Archrock (AROC) 10-Q 1 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 25, 2018
Document and Entity Information
Entity Registrant Name	ARCHROCK, INC.
Entity Central Index Key	1,389,050
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		129,336,871
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 3,424	$ 10,536
Accounts receivable, trade, net of allowance of $1,507 and $1,794, respectively	141,781	113,416
Inventory	77,497	90,691
Other current assets	9,696	6,220
Current assets associated with discontinued operations	300	300
Total current assets	232,698	221,163
Property, plant and equipment, net	2,165,845	2,076,927
Intangible assets, net	56,289	68,872
Contract costs	36,482	0
Other long-term assets	33,655	27,782
Long-term assets associated with discontinued operations	6,421	13,263
Total assets	2,531,390	2,408,007
Current liabilities:
Accounts payable, trade	70,950	54,585
Accrued liabilities	74,879	71,116
Deferred revenue	12,909	4,858
Current liabilities associated with discontinued operations	297	297
Total current liabilities	159,035	130,856
Long-term debt	1,515,679	1,417,053
Deferred income taxes	2,845	97,943
Other long-term liabilities	19,612	20,116
Long-term liabilities associated with discontinued operations	6,421	6,421
Total liabilities	1,703,592	1,672,389
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, 135,572,682 and 76,880,862 shares issued, respectively	1,356	769
Additional paid-in capital	3,154,058	3,093,058
Accumulated other comprehensive income	10,333	1,197
Accumulated deficit	(2,259,489)	(2,241,243)
Treasury stock, 6,235,811 and 5,930,380 common shares, at cost, respectively	(78,460)	(76,732)
Total Archrock stockholders’ equity	827,798	777,049
Noncontrolling interest	0	(41,431)
Total equity	827,798	735,618
Total liabilities and equity	$ 2,531,390	$ 2,408,007

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Accounts receivable, allowance	$ 1,507	$ 1,794
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)	135,572,682	76,880,862
Treasury stock, common shares (in shares)	6,235,811	5,930,380

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Revenues	$ 232,372	$ 197,853	$ 671,282	$ 585,720
Total cost of sales (excluding depreciation and amortization)	119,099	110,437	344,633	310,118
Selling, general and administrative	26,298	29,108	80,455	81,823
Depreciation and amortization	43,779	47,463	131,565	142,483
Long-lived asset impairment	6,660	7,105	18,323	20,858
Restatement and other charges	396	566	(195)	3,287
Restructuring and other charges	0	422	0	1,245
Interest expense	23,518	22,892	69,402	66,817
Debt extinguishment loss	0	0	2,450	291
Merger-related costs	182	0	9,993	0
Other income, net	(660)	(2,716)	(3,449)	(4,472)
Income (loss) before income taxes	13,100	(17,424)	18,105	(36,730)
Provision for (benefit from) income taxes	3,126	(4,795)	1,913	(6,052)
Income (loss) from continuing operations	9,974	(12,629)	16,192	(30,678)
Loss from discontinued operations, net of tax	0	(54)	0	(54)
Net income (loss)	9,974	(12,683)	16,192	(30,732)
Less: Net (income) loss attributable to the noncontrolling interest	0	2,448	(8,097)	2,125
Net income (loss) attributable to Archrock stockholders	$ 9,974	$ (10,235)	$ 8,095	$ (28,607)
Basic and diluted net income (loss) per common share:
Net income (loss) attributable to Archrock common stockholders (in dollars per share)	$ 0.08	$ (0.15)	$ 0.07	$ (0.42)
Weighted average common shares outstanding:
Basic (in shares)	127,842	69,644	102,913	69,520
Diluted (in shares)	127,955	69,644	103,013	69,520
Dividends declared and paid per common share (in dollars per share)	$ 0.132	$ 0.1200	$ 0.372	$ 0.36
Contract Operations | Contract operations
Revenue:
Revenues	$ 169,509	$ 153,524	$ 496,156	$ 454,622
Total cost of sales (excluding depreciation and amortization)	69,056	71,951	201,460	198,291
Aftermarket Services | Aftermarket services
Revenue:
Revenues	62,863	44,329	175,126	131,098
Total cost of sales (excluding depreciation and amortization)	$ 50,043	$ 38,486	$ 143,173	$ 111,827

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 9,974	$ (12,683)	$ 16,192	$ (30,732)
Other comprehensive income, net of tax:
Interest rate swap gain, net of reclassifications to earnings	959	2,076	7,241	3,890
Amortization of terminated interest rate swaps	0	182	230	227
Merger-related adjustments	0	0	5,670	0
Adjustments from other changes in ownership of Partnership	0	32	0	32
Total other comprehensive income	959	2,290	13,141	4,149
Comprehensive income (loss)	10,933	(10,393)	29,333	(26,583)
Less: Comprehensive (income) loss attributable to the noncontrolling interest	0	1,289	(12,360)	(151)
Comprehensive income (loss) attributable to Archrock stockholders	$ 10,933	$ (9,104)	$ 16,973	$ (26,734)

CONDENSED CONSOLIDATED STATEM_3

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
Increase (Decrease) in Stockholders' Equity
Impact of adoption of Accounting Standard Update | ASU 2016-09	$ 1,290		$ 209			$ 1,081
Beginning balance at Dec. 31, 2016	684,928	$ 762	3,021,040	$ (1,678)	$ (73,944)	(2,227,214)	$ (34,038)
Increase (Decrease) in Stockholders' Equity
Treasury stock purchased	(2,208)				(2,208)
Cash dividends	(25,528)					(25,528)
Shares issued in employee stock purchase plan	195		195
Stock-based compensation, net of forfeitures	6,607	6	6,003				598
Stock options exercised	992	1	991
Contribution from Exterran Corporation	44,709		44,709
Net proceeds from sale of Partnership units, net of tax	49,726		17,638				32,088
Cash distribution to noncontrolling unitholders of the Partnership	(32,678)						(32,678)
Comprehensive loss
Net income (loss)	(30,732)					(28,607)	(2,125)
Derivative gain, net of reclassifications to earnings	3,890			1,614			2,276
Amortization of terminated interest rate swaps	227			227
Merger-related adjustments	0
Adjustments from other changes in ownership of Partnership	32			32
Ending balance at Sep. 30, 2017	701,450	769	3,090,785	195	(76,152)	(2,280,268)	(33,879)
Comprehensive loss
Net income (loss)	(12,683)
Derivative gain, net of reclassifications to earnings	2,076
Amortization of terminated interest rate swaps	182
Merger-related adjustments	0
Adjustments from other changes in ownership of Partnership	32
Ending balance at Sep. 30, 2017	701,450	769	3,090,785	195	(76,152)	(2,280,268)	(33,879)
Increase (Decrease) in Stockholders' Equity
Impact of adoption of Accounting Standard Update | ASU 2014-09	14,666					14,666
Impact of adoption of Accounting Standard Update | ASU 2017-12	383					383
Beginning balance at Dec. 31, 2017	735,618	769	3,093,058	1,197	(76,732)	(2,241,243)	(41,431)
Increase (Decrease) in Stockholders' Equity
Treasury stock purchased	(1,728)				(1,728)
Cash dividends	(41,132)					(41,132)
Shares issued in employee stock purchase plan	616	1	615
Stock-based compensation, net of forfeitures	5,318	10	5,372				(64)
Stock options exercised	262		262
Cash distribution to noncontrolling unitholders of the Partnership	(11,766)						(11,766)
Impact of adoption of ASU 2018-02				258		(258)
Merger-related adjustments	96,228	576	54,751				40,901
Comprehensive loss
Net income (loss)	16,192					8,095	8,097
Derivative gain, net of reclassifications to earnings	7,241			2,978			4,263
Amortization of terminated interest rate swaps	230			230
Merger-related adjustments	5,670			5,670			(5,700)
Adjustments from other changes in ownership of Partnership	0
Ending balance at Sep. 30, 2018	827,798	1,356	3,154,058	10,333	(78,460)	(2,259,489)	0
Comprehensive loss
Net income (loss)	9,974
Derivative gain, net of reclassifications to earnings	959
Amortization of terminated interest rate swaps	0
Merger-related adjustments	0
Adjustments from other changes in ownership of Partnership	0
Ending balance at Sep. 30, 2018	$ 827,798	$ 1,356	$ 3,154,058	$ 10,333	$ (78,460)	$ (2,259,489)	$ 0

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ 16,192	$ (30,732)
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Loss from discontinued operations, net of tax	0	(54)
Depreciation and amortization	131,565	142,483
Long-lived asset impairment	18,323	20,858
Inventory write-downs	1,185	1,665
Amortization of deferred financing costs	4,604	5,440
Amortization of debt discount	1,049	986
Amortization of terminated interest rate swaps	291	349
Debt extinguishment loss	2,450	291
Interest rate swaps	166	2,028
Stock-based compensation expense	5,567	6,117
Non-cash restructuring charges	0	1,245
Provision for doubtful accounts	1,544	2,909
Gain on sale of property, plant and equipment	(2,894)	(4,452)
Deferred income tax provision (benefit)	1,514	(5,611)
Amortization of contract costs	10,332	0
Non-cash deferred revenue	(17,420)	0
Changes in assets and liabilities:
Accounts receivable, trade	(21,591)	(9,835)
Inventory	3,800	(3,254)
Other current assets	1,251	53
Contract costs	(25,290)	0
Accounts payable and other liabilities	16,461	20,458
Deferred revenue	21,765	(63)
Other	(159)	66
Net cash provided by operating activities	170,705	151,055
Cash flows from investing activities:
Capital expenditures	(241,183)	(152,248)
Proceeds from sale of property, plant and equipment	24,061	22,681
Proceeds from insurance	252	0
Net cash used in investing activities	(216,870)	(129,567)
Cash flows from financing activities:
Proceeds from borrowings of long-term debt	536,830	1,066,500
Repayments of long-term debt	(440,636)	(1,118,000)
Payments for debt issuance costs	(3,332)	(14,855)
Payments for settlement of interest rate swaps that include financing elements	(61)	(1,405)
Net proceeds from sale of Partnership units	0	60,291
Dividends to Archrock stockholders	(41,132)	(25,528)
Distributions to noncontrolling partners in the Partnership	(11,766)	(32,678)
Proceeds from stock options exercised	262	992
Proceeds from stock issued under our employee stock purchase plan	616	195
Purchases of treasury stock	(1,728)	(2,208)
Contribution from Exterran Corporation	0	44,720
Net cash provided by (used in) financing activities	39,053	(21,976)
Net decrease in cash and cash equivalents	(7,112)	(488)
Cash and cash equivalents at beginning of period	10,536	3,134
Cash and cash equivalents at end of period	3,424	2,646
Supplemental disclosure of Non-Cash Transactions:
Issuance of Archrock common stock pursuant to Merger, net of tax	$ 55,327	$ 0

Organization and Basis of Prese

Organization and Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Organization and Basis of Presentation	1. Organization and Basis of Presentation We are a pure play U.S. natural gas contract operations services business and 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 primary business segments: contract operations and aftermarket services. In our contract operations business, we use our owned fleet of natural gas compression equipment to provide operations 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 U.S. GAAP for interim financial information 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 2017 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 Accounting Developments

