held a 57% ownership in the Partnership. The decrease in net income attributable to the noncontrolling interest during the three months ended June 30, 2019 compared to the three months ended June 30, 2018 was due to Archrock’s acquisition of all of the outstanding common units of the Partnership in conjunction with the Merger.

Six Months Ended June 30, 2019 Compared to Six Months Ended June 30, 2018

Contract Operations

(dollars in thousands)

	Six Months Ended June 30,						Increase
	2019			2018			(Decrease)
Revenue	$	368,765		$	326,647		13	%
Cost of sales (excluding depreciation and amortization)	145,256			132,404			10	%
Gross margin	$	223,509		$	194,243		15	%
Gross margin percentage	61		%	59		%	2	%

The increase in revenue during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to an increase in contract operations rates driven by an increase in customer demand as well as the increase in average operating horsepower.

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Gross margin increased during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 due to the increase in revenue mentioned above partially offset by the increase in cost of sales. The increase in cost of sales was primarily driven by increases in maintenance, freight and lube oil expense associated with the increase in average operating horsepower. These increases in cost of sales were partially offset by a decrease in cost associated with the start-up of compressor units, as the increase in average operating horsepower was mostly comprised of newly-built compressor units.

Gross margin percentage increased during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 primarily due to the increase in contract operations rates mentioned above.

Aftermarket Services

(dollars in thousands)

	Six Months Ended June 30,						Increase
	2019			2018			(Decrease)
Revenue	$	105,784		$	112,263		(6	)%
Cost of sales (excluding depreciation and amortization)	86,117			93,130			(8	)%
Gross margin	$	19,667		$	19,133		3	%
Gross margin percentage	19		%	17		%	2	%

The decrease in revenue during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to a reduction in parts sales and service activities as customers delayed maintenance activities and we increased our focus on higher margin business and rates.

Gross margin increased during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 due to a decrease in cost of sales partially offset by the smaller decrease in revenue mentioned above. The decrease in cost of sales was primarily driven by the decrease in part sales and service activities.

Gross margin percentage increased during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 primarily due to our increased focus on higher margin business and the increase in rates mentioned above.

Costs and Expenses

(dollars in thousands)

	Six Months Ended June 30,						Increase
	2019			2018			(Decrease)
Selling, general and administrative	$	57,607		$	54,157		6	%
Depreciation and amortization	89,588			87,786			2	%
Long-lived asset impairment	11,724			11,663			1	%
Restatement and other charges	445			(591		)	(175	)%
Interest expense	49,571			45,884			8	%
Debt extinguishment loss	3,653			2,450			49	%
Transaction-related costs	2,867			9,811			(71	)%
Other income, net	(2,215		)	(2,789		)	(21	)%

Selling, general and administrative. The increase in SG&A during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to a $3.0 million increase in compensation and benefits, a $1.8 million increase in professional expenses and a $0.6 million increase in office rent expense. These increases were partially offset by a $0.6 million decrease in bad debt expense.

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Depreciation and amortization. The increase in depreciation and amortization expense during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to an increase in depreciation expense associated with fixed asset additions, partially offset by a decrease in depreciation expense resulting from certain assets reaching the end of their depreciable lives as well as the impact of asset impairments during 2018 and early 2019.

Long-lived asset impairment. During the six months ended June 30, 2019 and 2018, we reviewed the future deployment of our idle compression assets for units that were not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. In addition, we evaluated for impairment idle units that had been culled from our fleet in prior years and were available for sale. See Note 11 (“Long-Lived Asset Impairment”) to our Financial Statements for further details.

The following table presents the results of our impairment review as recorded in our contract operations segment (dollars in thousands):

	Six Months Ended June 30,
	2019		2018
Idle compressor units retired from the active fleet	180		165
Horsepower of idle compressor units retired from the active fleet	56,000		50,000
Impairment recorded on idle compressor units retired from the active fleet	$	11,724	$	11,663

Restatement and other charges. During the six months ended June 30, 2019 and 2018, we recorded 0.4 million and $1.0 million, respectively, of restatement and other charges for our share of professional and legal fees related to the restatement of prior period financial statements and disclosures and related matters. We recorded $1.6 million for the expected recovery of shared fees incurred during the six months ended June 30, 2018.

Interest expense. The increase in interest expense during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to an increase in the average outstanding balance of long-term debt partially offset by a decrease in the weighted average effective interest rate.

Debt extinguishment loss. We recorded a debt extinguishment loss of $3.7 million during the six months ended June 30, 2019 as a result of the redemption of the 2021 Notes. We recorded a debt extinguishment loss of $2.5 million during the six months ended June 30, 2018 as a result of the termination of the Archrock Credit Facility. See Note 6 (“Long-Term Debt”) to our Financial Statements for further details.

Transaction-related costs. We incurred $2.9 million and $9.8 million of financial advisory, legal and other professional fees during the six months ended June 30, 2019 and 2018, respectively. Of the $2.9 million of fees incurred during the six months ended June 30, 2019, $2.5 million related to the Elite Acquisition and Harvest Sale. The $9.8 million of fees incurred during the six months ended June 30, 2018 related to the Merger. See Note 1 (“Organization and Basis of Presentation”) and Note 15 (“Equity”) to our Financial Statements for further detail.

Other income, net. The decrease in other income, net during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to $0.5 million of indemnification income received pursuant to our tax matters agreement with Exterran Corporation during the six months ended June 30, 2018 and a $0.4 million decrease in the gain on sale of property, plant and equipment, partially offset by income of $0.3 million during the six months ended June 30, 2019 related to equipment damaged at a customer site.

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Benefit from Income Taxes

(dollars in thousands)

	Six Months Ended June 30,						Increase
	2019			2018			(Decrease)
Benefit from income taxes	$	(1,216	)	$	(1,213	)	—	%
Effective tax rate	(4		)%	(24		)%	20	%

The increase in benefit from income taxes was primarily due to the reduction of a valuation allowance in the six months ended June 30, 2019, which was recorded to offset the tax effect of the increase in book income in the six months ended June 30, 2019 compared to the six months ended June 30, 2018, as well as a higher release of an unrecognized tax benefit due to the settlement of a tax audit in the six months ended June 30, 2019 compared to the six months ended June 30, 2018.

Net Income Attributable to the Noncontrolling Interest

(dollars in thousands)

	Six Months Ended June 30,					Increase
	2019		2018			(Decrease)
Net income attributable to the noncontrolling interest	$	—	$	(8,097	)	(100	)%

The noncontrolling interest comprises the portion of the Partnership’s earnings that were applicable to the Partnership’s publicly-held common unitholder interest through the completion of the Merger. See Note 15 (“Equity”) to our Financial Statements for further details on the Merger. Immediately prior to the Merger, public unitholders held a 57% ownership in the Partnership. The decrease in net income attributable to the noncontrolling interest during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was due to Archrock’s acquisition of all of the outstanding common units of the Partnership in conjunction with the Merger.

Liquidity and Capital 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 the Credit Facility. Our cash flow is affected by numerous factors including prices and demand for our services, volatility in commodity prices and their effect on oil and natural gas exploration and production spending, conditions in the financial markets and other factors. We believe that our operating cash flows and borrowings under the Credit Facility will be sufficient to meet our liquidity needs through at least June 30, 2020.

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.

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 consisted primarily 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, whether through construction, acquisition or modification; 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.

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The majority of our growth capital expenditures are related to the acquisition cost of new compressor units that we add to our fleet. In addition to the cost of newly acquired compressor units, growth capital expenditures can also include the upgrading of major components on an existing compressor unit where the current configuration of the compressor unit is no longer in demand and the compressor is not likely to return to an operating status without the capital expenditures. These latter expenditures substantially modify the operating parameters of the compressor unit such that it can be used in applications for which it previously was not suited. Maintenance capital expenditures are related to major overhauls of significant components of a compressor unit, such as the engine, compressor and cooler, which return the components to a like-new condition but do not modify the applications for which the compressor unit was designed.

We generally invest funds necessary to purchase fleet additions when our idle equipment cannot be reconfigured to economically fulfill a project’s requirements and the new equipment expenditure is expected to generate economic returns over its expected useful life that exceed our targeted return on capital. We currently plan to spend approximately $375 million to $400 million in capital expenditures during 2019, primarily consisting of approximately $285 million to $300 million for growth capital expenditures and approximately $60 million to $65 million for maintenance capital expenditures.

Financial Resources

Revolving Credit Facilities

Archrock Credit Facility. In April 2018, in connection with the Merger and Amendment No. 1, we terminated the Archrock Credit Facility and borrowed on the Credit Facility to repay $63.2 million in borrowings and accrued and unpaid interest and fees outstanding. All commitments under the Archrock Credit Facility were terminated and the $15.4 million of letters of credit outstanding under the Archrock Credit Facility were converted to letters of credit under the Credit Facility. Prior to its termination, the Archrock Credit Facility required us to maintain various financial ratios and other covenants, all of which we were in compliance with through its closing. The average daily debt balance under the Archrock Credit Facility in 2018, through its closing in April 2018, was $51.7 million.

Credit Facility. During the six months ended June 30, 2019 and 2018, the Credit Facility had an average daily debt balance of $784.0 million and $717.1 million, respectively. The weighted average annual interest rate on the outstanding balance under the Credit Facility, excluding the effect of interest rate swaps, was 5.3% and 5.4% at June 30, 2019 and December 31, 2018, respectively. As of June 30, 2019, there were $15.2 million letters of credit outstanding under the Credit Facility.

We must maintain the following consolidated financial ratios, as defined in the Credit Facility agreement:

EBITDA to Interest Expense	2.5 to 1.0
Senior Secured Debt to EBITDA	3.5 to 1.0
Total Debt to EBITDA
Through fiscal year 2019	5.75 to 1.0
Through second quarter of 2020	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.

As of June 30, 2019, the ratio requirements above did not constrain our undrawn capacity and as such, all of the $442.3 million of undrawn capacity was available for additional borrowings.

The Credit Facility agreement contains various additional covenants including, but not limited to, mandatory prepayments from the net cash proceeds of certain asset transfers, restrictions on the use of proceeds from borrowings and limitations on our ability to incur additional indebtedness, engage in transactions with affiliates, merge or consolidate, sell assets, make certain investments and acquisitions, make loans, grant liens, repurchase equity and pay distributions. In addition, if as of any date we have cash and cash equivalents (other than proceeds from a debt or equity issuance received in the 30 days prior to such date reasonably expected to be used to fund an acquisition permitted under the Credit Facility agreement) in excess of $50.0 million, then such excess amount will be used to pay down outstanding borrowings of a corresponding amount under the Credit Facility. As of June 30, 2019, we were in compliance with all covenants under the Credit Facility.

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2027 Notes Offering and Redemption of 2021 Notes

On March 21, 2019, we completed a private offering of $500.0 million aggregate principal amount of 6.875% senior notes due April 2027 and received net proceeds of $491.2 million after deducting issuance costs of $8.8 million related to the offering. The net proceeds were used to repay borrowings outstanding under the Credit Facility as of March 31, 2019. On April 5, 2019, we borrowed on the Credit Facility to repay the $350.0 million of 2021 Notes. See Note 6 (“Long-Term Debt”) for further details of these transactions.

Cash Flows

Our cash flows from operating, investing and financing activities, as reflected in the condensed consolidated statements of cash flows, are summarized in the table below (in thousands): 

	Six Months Ended June 30,
	2019			2018
Net cash provided by (used in):
Operating activities	$	148,663		$	105,215
Investing activities	(212,342		)	(112,727		)
Financing activities	60,084			508
Net decrease in cash and cash equivalents	$	(3,595	)	$	(7,004	)

Operating Activities

The increase in net cash provided by operating activities from continuing operations during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to increases in revenue and deferred revenue in our contract operations business primarily driven by increased customer demand, receipt of cash proceeds pursuant to a settlement of certain sales and use tax audits and a decrease in accounts receivable. These increases in cash inflows were partially offset by an increase in interest paid as the result of an increase in the average outstanding balance of our long-term debt during the six months ended June 30, 2019 compared to the six months ended June 30, 2018.

Investing Activities

The increase in net cash used in investing activities from continuing operations during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to a $102.8 million increase in capital expenditures, partially offset by a $2.8 million increase in proceeds from sale of property, plant and equipment.

Financing Activities

The increase in net cash provided by financing activities during the six months ended June 30, 2019 compared to the six months ended June 30, 2018 was primarily due to a $62.8 million net increase in borrowings of long-term debt and an $11.8 million decrease in distributions paid to noncontrolling partners in the Partnership. These changes were partially offset by a $10.4 million increase in dividends paid to Archrock stockholders and a $5.5 million increase in payments for debt issuance costs.

Dividends

On July 24, 2019, our board of directors declared a quarterly dividend of $0.145 per share of common stock to be paid on August 14, 2019 to stockholders of record at the close of business on August 7, 2019. 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 6 (“Long-Term Debt”) and Note 18 (“Commitments and Contingencies”), respectively, to our Financial Statements.

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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 2018 Form 10-K. Our exposure has not changed materially since December 31, 2018.

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, 2019 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.