Recent Accounting Developments	9 Months Ended
	Sep. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Developments	2. Recent Accounting Developments Accounting Standards Updates Implemented ASU 2018-05 was issued in March 2018 to clarify the income taxes disclosure requirements as they pertain to SAB 118, including the requirement to disclose a reasonable estimate, if determinable, of the tax effects of the TCJA in the reporting period in which the TCJA was enacted, as well as additional disclosures required in the following interim reporting periods if the measurement period approach is used. In accordance with ASU 2018-05, we disclosed a reasonable estimate of the income tax effects of the TCJA on our consolidated financial statements in our 2017 Form 10-K. We completed our analysis of the tax effects of the TCJA in the third quarter of 2018 with no material change to the amounts disclosed at December 31, 2017. See Note 14 (“Income Taxes”) for further details. On January 1, 2018, we adopted ASU 2018-02 which allows for a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA. As a result of the TCJA’s corporate rate reduction, we had $0.3 million of stranded tax effects in accumulated other comprehensive income related to our derivative instruments and terminated interest rate swaps, which we elected to reclassify to accumulated deficit. On January 1, 2018, we adopted ASU 2017-12 using the modified retrospective approach to existing cash flow hedge relationships as of January 1, 2018. ASU 2017-12 expands and refines hedge accounting for both financial and nonfinancial risk components, aligns the recognition and presentation of the effects of the hedging instrument and hedged item in the financial statements and eliminates the requirement to separately measure and report hedge ineffectiveness. As a result of the adoption of ASU 2017-12, we recognized a net gain of $0.4 million as a cumulative-effect adjustment to opening retained earnings and a corresponding adjustment to other comprehensive income (loss) to reverse the cumulative ineffectiveness previously recognized in interest expense. On January 1, 2018, we adopted ASU 2016-15 on a retrospective basis. ASU 2016-15 addresses diversity in practice and simplifies several elements of cash flow classification including how certain cash receipts and cash payments are classified in the statement of cash flows. ASU 2016-15 did not have an impact on our condensed consolidated statement of cash flow for the nine months ended September 30, 2017 . Revenue Recognition Update On January 1, 2018, we adopted the Revenue Recognition Update using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. We recognized the cumulative effect of initially applying the Revenue Recognition Update as an adjustment to the opening balance of retained earnings. For contracts that were modified before the effective date, we identified performance obligations on the basis of the current version of the contract, which included any contract modifications since inception. The application of the practical expedient for contract modifications did not have a material effect on the adjustment to retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Under previous guidance, contract operations revenue was recognized when earned, which generally occurs monthly when the service is provided under our customer contracts. Under the Revenue Recognition Update the timing of revenue recognition is impacted by contractual provisions for service availability guarantees of our compressor assets and re-billable costs associated with moving our compressor assets to a customer site. These changes are further discussed below and did not result in a material difference from previous practice for contract operations. The Revenue Recognition Update resulted in a significant change related to our aftermarket services operations, maintenance, overhaul and reconfiguration services. Under previous guidance, revenue was recognized on a completed contract basis as products were delivered and title was transferred or services were performed for the customer. Under the Revenue Recognition Update, these services are recognized as revenue over time, using output or input methods to measure the progress toward complete satisfaction of the performance obligation based on the nature of the goods or services being provided. The adoption did not result in a material difference in the amount or timing of revenues for aftermarket services parts and components sales. The Revenue Recognition Update provides guidance on contract costs that should be recognized as assets and amortized over the period that the related goods or services transfer to the customer. Certain costs that were previously expensed as incurred, such as sales commissions and freight charges to transport compressor assets, are deferred and amortized. The following table summarizes the cumulative impact of the adoption of the Revenue Recognition Update on the opening balance sheet (in thousands): December 31, 2017 Adjustments Due to the Revenue Recognition Update January 1, 2018 Assets Accounts receivable, trade $ 113,416 $ 7,883 $ 121,299 Inventory 90,691 (6,917 ) 83,774 Contract costs — 21,524 21,524 Liabilities Accrued liabilities $ 71,116 $ 209 $ 71,325 Deferred revenue 4,858 3,188 8,046 Deferred income taxes 97,943 4,427 102,370 Equity Accumulated deficit $ (2,241,243 ) $ 14,666 $ (2,226,577 ) The following tables summarize the impact of the application of the Revenue Recognition Update on our condensed consolidated balance sheet and condensed consolidated statements of operations (in thousands): September 30, 2018 Balance Sheet As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Assets Accounts receivable, trade $ 141,781 $ 123,079 $ 18,702 Inventory 77,497 94,528 (17,031 ) Contract costs 36,482 — 36,482 Liabilities Accounts payable, trade $ 70,950 $ 70,875 $ 75 Accrued liabilities 74,879 74,619 260 Deferred revenue 12,909 8,865 4,044 Deferred income taxes 2,845 2,570 275 Other long-term liabilities 19,612 19,595 17 Equity Additional paid-in capital (1) $ 3,154,058 $ 3,144,217 $ 9,841 Accumulated deficit (2,259,489 ) (2,283,130 ) 23,641 —————— (1) Represents the impact of the Revenue Recognition Update on net income attributable to noncontrolling interest which was reclassed to additional paid-in capital pursuant to the Merger. Three Months Ended September 30, 2018 Statement of Operations As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Revenue: Contract operations $ 169,509 $ 170,981 $ (1,472 ) Aftermarket services 62,863 59,623 3,240 Total revenue 232,372 230,604 1,768 Cost of sales (excluding depreciation and amortization): Contract operations 69,056 73,673 (4,617 ) Aftermarket services 50,043 47,973 2,070 Total cost of sales (excluding depreciation and amortization) 119,099 121,646 (2,547 ) Selling, general and administrative 26,298 26,924 (626 ) Provision for income taxes 3,126 2,617 509 Net income attributable to Archrock stockholders 9,974 5,542 4,432 Nine Months Ended September 30, 2018 Statement of Operations As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Revenue: Contract operations $ 496,156 $ 500,306 $ (4,150 ) Aftermarket services 175,126 161,065 14,061 Total revenue 671,282 661,371 9,911 Cost of sales (excluding depreciation and amortization): Contract operations 201,460 214,823 (13,363 ) Aftermarket services 143,173 132,984 10,189 Total cost of sales (excluding depreciation and amortization) 344,633 347,807 (3,174 ) Selling, general and administrative 80,455 82,051 (1,596 ) Provision for income taxes 1,913 (1,837 ) 3,750 Less: Net income attributable to the noncontrolling interest (8,097 ) (6,141 ) (1,956 ) Net income (loss) attributable to Archrock stockholders 8,095 (880 ) 8,975 Accounting Standards Updates Not Yet Implemented In August 2018, the FASB issued ASU 2018-15 which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). For public entities, ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of ASU 2018-15 on our consolidated financial statements and footnote disclosures and anticipate adopting this guidance on a prospective basis in the fourth quarter of 2018. 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 that 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 the 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. Leases ASC Topic 842 Leases establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be 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. ASC Topic 842 Leases is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach that involves recasting the comparative periods in the year of initial application is required for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain transition practical expedients available. In July 2018 the FASB provided an optional transition method that would allow adoption of the standard as of the effective date without restating prior periods. We intend to adopt ASC Topic 842 Leases on January 1, 2019 using the optional transition method and are currently assessing the transition practical expedients. Upon adoption, we will recognize the cumulative effect of adoption as an adjustment to the opening balance of our retained earnings. Comparative information will continue to be reported under the accounting standards in effect for those periods. Additionally, the July 2018 amendment provided lessors with a practical expedient to not separate nonlease components from the associated lease component and, instead, to account for those components as a single component if the nonlease components otherwise would be accounted for under the Revenue Recognition Update and certain conditions are met. The amendment also provided clarification on whether ASC Topic 842 or the Revenue Recognition Update is applicable to the combined component based on determination of the predominant component. An entity that elects the lessor practical expedient also should provide certain disclosures. We are evaluating the impact of the July 2018 amendment on our contract operations services agreements and have tentatively concluded that the services nonlease component is predominant, which would result in the ongoing recognition following the Revenue Recognition Update guidance. Our evaluation of the impact of adopting ASC Topic 842 Leases is ongoing. We have established a cross-functional implementation team to identify our lease population and are assessing changes to our internal control structure, business processes, systems and accounting policies that are necessary to implement the standard. We do not believe the standard will materially affect our consolidated statements of operations or cash flows. At September 30, 2018, adoption of ASC Topic 842 Leases would have resulted in recognition of a ROU asset of less than $25 million and a lease liability of a similar amount in our consolidated balance sheet. The amount of the ROU asset and the lease liability we ultimately recognize will depend on our lease portfolio as of the adoption date.

Revenue from Contract with Cust

Revenue from Contract with Customers	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	3. Revenue from Contracts with Customers Revenue Recognition Revenue is recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we are entitled to receive in exchange for those goods or services. Sales and usage-based taxes that are collected from the customer are excluded from revenue. The following table presents our revenue from contracts with customers disaggregated by revenue source (in thousands): Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Contract Operations (1) : 0 - 1000 horsepower per unit $ 60,725 $ 179,917 1,001 - 1,500 horsepower per unit 69,663 204,841 Over 1,500 horsepower per unit 38,053 108,367 Other (2) 1,068 3,031 Total contract operations (3) 169,509 496,156 Aftermarket Services (1) : Services 38,863 107,776 OTC parts and components sales 24,000 67,350 Total aftermarket services (4) 62,863 175,126 Total revenue (5) $ 232,372 $ 671,282 —————— (1) We operate in two segments: contract operations and aftermarket services. See Note 20 (“Segments”) for further details regarding our segments. (2) Primarily relates to fees associated with Archrock-owned non-compressor equipment. (3) Includes $1.6 million and $4.3 million for the three and nine months ended September 30, 2018 , respectively, related to billable maintenance on Archrock-owned units that was recognized at a point in time. All other revenue within contract operations 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. Contract Operations We provide comprehensive contract operations services including the personnel, equipment, tools, materials and supplies to meet our customers’ natural gas compression needs. Based on the operating specifications at the customer location and each customer's unique needs, these services include designing, sourcing, owning, installing, operating, servicing, repairing and maintaining equipment to provide natural gas compression services to our customers. Natural gas compression services are generally satisfied over time, as the customer simultaneously receives and consumes the benefits provided by these services. Our performance obligation is a series in which the unit of service is one month, as the customer receives substantially the same benefit each month from the services regardless of the type of service activity performed, which may vary. If the transaction price is based on a fixed fee, revenue is recognized monthly on a straight-line basis over the period that we are providing services to the customer. Amounts invoiced to customers for costs associated with moving our compressor assets to a customer site are also included in the transaction price and are amortized over the initial contract term. Variable consideration exists if customers are billed at a lesser standby rate when a unit is not running. We have elected to apply the invoicing practical expedient to recognize revenue for such variable consideration, as the invoice corresponds directly to the value transferred to the customer based on our performance completed to date. The rate for standby service is lower to reflect the decrease in costs and effort required to provide standby service when a unit is not running. We also perform billable maintenance service on our natural gas compression equipment at the customer’s request on an as-needed basis. The performance obligation is satisfied, and revenue is recognized at the agreed-upon transaction price, at the point in time when service is complete and the customer has accepted the work performed and can obtain the remaining benefits of the service that the unit will provide. As of September 30, 2018 , we had $267.3 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 2022 as follows (in thousands): 2018 2019 2020 2021 2022 Total Contract operations remaining performance obligations $ 93,227 $ 118,368 $ 46,404 $ 8,276 $ 1,073 $ 267,348 Aftermarket Services We provide a full range of services to support the compression needs of customers. We sell OTC parts and components and provide operations, maintenance, overhaul and reconfiguration services to customers who own compression equipment. We sell OTC parts and components needed for the maintenance or repair of customer-owned compression equipment. The performance obligation is generally satisfied at the point in time when delivery takes place and the customer obtains control of the part or component. The transaction price is the fixed sales price for the part stated in the contract. Revenue is recognized upon delivery, as we have a present right to payment and the customer has legal title. Our aftermarket service activities include operations, maintenance, overhaul and reconfiguration services on customer-owned compression equipment on an as-needed basis or as part of a monthly maintenance schedule. The service activities performance obligation is satisfied over time, as the work performed enhances the customer-controlled asset and another entity would not have to substantially re-perform the work we completed if they were to fulfill the remaining performance obligation. The transaction price may be a fixed monthly service fee, a fixed quoted fee or entirely variable, calculated on a time and materials basis. For service provided based on a fixed monthly fee, the performance obligation is a series in which the unit of service is one month. The customer receives substantially the same benefit each month from the service, regardless of the type of service activity performed, which may vary. As the progress towards satisfaction of the performance obligation is measured based on the passage of time, revenue is recognized monthly based on the fixed fee provided for in the contract. For service provided based on a quoted fixed fee, progress towards satisfaction of the performance obligation is measured using an input method based on the actual amount of labor and material costs incurred. The amount of the transaction price recognized as revenue each reporting period is determined by multiplying the transaction price by the ratio of actual costs incurred to date to total estimated costs expected for the service. Significant judgment is involved in the estimation of the progress to completion. Any adjustments to the measure of the progress to completion will be accounted for on a prospective basis. Changes to the scope of service is recognized as an adjustment to the transaction price in the period in which the change occurs. Service provided based on time and materials are generally short-term in nature and labor rates and parts pricing is agreed upon prior to commencing the service. We have elected to use the right-to-invoice practical expedient using an estimated gross margin percentage applied to actual costs incurred. The estimated gross margin percentage is fixed based on historical time and materials-based service. We evaluate the estimated gross margin percentage at the end of each reporting period and adjust the transaction price as appropriate. We believe these fee- and cost-based inputs fairly depict our efforts to provide aftermarket services and the amount of revenue recognized is representative of the transfer of service and value that the customer will have received as of the reporting date. As of September 30, 2018 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 Contract operations services are generally billed monthly at the beginning of the month in which service is being provided. For aftermarket services, billings will typically occur when parts are delivered or when service is complete; however, milestone billings may be used in longer-term projects. We recognize a contract asset when we have the right to consideration in exchange for goods or services transferred to a customer when the right is conditioned on something other than the passage of time. We recognize a contract liability when we have an obligation to transfer goods or services to a customer for which we have already received consideration. Freight billings to transport compressor assets and milestone billings on aftermarket services often result in a contract liability. As of September 30, and January 1, 2018 , our receivables from contracts with customers, net of allowance for doubtful accounts were $136.8 million and $115.6 million , respectively. As of September 30, and January 1, 2018 , our contract liabilities were $13.3 million and $9.0 million , respectively, which are included in deferred revenue and other long-term liabilities in our condensed consolidated balance sheets. The increase in the contract liability balance during the nine months ended September 30, 2018 was due to the deferral of $21.8 million primarily related to freight billings and aftermarket services, partially offset by $17.4 million recognized as revenue during the period primarily related to freight billings and aftermarket services. 7. Contract Costs We capitalize incremental costs to obtain a contract with a customer if we expect to recover those costs. Capitalized costs include commissions paid to our sales force to obtain contract operations contracts. We have applied the practical expedient to expense commissions paid for sales of service contracts and OTC parts and components within our aftermarket services segment as the amortization period is less than one year. As of September 30 , and January 1, 2018 , we recorded contract costs of $3.9 million and $2.3 million , respectively, associated with sales commissions. We capitalize costs incurred to fulfill a contract if those costs relate directly to a contract, enhance resources that we will use in satisfying performance obligations and if we expect to recover those costs. Capitalized costs incurred to fulfill our customer contracts include freight charges to transport compressor assets before transferring services to the customer and mobilization activities associated with our contract operations services. As of September 30 , and January 1, 2018 , we recorded contract costs of $32.6 million and $19.2 million , respectively, associated with freight and mobilization. Contract operations costs are amortized based on the transfer of service to which the assets relate, which is estimated to be 36 months based on average contract term, including anticipated renewals. We assess periodically whether the 36 -month estimate fairly represents the average contract term and adjust as appropriate. Aftermarket services fulfillment costs are recognized based on the percentage-of-completion method applicable to the customer contract. Contract costs associated with commissions are amortized to SG&A. Contract costs associated with freight and mobilization are amortized to cost of sales (excluding depreciation and amortization). During the three and nine months ended September 30, 2018 , we amortized $0.4 million and $1.1 million , respectively, related to commissions and $3.6 million and $9.2 million , respectively, related to freight and mobilization. During the three and nine months ended September 30, 2018 , there was no impairment loss recorded in relation to the costs capitalized.