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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 management is unable to predict the ultimate outcome of these actions, it believes 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

The following risk factors became significant to us in the second quarter of 2019 and should be read in conjunction with the risk factors previously disclosed in our 2018 Form 10-K.

The proposed Elite Acquisition may require significant time and attention of our management, and we may not achieve the intended benefits of the transaction as and when expected, or at all. Difficulties with the integration of the Elite Compression business and workforce could have an adverse effect on our business.

On June 23, 2019, we entered into an asset purchase agreement with Elite Compression pursuant to which we will acquire from Elite Compression substantially all of its assets, liabilities and workforce for aggregate consideration of $205.0 million cash and 21,656,683 newly-issued shares of Archrock common stock. The Elite Acquisition is expected to close in the third quarter of 2019, subject to certain customary closing conditions and the consummation of the Harvest Sale. See Note 1 (“Organization and Basis of Presentation”) to our Financial Statements for further details of these transactions.

The integration of Elite Compression will continue to require significant expense, time and the attention of our management, which may divert resources away from the operation of our business and the execution of our other strategic initiatives. In addition, we will operate a larger combined organization and the difficulties associated with integrating the acquired assets, infrastructure and personnel into our existing operations may require additional time or expense. Our and Elite Compression’s employees may also be uncertain about their future roles within Archrock pending the completion of the Elite Acquisition, which could lead to departures and increased expenses related to hiring and training new employees. Further, if the Elite Acquisition is completed, we may not realize the benefits we expect to realize. Any such difficulties could have an adverse effect on our business, results of operations and financial condition.

Further, we may not be successful in integrating the proposed Elite Acquisition into our existing operations within our anticipated timeframe, which may result in unforeseen operational difficulties and expenses, diminish our financial performance or require a disproportionate amount of our management’s attention to address. In addition, the acquired business or assets may perform at levels below the levels we anticipated at the time of acquiring such business or assets due to factors beyond our control. As a result, there can be no assurance that the proposed Elite Acquisition will deliver the benefits anticipated by us, and any failure to create such benefits may result in a negative impact to, or material adverse effect on, our business, results of operations, financial condition and cash flows.

The proposed Elite Acquisition will result in our dependence on Hilcorp for a significant portion of our revenue. The loss of business with Hilcorp or the inability or failure of Hilcorp to meet its payment obligations may adversely affect our financial results.

In connection with the proposed Elite Acquisition, Elite Compression’s contract operations services agreements will transfer to us and we expect that Hilcorp, the primary customer of Elite Compression, will account for a significant portion of our future revenue.

During the year ended December 31, 2018, Hilcorp accounted for approximately 1% of our revenue. If the Elite Acquisition is completed, we estimate that Hilcorp will become one of our most significant customers. Any loss of business from Hilcorp, unless offset by additional contract compression services revenue from other customers, or the inability or failure of Hilcorp to meet its payment obligations could have a material adverse effect on our business, results of operations and financial condition.

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Following the closing of the proposed Elite Acquisition, an affiliate of Hilcorp will hold a significant portion of our common stock, and Hilcorp’s interest as an equity holder may conflict with the interests of our other shareholders or our noteholders.

In connection with the closing of the proposed Elite Acquisition, JDH Capital, an affiliate of Hilcorp, will receive 21,656,683 newly-issued shares of Archrock common stock, representing 16.6% of outstanding Archrock common stock as of June 30, 2019. As long as JDH Capital, together with affiliates of Hilcorp, continues to own at least 7.5% of the outstanding Archrock common stock, it will have the right to nominate one director to our board of directors. Given its ownership level and board representation, JDH Capital may have some influence over our operations and strategic direction and may have interests that conflict with the interests of other equity and debt holders.

Item 2. Unregistered Sales of Equity Securities

None.

Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

None.

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Item 6. Exhibits

Exhibit No.	Description
2.1	Agreement and Plan of Merger, dated as of January 1, 2018, by and among Archrock, Inc., Archrock GP LLC, Archrock General Partner, L.P. and Archrock Partners, L.P., incorporated by reference to Exhibit 2.1 of the Registrant’s Current Report on Form 8-K filed on January 2, 2018
2.2	Amendment No. 1 to Agreement and Plan of Merger, dated as of January 11, 2018, by and among Archrock, Inc., Archrock GP LLC, Archrock General Partner, L.P., Archrock Partners, L.P. and Amethyst Merger Sub LLC, incorporated by reference to Exhibit 2.2 of the Registrant’s Current Report on Form 8-K filed on January 16, 2018
2.3	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
2.4	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	Restated Certificate of Incorporation 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 August 20, 2007
3.2	Certificate of Amendment of Certificate of Incorporation of Exterran Holdings, Inc. (now Archrock, Inc.), incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K filed on November 5, 2015
3.3	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
3.4	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
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 to the Registrant’s Current Report on Form 8-K filed on March 21, 2019
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

* Filed herewith.

** Furnished, not filed.

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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, 2019

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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, 2019

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, 2019

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, 2019 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, 2019

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, 2019 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, 2019

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, 2019	Jul. 23, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
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		130,319,665
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001389050
Amendment Flag	false
Current Fiscal Year End Date	--12-31

XML

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 2,015	$ 5,610
Accounts receivable, trade, net of allowance of $1,554 and $1,452, respectively	146,831	147,985
Inventory	74,159	76,333
Tax refund receivable	0	15,262
Other current assets	8,506	10,706
Current assets associated with discontinued operations	0	300
Total current assets	231,511	256,196
Property, plant and equipment, net	2,294,370	2,171,038
Operating lease ROU assets	18,022
Intangible assets, net	44,731	52,370
Contract costs, net	42,424	39,020
Other assets	21,781	26,828
Noncurrent assets associated with discontinued operations	8,467	7,063
Total assets	2,661,306	2,552,515
Current liabilities:
Accounts payable, trade	58,759	54,939
Accrued liabilities	82,687	78,997
Deferred revenue	10,865	16,509
Current liabilities associated with discontinued operations	269	297
Total current liabilities	152,580	150,742
Long-term debt	1,628,814	1,529,501
Operating lease liabilities	16,647
Deferred income taxes	4,448	2,842
Other liabilities	17,460	20,793
Noncurrent liabilities associated with discontinued operations	8,467	7,063
Total liabilities	1,828,416	1,710,941
Commitments and contingencies (Note 18)
Equity:
Preferred stock: $0.01 par value per share, 50,000,000 shares authorized, zero issued	0	0
Common stock: $0.01 par value per share, 250,000,000 shares authorized, 136,899,297 and 135,787,509 shares issued, respectively	1,369	1,358
Additional paid-in capital	3,182,247	3,177,982
Accumulated other comprehensive income (loss)	(2,772)	5,773
Accumulated deficit	(2,267,235)	(2,263,677)
Treasury stock: 6,577,558 and 6,381,605 common shares, at cost, respectively	(80,719)	(79,862)
Total equity	832,890	841,574
Total liabilities and equity	$ 2,661,306	$ 2,552,515

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,554	$ 1,452
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)	136,899,297	135,787,509
Treasury stock, common shares (in shares)	6,577,558	6,381,605

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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Revenues	$ 238,390	$ 226,870	$ 474,549	$ 438,910
Total cost of sales (excluding depreciation and amortization)	112,736	118,602	231,373	225,534
Selling, general and administrative	28,618	26,649	57,607	54,157
Depreciation and amortization	45,482	43,331	89,588	87,786
Long-lived asset impairment	8,632	6,953	11,724	11,663
Restatement and other charges	24	(1,076)	445	(591)
Interest expense	25,954	23,337	49,571	45,884
Debt extinguishment loss	3,653	2,450	3,653	2,450
Transaction-related costs	2,687	5,686	2,867	9,811
Other income, net	(2,010)	(1,644)	(2,215)	(2,789)
Income before income taxes	12,614	2,582	29,936	5,005
Provision for (benefit from) income taxes	1,191	(1,567)	(1,216)	(1,213)
Income from continuing operations	11,423	4,149	31,152	6,218
Loss from discontinued operations, net of tax	0	0	(273)	0
Net income	11,423	4,149	30,879	6,218
Less: Net income attributable to the noncontrolling interest	0	(2,212)	0	(8,097)
Net income (loss) attributable to Archrock stockholders	$ 11,423	$ 1,937	$ 30,879	$ (1,879)
Basic and diluted net income (loss) per common share attributable to Archrock common stockholders (in dollars per share)	$ 0.09	$ 0.02	$ 0.24	$ (0.02)
Weighted average common shares outstanding:
Basic (in shares)	128,328	111,296	128,261	90,589
Diluted (in shares)	128,354	111,402	128,297	90,589
Contract Operations | Contract operations
Revenue:
Revenues	$ 186,258	$ 165,450	$ 368,765	$ 326,647
Total cost of sales (excluding depreciation and amortization)	70,521	67,809	145,256	132,404
Aftermarket Services | Aftermarket services
Revenue:
Revenues	52,132	61,420	105,784	112,263
Total cost of sales (excluding depreciation and amortization)	$ 42,215	$ 50,793	$ 86,117	$ 93,130

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 11,423	$ 4,149	$ 30,879	$ 6,218
Other comprehensive income (loss), net of tax:
Interest rate swap gain (loss), net of reclassifications to earnings	(5,320)	1,720	(8,545)	6,282
Amortization of terminated interest rate swaps	0	85	0	230
Merger-related adjustments	0	5,670	0	5,670
Total other comprehensive income (loss)	(5,320)	7,475	(8,545)	12,182
Comprehensive income	6,103	11,624	22,334	18,400
Less: Comprehensive income attributable to the noncontrolling interest	0	(3,506)	0	(12,360)
Comprehensive income attributable to Archrock stockholders	$ 6,103	$ 8,118	$ 22,334	$ 6,040

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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Accumulated Deficit	Noncontrolling Interest
Beginning balance at Dec. 31, 2017	$ 735,618	$ 769	$ 3,093,058	$ 1,197	$ (76,732)	$ (2,241,243)	$ (41,431)
Beginning, shares at Dec. 31, 2017		76,880,862			(5,930,380)
Increase (Decrease) in Stockholders' Equity
Cash dividends	(24,018)					(24,018)
Shares issued in employee stock purchase plan	416	$ 1	415
Shares issued in employee stock purchase plan, shares		50,046
Stock-based compensation, net of forfeitures	3,513	$ 9	3,568				(64)
Stock-based compensation, net of forfeitures, shares		883,271			(32,905)
Stock options exercised	262		262
Stock options exercised, shares		29,855
Merger-related adjustments	94,292	$ 576	52,815				40,901
Merger-related adjustments, shares		57,634,005
Treasury stock purchased	(1,041)				$ (1,041)
Treasury stock purchased, shares					(109,466)
Cash distribution to noncontrolling unitholders of the Partnership	(11,766)						(11,766)
Comprehensive income
Net income (loss)	6,218					(1,879)	8,097
Interest rate swap gain (loss), net of reclassifications to earnings	6,282			2,019			4,263
Amortization of terminated interest rate swaps	230			230
Merger-related adjustments	5,670			5,670
Impact of adoption of ASU 2018-02				258		(258)
Ending balance at Jun. 30, 2018	830,725	$ 1,355	3,150,118	9,374	$ (77,773)	(2,252,349)	0
Ending, shares at Jun. 30, 2018		135,478,039			(6,072,751)
Beginning balance at Mar. 31, 2018	737,873	$ 778	3,094,881	3,194	$ (77,773)	(2,238,800)	(44,407)
Beginning, shares at Mar. 31, 2018		77,779,797			(6,072,751)
Increase (Decrease) in Stockholders' Equity
Cash dividends	(15,486)					(15,486)
Shares issued in employee stock purchase plan	193	$ 1	192
Shares issued in employee stock purchase plan, shares		23,092
Stock-based compensation, net of forfeitures	1,968		1,968
Stock-based compensation, net of forfeitures, shares		11,290
Stock options exercised	262		262
Stock options exercised, shares		29,855
Merger-related adjustments	94,292	$ 576	52,815				40,901
Merger-related adjustments, shares		57,634,005
Comprehensive income
Net income (loss)	4,149					1,937	2,212
Interest rate swap gain (loss), net of reclassifications to earnings	1,720			426			1,294
Amortization of terminated interest rate swaps	85			85
Merger-related adjustments	5,670			5,670
Ending balance at Jun. 30, 2018	830,725	$ 1,355	3,150,118	9,374	$ (77,773)	(2,252,349)	0
Ending, shares at Jun. 30, 2018		135,478,039			(6,072,751)
Beginning balance at Dec. 31, 2018	841,574	$ 1,358	3,177,982	5,773	$ (79,862)	(2,263,677)	0
Beginning, shares at Dec. 31, 2018		135,787,509			(6,381,605)
Increase (Decrease) in Stockholders' Equity
Cash dividends	(34,437)					(34,437)
Shares issued in employee stock purchase plan	407		407
Shares issued in employee stock purchase plan, shares		48,801
Stock-based compensation, net of forfeitures	3,869	$ 11	3,858
Stock-based compensation, net of forfeitures, shares		1,062,987			(108,917)
Treasury stock purchased	(857)				$ (857)
Treasury stock purchased, shares					(87,036)
Comprehensive income
Net income (loss)	30,879					30,879
Interest rate swap gain (loss), net of reclassifications to earnings	(8,545)			(8,545)
Amortization of terminated interest rate swaps	0
Merger-related adjustments				0
Ending balance at Jun. 30, 2019	832,890	$ 1,369	3,182,247	(2,772)	$ (80,719)	(2,267,235)	0
Ending, shares at Jun. 30, 2019		136,899,297			(6,577,558)
Beginning balance at Mar. 31, 2019	842,292	$ 1,369	3,180,546	2,548	$ (80,719)	(2,261,452)	0
Beginning, shares at Mar. 31, 2019		136,876,352			(6,484,075)
Increase (Decrease) in Stockholders' Equity
Cash dividends	(17,206)					(17,206)
Shares issued in employee stock purchase plan	189		189
Shares issued in employee stock purchase plan, shares		19,073
Stock-based compensation, net of forfeitures	1,512		1,512
Stock-based compensation, net of forfeitures, shares		3,872			(93,483)
Comprehensive income
Net income (loss)	11,423					11,423
Interest rate swap gain (loss), net of reclassifications to earnings	(5,320)			(5,320)
Amortization of terminated interest rate swaps	0
Merger-related adjustments				0
Ending balance at Jun. 30, 2019	$ 832,890	$ 1,369	$ 3,182,247	$ (2,772)	$ (80,719)	$ (2,267,235)	$ 0
Ending, shares at Jun. 30, 2019		136,899,297			(6,577,558)

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CONDENSED CONSOLIDATED STATEMENTS OF EQUITY (Parentheticals) - $ / shares	3 Months Ended						6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared and paid per common share (in dollars per share)	$ 0.132	$ 0.132	$ 0.132	$ 0.132	$ 0.120	$ 0.120	$ 0.264	$ 0.240

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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 30,879	$ 6,218
Adjustments to reconcile net income to cash provided by operating activities:
Loss from discontinued operations, net of tax	273	0
Depreciation and amortization	89,588	87,786
Long-lived asset impairment	11,724	11,663
Inventory write-downs	492	1,018
Amortization of operating lease ROU assets	1,425	0
Amortization of deferred financing costs	3,041	3,094
Amortization of debt discount	545	694
Amortization of terminated interest rate swaps	0	291
Debt extinguishment loss	3,653	2,450
Interest rate swaps	(802)	327
Stock-based compensation expense	3,869	3,763
Provision for doubtful accounts	335	908
Gain on sale of assets	(1,785)	(2,188)
Deferred income tax benefit	(1,819)	(1,327)
Amortization of contract costs	10,724	6,281
Deferred revenue recognized in earnings	(25,227)	(11,274)
Changes in assets and liabilities:
Accounts receivable, trade	(5,015)	(10,458)
Inventory	2,160	(50)
Other assets	12,817	484
Contract costs	(14,128)	(15,998)
Accounts payable and other liabilities	6,102	9,858
Deferred revenue	19,747	11,781
Other	65	(106)
Net cash provided by operating activities	148,663	105,215
Cash flows from investing activities:
Capital expenditures	(234,972)	(132,172)
Proceeds from sale of property, plant and equipment	21,954	19,193
Proceeds from insurance and other settlements	676	252
Net cash used in investing activities	(212,342)	(112,727)
Cash flows from financing activities:
Proceeds from borrowings of long-term debt	1,254,000	383,830
Repayments of long-term debt	(1,151,000)	(343,636)
Payments for debt issuance costs	(8,829)	(3,332)
Proceeds from (payments for) settlement of interest rate swaps that include financing elements	800
Proceeds from (payments for) settlement of interest rate swaps that include financing elements		(207)
Dividends paid to Archrock stockholders	(34,437)	(24,018)
Distributions paid to noncontrolling partners in the Partnership	0	(11,766)
Proceeds from stock options exercised	0	262
Proceeds from stock issued under employee stock purchase plan	407	416
Purchases of treasury stock	(857)	(1,041)
Net cash provided by financing activities	60,084	508
Net decrease in cash and cash equivalents	(3,595)	(7,004)
Cash and cash equivalents, beginning of period	5,610	10,536
Cash and cash equivalents, end of period	2,015	3,532
Supplemental disclosure of non-cash transactions:
Issuance of Archrock common stock pursuant to Merger, net of tax	$ 0	$ 53,391

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Organization and Basis of Presentation

6 Months Ended

Jun. 30, 2019

Accounting Policies [Abstract]

Organization and Basis of Presentation

1. Organization and Basis of Presentation

We are an energy infrastructure company with a pure-play focus on midstream natural gas compression. We believe 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 includes all adjustments, consisting only of normal recurring adjustments, which are necessary to present fairly 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 2018 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.

Recent Business Developments

Elite Acquisition

On June 23, 2019, we entered into an asset purchase agreement with Elite Compression pursuant to which we will acquire from Elite Compression substantially all of its assets, including a fleet of predominantly-large compressor units comprising approximately 430,000 horsepower, a fleet of vehicles, real personal property and parts inventory, and certain liabilities for aggregate consideration of $205.0 million cash and 21,656,683 newly-issued shares of Archrock common stock. We intend to fund the cash portion of the purchase price with borrowings on the Credit Facility. The Elite Acquisition is expected to close in the third quarter of 2019 subject to certain closing conditions and the consummation of the Harvest Sale (see below).

Harvest Sale

On June 23, 2019, we entered into an asset purchase agreement with Harvest pursuant to which Harvest will acquire from us approximately 80,000 active and idle compression horsepower, vehicles and parts inventory for consideration of $30 million to be paid in cash. The Harvest Sale is expected to close in the third quarter of 2019, subject to customary closing conditions.

During the three and six months ended June 30, 2019, we incurred transaction costs of $2.5 million related to the Elite Acquisition and Harvest Sale, which is reflected in transaction-related costs in our condensed consolidated statements of operations.

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Recent Accounting Developments

6 Months Ended

Jun. 30, 2019

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Recent Accounting Developments

2. Recent Accounting Developments

Accounting Standards Updates Implemented

Leases

ASC 842 Leases establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. Under the new guidance, lessor accounting is largely unchanged. We adopted ASC 842 Leases on January 1, 2019 using the modified retrospective transition method and elected the practical expedient package to not reassess (i) whether any expired or existing contracts are or contain leases, (ii) lease classification of any expired or existing leases and (iii) initial direct costs for any existing leases. We did not elect the practical expedient to use hindsight in determining the lease term. Adoption of ASC 842 Leases resulted in recognition of an operating lease ROU asset of $18.6 million and an operating lease liability of $20.0 million in our condensed consolidated balance sheet at January 1, 2019. The difference of $1.4 million related to accrued rent and prepaid lease payments recorded to our consolidated balance sheet as of December 31, 2018. We did not recognize any finance lease ROU assets or liabilities upon adoption of ASC 842 Leases. There was no impact to our condensed consolidated statements of operations, equity or cash flows upon adoption. Comparative information has not been recast and continues to be reported under the accounting standards in effect for those periods.

ASC 842 Leases also provides a practical expedient, elected by class of underlying asset, to not separate lease and nonlease components and instead account for those components as a single component if certain conditions are met. ASC 842 Leases also provides clarification for lessors on whether ASC 842 Leases or ASC 606 Revenue is applicable to the combined component based on determination of the predominant component. We have concluded that for our contract operations services agreements, in which we are a lessor, the services nonlease component is predominant over the compression unit lease component and therefore ongoing recognition of these agreements will continue to follow the ASC 606 Revenue guidance. We have also elected, as a lessee, to not separate lease and nonlease components as it relates to our facility leases.

In addition, we have made an accounting policy election, as permitted by ASC 842 Leases, to not apply the recognition requirements of ASC 842 Leases to leases with an initial term of 12 months or less.

Accounting Standards Updates Not Yet Implemented

In August 2018, the FASB issued ASU 2018-13 which amends the required fair value measurements disclosures related to valuation techniques and inputs used, uncertainty in measurement and changes in measurements applied. These amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. We are currently evaluating the impact of ASU 2018-13 on our consolidated financial statements and footnote disclosures.

In June 2016, the FASB issued ASU 2016-13 which changes the impairment model for most financial assets and certain other instruments, including trade and other receivables, held-to-maturity debt securities and loans, and requires entities to use a new forward-looking expected loss model that will result in earlier recognition of allowance for losses. For public entities that meet the definition of an SEC filer, ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and early adoption is permitted. Entities will apply ASU 2016-13 provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. We are currently evaluating the impact of ASU 2016-13 on our consolidated financial statements and footnote disclosures.

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Discontinued Operations

6 Months Ended

Jun. 30, 2019

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations

3. 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 which include, but are not limited to, the tax matters agreement. The tax matters agreement governs the respective rights, responsibilities and obligations of Exterran Corporation and us with respect to tax liabilities and benefits, tax attributes, the preparation and filing of tax returns, the control of audits and other tax proceedings and certain other matters regarding taxes. Subject to the provisions of this agreement, we and Exterran Corporation 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.

As of June 30, 2019 and December 31, 2018, we had $8.5 million and $7.1 million, respectively, 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 $8.5 million and $7.1 million related to these unrecognized tax benefits recorded to noncurrent assets associated with discontinued operations as of June 30, 2019 and December 31, 2018, respectively.

The following table summarizes the statements of operations data for discontinued operations (in thousands):

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Other income, net	$	—	$	(1,432	)
Provision for income taxes	—		1,705
Loss from discontinued operations, net of tax	$	—	$	(273	)

The following table summarizes the balance sheet data for discontinued operations (in thousands):

	June 30, 2019		December 31, 2018
Other current assets	$	—	$	300
Other assets	8,467		7,063
Total assets associated with discontinued operations	$	8,467	$	7,363
Accrued liabilities	$	269	$	297
Deferred income taxes	8,467		7,063
Total liabilities associated with discontinued operations	$	8,736	$	7,360

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Inventory

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Inventory

4. Inventory

Inventory consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Parts and supplies	$	64,403	$	65,645
Work in progress	9,756		10,688
Inventory	$	74,159	$	76,333

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Property, Plant and Equipment, Net

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment, Net

5. Property, Plant and Equipment, Net

Property, plant and equipment, net, consisted of the following (in thousands):

	June 30, 2019			December 31, 2018
Compression equipment, facilities and other fleet assets	$	3,472,300		$	3,323,465
Land and buildings	46,517			47,067
Transportation and shop equipment	105,941			103,766
Computer hardware and software	93,434			92,174
Other	13,111			11,880
Property, plant and equipment	3,731,303			3,578,352
Accumulated depreciation	(1,436,933		)	(1,407,314		)
Property, plant and equipment, net	$	2,294,370		$	2,171,038

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Long-Term Debt

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Long-Term Debt

6. Long-Term Debt

Long-term debt consisted of the following (in thousands):

	June 30, 2019			December 31, 2018
Credit Facility	$	792,500		$	839,500
2027 Notes	500,000			—
Less: Deferred financing costs, net of amortization	(8,550		)	—
	491,450			—
2022 Notes	350,000			350,000
Less: Debt discount, net of amortization	(2,411		)	(2,766		)
Less: Deferred financing costs, net of amortization	(2,725		)	(3,133		)
	344,864			344,101
2021 Notes	—			350,000
Less: Debt discount, net of amortization	—			(1,789		)
Less: Deferred financing costs, net of amortization	—			(2,311		)
	—			345,900
Long-term debt	$	1,628,814		$	1,529,501

Archrock Credit Facility

In April 2018, in connection with the Merger and Amendment No. 1, the Archrock Credit Facility was terminated. As a result of the termination, we recorded a debt extinguishment loss of $2.5 million during the three and six months ended June 30, 2018. We incurred $0.2 million in commitment fees in 2018 prior to the facility’s termination and were in compliance with all covenants through its closing.

Credit Facility

As of June 30, 2019, there were $15.2 million letters of credit outstanding under the Credit Facility and the applicable margin on borrowings outstanding was 2.7%. The weighted average annual interest rate on the outstanding balance under the Credit Facility, excluding the effect of interest rate swaps, was 5.3% and 5.4% at June 30, 2019 and December 31, 2018, respectively. We incurred $0.6 million in commitment fees on the daily unused amount of the Credit Facility during each of the three months ended June 30, 2019 and 2018 and $1.1 million during each of the six months ended June 30, 2019 and 2018.

We must maintain the following consolidated financial ratios, as defined in the Credit Facility agreement:

EBITDA to Interest Expense	2.5 to 1.0
Senior Secured Debt to EBITDA	3.5 to 1.0
Total Debt to EBITDA
Through fiscal year 2019	5.75 to 1.0
Through second quarter of 2020	5.50 to 1.0
Thereafter (1)	5.25 to 1.0

——————

⁽¹⁾  Subject to a temporary increase to 5.5 to 1.0 for any quarter during which an acquisition satisfying certain thresholds is completed and for the two quarters immediately following such quarter.

As of June 30, 2019, the ratio requirements above did not constrain our undrawn capacity and as such, all of the $442.3 million of undrawn capacity was available for additional borrowings. As of June 30, 2019, we were in compliance with all covenants under the Credit Facility agreement.