Discontinued Operations

Discontinued Operations	9 Months Ended
	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Discontinued Operations	4. Discontinued Operations Spin-off of Exterran Corporation 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 separation and distribution agreement, the tax matters agreement and the supply agreement. Certain terms of these agreements are described as follows: • The separation and distribution agreement specifies our right to promptly receive payments from a subsidiary of Exterran Corporation based on a notional amount corresponding to payments received by Exterran Corporation’s subsidiaries from PDVSA Gas, in respect of the sale of Exterran Corporation’s subsidiaries’ and joint ventures’ previously nationalized assets after such amounts are collected by Exterran Corporation’s subsidiaries. During the nine months ended September 30, 2017 , we rece ived $19.7 million from Exterran Corporation pursuant to this term of the separation and distribution agreement. Exterran Corporation was due to receive the remaining principal amount as of September 30, 2018 of approximately $20.9 million . The separation and distribution agreement also specifies our right to receive a $25.0 million cash payment from a subsidiary of Exterran Corporation promptly following the occurrence of a qualified capital raise as defined in the Exterran Corporation credit agreement. Such a qualified capital raise occurred on April 4, 2017 and we received a cash payment of $25.0 million on April 11, 2017. Generally, the separation and distribution agreement provides for cross-indemnities principally designed to place financial responsibility for the obligations and liabilities of our business with us and financial responsibility for the obligations and liabilities of Exterran Corporation’s business with Exterran Corporation. Pursuant to the separation and distribution agreement, we and Exterran Corporation generally release the other party from all claims arising prior to the Spin-off that relate to the other party’s business. • 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 Exterran Corporation and we 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 September 30, 2018 , we classified $6.4 million of unrecognized tax benefits (including interest and penalties) as long-term liability associated with discontinued operations since it relates to operations of Exterran Corporation prior to the Spin-off. We have also recorded an offsetting $6.4 million indemnification asset related to this reserve as long-term assets associated with discontinued operations. • The supply agreement, which expired November 2017, set forth the terms under which Exterran Corporation provided manufactured equipment, including the design, engineering, manufacturing and sale of natural gas compression equipment, on an exclusive basis to us and the Partnership, subject to certain exceptions. For the nine months ended September 30, 2017 , we purchased $115.3 million of newly-manufactured compression equipment from Exterran Corporation. Other Discontinued Operations Activity In December 2013, we abandoned our contract water treatment business as part of our continued emphasis on simplification and focus on our core businesses. The abandonment of this business meets the criteria established for recognition as discontinued operations under GAAP. Therefore certain deferred tax assets related to our contract water treatment business have been reported as discontinued operations in our condensed consolidated balance sheets. This business was previously included in our contract operations segment. The following table summarizes the balance sheet data for discontinued operations (in thousands): September 30, 2018 December 31, 2017 Exterran Corporation Exterran Corporation Contract Water Treatment Business Total Other current assets $ 300 $ 300 $ — $ 300 Total current assets associated with discontinued operations 300 300 — 300 Other assets, net 6,421 6,421 — 6,421 Deferred income taxes (1) — — 6,842 6,842 Total assets associated with discontinued operations $ 6,721 $ 6,721 $ 6,842 $ 13,563 Other current liabilities $ 297 $ 297 $ — $ 297 Total current liabilities associated with discontinued operations 297 297 — 297 Deferred income taxes 6,421 6,421 — 6,421 Total liabilities associated with discontinued operations $ 6,718 $ 6,718 $ — $ 6,718 —————— (1) Reduced by $0.9 million for current period tax amortization and $5.9 million for a valuation allowance recorded as a result of the Merger, whereby we assessed the available positive and negative evidence and concluded, based on the weight of the evidence, that a valuation allowance was required on our resulting net deferred tax asset position, with an offsetting increase to additional paid-in capital in our condensed consolidated balance sheet as of September 30, 2018 . See Note 17 (“Equity”) for further details of the Merger.

Inventory

Inventory	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Inventory	5. Inventory Inventory consisted of the following amounts (in thousands): September 30, 2018 December 31, 2017 Parts and supplies $ 65,393 $ 72,528 Work in progress 12,104 18,163 Inventory $ 77,497 $ 90,691

Property, Plant and Equipment,

Property, Plant and Equipment, Net	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment, net	6. Property, Plant and Equipment, Net Property, plant and equipment, net, consisted of the following (in thousands): September 30, 2018 December 31, 2017 Compression equipment, facilities and other fleet assets $ 3,314,995 $ 3,192,363 Land and buildings 46,993 45,754 Transportation and shop equipment 101,868 100,133 Computer hardware and software 92,301 90,296 Other 12,867 12,419 Property, plant and equipment 3,569,024 3,440,965 Accumulated depreciation (1,403,179 ) (1,364,038 ) Property, plant and equipment, net $ 2,165,845 $ 2,076,927