2027 Notes

On March 21, 2019, we completed a private offering of $500.0 million aggregate principal amount of 6.875% senior notes due April 2027 and received net proceeds of $491.2 million after deducting issuance costs. The $8.8 million of issuance costs were recorded as deferred financing costs within long-term debt in our condensed consolidated balance sheets and are being amortized to interest expense in our condensed consolidated statement of operations over the term of the notes. The net proceeds were used to repay borrowings outstanding under the Credit Facility as of March 31, 2019.

The 2027 Notes have not been and will not be registered under the Securities Act or the securities laws of any other jurisdiction and may not be offered or sold in the U.S. except pursuant to a registration exemption under the Securities Act and applicable state securities laws. We offered and issued the 2027 Notes only to qualified institutional buyers in accordance with Rule 144A under the Securities Act and to certain non-U.S. persons outside the U.S. in accordance with Regulation S under the Securities Act.

The 2027 Notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by us and all of our existing subsidiaries, other than Archrock Partners, L.P. and APLP Finance Corp., which are co-issuers of the 2027 Notes, and certain of our future subsidiaries. The 2027 Notes and the guarantees rank equally in right of payment with all of our and the guarantors’ existing and future senior indebtedness.

The 2027 Notes may be redeemed at any time, in whole or in part, at specified redemption prices and make-whole premiums, plus any accrued and unpaid interest.

Redemption of 2021 Notes

On April 5, 2019, the 2021 Notes were redeemed at 100% of their $350.0 million aggregate principal amount plus accrued and unpaid interest of $0.2 million with borrowings from the Credit Facility. We recorded a debt extinguishment loss of $3.7 million related to the redemption during the three and six months ended June 30, 2019.

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Revenue from Contract with Customers

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Revenue from Contracts with Customers

7. Revenue from Contracts with Customers

Disaggregation of Revenue

The following table presents our revenue from contracts with customers disaggregated by revenue source (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contract operations (1):
0 - 1,000 horsepower per unit	$	63,683	$	59,600	$	127,422	$	119,192
1,001 - 1,500 horsepower per unit	75,598		68,948		149,938		135,178
Over 1,500 horsepower per unit	45,969		35,904		89,394		70,314
Other (2)	1,008		998		2,011		1,963
Total contract operations (3)	186,258		165,450		368,765		326,647
Aftermarket services (1):
Services	33,281		36,706		66,802		68,913
OTC parts and components sales	18,851		24,714		38,982		43,350
Total aftermarket services (4)	52,132		61,420		105,784		112,263
Total revenue	$	238,390	$	226,870	$	474,549	$	438,910

——————

⁽¹⁾  We operate in two segments: contract operations and aftermarket services. See Note 19 (“Segments”) for further details regarding our segments.

⁽²⁾  Primarily related to fees associated with Archrock-owned non-compressor equipment.

⁽³⁾  Included $2.2 million and $1.4 million for the three months ended June 30, 2019 and 2018, respectively, and $4.4 million and $2.7 million for the six months ended June 30, 2019 and 2018, respectively, related to billable maintenance on Archrock-owned units that was recognized at a point in time. All other contract operations revenue is recognized over time.

⁽⁴⁾  All service 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, 2019, we had $312.9 million of remaining performance obligations related to our contract operations segment. We have elected to apply the practical expedient to not consider the effects of the time value of money, as the expected time between the transfer of services and payment for such services is less than one year. The remaining performance obligations will be recognized through 2024 as follows (in thousands):

	2019		2020		2021		2022		2023		2024		Total
Remaining performance obligations	$	148,323	$	117,192	$	37,632	$	8,295	$	1,122	$	293	$	312,857

As of June 30, 2019 we have elected to apply the practical expedient to 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 Balances

As of June 30, 2019 and December 31, 2018, our receivables from contracts with customers, net of allowance for doubtful accounts, were $139.3 million and $142.1 million, respectively. As of June 30, 2019 and December 31, 2018, our contract liabilities were $11.6 million and $17.1 million, respectively, which are included in deferred revenue and other liabilities in our condensed consolidated balance sheets. Freight billings to customers for the transport of compressor assets and milestone billings on aftermarket services often result in a contract liability. We recognized $25.2 million of our December 31, 2018 contract liability balance as revenue during the six months ended June 30, 2019, primarily related to freight billings and aftermarket services.

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Leases

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Leases

8. Leases

We determine if an arrangement is a lease at inception. We determine lease classification and recognize ROU assets and liabilities on the lease commencement date based on the present value of lease payments over the lease term. As the discount rate implicit in the lease is rarely readily determinable, we estimate our incremental borrowing rate using information available at commencement date in determining the present value of the lease payments. The lease term includes options to extend when we are reasonably certain to exercise the option. Short-term leases, those with an initial term of 12 months or less, are not recorded on the balance sheet. Variable costs such as our proportionate share of actual costs for utilities, common area maintenance, property taxes and insurance are not included in the lease liability and are recognized in the period in which they are incurred. Operating lease expense for lease payments is recognized on a straight-line basis over the term of the lease. As of June 30, 2019, all of our leases were operating.

The facility leases discussed below, of which we are the lessee, contain lease and nonlease components for which we have elected the practical expedient to account for as a single lease component, as the nonlease components are not significant to the total consideration in the contract and separating the nonlease component would have no effect on lease classification. As it relates to our contract operations services agreements in which we are the lessor, the services nonlease component is predominant over the compression unit lease component and therefore ongoing recognition of these agreements will continue to follow the ASC 606 Revenue guidance.

We have operating leases and subleases for office space, temporary housing, storage and shops. Our leases have remaining lease terms of one to 11 years and most include options to extend the lease term, at our discretion, for an additional three to five years. We are not, however, reasonably certain that we will exercise any of the options to extend and as such, they have not been included in the remaining lease terms.

Balance sheet information related to our operating leases was as follows (in thousands):

	Classification	June 30, 2019
ROU assets	Operating lease ROU assets	$	18,022
Lease liabilities
Current	Accrued liabilities	$	2,827
Noncurrent	Operating lease liabilities	16,647
Total lease liabilities		$	19,474

The components of lease cost were as follows (in thousands):

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Operating lease cost	$	970	$	1,944
Short-term lease cost	65		238
Variable lease cost	560		942
Total lease cost	$	1,595	$	3,124

Cash flow and noncash information related to our operating leases were as follows (in thousands):

	Six Months Ended June 30, 2019
Operating cash flows - cash paid for amounts included in the measurement of operating lease liabilities	$	2,802
Operating lease ROU assets obtained in exchange for new lease liabilities	862

Other supplemental information related to our operating leases was as follows:

	June 30, 2019
Weighted average remaining lease term (in years)	8.5
Weighted average discount rate	5.3	%

Remaining maturities of lease liabilities governed under ASC 842 Leases as of June 30, 2019 were as follows (in thousands):

2019	$	1,569
2020	3,763
2021	3,538
2022	2,439
2023	2,131
2024	1,740
Thereafter	9,310
Total lease payments	24,490
Less: Interest	(5,016		)
Total lease liabilities under ASC 842 Leases	$	19,474

Maturities of lease liabilities governed under ASC 840 Leases as of December 31, 2018 were as follows (in thousands):

2019	$	4,317
2020	3,980
2021	3,562
2022	2,433
2023	2,170
Thereafter	11,935
Total lease liabilities under ASC 840 Leases	$	28,397

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Derivatives

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivatives

9. Derivatives

We are exposed to market risks associated with changes in the variable interest rate of the 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.

At June 30, 2019, the following interest rate swaps, entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates, were outstanding (in millions):

Expiration Date	Notional Value
May 2020	$	100
March 2022	300
	$	400

The counterparties to the derivative agreements are major financial institutions. We monitor the credit quality of these financial institutions and do not expect non-performance by any counterparty, although such non-performance could have a material adverse effect on us. We have no collateral posted for the derivative instruments.

We have designated these interest rate swaps as cash flow hedging instruments. Changes in the fair value of the interest rate swaps 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 this 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 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 perform quarterly qualitative prospective and retrospective hedge effectiveness assessments unless facts and circumstances related to the hedging relationships change such that we can no longer assert qualitatively that the cash flow hedge relationships were and continue to be highly effective. We estimate that $0.3 million of the deferred pre-tax gain attributable to interest rate swaps included in accumulated other comprehensive income at June 30, 2019 will be reclassified into earnings as interest income at then-current values during the next 12 months as the underlying hedged transactions occur.

As of June 30, 2019, the weighted average effective fixed interest rate on the interest rate swaps was 1.8%.

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

	June 30, 2019			December 31, 2018
Other current assets	$	336		$	3,185
Other assets	—			4,122
Total derivative assets	$	336		$	7,307
Other liabilities	$	(1,574	)	$	—

The following tables present the effect of the derivative instruments designated as cash flow hedging instruments on our condensed consolidated statements of operations (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Pre-tax gain (loss) recognized in other comprehensive income (loss)	$	(4,529	)	$	2,245		$	(6,828	)	$	6,941
Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	791			(39		)	1,717			(513		)

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Total amount of interest expense in which the effects of cash flow hedges are recorded	$	25,954	$	23,337	$	49,571	$	45,884
Amount of gain reclassified from accumulated other comprehensive income (loss) into interest expense	791		207		1,717		153

See Note 10 (“Fair Value Measurements”) and Note 17 (“Accumulated Other Comprehensive Income (Loss)”) for further details on our derivative instruments.

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Fair Value Measurements

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurements

10. Fair Value Measurements

Assets and Liabilities Measured at Fair Value on a Recurring Basis

On a quarterly basis, our interest rate swaps are valued based on the income approach (discounted cash flow) using market observable inputs, including London Interbank Offered Rate forward curves. These fair value measurements are classified as Level 2. The following table presents our interest rate swaps asset and liability measured at fair value on a recurring basis, with pricing levels as of the date of valuation (in thousands):

	June 30, 2019			December 31, 2018
Interest rate swaps asset	$	336		$	7,307
Interest rate swaps liability	(1,574		)	—

Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis

During the six months ended June 30, 2019, we recorded non-recurring fair value measurements related to our idle and previously-culled compressor units. Our estimate of the compressor units’ 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 fair value of our impaired compressor units was $1.6 million and $2.3 million at June 30, 2019 and December 31, 2018, respectively. See Note 11 (“Long-Lived 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 the Credit Facility approximates fair value due to its variable interest rate. The fair value of these outstanding borrowings was estimated using a discounted cash flow analysis based on interest rates offered on loans with similar terms to borrowers of similar credit quality, which are Level 3 inputs.

The fair value of our fixed rate debt was estimated based on quoted prices in inactive markets and is considered a Level 2 measurement. The following table summarizes the carrying amount and fair value of our fixed rate debt (in thousands):

	June 30, 2019		December 31, 2018
Carrying amount of fixed rate debt (1)	$	836,314	$	690,001
Fair value of fixed rate debt	881,000		674,000

——————

⁽¹⁾ 

Carrying amounts are shown net of unamortized debt discounts and unamortized deferred financing costs. See Note 6 (“Long-Term Debt”).

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Long-Lived Asset Impairment

6 Months Ended

Jun. 30, 2019

Asset Impairment Charges [Abstract]

Long-Lived Asset Impairment

11. Long-Lived 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 compressor units from our active fleet, indicate that the carrying amount of an asset may not be recoverable.

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 compressor units 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 impairment review as recorded in our contract operations segment (dollars in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Idle compressor units retired from the active fleet	160		120		180		165
Horsepower of idle compressor units retired from the active fleet	41,000		27,000		56,000		50,000
Impairment recorded on idle compressor units retired from the active fleet	$	8,632	$	6,953	$	11,724	$	11,663

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Hosting Arrangements

6 Months Ended

Jun. 30, 2019

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

Hosting Arrangements

12. Hosting Arrangements

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

Certain costs incurred for the implementation of our hosting arrangements that are service contracts are being capitalized and will be amortized on a straight-line basis over the term of the respective contract. As of June 30, 2019 and December 31, 2018, we had $2.0 million and $0.4 million, respectively, of implementation costs related to our hosting arrangements that are service contracts capitalized to other assets in our condensed consolidated balance sheets. Amortization of the capitalized implementation costs will be recorded to SG&A in our consolidated statements of income and is expected to begin in future periods as the individual contract components become ready for their intended use.

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Income Taxes

6 Months Ended

Jun. 30, 2019

Income Tax Disclosure [Abstract]

Income Taxes

13. Income Taxes

The year-to-date effective tax rate for the six months ended June 30, 2019 differed significantly from our statutory rate primarily due to the reduction of a valuation allowance, which was recorded to offset the tax effect of the increase in book income in the six months ended June 30, 2019, as well as the release of an unrecognized tax benefit due to the settlement of a tax audit.

Unrecognized Tax Benefits

As of June 30, 2019, we believe it is reasonably possible that $1.9 million of our unrecognized tax benefits, including penalties, interest and discontinued operations, will be reduced prior to June 30, 2020 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 which could materially differ from this estimate.