Contract Costs

Contract Costs	9 Months Ended
	Sep. 30, 2018
Other Income and Expenses [Abstract]
Contract Costs	3. Revenue from Contracts with Customers Revenue Recognition Revenue is recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we are entitled to receive in exchange for those goods or services. Sales and usage-based taxes that are collected from the customer are excluded from revenue. The following table presents our revenue from contracts with customers disaggregated by revenue source (in thousands): Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Contract Operations (1) : 0 - 1000 horsepower per unit $ 60,725 $ 179,917 1,001 - 1,500 horsepower per unit 69,663 204,841 Over 1,500 horsepower per unit 38,053 108,367 Other (2) 1,068 3,031 Total contract operations (3) 169,509 496,156 Aftermarket Services (1) : Services 38,863 107,776 OTC parts and components sales 24,000 67,350 Total aftermarket services (4) 62,863 175,126 Total revenue (5) $ 232,372 $ 671,282 —————— (1) We operate in two segments: contract operations and aftermarket services. See Note 20 (“Segments”) for further details regarding our segments. (2) Primarily relates to fees associated with Archrock-owned non-compressor equipment. (3) Includes $1.6 million and $4.3 million for the three and nine months ended September 30, 2018 , respectively, related to billable maintenance on Archrock-owned units that was recognized at a point in time. All other revenue within contract operations 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. Contract Operations We provide comprehensive contract operations services including the personnel, equipment, tools, materials and supplies to meet our customers’ natural gas compression needs. Based on the operating specifications at the customer location and each customer's unique needs, these services include designing, sourcing, owning, installing, operating, servicing, repairing and maintaining equipment to provide natural gas compression services to our customers. Natural gas compression services are generally satisfied over time, as the customer simultaneously receives and consumes the benefits provided by these services. Our performance obligation is a series in which the unit of service is one month, as the customer receives substantially the same benefit each month from the services regardless of the type of service activity performed, which may vary. If the transaction price is based on a fixed fee, revenue is recognized monthly on a straight-line basis over the period that we are providing services to the customer. Amounts invoiced to customers for costs associated with moving our compressor assets to a customer site are also included in the transaction price and are amortized over the initial contract term. Variable consideration exists if customers are billed at a lesser standby rate when a unit is not running. We have elected to apply the invoicing practical expedient to recognize revenue for such variable consideration, as the invoice corresponds directly to the value transferred to the customer based on our performance completed to date. The rate for standby service is lower to reflect the decrease in costs and effort required to provide standby service when a unit is not running. We also perform billable maintenance service on our natural gas compression equipment at the customer’s request on an as-needed basis. The performance obligation is satisfied, and revenue is recognized at the agreed-upon transaction price, at the point in time when service is complete and the customer has accepted the work performed and can obtain the remaining benefits of the service that the unit will provide. As of September 30, 2018 , we had $267.3 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 2022 as follows (in thousands): 2018 2019 2020 2021 2022 Total Contract operations remaining performance obligations $ 93,227 $ 118,368 $ 46,404 $ 8,276 $ 1,073 $ 267,348 Aftermarket Services We provide a full range of services to support the compression needs of customers. We sell OTC parts and components and provide operations, maintenance, overhaul and reconfiguration services to customers who own compression equipment. We sell OTC parts and components needed for the maintenance or repair of customer-owned compression equipment. The performance obligation is generally satisfied at the point in time when delivery takes place and the customer obtains control of the part or component. The transaction price is the fixed sales price for the part stated in the contract. Revenue is recognized upon delivery, as we have a present right to payment and the customer has legal title. Our aftermarket service activities include operations, maintenance, overhaul and reconfiguration services on customer-owned compression equipment on an as-needed basis or as part of a monthly maintenance schedule. The service activities performance obligation is satisfied over time, as the work performed enhances the customer-controlled asset and another entity would not have to substantially re-perform the work we completed if they were to fulfill the remaining performance obligation. The transaction price may be a fixed monthly service fee, a fixed quoted fee or entirely variable, calculated on a time and materials basis. For service provided based on a fixed monthly fee, the performance obligation is a series in which the unit of service is one month. The customer receives substantially the same benefit each month from the service, regardless of the type of service activity performed, which may vary. As the progress towards satisfaction of the performance obligation is measured based on the passage of time, revenue is recognized monthly based on the fixed fee provided for in the contract. For service provided based on a quoted fixed fee, progress towards satisfaction of the performance obligation is measured using an input method based on the actual amount of labor and material costs incurred. The amount of the transaction price recognized as revenue each reporting period is determined by multiplying the transaction price by the ratio of actual costs incurred to date to total estimated costs expected for the service. Significant judgment is involved in the estimation of the progress to completion. Any adjustments to the measure of the progress to completion will be accounted for on a prospective basis. Changes to the scope of service is recognized as an adjustment to the transaction price in the period in which the change occurs. Service provided based on time and materials are generally short-term in nature and labor rates and parts pricing is agreed upon prior to commencing the service. We have elected to use the right-to-invoice practical expedient using an estimated gross margin percentage applied to actual costs incurred. The estimated gross margin percentage is fixed based on historical time and materials-based service. We evaluate the estimated gross margin percentage at the end of each reporting period and adjust the transaction price as appropriate. We believe these fee- and cost-based inputs fairly depict our efforts to provide aftermarket services and the amount of revenue recognized is representative of the transfer of service and value that the customer will have received as of the reporting date. As of September 30, 2018 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 Contract operations services are generally billed monthly at the beginning of the month in which service is being provided. For aftermarket services, billings will typically occur when parts are delivered or when service is complete; however, milestone billings may be used in longer-term projects. We recognize a contract asset when we have the right to consideration in exchange for goods or services transferred to a customer when the right is conditioned on something other than the passage of time. We recognize a contract liability when we have an obligation to transfer goods or services to a customer for which we have already received consideration. Freight billings to transport compressor assets and milestone billings on aftermarket services often result in a contract liability. As of September 30, and January 1, 2018 , our receivables from contracts with customers, net of allowance for doubtful accounts were $136.8 million and $115.6 million , respectively. As of September 30, and January 1, 2018 , our contract liabilities were $13.3 million and $9.0 million , respectively, which are included in deferred revenue and other long-term liabilities in our condensed consolidated balance sheets. The increase in the contract liability balance during the nine months ended September 30, 2018 was due to the deferral of $21.8 million primarily related to freight billings and aftermarket services, partially offset by $17.4 million recognized as revenue during the period primarily related to freight billings and aftermarket services. 7. Contract Costs We capitalize incremental costs to obtain a contract with a customer if we expect to recover those costs. Capitalized costs include commissions paid to our sales force to obtain contract operations contracts. We have applied the practical expedient to expense commissions paid for sales of service contracts and OTC parts and components within our aftermarket services segment as the amortization period is less than one year. As of September 30 , and January 1, 2018 , we recorded contract costs of $3.9 million and $2.3 million , respectively, associated with sales commissions. We capitalize costs incurred to fulfill a contract if those costs relate directly to a contract, enhance resources that we will use in satisfying performance obligations and if we expect to recover those costs. Capitalized costs incurred to fulfill our customer contracts include freight charges to transport compressor assets before transferring services to the customer and mobilization activities associated with our contract operations services. As of September 30 , and January 1, 2018 , we recorded contract costs of $32.6 million and $19.2 million , respectively, associated with freight and mobilization. Contract operations costs are amortized based on the transfer of service to which the assets relate, which is estimated to be 36 months based on average contract term, including anticipated renewals. We assess periodically whether the 36 -month estimate fairly represents the average contract term and adjust as appropriate. Aftermarket services fulfillment costs are recognized based on the percentage-of-completion method applicable to the customer contract. Contract costs associated with commissions are amortized to SG&A. Contract costs associated with freight and mobilization are amortized to cost of sales (excluding depreciation and amortization). During the three and nine months ended September 30, 2018 , we amortized $0.4 million and $1.1 million , respectively, related to commissions and $3.6 million and $9.2 million , respectively, related to freight and mobilization. During the three and nine months ended September 30, 2018 , there was no impairment loss recorded in relation to the costs capitalized.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Long-Term Debt	8. Long-Term Debt Long-term debt consisted of the following (in thousands): September 30, 2018 December 31, 2017 Credit Facility $ — $ 56,000 Partnership Credit Facility 826,500 674,306 Partnership’s 6% senior notes due April 2021 350,000 350,000 Less: Debt discount, net of amortization (1,977 ) (2,523 ) Less: Deferred financing costs, net of amortization (2,568 ) (3,338 ) 345,455 344,139 Partnership’s 6% senior notes due October 2022 350,000 350,000 Less: Debt discount, net of amortization (2,938 ) (3,441 ) Less: Deferred financing costs, net of amortization (3,338 ) (3,951 ) 343,724 342,608 Long-term debt $ 1,515,679 $ 1,417,053 Credit Facility On April 26, 2018, in connection with the Merger and Amendment No. 1, the Archrock Credit Facility was terminated. Upon termination, we repaid $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 as of the Merger were converted to letters of credit under the Partnership Credit Facility. As a result of the termination, we recorded a debt extinguishment loss of $2.5 million . At December 31, 2017 , the weighted average annual interest rate, excluding the effect of interest rate swaps, on the outstanding balance under the Archrock Credit Facility was 3.3% . During the three and nine months ended September 30, 2017 , we incurred $0.2 million and $0.5 million , respectively, in commitment fees on the daily unused amount of the Archrock Credit Facility. We incurred $0.2 million in commitment fees in 2018 prior to the facility’s termination and were in compliance with all covenants under the Archrock Credit Facility through its closing. Partnership Credit Facility The Partnership Credit Facility is a five -year, $1.25 billion asset-based revolving credit facility that will mature on March 30, 2022 except that if any portion of the Partnership’s 6% senior notes due April 2021 are outstanding as of December 2, 2020, then maturity will instead be on December 2, 2020 . In March 2017, the Partnership incurred $14.9 million in transaction costs related to the formation of the Partnership Credit Facility. Concurrent with entering into the Partnership Credit Facility, the Partnership expensed $0.6 million of unamortized deferred financing costs and recorded a debt extinguishment loss of $0.3 million related to the termination of its Former Credit Facility. On February 23, 2018, the Partnership amended the Partnership Credit Facility to, among other things: • increase the maximum Total Debt to EBITDA ratios, as defined in the Partnership Credit Facility agreement (see below for the revised ratios), effective as of the execution of Amendment No. 1 on February 23, 2018; and • effective upon completion of the Merger on April 26, 2018: – increase the aggregate revolving commitment from $1.1 billion to $1.25 billion ; – increase the amount available for the issuance of letters of credit from $25.0 million to $50.0 million ; – increase the basket sizes under certain covenants including covenants limiting our ability to make investments, incur debt, make restricted payments, incur liens and make asset dispositions; – name Archrock Services, L.P., one of our subsidiaries, as a borrower under the Partnership Credit Facility and certain of our other subsidiaries as loan guarantors; and – amend the definition of “Borrowing Base” to include certain assets of ours and our subsidiaries. The Partnership incurred $3.3 million in transaction costs related to Amendment No. 1 which were included in other long-term assets in our condensed consolidated balance sheet and are being amortized over the term of the Partnership Credit Facility. As of September 30, 2018 , the Partnership had $15.4 million outstanding letters of credit under the Partnership Credit Facility and the applicable margin on amounts outstanding under the Credit Facility was 3.2% . The weighted average annual interest rate on the outstanding balance under the Partnership Credit Facility, excluding the effect of interest rate swaps, was 5.5% and 4.8% at September 30, 2018 and December 31, 2017 , respectively. The Partnership incurred $0.6 million in commitment fees on the daily unused amount of the Partnership Credit Facility and the Former Credit Facility during each of the three months ended September 30, 2018 and 2017 , and $1.7 million and $1.5 million during the nine months ended September 30, 2018 and 2017 , respectively. The Partnership must maintain the following consolidated financial ratios, as defined in the Partnership 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 2018 5.95 to 1.0 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 September 30, 2018 , the Partnership had undrawn capacity of $408.1 million under the Partnership Credit Facility. As a result of the ratio requirements above, $324.0 million of the $408.1 million of undrawn capacity was available for additional borrowings as of September 30, 2018 . As of September 30, 2018 , the Partnership was in compliance with all covenants under the Partnership Credit Facility agreement.

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2018
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 Partnership 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 September 30, 2018 , the Partnership was a party to the following interest rate swaps, which were entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates (in millions): Expiration Date Notional Value May 2019 $ 100.0 May 2020 100.0 March 2022 300.0 $ 500.0 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. The Partnership has no specific collateral posted for its derivative instruments. We have designated these interest rate swaps as cash flow hedging instruments and so any change in their fair value is 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. Prior to adoption of ASU 2017-12, we performed quarterly calculations to determine whether the swap agreements continued to be highly effective at achieving offsetting changes in cash flows attributable to the hedged risk. Upon adoption of ASU 2017-12, 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 $3.6 million of the deferred pre-tax gain attributable to interest rate swaps included in accumulated other comprehensive income (loss) at September 30, 2018 will be reclassified into earnings as interest income at then-current values during the next twelve months as the underlying hedged transactions occur. In August 2017, the Partnership amended the terms of $300.0 million of its interest rate swap agreements to adjust the fixed interest rate and extend the maturity dates to March 2022. These amendments effectively created new derivative contracts and terminated the old derivative contracts. As a result, as of the amendment date, we discontinued the original cash flow hedge relationships on a prospective basis and designated the amended interest rate swaps under new cash flow hedge relationships based on the amended terms. The fair value of the interest rate swaps immediately prior to the execution of the amendments was a liability of $0.7 million . The associated amount in accumulated other comprehensive income (loss) was amortized into interest expense over the original terms of the interest rate swaps through May 2018. As of September 30, 2018 , the weighted average effective fixed interest rate on the interest rate swaps was 1.8% . The following tables present the effect of the derivative instruments designated as cash flow hedging instruments on our condensed consolidated balance sheets (in thousands): Fair Value Asset (Liability) September 30, 2018 December 31, 2017 Other current assets $ 3,592 $ 186 Other long-term assets 9,487 4,490 Accrued liabilities — (134 ) $ 13,079 $ 4,542 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 September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Pre-tax gain recognized in other comprehensive income (loss) $ 1,642 $ 1,919 $ 8,583 $ 2,282 Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense 429 (678 ) (83 ) (2,521 ) Three Months Ended Nine Months Ended Total amount of interest expense in which the effects of cash flow hedges are recorded $ 23,518 $ 69,402 Amount of gain reclassified from accumulated other comprehensive income (loss) into interest expense 429 582 See Note 18 (“Accumulated Other Comprehensive Income”) for further details on the derivative instruments.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	10. Fair Value Measurements The accounting standard for fair value measurements and disclosures establishes a fair value hierarchy that prioritizes the inputs of valuation techniques used to measure fair value into the following three categories: • Level 1 — Quoted unadjusted prices for identical instruments in active markets to which we have access at the date of measurement. • Level 2 — Quoted prices for similar instruments in active markets, quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 2 inputs are those in markets for which there are few transactions, the prices are not current, little public information exists or prices vary substantially over time or among brokered market makers. • Level 3 — Model-derived valuations in which one or more significant inputs or significant value drivers are unobservable. Unobservable inputs are those inputs that reflect our own assumptions regarding how market participants would price the asset or liability based on the best available information. 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): September 30, 2018 December 31, 2017 Interest rate swaps asset $ 13,079 $ 4,676 Interest rate swaps liability — (134 ) Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis During the nine months ended September 30, 2018 , 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 $1.5 million and $2.6 million at September 30, 2018 and December 31, 2017 , 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 Partnership 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): September 30, 2018 December 31, 2017 Carrying amount of fixed rate debt (1) $ 689,179 $ 686,747 Fair value of fixed rate debt 706,000 702,000 —————— (1) Carrying amounts are shown net of unamortized debt discounts and unamortized deferred financing costs. See Note 8 (“Long-Term Debt”) for further details.

Long-Lived Asset Impairment

Long-Lived Asset Impairment	9 Months Ended
	Sep. 30, 2018
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 September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Idle compressor units retired from the active fleet 60 50 225 190 Horsepower of idle compressor units retired from the active fleet 23,000 20,000 73,000 71,000 Impairment recorded on idle compressor units retired from the active fleet $ 6,660 $ 5,934 $ 18,323 $ 19,686 In addition to the impairment discussed above, during the three and nine months ended September 30, 2017 , $0.8 million of leasehold improvements and furniture and fixtures were impaired in conjunction with the relocation of our corporate office during the third quarter of 2017. See Note 13 (“Corporate Office Relocation”) for further details.

Restructuring and Other Charges

Restructuring and Other Charges	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring and Other Charges	12. Restructuring and Other Charges As discussed in Note 4 (“Discontinued Operations”) , we completed the Spin-off in 2015. During the three and nine months ended September 30, 2017 , we incurred $0.4 million and $1.2 million , respectively, of costs for retention benefits associated with the Spin-off that were directly attributable to Archrock. The restructuring charges associated with the Spin-off are not directly attributable to our reportable segments because they primarily represent costs incurred within the corporate function. No such costs were incurred subsequent to December 31, 2017.