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Earnings Per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Share

14. Earnings per Share

Net Income (Loss) Attributable to Archrock Common Stockholders per Common Share

Basic net income (loss) attributable to Archrock common stockholders 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) attributable to Archrock common stockholders per common share is determined by dividing net income (loss) attributable to Archrock common stockholders 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, no effect is given to participating securities because they do not have a contractual obligation to participate in our losses.

Diluted net income (loss) attributable to Archrock common stockholders 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 employee stock purchase plan unless their effect would be anti-dilutive.

The following table summarizes net income (loss) attributable to Archrock common stockholders used in the calculation of basic and diluted net income (loss) per common share (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income (loss) from continuing operations attributable to Archrock stockholders	$	11,423		$	1,937		$	31,152		$	(1,879	)
Loss from discontinued operations, net of tax	—			—			(273		)	—
Net income (loss) attributable to Archrock stockholders	11,423			1,937			30,879			(1,879		)
Less: Net income attributable to participating securities	(261		)	(157		)	(574		)	(313		)
Net income (loss) attributable to Archrock common stockholders	$	11,162		$	1,780		$	30,305		$	(2,192	)

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Weighted average common shares outstanding including participating securities	130,330		112,995		130,276		92,130
Less: Weighted average participating securities outstanding	(2,002	)	(1,699	)	(2,015	)	(1,541	)
Weighted average common shares outstanding used in basic net income (loss) per common share	128,328		111,296		128,261		90,589
Net dilutive potential common shares issuable:
On exercise of options and vesting of performance-based restricted stock units	25		99		33		*
On settlement of employee stock purchase plan shares	1		7		3		*
Weighted average common shares outstanding used in diluted net income (loss) per common share	128,354		111,402		128,297		90,589

——————

* Excluded from diluted net income (loss) per common share as their inclusion would have been anti-dilutive.

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

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Net dilutive potential common shares issuable:
On exercise of options where exercise price is greater than average market value for the period	154	187	154	205
On exercise of options and vesting of performance-based restricted stock units	—	—	—	89
On settlement of employee stock purchase plan shares	—	—	—	5
Net dilutive potential common shares issuable	154	187	154	299

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Equity

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Equity

15. Equity

Merger Transaction

In April 2018, we completed the Merger and acquired all of the common units of the Partnership not owned by us prior to the Merger. As a result of the Merger, the Partnership’s common units are no longer publicly traded. The 2021 Notes and 2022 Notes were not impacted by the Merger.

As we controlled the Partnership prior to the Merger and continue to control the Partnership after the Merger, we accounted for the change in our ownership interest in the Partnership as an equity transaction in the second quarter of 2018 and no gain or loss was recognized in our condensed consolidated statements of operations as a result of the Merger. The tax effects of the Merger were reported as adjustments to other assets, noncurrent assets associated with discontinued operations, deferred income taxes, additional paid-in capital and other comprehensive income.

The following table presents the effects of changes in our ownership interest in the Partnership on the equity attributable to Archrock stockholders:

	Six Months Ended June 30, 2018
Net loss attributable to Archrock stockholders	$	(1,879	)
Decrease in Archrock stockholders’ additional paid-in capital for purchase of Partnership common units	52,815
Change from net loss attributable to Archrock stockholders and transfers from noncontrolling interest	$	50,936

Prior to the Merger, public unitholders held a 57% ownership interest in the Partnership and we owned the remaining 43% equity interest. The earnings of the Partnership that were attributed to its common units held by the public prior to the Merger are reflected in net income attributable to the noncontrolling interest in our condensed consolidated statements of operations.

Cash Dividends

The following table summarizes our dividends declared and paid in each of the quarterly periods of 2019 and 2018:

	Dividends per Common Share		Total Dividends (in thousands)
2018
Q1	$	0.120	$	8,532
Q2	0.120		15,486
Q3	0.132		17,114
Q4	0.132		17,156
2019
Q1	$	0.132	$	17,231
Q2	0.132		17,206

On July 24, 2019, our board of directors declared a quarterly dividend of $0.145 per share of common stock to be paid on August 14, 2019 to stockholders of record at the close of business on August 7, 2019.

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Stock-Based Compensation

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Stock-Based Compensation

16. Stock-Based Compensation

We have granted restricted stock, restricted stock units and performance-based restricted stock units to employees and non-employee directors under the Archrock, Inc. 2013 Stock Incentive Plan.

The following table presents restricted stock, restricted stock unit, performance-based restricted stock unit and cash-settled performance unit activity during the six months ended June 30, 2019:

	Shares (in thousands)		Weighted Average Grant Date Fair Value Per Share
Non-vested awards, January 1, 2019	1,728		$	9.68
Granted	1,383		10.01
Vested	(402	)	6.33
Canceled	(153	)	10.33
Non-vested awards, June 30, 2019 (1)(2)	2,556		10.35

——————

⁽¹⁾  Non-vested awards as of June 30, 2019 are comprised of 451,000 cash-settled restricted stock units and cash-settled performance units and 2,105,000 restricted shares and stock-settled performance units.

⁽²⁾  During the three months ended June 30, 2019, the settlement terms of 99,631 performance units, with grant dates in 2018 and 2019, were modified from settlement in stock to cash. The change in award settlement from stock to cash was the only modification to these awards; the vesting, forfeiture and all other terms and conditions were unchanged. The modification resulted in a $0.2 million reclassification from additional paid-in capital to other current liabilities in our condensed consolidated balance sheets and had an immaterial impact on our condensed consolidated statements of operations.

As of June 30, 2019, we expect $18.5 million of unrecognized compensation cost related to unvested restricted stock, stock-settled restricted stock units, performance units, cash-settled restricted stock units and cash-settled performance units to be recognized over the weighted-average period of 2.2 years.

Total stock-based compensation expense consisted of the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Equity awards	$	1,512	$	1,969	$	3,869	$	3,763
Liability awards	640		666		1,606		967
Total stock-based compensation	$	2,152	$	2,635	$	5,475	$	4,730

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Accumulated Other Comprehensive Income (Loss)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Accumulated Other Comprehensive Income (Loss)

17. Accumulated Other Comprehensive Income (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 consists of changes in the fair value of our interest rate swap derivative instruments, net of tax, which are designated as cash flow hedges, amortization of terminated interest rate swaps and adjustments related to changes in our ownership of the Partnership.

The following table presents the changes in accumulated other comprehensive income (loss) of our derivative cash flow hedges, net of tax and excluding noncontrolling interest, during the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2019			2018		2019			2018
Beginning accumulated other comprehensive income	$	2,548		$	3,194	$	5,773		$	1,197
Gain (loss) recognized in other comprehensive income (loss), net of tax provision of $0, $472, $0 and $888, respectively (1)	(4,529		)	479		(6,828		)	2,051
(Gain) loss reclassified from accumulated other comprehensive income (loss) to interest expense, net of tax benefit of $0, $(8), $0 and $(53), respectively (1)(2)	(791		)	31		(1,717		)	456
Merger-related adjustments (3)	—			5,670		—			5,670
Other comprehensive income (loss) attributable to Archrock stockholders	(5,320		)	6,180		(8,545		)	8,177
Ending accumulated other comprehensive income (loss)	$	(2,772	)	$	9,374	$	(2,772	)	$	9,374

——————

⁽¹⁾  Included adjustments of $1.1 million and $1.8 million related to an increase in the valuation allowance recorded to offset the tax effect of other comprehensive loss recorded during the three and six months ended June 30, 2019, respectively.

⁽²⁾  Included stranded tax effects resulting from the Tax Cuts and Jobs Act, which was implemented in December 2017, of $0.3 million reclassified to accumulated deficit during the six months ended June 30, 2018.

⁽³⁾  Pursuant to the Merger, we reclassified a gain of $5.7 million from noncontrolling interest to accumulated other comprehensive income (loss) related to the fair value of our derivative instruments that was previously attributed to public ownership of the Partnership.

See Note 9 (“Derivatives”) for further details on our interest rate swap derivative instruments.

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Commitments and Contingencies

6 Months Ended

Jun. 30, 2019

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

18. 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 2019 through the third quarter of 2020 and maximum potential future payments of $2.3 million. As of June 30, 2019, 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 each of June 30, 2019 and December 31, 2018, we accrued $4.5 million 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 June 30, 2019 and December 31, 2018, we recorded an indemnification liability (including penalties and interest), in addition to the tax contingency above, of $2.7 million and $2.6 million, respectively, for our share of non-income-based tax contingencies related to audits being managed by Exterran Corporation.

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.

Litigation and Claims

In the ordinary course of business, we are involved in various pending or threatened legal actions. While management is unable to predict the ultimate outcome of these actions, it believes 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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Segments

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Segments

19. 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 part 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.

The following table presents revenue and gross margin by segment during the three and six months ended June 30, 2019 and 2018 (in thousands): 

	Contract Operations		Aftermarket Services		Total
Three months ended June 30, 2019
Revenue	$	186,258	$	52,132	$	238,390
Gross margin	115,737		9,917		125,654
Three months ended June 30, 2018
Revenue	$	165,450	$	61,420	$	226,870
Gross margin	97,641		10,627		108,268
Six months ended June 30, 2019
Revenue	$	368,765	$	105,784	$	474,549
Gross margin	223,509		19,667		243,176
Six months ended June 30, 2018
Revenue	$	326,647	$	112,263	$	438,910
Gross margin	194,243		19,133		213,376

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Total gross margin	$	125,654		$	108,268		$	243,176		$	213,376
Less:
Selling, general and administrative	28,618			26,649			57,607			54,157
Depreciation and amortization	45,482			43,331			89,588			87,786
Long-lived asset impairment	8,632			6,953			11,724			11,663
Restatement and other charges	24			(1,076		)	445			(591		)
Interest expense	25,954			23,337			49,571			45,884
Debt extinguishment loss	3,653			2,450			3,653			2,450
Transaction-related costs	2,687			5,686			2,867			9,811
Other income, net	(2,010		)	(1,644		)	(2,215		)	(2,789		)
Income before income taxes	$	12,614		$	2,582		$	29,936		$	5,005

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Recent Accounting Developments (Policies)

6 Months Ended

Jun. 30, 2019

New Accounting Pronouncements and Changes in Accounting Principles [Abstract]

Accounting Standards Updates Implemented and Accounting Standards Updates Not Yet Implemented

Accounting Standards Updates Implemented

Leases

ASC 842 Leases establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet. Leases are classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. Under the new guidance, lessor accounting is largely unchanged. We adopted ASC 842 Leases on January 1, 2019 using the modified retrospective transition method and elected the practical expedient package to not reassess (i) whether any expired or existing contracts are or contain leases, (ii) lease classification of any expired or existing leases and (iii) initial direct costs for any existing leases. We did not elect the practical expedient to use hindsight in determining the lease term. Adoption of ASC 842 Leases resulted in recognition of an operating lease ROU asset of $18.6 million and an operating lease liability of $20.0 million in our condensed consolidated balance sheet at January 1, 2019. The difference of $1.4 million related to accrued rent and prepaid lease payments recorded to our consolidated balance sheet as of December 31, 2018. We did not recognize any finance lease ROU assets or liabilities upon adoption of ASC 842 Leases. There was no impact to our condensed consolidated statements of operations, equity or cash flows upon adoption. Comparative information has not been recast and continues to be reported under the accounting standards in effect for those periods.

ASC 842 Leases also provides a practical expedient, elected by class of underlying asset, to not separate lease and nonlease components and instead account for those components as a single component if certain conditions are met. ASC 842 Leases also provides clarification for lessors on whether ASC 842 Leases or ASC 606 Revenue is applicable to the combined component based on determination of the predominant component. We have concluded that for our contract operations services agreements, in which we are a lessor, the services nonlease component is predominant over the compression unit lease component and therefore ongoing recognition of these agreements will continue to follow the ASC 606 Revenue guidance. We have also elected, as a lessee, to not separate lease and nonlease components as it relates to our facility leases.

In addition, we have made an accounting policy election, as permitted by ASC 842 Leases, to not apply the recognition requirements of ASC 842 Leases to leases with an initial term of 12 months or less.

Accounting Standards Updates Not Yet Implemented

In August 2018, the FASB issued ASU 2018-13 which amends the required fair value measurements disclosures related to valuation techniques and inputs used, uncertainty in measurement and changes in measurements applied. These amendments are effective for all entities for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. We are currently evaluating the impact of ASU 2018-13 on our consolidated financial statements and footnote disclosures.

In June 2016, the FASB issued ASU 2016-13 which changes the impairment model for most financial assets and certain other instruments, including trade and other receivables, held-to-maturity debt securities and loans, and requires entities to use a new forward-looking expected loss model that will result in earlier recognition of allowance for losses. For public entities that meet the definition of an SEC filer, ASU 2016-13 is effective for fiscal years beginning after December 15, 2019 and early adoption is permitted. Entities will apply ASU 2016-13 provisions as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. We are currently evaluating the impact of ASU 2016-13 on our consolidated financial statements and footnote disclosures.