Corporate Office Relocation

Corporate Office Relocation	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Corporate Office Relocation	13. Corporate Office Relocation During the three and nine months ended September 30, 2017 , we recorded $2.1 million in charges associated with the relocation of our corporate headquarters during the third quarter 2017. These charges were reflected in SG&A and included accelerated expense associated with the contractual lease payments of our former corporate office, which were made through the end of the lease term in the first quarter of 2018, and relocation costs to move our corporate office. Additionally, leasehold improvements and furniture and fixtures were impaired in the third quarter of 2017 and are reflected in long-lived asset impairment in our condensed consolidated income statements (see Note 11 (“ Long-Lived Asset Impairment ”)). We did not incur additional costs as a result of the relocation subsequent to September 30, 2017. The following table summarizes the changes to our accrued liability balance related to our corporate office relocation for the nine months ended September 30, 2018 and 2017 (in thousands): Nine Months Ended September 30, 2018 2017 Beginning balance $ 583 $ — Additions for costs expensed — 2,113 Less non-cash expense (1) — (613 ) Reductions for payments (583 ) (72 ) Ending balance $ — $ 1,428 —————— (1) Represents non-cash write-off of leasehold improvements, furniture and fixtures and the net liability associated with the straight-line expense associated with the lease of our former corporate office. The following table summarizes our corporate office relocation costs by category during the three and nine months ended September 30, 2017 (in thousands): Remaining lease costs $ 1,258 Impairment of leasehold improvements and furniture and fixtures 795 Relocation costs 60 Total corporate relocation costs $ 2,113

Income Taxes (Notes)

Income Taxes (Notes)	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	14. Income Taxes Unrecognized Tax Benefits As of September 30, 2018 , we believe $0.9 million of our unrecognized tax benefits will be reduced prior to September 30, 2019 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. Impact of the TCJA At December 31, 2017, a provisional amount for the effects of the TCJA was recorded and resulted in a $53.4 million tax benefit to our provision for income taxes in our consolidated statement of operations. This amount consisted of a $57.7 million tax benefit due to reducing our continuing operations net deferred tax liability, a $4.6 million tax detriment due to reducing our discontinued operations deferred tax asset and a $0.3 million tax benefit due to reducing our other comprehensive income net deferred tax liability. As of September 30, 2018 , our analysis of the impact of the TCJA was complete and there were no material changes to the provisional amount recorded at December 31, 2017.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	15. Stock-Based Compensation Stock Incentive Plan In April 2013, we adopted the 2013 Plan to provide for the granting of stock options, restricted stock, restricted stock units, stock appreciation rights, performance units, other stock-based awards and dividend equivalent rights to employees, directors and consultants of Archrock. The 2013 Plan is administered by the compensation committee of our board of directors. Under the 2013 Plan, the maximum number of shares of common stock available for issuance pursuant to awards is 10,100,000 . Each option and stock appreciation right granted counts as one share against the aggregate share limit, and any share subject to a stock settled award other than a stock option, stock appreciation right or other award for which the recipient pays intrinsic value counts as 1.75 shares against the aggregate share limit. Shares subject to awards granted under the 2013 Plan that are subsequently canceled, terminated, settled in cash or forfeited (excluding shares withheld to satisfy tax withholding obligations or to pay the exercise price of an option) are, to the extent of such cancellation, termination, settlement or forfeiture, available for future grant under the 2013 Plan. Cash-settled awards are not counted against the aggregate share limit. No additional grants have been or may be made under the 2007 Plan following the adoption of the 2013 Plan. Previous grants made under the 2007 Plan will continue to be governed by that plan and the applicable award agreements. The compensation committee of our board of directors generally establishes its schedule for making annual long-term incentive awards, consisting of a combination of restricted shares and performance units vesting over multiple years, to our named executive officers several months in advance and does not make such awards based on knowledge of material nonpublic information. Although the compensation committee of our board of directors has historically granted awards on a regular, predictable cycle — after earnings information has been disseminated to the marketplace — such awards may be granted at other times during the year, as determined in the sole discretion of the compensation committee. Stock Options Stock options are granted at fair market value at the grant date, are exercisable according to the vesting schedule established by the compensation committee of our board of directors in its sole discretion and expire no later than seven years after the grant date. Stock options generally vest one-third per year on each of the first three anniversaries of the grant date, subject to continued service through the applicable vesting date. The following table presents stock option activity during the nine months ended September 30, 2018 : Stock Options (in thousands) Weighted Average Exercise Price Per Share Weighted Average Remaining Life (in years) Aggregate Intrinsic Value (in thousands) Options outstanding, January 1, 2018 489 $ 12.28 Exercised (30 ) 8.79 Canceled (53 ) 13.96 Options outstanding and exercisable, September 30, 2018 406 12.31 0.8 $ 1,305 Intrinsic value is the difference between the market value of our stock and the exercise price of each stock option multiplied by the number of stock options outstanding for those stock options where the market value exceeds their exercise price. The total intrinsic value of stock options exercised during nine months ended September 30, 2018 was $0.1 million . Restricted Stock, Stock-Settled Restricted Stock Units, Performance Units, Cash-Settled Restricted Stock Units and Cash Settled Performance Units For grants of restricted stock, restricted stock units and performance units, we recognize compensation expense over the vesting period equal to the fair value of our common stock at the grant date. Our restricted stock, restricted stock units, and performance units include rights to receive dividends or dividend equivalents. We remeasure the fair value of cash-settled restricted stock units and cash-settled performance units and record a cumulative adjustment of the expense previously recognized. Our obligation related to the cash-settled restricted stock units and cash settled performance units is reflected as a liability in our condensed consolidated balance sheets. Restricted stock, stock-settled restricted stock units, cash-settled restricted stock units and cash-settled performance units generally vest one-third per year on dates as specified in the applicable award agreement, subject to continued service through the applicable vesting date. Stock-settled performance units cliff vest at the end of the performance period as specified in the terms of the applicable award agreement, subject to continued service through the applicable vesting date. The following table presents restricted stock, restricted stock unit, performance unit, cash-settled restricted stock unit and cash- settled performance unit activity during the nine months ended September 30, 2018 : Shares (in thousands) Weighted Average Grant Date Fair Value Per Share Non-vested awards, January 1, 2018 1,440 $ 10.39 Granted 1,148 9.66 Converted (1) 140 7.03 Vested (747 ) 10.46 Canceled (219 ) 9.79 Non-vested awards, September 30, 2018 (2) 1,762 9.69 —————— (1) Reflects conversion of Partnership phantom units into Archrock restricted stock units pursuant to the Merger See “Partnership Long-Term Incentive Plan” section below for detail regarding the conversion of awards. (2) Non-vested awards as of September 30, 2018 are comprised of 216,000 cash-settled restricted stock units and cash-settled performance units and 1,546,000 restricted shares and stock-settled performance units. As of September 30, 2018 , we expect $13.2 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 2.3 years. Partnership Long-Term Incentive Plan In April 2017, the Partnership adopted the 2017 Partnership LTIP to provide for the benefit of employees, directors and consultants of the Partnership, us and our respective affiliates. The 2017 Partnership LTIP provided for the issuance of unit options, unit appreciation rights, restricted units, phantom units, performance awards, bonus awards, distribution equivalent rights, cash awards and other unit based awards. Previous grants made under the 2006 Partnership LTIP continued to be governed by the 2006 Partnership LTIP and the applicable award agreements. We recognized compensation expense over the vesting period equal to the fair value of the Partnership’s common units at the grant date. Phantom units granted under the 2017 and 2006 LTIP may include nonforfeitable tandem distribution equivalent rights to receive cash distributions on unvested phantom units in the quarter in which distributions are paid on common units. Phantom units generally vested one-third per year on dates as specified in the applicable award agreements subject to continued service through the applicable vesting date. During the nine months ended September 30, 2018, 53,091 phantom units vested with a weighted average grant date fair value per unit of $11.24 . Pursuant to the Merger, all outstanding phantom units previously granted under the 2017 and 2006 Partnership LTIP were converted into comparable awards based on Archrock’s common shares. As such, all outstanding phantom units were converted, effective as of the closing of the Merger, into Archrock restricted stock units. See Note 17 (“Equity”) for further details regarding the Merger. Each Archrock restricted stock unit will be subject to the same vesting, forfeiture and other terms and conditions applicable to the converted Partnership phantom units. Under Accounting Standards Codification Topic 718, Compensation - Stock Compensation, we determined that there was no additional compensation cost to record as the conversion of awards did not result in incremental fair value.

Earnings per Share (Notes)

Earnings per Share (Notes)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings per Share	16. Earnings per Share Basic 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 income (loss) attributable to Archrock common stockholders per common share is determined by dividing 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 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 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 loss per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Income (loss) from continuing operations attributable to Archrock stockholders $ 9,974 $ (10,181 ) $ 8,095 $ (28,553 ) Loss from discontinued operations, net of tax — (54 ) — (54 ) Net income (loss) attributable to Archrock stockholders 9,974 (10,235 ) 8,095 (28,607 ) Less: Net income attributable to participating securities (241 ) (179 ) (554 ) (513 ) Net income (loss) attributable to Archrock common stockholders $ 9,733 $ (10,414 ) $ 7,541 $ (29,120 ) The following table shows the potential shares of common stock that were included in computing diluted income (loss) attributable to Archrock common stockholders per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Weighted average common shares outstanding including participating securities 129,486 70,952 104,489 70,847 Less: Weighted average participating securities outstanding (1,644 ) (1,308 ) (1,576 ) (1,327 ) Weighted average common shares outstanding — used in basic income (loss) per common share 127,842 69,644 102,913 69,520 Net dilutive potential common shares issuable: On exercise of options 111 * 96 * On the settlement of employee stock purchase plan shares 2 * 4 * Weighted average common shares outstanding — used in diluted income (loss) per common share 127,955 69,644 103,013 69,520 —————— * Excluded from diluted 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 income (loss) attributable to Archrock common stockholders per common share as their inclusion would have been anti-dilutive (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Net dilutive potential common shares issuable: On exercise of options where exercise price is greater than average market value for the period 187 240 199 278 On exercise of options — 100 — 116 Net dilutive potential common shares issuable 187 340 199 394

Equity

Equity	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Equity	17. Equity Merger Transaction On January 1, 2018, we entered into the Merger Agreement pursuant to which we agreed to merge the Partnership with and into our indirect wholly-owned subsidiary. On April 26, 2018, the Merger was completed and we issued 57.6 million shares of our common stock to acquire the 41.2 million common units of the Partnership not owned by us prior to the Merger at a fixed exchange ratio of 1.40 shares of our common stock for each Partnership common unit for total implied consideration of $625.3 million . Additionally, the incentive distribution rights in the Partnership, all of which we owned indirectly prior to the Merger, were canceled and ceased to exist. As a result of the Merger, the Partnership’s common units are no longer publicly traded. The Partnership’s 6% senior notes due April 2021 and October 2022 were not impacted by the Merger and remain outstanding. 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 which was reflected as a reduction of the noncontrolling interest with corresponding increases to common stock, additional paid-in capital and accumulated other comprehensive income. No gain or loss was recognized in our condensed consolidated statements of operations as a result of the Merger. The following table presents the effects of changes in our ownership interest in the Partnership on the equity attributable to Archrock stockholders: Nine Months Ended September 30, 2018 2017 Net income (loss) attributable to Archrock stockholders $ 8,095 $ (28,607 ) Increase in Archrock stockholders’ additional paid-in capital for purchase of Partnership common units 54,751 17,638 Change from net income (loss) attributable to Archrock stockholders and transfers from noncontrolling interest $ 62,846 $ (10,969 ) Prior to the Merger, public unitholders held an approximate 57% ownership interest in the Partnership and we owned the remaining equity interest. The equity interests in the Partnership that were owned by the public prior to April 26, 2018 are reflected within noncontrolling interest in our condensed consolidated balance sheet as of December 31, 2017. The earnings of the Partnership that were attributed to its common units held by the public prior to April 26, 2018 are reflected in net income (loss) attributable to the noncontrolling interest in our condensed consolidated statement of operations. The tax effects of the Merger were reported as adjustments to other long-term assets, long-term assets associated with discontinued operations, deferred income taxes, additional paid-in capital and other comprehensive income. Due to the change in ownership and tax step up from the consideration given in the Merger, we recorded a $156.5 million deferred tax asset which resulted in an overall $55.0 million net deferred tax asset. We evaluated the realizability of our resulting net deferred tax asset position by assessing the available positive and negative evidence and concluded, based on the weight of the evidence, that a $53.4 million valuation allowance was required. The $103.1 million net tax impact of the change in deferred tax asset and the valuation allowance was recorded as an offsetting increase to additional paid-in capital. We incurred $0.2 million and $10.0 million of transaction costs directly attributable to the Merger during the three and nine months ended September 30, 2018 , respectively, including financial advisory, legal service and other professional fees, which were recorded to merger-related costs on our condensed consolidated statements of operations. Partnership Capital Offering In August 2017, the Partnership sold, pursuant to a public underwritten offering, 4,600,000 common units, including 600,000 common units pursuant to an over-allotment option. The Partnership received net proceeds of $60.3 million after deducting underwriting discounts, commissions and offering expenses, which it used to repay borrowings outstanding under the Partnership Credit Facility. In connection with this sale and as permitted under its partnership agreement, the Partnership sold 93,163 general partner units to its General Partner for a contribution of $1.3 million to maintain the General Partner’s approximate 2% general partner interest in the Partnership. Cash Dividends The following table summarizes our dividends per common share: Declaration Date Payment Date Dividends per Common Share Total Dividends (in thousands) January 19, 2017 February 15, 2017 $ 0.120 $ 8,458 April 26, 2017 May 16, 2017 0.120 8,534 July 26, 2017 August 15, 2017 0.120 8,536 October 20, 2017 November 15, 2017 0.120 8,536 January 18, 2018 February 14, 2018 0.120 8,532 April 25, 2018 May 15, 2018 0.120 15,486 July 25, 2018 August 14, 2018 0.132 17,114 On October 24, 2018 , our board of directors declared a quarterly dividend of $0.132 per share of common stock to be paid on November 14, 2018 to stockholders of record at the close of business on November 7, 2018 .

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Notes)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Accumulated Other Comprehensive Income	18. Accumulated Other Comprehensive Income Components of comprehensive income (loss) are net income (loss) and all changes in equity during a period except those resulting from transactions with owners. Our accumulated other comprehensive income (loss) consists of changes in the fair value of derivative instruments, net of tax, that 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 nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Beginning accumulated other comprehensive income (loss) $ 9,374 $ (936 ) $ 1,197 $ (1,678 ) Gain recognized in other comprehensive income, net of tax provision of $345, $247, $1,234 and $290, respectively 1,298 931 3,349 1,104 (Gain) loss reclassified from accumulated other comprehensive loss to interest expense, net of tax provision (benefit) of $90, $(108), $37 and $(414), respectively (1) (339 ) 200 117 769 Merger-related adjustments (2) — — 5,670 — Other comprehensive income attributable to Archrock stockholders 959 1,131 9,136 1,873 Ending accumulated other comprehensive income $ 10,333 $ 195 $ 10,333 $ 195 —————— (1) Included stranded tax effects resulting from the TCJA of $0.3 million reclassified to accumulated deficit during the nine months ended September 30, 2018 . See Note 2 (“Recent Accounting Developments”) for further details. (2) 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 the derivative instruments.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	19. 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 2018 through the first quarter of 2020 and maximum potential future payments of $2.3 million . As of September 30, 2018 , 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 September 30, 2018 and December 31, 2017 , we accrued $3.2 million and $1.7 million , respectively, for the outcomes of non-income based tax audits. We do not expect that the ultimate resolutions of these audits will result in a material variance from the amounts accrued. We do not accrue for unasserted claims for tax audits unless we believe the assertion of a claim is probable, it is probable that it will be determined that the claim is owed and we can reasonably estimate the claim or range of the claim. We believe the likelihood is remote that the impact of potential unasserted claims from non-income based tax audits could be material to our consolidated financial position, but it is possible that the resolution of future audits could be material to our consolidated results of operations or cash flows. Subject to the provisions of the tax matters agreement between Exterran Corporation and us, both parties agreed to indemnify the primary obligor of any return for tax periods beginning before and ending before or after the Spin-off (including any ongoing or future amendments and audits for these returns) for the portion of the tax liability (including interest and penalties) that relates to their respective operations reported in the filing. The tax contingencies mentioned above relate to tax matters for which we are responsible in managing the audit. As of both September 30, 2018 and December 31, 2017 , we recorded an indemnification liability (including penalties and interest), in addition to the tax contingency above, of $1.6 million for our share of non-income based tax contingencies related to audits being managed by Exterran Corporation. 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. In addition, we have a minimal amount of insurance on our offshore assets. 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. Indemnification Obligations In connection with the Spin-off, we entered into a separation and distribution agreement which provides for cross-indemnities between Exterran Corporation’s operating subsidiary and us and established procedures for handling claims subject to indemnification and related matters. Generally, the separation and distribution agreement provides for cross-indemnities principally designed to place financial responsibility for the obligations and liabilities of our business with us and financial responsibility for the obligations and liabilities of Exterran Corporation’s business with Exterran Corporation. Pursuant to the separation and distribution agreement, we and Exterran Corporation will generally release the other party from all claims arising prior to the Spin-off that relate to the other party’s business. 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. Heavy Equipment In 2011, the Texas Legislature enacted changes that affected the appraisal of natural gas compressors for ad valorem tax purposes by expanding the special valuation methodology for “Heavy Equipment Inventory” to include inventory held for lease effective from the beginning of 2012. Under the Heavy Equipment Statutes, we are a “Heavy Equipment Dealer” and our natural gas compressors are Heavy Equipment Inventory. As such, we began filing our ad valorem taxes under this methodology starting in the 2012 tax year. Our natural gas compressors are taxable under the Heavy Equipment Statutes in the counties where we maintain a business location and store our inventory of natural gas compressors as opposed to where the compressors may be located on January 1 of a tax year. Although a few appraisal review boards accepted our position, many denied it. As a result, our wholly-owned subsidiary, Archrock Services Leasing LLC, formerly known as EES Leasing, and the Partnership’s wholly-owned subsidiary, Archrock Partners Leasing LLC, formerly known as EXLP Leasing, filed numerous petitions for review in the appropriate district courts with respect to the 2012-2017 tax years. To date, three cases have been decided by trial courts, with two of the decisions having been rendered by the same presiding judge. All three of those decisions were appealed, and all three of the appeals have been decided on by intermediate appellate courts. On March 2, 2018, the Texas Supreme Court ruled in one of the cases, EXLP Leasing LLC & EES Leasing LLC v. Galveston Central Appraisal District , on two of the three issues related to the Heavy Equipment Statutes: constitutionality and situs. The third issue — the district court’s ruling that the Heavy Equipment Statutes apply to the compressors — was not appealed in this case. The Texas Supreme Court ruled in our favor on all accounts, holding that the Heavy Equipment Statutes are constitutional and that our natural gas compressors are taxable only in the counties where we maintain a business location that manages our inventory of natural gas compressors. On September 28, 2018, the Texas Supreme Court denied Galveston Central Appraisal District’s motion for rehearing, thus concluding the litigation in this case. Two cases, EXLP Leasing LLC & EES Leasing LLC v. Loving County Appraisal District and EES Leasing LLC & EXLP Leasing LLC v. Ward County Appraisal District , remain pending for review by the Texas Supreme Court. We expect the pending cases to be disposed of in a manner consistent with the Galveston case. As a result of the rulings on the Heavy Equipment litigation thus far, all counties in which we filed petitions for review have removed our compressors from their 2018 property rolls except for Galveston County, which has agreed to do so promptly. As of September 30, 2018, many of the petitions that we filed for tax years 2012-2017 have been closed and the remaining pending petitions are in the process of being closed. We believe that the likelihood of an unfavorable outcome or further litigation on this issue is remote. Other The SEC has been conducting an investigation in connection with certain previously disclosed errors and possible irregularities at one of our former international operations. We and Exterran Corporation are cooperating with the SEC in the investigation of this matter. The SEC’s investigation related to the circumstances giving rise to the restatement of prior period consolidated and combined financial statements is continuing, and we are presently unable to predict the duration, scope or results or whether the SEC will commence any legal action.

Segments

Segments	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segments	20. Segments We manage our business segments primarily based upon 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 nine months ended September 30, 2018 and 2017 (in thousands): Contract Operations Aftermarket Services Total Three months ended September 30, 2018 Revenue $ 169,509 $ 62,863 $ 232,372 Gross margin 100,453 12,820 113,273 Three months ended September 30, 2017 Revenue $ 153,524 $ 44,329 $ 197,853 Gross margin 81,573 5,843 87,416 Nine months ended September 30, 2018 Revenue $ 496,156 $ 175,126 $ 671,282 Gross margin 294,696 31,953 326,649 Nine months ended September 30, 2017 Revenue $ 454,622 $ 131,098 $ 585,720 Gross margin 256,331 19,271 275,602 The following table reconciles total gross margin to income (loss) before income taxes (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Total gross margin $ 113,273 $ 87,416 $ 326,649 $ 275,602 Less: Selling, general and administrative 26,298 29,108 80,455 81,823 Depreciation and amortization 43,779 47,463 131,565 142,483 Long-lived asset impairment 6,660 7,105 18,323 20,858 Restatement and other charges 396 566 (195 ) 3,287 Restructuring and other charges — 422 — 1,245 Interest expense 23,518 22,892 69,402 66,817 Debt extinguishment loss — — 2,450 291 Merger-related costs 182 — 9,993 — Other income, net (660 ) (2,716 ) (3,449 ) (4,472 ) Income (loss) before income taxes $ 13,100 $ (17,424 ) $ 18,105 $ (36,730 )