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Discontinued Operations (Tables)

6 Months Ended

Jun. 30, 2019

Discontinued Operations and Disposal Groups [Abstract]

Summary of operating results and balance sheet data for discontinued operations

The following table summarizes the statements of operations data for discontinued operations (in thousands):

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Other income, net	$	—	$	(1,432	)
Provision for income taxes	—		1,705
Loss from discontinued operations, net of tax	$	—	$	(273	)

The following table summarizes the balance sheet data for discontinued operations (in thousands):

	June 30, 2019		December 31, 2018
Other current assets	$	—	$	300
Other assets	8,467		7,063
Total assets associated with discontinued operations	$	8,467	$	7,363
Accrued liabilities	$	269	$	297
Deferred income taxes	8,467		7,063
Total liabilities associated with discontinued operations	$	8,736	$	7,360

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Inventory (Tables)

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Schedule of inventory, net of reserves

Inventory consisted of the following (in thousands):

	June 30, 2019		December 31, 2018
Parts and supplies	$	64,403	$	65,645
Work in progress	9,756		10,688
Inventory	$	74,159	$	76,333

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Property, Plant and Equipment, Net (Tables)

6 Months Ended

Jun. 30, 2019

Property, Plant and Equipment [Abstract]

Schedule of property, plant and equipment, net

Property, plant and equipment, net, consisted of the following (in thousands):

	June 30, 2019			December 31, 2018
Compression equipment, facilities and other fleet assets	$	3,472,300		$	3,323,465
Land and buildings	46,517			47,067
Transportation and shop equipment	105,941			103,766
Computer hardware and software	93,434			92,174
Other	13,111			11,880
Property, plant and equipment	3,731,303			3,578,352
Accumulated depreciation	(1,436,933		)	(1,407,314		)
Property, plant and equipment, net	$	2,294,370		$	2,171,038

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Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2019

Debt Disclosure [Abstract]

Schedule of long-term debt

We must maintain the following consolidated financial ratios, as defined in the Credit Facility agreement:

EBITDA to Interest Expense	2.5 to 1.0
Senior Secured Debt to EBITDA	3.5 to 1.0
Total Debt to EBITDA
Through fiscal year 2019	5.75 to 1.0
Through second quarter of 2020	5.50 to 1.0
Thereafter (1)	5.25 to 1.0

——————

⁽¹⁾  Subject to a temporary increase to 5.5 to 1.0 for any quarter during which an acquisition satisfying certain thresholds is completed and for the two quarters immediately following such quarter.

Long-term debt consisted of the following (in thousands):

	June 30, 2019			December 31, 2018
Credit Facility	$	792,500		$	839,500
2027 Notes	500,000			—
Less: Deferred financing costs, net of amortization	(8,550		)	—
	491,450			—
2022 Notes	350,000			350,000
Less: Debt discount, net of amortization	(2,411		)	(2,766		)
Less: Deferred financing costs, net of amortization	(2,725		)	(3,133		)
	344,864			344,101
2021 Notes	—			350,000
Less: Debt discount, net of amortization	—			(1,789		)
Less: Deferred financing costs, net of amortization	—			(2,311		)
	—			345,900
Long-term debt	$	1,628,814		$	1,529,501

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Revenue from Contract with Customers (Tables)

6 Months Ended

Jun. 30, 2019

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table presents our revenue from contracts with customers disaggregated by revenue source (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Contract operations (1):
0 - 1,000 horsepower per unit	$	63,683	$	59,600	$	127,422	$	119,192
1,001 - 1,500 horsepower per unit	75,598		68,948		149,938		135,178
Over 1,500 horsepower per unit	45,969		35,904		89,394		70,314
Other (2)	1,008		998		2,011		1,963
Total contract operations (3)	186,258		165,450		368,765		326,647
Aftermarket services (1):
Services	33,281		36,706		66,802		68,913
OTC parts and components sales	18,851		24,714		38,982		43,350
Total aftermarket services (4)	52,132		61,420		105,784		112,263
Total revenue	$	238,390	$	226,870	$	474,549	$	438,910

——————

⁽¹⁾  We operate in two segments: contract operations and aftermarket services. See Note 19 (“Segments”) for further details regarding our segments.

⁽²⁾  Primarily related to fees associated with Archrock-owned non-compressor equipment.

⁽³⁾  Included $2.2 million and $1.4 million for the three months ended June 30, 2019 and 2018, respectively, and $4.4 million and $2.7 million for the six months ended June 30, 2019 and 2018, respectively, related to billable maintenance on Archrock-owned units that was recognized at a point in time. All other contract operations revenue is recognized over time.

⁽⁴⁾ 

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

Remaining Performance Obligation

The remaining performance obligations will be recognized through 2024 as follows (in thousands):

	2019		2020		2021		2022		2023		2024		Total
Remaining performance obligations	$	148,323	$	117,192	$	37,632	$	8,295	$	1,122	$	293	$	312,857

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Leases (Tables)

6 Months Ended

Jun. 30, 2019

Leases [Abstract]

Leases Balance Sheet Location

Balance sheet information related to our operating leases was as follows (in thousands):

	Classification	June 30, 2019
ROU assets	Operating lease ROU assets	$	18,022
Lease liabilities
Current	Accrued liabilities	$	2,827
Noncurrent	Operating lease liabilities	16,647
Total lease liabilities		$	19,474

Components of Lease Costs

The components of lease cost were as follows (in thousands):

	Three Months Ended June 30, 2019		Six Months Ended June 30, 2019
Operating lease cost	$	970	$	1,944
Short-term lease cost	65		238
Variable lease cost	560		942
Total lease cost	$	1,595	$	3,124

Cash flow and noncash information related to our operating leases were as follows (in thousands):

	Six Months Ended June 30, 2019
Operating cash flows - cash paid for amounts included in the measurement of operating lease liabilities	$	2,802
Operating lease ROU assets obtained in exchange for new lease liabilities	862

Other supplemental information related to our operating leases was as follows:

	June 30, 2019
Weighted average remaining lease term (in years)	8.5
Weighted average discount rate	5.3	%

Operating Lease Maturity Schedule

Remaining maturities of lease liabilities governed under ASC 842 Leases as of June 30, 2019 were as follows (in thousands):

2019	$	1,569
2020	3,763
2021	3,538
2022	2,439
2023	2,131
2024	1,740
Thereafter	9,310
Total lease payments	24,490
Less: Interest	(5,016		)
Total lease liabilities under ASC 842 Leases	$	19,474

Maturities of Lease Liability Under ASC 840

Maturities of lease liabilities governed under ASC 840 Leases as of December 31, 2018 were as follows (in thousands):

2019	$	4,317
2020	3,980
2021	3,562
2022	2,433
2023	2,170
Thereafter	11,935
Total lease liabilities under ASC 840 Leases	$	28,397

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Derivatives (Tables)

6 Months Ended

Jun. 30, 2019

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of interest rate swaps

At June 30, 2019, the following interest rate swaps, entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates, were outstanding (in millions):

Expiration Date	Notional Value
May 2020	$	100
March 2022	300
	$	400

Effect of derivative instruments on consolidated financial position

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

	June 30, 2019			December 31, 2018
Other current assets	$	336		$	3,185
Other assets	—			4,122
Total derivative assets	$	336		$	7,307
Other liabilities	$	(1,574	)	$	—

Effect of derivative instruments on results of operations

The following tables present the effect of the derivative instruments designated as cash flow hedging instruments on our condensed consolidated statements of operations (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Pre-tax gain (loss) recognized in other comprehensive income (loss)	$	(4,529	)	$	2,245		$	(6,828	)	$	6,941
Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	791			(39		)	1,717			(513		)

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Total amount of interest expense in which the effects of cash flow hedges are recorded	$	25,954	$	23,337	$	49,571	$	45,884
Amount of gain reclassified from accumulated other comprehensive income (loss) into interest expense	791		207		1,717		153

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Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2019

Fair Value Disclosures [Abstract]

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

The following table presents our interest rate swaps asset and liability measured at fair value on a recurring basis, with pricing levels as of the date of valuation (in thousands):

	June 30, 2019			December 31, 2018
Interest rate swaps asset	$	336		$	7,307
Interest rate swaps liability	(1,574		)	—

Schedule of carrying value and estimated fair value of debt instruments

The following table summarizes the carrying amount and fair value of our fixed rate debt (in thousands):

	June 30, 2019		December 31, 2018
Carrying amount of fixed rate debt (1)	$	836,314	$	690,001
Fair value of fixed rate debt	881,000		674,000

——————

⁽¹⁾ 

Carrying amounts are shown net of unamortized debt discounts and unamortized deferred financing costs. See Note 6 (“Long-Term Debt”).

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Long-Lived Assets Impairment (Tables)

6 Months Ended

Jun. 30, 2019

Asset Impairment Charges [Abstract]

Details of Impairment of Long-Lived Assets Held and Used by Asset

The following table presents the results of our impairment review as recorded in our contract operations segment (dollars in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Idle compressor units retired from the active fleet	160		120		180		165
Horsepower of idle compressor units retired from the active fleet	41,000		27,000		56,000		50,000
Impairment recorded on idle compressor units retired from the active fleet	$	8,632	$	6,953	$	11,724	$	11,663

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Earnings Per Share (Tables)

6 Months Ended

Jun. 30, 2019

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

The following table summarizes net income (loss) attributable to Archrock common stockholders used in the calculation of basic and diluted net income (loss) per common share (in thousands):

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Net income (loss) from continuing operations attributable to Archrock stockholders	$	11,423		$	1,937		$	31,152		$	(1,879	)
Loss from discontinued operations, net of tax	—			—			(273		)	—
Net income (loss) attributable to Archrock stockholders	11,423			1,937			30,879			(1,879		)
Less: Net income attributable to participating securities	(261		)	(157		)	(574		)	(313		)
Net income (loss) attributable to Archrock common stockholders	$	11,162		$	1,780		$	30,305		$	(2,192	)

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

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Weighted average common shares outstanding including participating securities	130,330		112,995		130,276		92,130
Less: Weighted average participating securities outstanding	(2,002	)	(1,699	)	(2,015	)	(1,541	)
Weighted average common shares outstanding used in basic net income (loss) per common share	128,328		111,296		128,261		90,589
Net dilutive potential common shares issuable:
On exercise of options and vesting of performance-based restricted stock units	25		99		33		*
On settlement of employee stock purchase plan shares	1		7		3		*
Weighted average common shares outstanding used in diluted net income (loss) per common share	128,354		111,402		128,297		90,589

——————

*

Excluded from diluted net income (loss) per common share as their inclusion would have been anti-dilutive.

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

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

	Three Months Ended June 30,		Six Months Ended June 30,
	2019	2018	2019	2018
Net dilutive potential common shares issuable:
On exercise of options where exercise price is greater than average market value for the period	154	187	154	205
On exercise of options and vesting of performance-based restricted stock units	—	—	—	89
On settlement of employee stock purchase plan shares	—	—	—	5
Net dilutive potential common shares issuable	154	187	154	299

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Equity (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Effects of changes in ownership interest

The following table presents the effects of changes in our ownership interest in the Partnership on the equity attributable to Archrock stockholders:

	Six Months Ended June 30, 2018
Net loss attributable to Archrock stockholders	$	(1,879	)
Decrease in Archrock stockholders’ additional paid-in capital for purchase of Partnership common units	52,815
Change from net loss attributable to Archrock stockholders and transfers from noncontrolling interest	$	50,936

Summary of entity's dividends per common share

The following table summarizes our dividends declared and paid in each of the quarterly periods of 2019 and 2018:

	Dividends per Common Share		Total Dividends (in thousands)
2018
Q1	$	0.120	$	8,532
Q2	0.120		15,486
Q3	0.132		17,114
Q4	0.132		17,156
2019
Q1	$	0.132	$	17,231
Q2	0.132		17,206

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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2019

Share-based Payment Arrangement [Abstract]

Schedule of Restricted Stock, Restricted Stock Unit, Performance Unit, Cash Settled Restricted Stock Unit and Cash Settled Performance Unit Activity

The following table presents restricted stock, restricted stock unit, performance-based restricted stock unit and cash-settled performance unit activity during the six months ended June 30, 2019:

	Shares (in thousands)		Weighted Average Grant Date Fair Value Per Share
Non-vested awards, January 1, 2019	1,728		$	9.68
Granted	1,383		10.01
Vested	(402	)	6.33
Canceled	(153	)	10.33
Non-vested awards, June 30, 2019 (1)(2)	2,556		10.35

——————

⁽¹⁾  Non-vested awards as of June 30, 2019 are comprised of 451,000 cash-settled restricted stock units and cash-settled performance units and 2,105,000 restricted shares and stock-settled performance units.

⁽²⁾ 

During the three months ended June 30, 2019, the settlement terms of 99,631 performance units, with grant dates in 2018 and 2019, were modified from settlement in stock to cash. The change in award settlement from stock to cash was the only modification to these awards; the vesting, forfeiture and all other terms and conditions were unchanged. The modification resulted in a $0.2 million reclassification from additional paid-in capital to other current liabilities in our condensed consolidated balance sheets and had an immaterial impact on our condensed consolidated statements of operations.