Recent Accounting Developments

Recent Accounting Developments (Policies)	9 Months Ended
	Sep. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Account Policies	Accounting Standards Updates Implemented ASU 2018-05 was issued in March 2018 to clarify the income taxes disclosure requirements as they pertain to SAB 118, including the requirement to disclose a reasonable estimate, if determinable, of the tax effects of the TCJA in the reporting period in which the TCJA was enacted, as well as additional disclosures required in the following interim reporting periods if the measurement period approach is used. In accordance with ASU 2018-05, we disclosed a reasonable estimate of the income tax effects of the TCJA on our consolidated financial statements in our 2017 Form 10-K. We completed our analysis of the tax effects of the TCJA in the third quarter of 2018 with no material change to the amounts disclosed at December 31, 2017. See Note 14 (“Income Taxes”) for further details. On January 1, 2018, we adopted ASU 2018-02 which allows for a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the TCJA. As a result of the TCJA’s corporate rate reduction, we had $0.3 million of stranded tax effects in accumulated other comprehensive income related to our derivative instruments and terminated interest rate swaps, which we elected to reclassify to accumulated deficit. On January 1, 2018, we adopted ASU 2017-12 using the modified retrospective approach to existing cash flow hedge relationships as of January 1, 2018. ASU 2017-12 expands and refines hedge accounting for both financial and nonfinancial risk components, aligns the recognition and presentation of the effects of the hedging instrument and hedged item in the financial statements and eliminates the requirement to separately measure and report hedge ineffectiveness. As a result of the adoption of ASU 2017-12, we recognized a net gain of $0.4 million as a cumulative-effect adjustment to opening retained earnings and a corresponding adjustment to other comprehensive income (loss) to reverse the cumulative ineffectiveness previously recognized in interest expense. On January 1, 2018, we adopted ASU 2016-15 on a retrospective basis. ASU 2016-15 addresses diversity in practice and simplifies several elements of cash flow classification including how certain cash receipts and cash payments are classified in the statement of cash flows. ASU 2016-15 did not have an impact on our condensed consolidated statement of cash flow for the nine months ended September 30, 2017 . Accounting Standards Updates Not Yet Implemented In August 2018, the FASB issued ASU 2018-15 which aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). For public entities, ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of ASU 2018-15 on our consolidated financial statements and footnote disclosures and anticipate adopting this guidance on a prospective basis in the fourth quarter of 2018. 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 that 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 the 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.
Revenue Recognition Update	Revenue Recognition Update On January 1, 2018, we adopted the Revenue Recognition Update using the modified retrospective method applied to those contracts which were not completed as of January 1, 2018. We recognized the cumulative effect of initially applying the Revenue Recognition Update as an adjustment to the opening balance of retained earnings. For contracts that were modified before the effective date, we identified performance obligations on the basis of the current version of the contract, which included any contract modifications since inception. The application of the practical expedient for contract modifications did not have a material effect on the adjustment to retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Under previous guidance, contract operations revenue was recognized when earned, which generally occurs monthly when the service is provided under our customer contracts. Under the Revenue Recognition Update the timing of revenue recognition is impacted by contractual provisions for service availability guarantees of our compressor assets and re-billable costs associated with moving our compressor assets to a customer site. These changes are further discussed below and did not result in a material difference from previous practice for contract operations. The Revenue Recognition Update resulted in a significant change related to our aftermarket services operations, maintenance, overhaul and reconfiguration services. Under previous guidance, revenue was recognized on a completed contract basis as products were delivered and title was transferred or services were performed for the customer. Under the Revenue Recognition Update, these services are recognized as revenue over time, using output or input methods to measure the progress toward complete satisfaction of the performance obligation based on the nature of the goods or services being provided. The adoption did not result in a material difference in the amount or timing of revenues for aftermarket services parts and components sales. The Revenue Recognition Update provides guidance on contract costs that should be recognized as assets and amortized over the period that the related goods or services transfer to the customer. Certain costs that were previously expensed as incurred, such as sales commissions and freight charges to transport compressor assets, are deferred and amortized. The following table summarizes the cumulative impact of the adoption of the Revenue Recognition Update on the opening balance sheet (in thousands): December 31, 2017 Adjustments Due to the Revenue Recognition Update January 1, 2018 Assets Accounts receivable, trade $ 113,416 $ 7,883 $ 121,299 Inventory 90,691 (6,917 ) 83,774 Contract costs — 21,524 21,524 Liabilities Accrued liabilities $ 71,116 $ 209 $ 71,325 Deferred revenue 4,858 3,188 8,046 Deferred income taxes 97,943 4,427 102,370 Equity Accumulated deficit $ (2,241,243 ) $ 14,666 $ (2,226,577 ) The following tables summarize the impact of the application of the Revenue Recognition Update on our condensed consolidated balance sheet and condensed consolidated statements of operations (in thousands): September 30, 2018 Balance Sheet As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Assets Accounts receivable, trade $ 141,781 $ 123,079 $ 18,702 Inventory 77,497 94,528 (17,031 ) Contract costs 36,482 — 36,482 Liabilities Accounts payable, trade $ 70,950 $ 70,875 $ 75 Accrued liabilities 74,879 74,619 260 Deferred revenue 12,909 8,865 4,044 Deferred income taxes 2,845 2,570 275 Other long-term liabilities 19,612 19,595 17 Equity Additional paid-in capital (1) $ 3,154,058 $ 3,144,217 $ 9,841 Accumulated deficit (2,259,489 ) (2,283,130 ) 23,641 —————— (1) Represents the impact of the Revenue Recognition Update on net income attributable to noncontrolling interest which was reclassed to additional paid-in capital pursuant to the Merger. Three Months Ended September 30, 2018 Statement of Operations As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Revenue: Contract operations $ 169,509 $ 170,981 $ (1,472 ) Aftermarket services 62,863 59,623 3,240 Total revenue 232,372 230,604 1,768 Cost of sales (excluding depreciation and amortization): Contract operations 69,056 73,673 (4,617 ) Aftermarket services 50,043 47,973 2,070 Total cost of sales (excluding depreciation and amortization) 119,099 121,646 (2,547 ) Selling, general and administrative 26,298 26,924 (626 ) Provision for income taxes 3,126 2,617 509 Net income attributable to Archrock stockholders 9,974 5,542 4,432 Nine Months Ended September 30, 2018 Statement of Operations As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Revenue: Contract operations $ 496,156 $ 500,306 $ (4,150 ) Aftermarket services 175,126 161,065 14,061 Total revenue 671,282 661,371 9,911 Cost of sales (excluding depreciation and amortization): Contract operations 201,460 214,823 (13,363 ) Aftermarket services 143,173 132,984 10,189 Total cost of sales (excluding depreciation and amortization) 344,633 347,807 (3,174 ) Selling, general and administrative 80,455 82,051 (1,596 ) Provision for income taxes 1,913 (1,837 ) 3,750 Less: Net income attributable to the noncontrolling interest (8,097 ) (6,141 ) (1,956 ) Net income (loss) attributable to Archrock stockholders 8,095 (880 ) 8,975
Leases	Leases ASC Topic 842 Leases establishes a ROU model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be 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. ASC Topic 842 Leases is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach that involves recasting the comparative periods in the year of initial application is required for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain transition practical expedients available. In July 2018 the FASB provided an optional transition method that would allow adoption of the standard as of the effective date without restating prior periods. We intend to adopt ASC Topic 842 Leases on January 1, 2019 using the optional transition method and are currently assessing the transition practical expedients. Upon adoption, we will recognize the cumulative effect of adoption as an adjustment to the opening balance of our retained earnings. Comparative information will continue to be reported under the accounting standards in effect for those periods.

Recent Accounting Development_2

Recent Accounting Developments (Tables)	9 Months Ended
	Sep. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The following table summarizes the cumulative impact of the adoption of the Revenue Recognition Update on the opening balance sheet (in thousands): December 31, 2017 Adjustments Due to the Revenue Recognition Update January 1, 2018 Assets Accounts receivable, trade $ 113,416 $ 7,883 $ 121,299 Inventory 90,691 (6,917 ) 83,774 Contract costs — 21,524 21,524 Liabilities Accrued liabilities $ 71,116 $ 209 $ 71,325 Deferred revenue 4,858 3,188 8,046 Deferred income taxes 97,943 4,427 102,370 Equity Accumulated deficit $ (2,241,243 ) $ 14,666 $ (2,226,577 ) The following tables summarize the impact of the application of the Revenue Recognition Update on our condensed consolidated balance sheet and condensed consolidated statements of operations (in thousands): September 30, 2018 Balance Sheet As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Assets Accounts receivable, trade $ 141,781 $ 123,079 $ 18,702 Inventory 77,497 94,528 (17,031 ) Contract costs 36,482 — 36,482 Liabilities Accounts payable, trade $ 70,950 $ 70,875 $ 75 Accrued liabilities 74,879 74,619 260 Deferred revenue 12,909 8,865 4,044 Deferred income taxes 2,845 2,570 275 Other long-term liabilities 19,612 19,595 17 Equity Additional paid-in capital (1) $ 3,154,058 $ 3,144,217 $ 9,841 Accumulated deficit (2,259,489 ) (2,283,130 ) 23,641 —————— (1) Represents the impact of the Revenue Recognition Update on net income attributable to noncontrolling interest which was reclassed to additional paid-in capital pursuant to the Merger. Three Months Ended September 30, 2018 Statement of Operations As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Revenue: Contract operations $ 169,509 $ 170,981 $ (1,472 ) Aftermarket services 62,863 59,623 3,240 Total revenue 232,372 230,604 1,768 Cost of sales (excluding depreciation and amortization): Contract operations 69,056 73,673 (4,617 ) Aftermarket services 50,043 47,973 2,070 Total cost of sales (excluding depreciation and amortization) 119,099 121,646 (2,547 ) Selling, general and administrative 26,298 26,924 (626 ) Provision for income taxes 3,126 2,617 509 Net income attributable to Archrock stockholders 9,974 5,542 4,432 Nine Months Ended September 30, 2018 Statement of Operations As Reported Balance Excluding the Impact of the Revenue Recognition Update Effect of Change Revenue: Contract operations $ 496,156 $ 500,306 $ (4,150 ) Aftermarket services 175,126 161,065 14,061 Total revenue 671,282 661,371 9,911 Cost of sales (excluding depreciation and amortization): Contract operations 201,460 214,823 (13,363 ) Aftermarket services 143,173 132,984 10,189 Total cost of sales (excluding depreciation and amortization) 344,633 347,807 (3,174 ) Selling, general and administrative 80,455 82,051 (1,596 ) Provision for income taxes 1,913 (1,837 ) 3,750 Less: Net income attributable to the noncontrolling interest (8,097 ) (6,141 ) (1,956 ) Net income (loss) attributable to Archrock stockholders 8,095 (880 ) 8,975

Revenue from Contract with Cu_2

Revenue from Contract with Customers (Tables)	9 Months Ended
	Sep. 30, 2018
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 September 30, 2018 Nine Months Ended September 30, 2018 Contract Operations (1) : 0 - 1000 horsepower per unit $ 60,725 $ 179,917 1,001 - 1,500 horsepower per unit 69,663 204,841 Over 1,500 horsepower per unit 38,053 108,367 Other (2) 1,068 3,031 Total contract operations (3) 169,509 496,156 Aftermarket Services (1) : Services 38,863 107,776 OTC parts and components sales 24,000 67,350 Total aftermarket services (4) 62,863 175,126 Total revenue (5) $ 232,372 $ 671,282 —————— (1) We operate in two segments: contract operations and aftermarket services. See Note 20 (“Segments”) for further details regarding our segments. (2) Primarily relates to fees associated with Archrock-owned non-compressor equipment. (3) Includes $1.6 million and $4.3 million for the three and nine months ended September 30, 2018 , respectively, related to billable maintenance on Archrock-owned units that was recognized at a point in time. All other revenue within contract operations 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	As of September 30, 2018 , we had $267.3 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 2022 as follows (in thousands): 2018 2019 2020 2021 2022 Total Contract operations remaining performance obligations $ 93,227 $ 118,368 $ 46,404 $ 8,276 $ 1,073 $ 267,348

Discontinued Operations (Tables

Discontinued Operations (Tables)	9 Months Ended
	Sep. 30, 2018
Discontinued Operations and Disposal Groups [Abstract]
Summary of operating results and balance sheet data for discontinued operations	The following table summarizes the balance sheet data for discontinued operations (in thousands): September 30, 2018 December 31, 2017 Exterran Corporation Exterran Corporation Contract Water Treatment Business Total Other current assets $ 300 $ 300 $ — $ 300 Total current assets associated with discontinued operations 300 300 — 300 Other assets, net 6,421 6,421 — 6,421 Deferred income taxes (1) — — 6,842 6,842 Total assets associated with discontinued operations $ 6,721 $ 6,721 $ 6,842 $ 13,563 Other current liabilities $ 297 $ 297 $ — $ 297 Total current liabilities associated with discontinued operations 297 297 — 297 Deferred income taxes 6,421 6,421 — 6,421 Total liabilities associated with discontinued operations $ 6,718 $ 6,718 $ — $ 6,718 —————— (1) Reduced by $0.9 million for current period tax amortization and $5.9 million for a valuation allowance recorded as a result of the Merger, whereby we assessed the available positive and negative evidence and concluded, based on the weight of the evidence, that a valuation allowance was required on our resulting net deferred tax asset position, with an offsetting increase to additional paid-in capital in our condensed consolidated balance sheet as of September 30, 2018 . See Note 17 (“Equity”) for further details of the Merger.

Inventory (Tables)

Inventory (Tables)	9 Months Ended
	Sep. 30, 2018
Inventory Disclosure [Abstract]
Schedule of inventory, net of reserves	Inventory consisted of the following amounts (in thousands): September 30, 2018 December 31, 2017 Parts and supplies $ 65,393 $ 72,528 Work in progress 12,104 18,163 Inventory $ 77,497 $ 90,691

Property, Plant and Equipment_2

Property, Plant and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Abstract]
Schedule of property, plant and equipment, net	Property, plant and equipment, net, consisted of the following (in thousands): September 30, 2018 December 31, 2017 Compression equipment, facilities and other fleet assets $ 3,314,995 $ 3,192,363 Land and buildings 46,993 45,754 Transportation and shop equipment 101,868 100,133 Computer hardware and software 92,301 90,296 Other 12,867 12,419 Property, plant and equipment 3,569,024 3,440,965 Accumulated depreciation (1,403,179 ) (1,364,038 ) Property, plant and equipment, net $ 2,165,845 $ 2,076,927

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule of long-term debt	Long-term debt consisted of the following (in thousands): September 30, 2018 December 31, 2017 Credit Facility $ — $ 56,000 Partnership Credit Facility 826,500 674,306 Partnership’s 6% senior notes due April 2021 350,000 350,000 Less: Debt discount, net of amortization (1,977 ) (2,523 ) Less: Deferred financing costs, net of amortization (2,568 ) (3,338 ) 345,455 344,139 Partnership’s 6% senior notes due October 2022 350,000 350,000 Less: Debt discount, net of amortization (2,938 ) (3,441 ) Less: Deferred financing costs, net of amortization (3,338 ) (3,951 ) 343,724 342,608 Long-term debt $ 1,515,679 $ 1,417,053 The Partnership must maintain the following consolidated financial ratios, as defined in the Partnership 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 2018 5.95 to 1.0 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.