Schedule of Allocation of Total Stock-based Compensation

Total stock-based compensation expense consisted of the following (in thousands):

	Three Months Ended June 30,				Six Months Ended June 30,
	2019		2018		2019		2018
Equity awards	$	1,512	$	1,969	$	3,869	$	3,763
Liability awards	640		666		1,606		967
Total stock-based compensation	$	2,152	$	2,635	$	5,475	$	4,730

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Accumulated Other Comprehensive Income (Loss) (Tables)

6 Months Ended

Jun. 30, 2019

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

The following table presents the changes in accumulated other comprehensive income (loss) of our derivative cash flow hedges, net of tax and excluding noncontrolling interest, during the three and six months ended June 30, 2019 and 2018 (in thousands):

	Three Months Ended June 30,					Six Months Ended June 30,
	2019			2018		2019			2018
Beginning accumulated other comprehensive income	$	2,548		$	3,194	$	5,773		$	1,197
Gain (loss) recognized in other comprehensive income (loss), net of tax provision of $0, $472, $0 and $888, respectively (1)	(4,529		)	479		(6,828		)	2,051
(Gain) loss reclassified from accumulated other comprehensive income (loss) to interest expense, net of tax benefit of $0, $(8), $0 and $(53), respectively (1)(2)	(791		)	31		(1,717		)	456
Merger-related adjustments (3)	—			5,670		—			5,670
Other comprehensive income (loss) attributable to Archrock stockholders	(5,320		)	6,180		(8,545		)	8,177
Ending accumulated other comprehensive income (loss)	$	(2,772	)	$	9,374	$	(2,772	)	$	9,374

——————

⁽¹⁾  Included adjustments of $1.1 million and $1.8 million related to an increase in the valuation allowance recorded to offset the tax effect of other comprehensive loss recorded during the three and six months ended June 30, 2019, respectively.

⁽²⁾  Included stranded tax effects resulting from the Tax Cuts and Jobs Act, which was implemented in December 2017, of $0.3 million reclassified to accumulated deficit during the six months ended June 30, 2018.

⁽³⁾ 

Pursuant to the Merger, we reclassified a gain of $5.7 million from noncontrolling interest to accumulated other comprehensive income (loss) related to the fair value of our derivative instruments that was previously attributed to public ownership of the Partnership.

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Segments (Tables)

6 Months Ended

Jun. 30, 2019

Segment Reporting [Abstract]

Revenue and other financial information by reportable segment

The following table presents revenue and gross margin by segment during the three and six months ended June 30, 2019 and 2018 (in thousands): 

	Contract Operations		Aftermarket Services		Total
Three months ended June 30, 2019
Revenue	$	186,258	$	52,132	$	238,390
Gross margin	115,737		9,917		125,654
Three months ended June 30, 2018
Revenue	$	165,450	$	61,420	$	226,870
Gross margin	97,641		10,627		108,268
Six months ended June 30, 2019
Revenue	$	368,765	$	105,784	$	474,549
Gross margin	223,509		19,667		243,176
Six months ended June 30, 2018
Revenue	$	326,647	$	112,263	$	438,910
Gross margin	194,243		19,133		213,376

Reconciliation of net income (loss) to gross margin

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

	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Total gross margin	$	125,654		$	108,268		$	243,176		$	213,376
Less:
Selling, general and administrative	28,618			26,649			57,607			54,157
Depreciation and amortization	45,482			43,331			89,588			87,786
Long-lived asset impairment	8,632			6,953			11,724			11,663
Restatement and other charges	24			(1,076		)	445			(591		)
Interest expense	25,954			23,337			49,571			45,884
Debt extinguishment loss	3,653			2,450			3,653			2,450
Transaction-related costs	2,687			5,686			2,867			9,811
Other income, net	(2,010		)	(1,644		)	(2,215		)	(2,789		)
Income before income taxes	$	12,614		$	2,582		$	29,936		$	5,005

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Organization (Details) hp in Thousands, $ in Thousands	3 Months Ended			6 Months Ended
	Sep. 30, 2019 USD ($) hp shares	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)
Accounting Policies [Abstract]
Number of reportable segments | segment				2
Property, Plant and Equipment
Payments to acquire assets				$ 234,972	$ 132,172
Proceeds from sale of property, plant and equipment				21,954	19,193
Transaction-related costs		$ 2,687	$ 5,686	2,867	$ 9,811
Forecasted | Disposed of by Sale | Harvest
Property, Plant and Equipment
Compressor units horsepower (horsepower | hp	80
Proceeds from sale of property, plant and equipment	$ 30,000
Elite Acquisition | Harvest
Property, Plant and Equipment
Transaction-related costs		$ 2,500		$ 2,500
Elite Acquisition | Forecasted
Property, Plant and Equipment
Compressor units horsepower (horsepower | hp	430
Payments to acquire assets	$ 205,000
Elite Acquisition | Forecasted | Common Stock
Property, Plant and Equipment
Shares issued as compensation for asset acquisition (shares) | shares	21,656,683

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Recent Accounting Developments (Narratives) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle\
ROU assets	$ 18,022
Lease liability	$ 19,474
Prepaid rent			$ 1,400
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle\
ROU assets		$ 18,600
Lease liability		$ 20,000

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Discontinued Operations (Narratives) (Details) - Exterran Corporation - Spinoff - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Discontinued Operations
Deferred income taxes	$ 8,467	$ 7,063
Indemnification asset	$ 8,467	$ 7,063

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Discontinued Operations - Income Statement Data for Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disposal Group, Including Discontinued Operation, Income Statement Disclosures
Loss from discontinued operations, net of tax	$ 0	$ 0	$ (273)	$ 0
Spinoff | Exterran Corporation
Disposal Group, Including Discontinued Operation, Income Statement Disclosures
Other income, net	0		(1,432)
Provision for income taxes	0		1,705
Loss from discontinued operations, net of tax	$ 0		$ (273)

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Discontinued Operations - Balance Sheet Data for Discontinued Operations (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Summary of balance sheet data for discontinued operations
Accrued liabilities	$ 269	$ 297
Spinoff | Exterran Corporation
Summary of balance sheet data for discontinued operations
Other current assets	0	300
Other assets	8,467	7,063
Total assets associated with discontinued operations	8,467	7,363
Accrued liabilities	269	297
Deferred income taxes	8,467	7,063
Total liabilities associated with discontinued operations	$ 8,736	$ 7,360

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Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Composition of Inventory net of reserves
Parts and supplies	$ 64,403	$ 65,645
Work in progress	9,756	10,688
Inventory	$ 74,159	$ 76,333

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Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment
Property, plant and equipment, gross	$ 3,731,303	$ 3,578,352
Accumulated depreciation	(1,436,933)	(1,407,314)
Property, plant and equipment, net	2,294,370	2,171,038
Compression equipment, facilities and other fleet assets
Property, Plant and Equipment
Property, plant and equipment, gross	3,472,300	3,323,465
Land and buildings
Property, Plant and Equipment
Property, plant and equipment, gross	46,517	47,067
Transportation and shop equipment
Property, Plant and Equipment
Property, plant and equipment, gross	105,941	103,766
Computer hardware and software
Property, Plant and Equipment
Property, plant and equipment, gross	93,434	92,174
Other
Property, Plant and Equipment
Property, plant and equipment, gross	$ 13,111	$ 11,880

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Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument
Long-term debt	$ 1,628,814	$ 1,529,501
Senior Notes | 2027 Notes
Debt Instrument
Long term debt gross	500,000	0
Less: Deferred financing costs, net of amortization	(8,550)	0
Long-term debt	491,450	0
Senior Notes | 2022 Notes
Debt Instrument
Long term debt gross	350,000	350,000
Less: Deferred financing costs, net of amortization	(2,725)	(3,133)
Less: Deferred financing costs, net of amortization	(2,411)	(2,766)
Long-term debt	344,864	344,101
Senior Notes | 2021 Notes
Debt Instrument
Long term debt gross	0	350,000
Less: Deferred financing costs, net of amortization	0	(2,311)
Less: Deferred financing costs, net of amortization	0	(1,789)
Long-term debt	0	345,900
Revolving Credit Facility | Credit Facility
Debt Instrument
Long-term debt	$ 792,500	$ 839,500

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Long-Term Debt - Archrock Credit Facility (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Line of Credit Facility
Debt extinguishment loss	$ 3,653	$ 2,450	$ 3,653	$ 2,450
Revolving Credit Facility | Terminated Credit Facility
Line of Credit Facility
Debt extinguishment loss	$ 2,500	$ 0	$ 2,500	0
Commitment fee amount				$ 200

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Long-Term Debt - Credit Facility (Details) - Revolving Credit Facility - Credit Facility - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Line of Credit Facility
Letter of credit outstanding	$ 15.2		$ 15.2
Debt instrument, variable rate (percentage)			2.70%
Debt instrument weighted average interest rate (percent)	5.30%		5.30%		5.40%
Commitment fee amount	$ 0.6	$ 0.6	$ 1.1	$ 1.1
Undrawn capacity under revolving credit facility	$ 442.3		$ 442.3

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Long-Term Debt - Debt Ratios (Details) - Revolving Credit Facility	6 Months Ended		12 Months Ended	21 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Mar. 30, 2022
Line of Credit Facility
EBITDA to Interest Expense		2.5
Senior Secured Debt to EBITDA		3.5
Forecasted
Line of Credit Facility
Total Debt to EBITDA ratio	5.50		5.75	5.25
Archrock Partners, L.P | Forecasted | Conditional Event
Line of Credit Facility
Total Debt to EBITDA ratio				5.5

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Long-Term Debt - Notes (Details) - USD ($)		6 Months Ended
	Mar. 21, 2019	Jun. 30, 2019	Jun. 30, 2018
Debt Instrument
Proceeds from borrowings of long-term debt		$ 1,254,000,000	$ 383,830,000
Senior Notes | 2027 Notes
Debt Instrument
Debt instrument face amount	$ 500,000,000.0
Interest rate (as a percent)	6.875%
Proceeds from borrowings of long-term debt	$ 491,200,000
Debt issuance cost	$ 8,800,000

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Long-Term Debt - Redemption of 2021 Notes (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Apr. 05, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Debt Instrument
Repayments of long-term debt				$ 1,151,000	$ 343,636
Debt extinguishment loss		$ 3,653	$ 2,450	3,653	$ 2,450
Senior Notes | 2021 Notes
Debt Instrument
Redemption rate (as a percent)	100.00%
Repayments of long-term debt	$ 350,000
Interest paid	$ 200
Debt extinguishment loss		$ 3,700		$ 3,700

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Revenue from Contract with Customers - Disaggregate Revenue (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment	Jun. 30, 2018 USD ($)
Disaggregation of Revenue
Number of reportable segments | segment			2
Contract revenue	$ 238,390	$ 226,870	$ 474,549	$ 438,910
Contract Operations | Transferred at point in time
Disaggregation of Revenue
Contract revenue	2,200	1,400	4,400	2,700
Contract Operations | Contract operations
Disaggregation of Revenue
Contract revenue	186,258	165,450	368,765	326,647
Contract Operations | 0 - 1,000 horsepower per unit
Disaggregation of Revenue
Contract revenue	63,683	59,600	127,422	119,192
Contract Operations | 1,001 - 1,500 horsepower per unit
Disaggregation of Revenue
Contract revenue	75,598	68,948	149,938	135,178
Contract Operations | Over 1,500 horsepower per unit
Disaggregation of Revenue
Contract revenue	45,969	35,904	89,394	70,314
Contract Operations | Other
Disaggregation of Revenue
Contract revenue	1,008	998	2,011	1,963
Aftermarket Services | Aftermarket services
Disaggregation of Revenue
Contract revenue	52,132	61,420	105,784	112,263
Aftermarket Services | Services
Disaggregation of Revenue
Contract revenue	33,281	36,706	66,802	68,913
Aftermarket Services | OTC parts and components sales
Disaggregation of Revenue
Contract revenue	$ 18,851	$ 24,714	$ 38,982	$ 43,350

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Revenue from Contract with Customers - Remaining Performance Obligation (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 312,857
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 148,323
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied, expected timing	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 117,192
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 37,632
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied, expected timing	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 8,295
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
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 from Contract with Customer [Abstract]
Remaining performance obligations	$ 1,122
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
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 from Contract with Customer [Abstract]
Remaining performance obligations	$ 293
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied, expected timing	1 year

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Revenue from Contract with Customers - Contract Balances (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disaggregation of Revenue
Accounts receivable, trade	$ 146,831		$ 147,985
Contract liability with customer	11,600		17,100
Deferred revenue recognized in earnings	25,227	$ 11,274
Contract with customers
Disaggregation of Revenue
Accounts receivable, trade	$ 139,300		$ 142,100

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Leases - (Narratives) (Details)	6 Months Ended
	Jun. 30, 2019
Minimum
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (in years)	1 year
Operating lease renewal term (in years)	3 years
Maximum
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term (in years)	11 years
Operating lease renewal term (in years)	5 years

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Leases - Balance Sheet Information (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Leases [Abstract]
ROU assets	$ 18,022
Lease liabilities
Current	2,827
Noncurrent	16,647
Total lease liabilities	$ 19,474

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Leases - Components of Lease Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 970	$ 1,944
Short-term lease cost	65	238
Variable lease cost	560	942
Total lease cost	$ 1,595	$ 3,124

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Leases - Cash Flow and Non-cash Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating cash flows - cash paid for amounts included in the measurement of operating lease liabilities	$ 2,802
Operating lease ROU assets obtained in exchange for new lease liabilities	$ 862

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Leases - Other Supplemental Information (Details)	Jun. 30, 2019
Leases [Abstract]
Weighted average remaining lease term (in years)	8 years 6 months
Weighted average discount rate (percent)	5.30%

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Leases - Maturity Schedule (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Operating Lease Liabilities, Payments Due
2019	$ 1,569
2020	3,763
2021	3,538
2022	2,439
2023	2,131
2024	1,740
Thereafter	9,310
Total lease payments	24,490
Less: Interest	(5,016)
Total lease liabilities under ASC 842 Leases	$ 19,474
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity
2019		$ 4,317
2020		3,980
2021		3,562
2022		2,433
2023		2,170
Thereafter		11,935
Total lease liabilities under ASC 840 Leases		$ 28,397

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Derivatives - Interest Rate Risk (Details) - Derivatives designated as hedging instruments $ in Millions	Jun. 30, 2019 USD ($)
Interest rate swaps
Notional Disclosures
Notional amount of interest rate swaps	$ 400
May 2020
Notional Disclosures
Notional amount of interest rate swaps	100
March 2022
Notional Disclosures
Notional amount of interest rate swaps	$ 300

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Derivatives - Interest Rate Risk (Narratives) (Details) - Derivatives designated as hedging instruments - Interest rate swaps $ in Millions	Jun. 30, 2019 USD ($)
Derivatives
Deferred pre-tax losses to be reclassified during next 12 months	$ 0.3
Weighted average effective fixed interest rate on interest rate swaps (as a percent)	1.80%

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Derivatives - Effect of Derivative Instruments on Balance Sheet (Details) - Derivatives designated as hedging instruments - Interest rate swaps - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value Asset
Derivative assets	$ 336	$ 7,307
Derivative liability	(1,574)	0
Other current assets
Fair Value Asset
Derivative assets	336	3,185
Other assets
Fair Value Asset
Derivative assets	$ 0	$ 4,122

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Derivatives - Effect of Derivative Instruments on Income Statement (Details) - Interest rate swaps - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Effect of derivative instruments on results of operations
Pre-tax gain (loss) recognized in other comprehensive income (loss)	$ (4,529)	$ 2,245	$ (6,828)	$ 6,941
Interest expense
Effect of derivative instruments on results of operations
Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	$ 791	$ (39)	$ 1,717	$ (513)

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Derivatives - Derivative Gain (Loss) Recognized in Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Effect of derivative instruments on results of operations
Interest expense	$ 25,954	$ 23,337	$ 49,571	$ 45,884
Accumulated Other Comprehensive Income (Loss) | Reclassification adjustments
Effect of derivative instruments on results of operations
Interest expense	$ (791)	$ (207)	$ (1,717)	$ (153)

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Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) - Recurring basis - Level 2 - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair value measurement of assets and liabilities
Interest rate swaps asset	$ 336	$ 7,307
Interest rate swaps liability	$ (1,574)	$ 0

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Fair Value Measurements (Narratives) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Nonrecurring basis | Level 3
Valuation of our interest rate swaps and impaired assets
Impaired long-lived assets	$ 1.6	$ 2.3
Impaired long-lived assets
Valuation of our interest rate swaps and impaired assets
Weighted average disposal period of impaired assets	4 years

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Fair Value Measurements - Fair Value of Debt (Details) - Fixed rate debt - Level 2 - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 836,314	$ 690,001
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 881,000	$ 674,000

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Long-Lived Asset Impairment (Details) hp in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) compressor_unit hp	Jun. 30, 2018 USD ($) compressor_unit hp	Jun. 30, 2019 USD ($) compressor_unit hp	Jun. 30, 2018 USD ($) compressor_unit hp
Impaired Long-Lived Assets Held and Used
Impairment recorded on idle compressor units retired from the active fleet	$ 8,632	$ 6,953	$ 11,724	$ 11,663
Idle compressor units
Impaired Long-Lived Assets Held and Used
Idle compressor units retired from the active fleet (compressors) | compressor_unit	160	120	180	165
Horsepower of idle compressor units retired from the active fleet (horsepower) | hp	41	27	56	50
Impairment recorded on idle compressor units retired from the active fleet	$ 8,632	$ 6,953	$ 11,724	$ 11,663

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Hosting Arrangements - (Narratives) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Capitalized implementation costs	$ 2.0	$ 0.4

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Income Taxes (Details) $ in Millions	Jun. 30, 2019 USD ($)
Income Tax Disclosure [Abstract]
Potential decrease in unrecognized tax benefit	$ 1.9

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Earnings Per Share - Net Income Attributable to Archrock Common Stockholders (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Summary of net income attributable to Archrock common stockholders used in the calculation of basic and diluted income per common share
Net income (loss) from continuing operations attributable to Archrock stockholders	$ 11,423	$ 1,937	$ 31,152	$ (1,879)
Loss from discontinued operations, net of tax	0	0	(273)	0
Net income (loss) attributable to Archrock stockholders	11,423	1,937	30,879	(1,879)
Less: Net income attributable to participating securities	(261)	(157)	(574)	(313)
Net income (loss) attributable to Archrock common stockholders	$ 11,162	$ 1,780	$ 30,305	$ (2,192)
Potential shares of common stock included in computing diluted income attributable to Exterran common stockholders per common share
Weighted average common shares outstanding including participating securities (in shares)	130,330	112,995	130,276	92,130
Less: Weighted average participating securities outstanding (in shares)	(2,002)	(1,699)	(2,015)	(1,541)
Weighted average common shares outstanding — used in basic income (loss) per common share (in shares)	128,328	111,296	128,261	90,589
Net dilutive potential common shares issuable:
Weighted average common shares outstanding - used in diluted income (loss) per common share (in shares)	128,354	111,402	128,297	90,589
On exercise of options and vesting of performance-based restricted stock units
Net dilutive potential common shares issuable:
On exercise of options (in shares)	25	99	33
On settlement of employee stock purchase plan shares
Net dilutive potential common shares issuable:
On exercise of options (in shares)	1	7	3

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Earnings Per Share - Anti-dilutive Shares (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)	154	187	154	299
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)	154	187	154	205
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)	0	0	0	89
On settlement of employee stock purchase plan shares
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)	0	0	0	5

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Equity (Narratives) (Details) - $ / shares	Jul. 24, 2019	Mar. 31, 2018
Class of Stock
Ownership percentage held by reporting entity (percent)		57.00%
Subsequent Event
Distributions
Dividend declared per common stock (in dollars per share)	$ 0.145
Archrock | Archrock, Inc.
Class of Stock
Ownership interest (percent)		43.00%

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Equity - Effects of Changes in Ownership Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Equity [Abstract]
Net loss attributable to Archrock stockholders	$ 11,423	$ 1,937	$ 30,879	$ (1,879)
Decrease in Archrock stockholders’ additional paid-in capital for purchase of Partnership common units				52,815
Change from net loss attributable to Archrock stockholders and transfers from noncontrolling interest				$ 50,936

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Equity - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Distributions
Dividends per Common Share (in dollars per share)	$ 0.132	$ 0.132	$ 0.132	$ 0.132	$ 0.120	$ 0.120	$ 0.264	$ 0.240
Total Dividends	$ 17,206	$ 17,231	$ 17,156	$ 17,114	$ 15,486	$ 8,532	$ 34,437	$ 24,018

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Stock-Based Compensation - Restricted Stock, Restricted Stock Units, and Performance Units Activity (Details) - Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units shares in Thousands	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Shares
Non-vested awards at the beginning of the period (in shares) | shares	1,728
Granted (in shares) | shares	1,383
Vested (in shares) | shares	(402)
Canceled (in shares) | shares	(153)
Non-vested awards at the end of the period (in shares) | shares	2,556
Weighted Average Grant Date Fair Value Per Share
Non-vested awards at the beginning of the period (in dollars per share) | $ / shares	$ 9.68
Granted (in dollars per share) | $ / shares	10.01
Vested (in dollars per share) | $ / shares	6.33
Canceled (in dollars per share) | $ / shares	10.33
Non-vested awards at the end of the period (in dollars per share) | $ / shares	$ 10.35

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Stock-Based Compensation - Restricted Stock, Restricted Stock Units, and Performance Units Activity (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Stock-Based Compensation
Additional paid-in capital	$ 3,182,247	$ 3,182,247	$ 3,177,982
Reclassification
Stock-Based Compensation
Additional paid-in capital	(200)	(200)
Other current liabilities	$ 200	$ 200
Performance units
Stock-Based Compensation
Converted (in shares)	99,631
Cash settled restricted stock units and cash settled performance units
Stock-Based Compensation
Non-vested awards at the end of the period (in shares)	451,000	451,000
Restricted stock shares, restricted stock units and performance units
Stock-Based Compensation
Non-vested awards at the end of the period (in shares)	2,105,000	2,105,000
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units
Stock-Based Compensation
Non-vested awards at the end of the period (in shares)	2,556,000	2,556,000	1,728,000
Unrecognized compensation
Expected unrecognized compensation cost related to unvested awards (in dollars)	$ 18,500	$ 18,500
Weighted-average period over which the expected unrecognized compensation cost related to unvested stock options will be recognized		2 years 2 months 12 days

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Stock-Based Compensation - Allocated Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Total stock-based compensation	$ 2,152	$ 2,635	$ 5,475	$ 4,730
Equity awards
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Total stock-based compensation	1,512	1,969	3,869	3,763
Liability awards
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost
Total stock-based compensation	$ 640	$ 666	$ 1,606	$ 967

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Increase (Decrease) in Stockholders' Equity
Beginning balance	$ 842,292	$ 737,873	$ 841,574	$ 735,618
Merger-related adjustments		5,670		5,670
Total other comprehensive income (loss)	(5,320)	7,475	(8,545)	12,182
Ending balance	832,890	830,725	832,890	830,725
Valuation adjustment	1,100		1,800
Adjustments related to TCJA				300
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity
Beginning balance	2,548	3,194	5,773	1,197
Gain (loss) recognized in other comprehensive income (loss), net of tax provision of $0, $472, $0 and $888, respectively (1)	(4,529)	479	(6,828)	2,051
(Gain) loss reclassified from accumulated other comprehensive income (loss) to interest expense, net of tax benefit of $0, $(8), $0 and $(53), respectively	(791)	31	(1,717)	456
Merger-related adjustments	0	5,670	0	5,670
Total other comprehensive income (loss)	(5,320)	6,180	(8,545)	8,177
Ending balance	(2,772)	9,374	(2,772)	9,374
Gain recognized in other comprehensive income, tax	0	472	0	888
Loss reclassified from accumulated other comprehensive loss, tax	$ 0	$ (8)	$ 0	$ (53)

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Commitments and Contingencies - Guarantees Not Recorded on Balance Sheet (Details) $ in Millions	Jun. 30, 2019 USD ($)
Performance bonds
Commitments and contingencies
Maximum potential undiscounted payments	$ 2.3

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Commitments and Contingencies (Narratives) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Loss contingency
Accrued liability for the outcomes of non-income based tax audits	$ 4.5	$ 4.5
Indemnification liability	$ 2.7	$ 2.6

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Segments (Narratives) (Details)	6 Months Ended
	Jun. 30, 2019 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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue and other financial information by reportable segment
Revenues	$ 238,390	$ 226,870	$ 474,549	$ 438,910
Total gross margin	125,654	108,268	243,176	213,376
Contract Operations
Revenue and other financial information by reportable segment
Total gross margin	115,737	97,641	223,509	194,243
Contract Operations | Contract operations
Revenue and other financial information by reportable segment
Revenues	186,258	165,450	368,765	326,647
Aftermarket Services
Revenue and other financial information by reportable segment
Total gross margin	9,917	10,627	19,667	19,133
Aftermarket Services | Aftermarket services
Revenue and other financial information by reportable segment
Revenues	$ 52,132	$ 61,420	$ 105,784	$ 112,263

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Segments - Reconciliation of Net Income to Gross Margin (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Reconciliation Net Income (Loss) to Gross Margin
Total gross margin	$ 125,654	$ 108,268	$ 243,176	$ 213,376
Less:
Selling, general and administrative	28,618	26,649	57,607	54,157
Depreciation and amortization	45,482	43,331	89,588	87,786
Long-lived asset impairment	8,632	6,953	11,724	11,663
Restatement and other charges	24	(1,076)	445	(591)
Interest expense	25,954	23,337	49,571	45,884
Debt extinguishment loss	3,653	2,450	3,653	2,450
Transaction-related costs	2,687	5,686	2,867	9,811
Other income, net	(2,010)	(1,644)	(2,215)	(2,789)
Income before income taxes	$ 12,614	$ 2,582	$ 29,936	$ 5,005

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Label	Element	Value
Accounting Standards Update 2014-09 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 14,666,000
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	14,666,000
Accounting Standards Update 2017-12 [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	383,000
Accounting Standards Update 2017-12 [Member] | Retained Earnings [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption	us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	$ 383,000