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of interest rate swaps	At September 30, 2018 , the Partnership was a party to the following interest rate swaps, which were entered into to offset changes in expected cash flows due to fluctuations in the associated variable interest rates (in millions): Expiration Date Notional Value May 2019 $ 100.0 May 2020 100.0 March 2022 300.0 $ 500.0
Effect of derivative instruments on consolidated financial position	The following tables present the effect of the derivative instruments designated as cash flow hedging instruments on our condensed consolidated balance sheets (in thousands): Fair Value Asset (Liability) September 30, 2018 December 31, 2017 Other current assets $ 3,592 $ 186 Other long-term assets 9,487 4,490 Accrued liabilities — (134 ) $ 13,079 $ 4,542
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 September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Pre-tax gain recognized in other comprehensive income (loss) $ 1,642 $ 1,919 $ 8,583 $ 2,282 Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense 429 (678 ) (83 ) (2,521 ) Three Months Ended Nine Months Ended Total amount of interest expense in which the effects of cash flow hedges are recorded $ 23,518 $ 69,402 Amount of gain reclassified from accumulated other comprehensive income (loss) into interest expense 429 582

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
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): September 30, 2018 December 31, 2017 Interest rate swaps asset $ 13,079 $ 4,676 Interest rate swaps liability — (134 )
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): September 30, 2018 December 31, 2017 Carrying amount of fixed rate debt (1) $ 689,179 $ 686,747 Fair value of fixed rate debt 706,000 702,000 —————— (1) Carrying amounts are shown net of unamortized debt discounts and unamortized deferred financing costs. See Note 8 (“Long-Term Debt”) for further details.

Long-Lived Assets Impairment (T

Long-Lived Assets Impairment (Tables)	9 Months Ended
	Sep. 30, 2018
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 September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Idle compressor units retired from the active fleet 60 50 225 190 Horsepower of idle compressor units retired from the active fleet 23,000 20,000 73,000 71,000 Impairment recorded on idle compressor units retired from the active fleet $ 6,660 $ 5,934 $ 18,323 $ 19,686 In addition to the impairment discussed above, during the three and nine months ended September 30, 2017 , $0.8 million of leasehold improvements and furniture and fixtures were impaired in conjunction with the relocation of our corporate office during the third quarter of 2017. See Note 13 (“Corporate Office Relocation”) for further details.

Corporate Office Relocation (Ta

Corporate Office Relocation (Tables)	9 Months Ended
	Sep. 30, 2018
Restructuring and Related Activities [Abstract]
Summary of changes to accrued liability balance related to restructuring and other charges	The following table summarizes the changes to our accrued liability balance related to our corporate office relocation for the nine months ended September 30, 2018 and 2017 (in thousands): Nine Months Ended September 30, 2018 2017 Beginning balance $ 583 $ — Additions for costs expensed — 2,113 Less non-cash expense (1) — (613 ) Reductions for payments (583 ) (72 ) Ending balance $ — $ 1,428 —————— (1) Represents non-cash write-off of leasehold improvements, furniture and fixtures and the net liability associated with the straight-line expense associated with the lease of our former corporate office. The following table summarizes our corporate office relocation costs by category during the three and nine months ended September 30, 2017 (in thousands): Remaining lease costs $ 1,258 Impairment of leasehold improvements and furniture and fixtures 795 Relocation costs 60 Total corporate relocation costs $ 2,113

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of stock option activity	The following table presents stock option activity during the nine months ended September 30, 2018 : Stock Options (in thousands) Weighted Average Exercise Price Per Share Weighted Average Remaining Life (in years) Aggregate Intrinsic Value (in thousands) Options outstanding, January 1, 2018 489 $ 12.28 Exercised (30 ) 8.79 Canceled (53 ) 13.96 Options outstanding and exercisable, September 30, 2018 406 12.31 0.8 $ 1,305
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 unit, cash-settled restricted stock unit and cash- settled performance unit activity during the nine months ended September 30, 2018 : Shares (in thousands) Weighted Average Grant Date Fair Value Per Share Non-vested awards, January 1, 2018 1,440 $ 10.39 Granted 1,148 9.66 Converted (1) 140 7.03 Vested (747 ) 10.46 Canceled (219 ) 9.79 Non-vested awards, September 30, 2018 (2) 1,762 9.69 —————— (1) Reflects conversion of Partnership phantom units into Archrock restricted stock units pursuant to the Merger See “Partnership Long-Term Incentive Plan” section below for detail regarding the conversion of awards. (2) Non-vested awards as of September 30, 2018 are comprised of 216,000 cash-settled restricted stock units and cash-settled performance units and 1,546,000 restricted shares and stock-settled performance units.

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2018
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 loss per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Income (loss) from continuing operations attributable to Archrock stockholders $ 9,974 $ (10,181 ) $ 8,095 $ (28,553 ) Loss from discontinued operations, net of tax — (54 ) — (54 ) Net income (loss) attributable to Archrock stockholders 9,974 (10,235 ) 8,095 (28,607 ) Less: Net income attributable to participating securities (241 ) (179 ) (554 ) (513 ) Net income (loss) attributable to Archrock common stockholders $ 9,733 $ (10,414 ) $ 7,541 $ (29,120 )
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 income (loss) attributable to Archrock common stockholders per common share (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Weighted average common shares outstanding including participating securities 129,486 70,952 104,489 70,847 Less: Weighted average participating securities outstanding (1,644 ) (1,308 ) (1,576 ) (1,327 ) Weighted average common shares outstanding — used in basic income (loss) per common share 127,842 69,644 102,913 69,520 Net dilutive potential common shares issuable: On exercise of options 111 * 96 * On the settlement of employee stock purchase plan shares 2 * 4 * Weighted average common shares outstanding — used in diluted income (loss) per common share 127,955 69,644 103,013 69,520 —————— * Excluded from diluted 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 income (loss) attributable to Archrock common stockholders per common share as their inclusion would have been anti-dilutive (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Net dilutive potential common shares issuable: On exercise of options where exercise price is greater than average market value for the period 187 240 199 278 On exercise of options — 100 — 116 Net dilutive potential common shares issuable 187 340 199 394

Equity (Tables)

Equity (Tables)	9 Months Ended
	Sep. 30, 2018
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: Nine Months Ended September 30, 2018 2017 Net income (loss) attributable to Archrock stockholders $ 8,095 $ (28,607 ) Increase in Archrock stockholders’ additional paid-in capital for purchase of Partnership common units 54,751 17,638 Change from net income (loss) attributable to Archrock stockholders and transfers from noncontrolling interest $ 62,846 $ (10,969 )
Summary of entity's dividends per common share	The following table summarizes our dividends per common share: Declaration Date Payment Date Dividends per Common Share Total Dividends (in thousands) January 19, 2017 February 15, 2017 $ 0.120 $ 8,458 April 26, 2017 May 16, 2017 0.120 8,534 July 26, 2017 August 15, 2017 0.120 8,536 October 20, 2017 November 15, 2017 0.120 8,536 January 18, 2018 February 14, 2018 0.120 8,532 April 25, 2018 May 15, 2018 0.120 15,486 July 25, 2018 August 14, 2018 0.132 17,114

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Tables)	9 Months Ended
	Sep. 30, 2018
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 nine months ended September 30, 2018 and 2017 (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Beginning accumulated other comprehensive income (loss) $ 9,374 $ (936 ) $ 1,197 $ (1,678 ) Gain recognized in other comprehensive income, net of tax provision of $345, $247, $1,234 and $290, respectively 1,298 931 3,349 1,104 (Gain) loss reclassified from accumulated other comprehensive loss to interest expense, net of tax provision (benefit) of $90, $(108), $37 and $(414), respectively (1) (339 ) 200 117 769 Merger-related adjustments (2) — — 5,670 — Other comprehensive income attributable to Archrock stockholders 959 1,131 9,136 1,873 Ending accumulated other comprehensive income $ 10,333 $ 195 $ 10,333 $ 195 —————— (1) Included stranded tax effects resulting from the TCJA of $0.3 million reclassified to accumulated deficit during the nine months ended September 30, 2018 . See Note 2 (“Recent Accounting Developments”) for further details. (2) 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.

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 30, 2018
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 nine months ended September 30, 2018 and 2017 (in thousands): Contract Operations Aftermarket Services Total Three months ended September 30, 2018 Revenue $ 169,509 $ 62,863 $ 232,372 Gross margin 100,453 12,820 113,273 Three months ended September 30, 2017 Revenue $ 153,524 $ 44,329 $ 197,853 Gross margin 81,573 5,843 87,416 Nine months ended September 30, 2018 Revenue $ 496,156 $ 175,126 $ 671,282 Gross margin 294,696 31,953 326,649 Nine months ended September 30, 2017 Revenue $ 454,622 $ 131,098 $ 585,720 Gross margin 256,331 19,271 275,602
Reconciliation of net income (loss) to gross margin	The following table reconciles total gross margin to income (loss) before income taxes (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Total gross margin $ 113,273 $ 87,416 $ 326,649 $ 275,602 Less: Selling, general and administrative 26,298 29,108 80,455 81,823 Depreciation and amortization 43,779 47,463 131,565 142,483 Long-lived asset impairment 6,660 7,105 18,323 20,858 Restatement and other charges 396 566 (195 ) 3,287 Restructuring and other charges — 422 — 1,245 Interest expense 23,518 22,892 69,402 66,817 Debt extinguishment loss — — 2,450 291 Merger-related costs 182 — 9,993 — Other income, net (660 ) (2,716 ) (3,449 ) (4,472 ) Income (loss) before income taxes $ 13,100 $ (17,424 ) $ 18,105 $ (36,730 )

Organization (Details)

Organization (Details)	9 Months Ended
	Sep. 30, 2018segment
Accounting Policies [Abstract]
Number of reportable segments	2

Recent Accounting Development_3

Recent Accounting Developments (Narratives) (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle
Cumulative effect on other comprehensive income		$ 959	$ 2,290	$ 13,141	$ 4,149
ASU 2017-12
New Accounting Pronouncements or Change in Accounting Principle
Cumulative effect on retained earnings						$ 383
ASU 2016-02 | Pro Forma
New Accounting Pronouncements or Change in Accounting Principle
Right-of-use asset, less than		25,000		25,000
Lease liability, less than		$ 25,000		$ 25,000
Accumulated Other Comprehensive Income (Loss)
New Accounting Pronouncements or Change in Accounting Principle
Adjustments related to TCJA	$ (300)
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle
Adjustments related to TCJA	$ 300
Accumulated Deficit | ASU 2017-12
New Accounting Pronouncements or Change in Accounting Principle
Cumulative effect on retained earnings						$ 383

Recent Accounting Development_4

Recent Accounting Developments - Balance Sheet Impact (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Accounts receivable, trade	$ 141,781	$ 121,299	$ 113,416
Inventory	77,497	83,774	90,691
Contract costs	36,482	21,524	0
Liabilities
Accrued liabilities	74,879	71,325	71,116
Deferred revenue	12,909	8,046	4,858
Deferred income taxes	2,845	102,370	97,943
Accounts payable, trade	70,950		54,585
Other long-term liabilities	19,612		20,116
Equity
Additional paid-in capital	3,154,058		3,093,058
Accumulated deficit	(2,259,489)	(2,226,577)	$ (2,241,243)
Calculated under Revenue Guidance in Effect before Topic 606
Assets
Accounts receivable, trade	123,079
Inventory	94,528
Contract costs	0
Liabilities
Accrued liabilities	74,619
Deferred revenue	8,865
Deferred income taxes	2,570
Accounts payable, trade	70,875
Other long-term liabilities	19,595
Equity
Additional paid-in capital	3,144,217
Accumulated deficit	(2,283,130)
Adjustments Due to the Revenue Recognition Update | ASU 2014-09
Assets
Accounts receivable, trade	18,702	7,883
Inventory	(17,031)	(6,917)
Contract costs	36,482	21,524
Liabilities
Accrued liabilities	260	209
Deferred revenue	4,044	3,188
Deferred income taxes	275	4,427
Accounts payable, trade	75
Other long-term liabilities	17
Equity
Additional paid-in capital	9,841
Accumulated deficit	$ 23,641	$ 14,666

Recent Accounting Development_5

Recent Accounting Developments - Income Statement Impact (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue:
Revenues	$ 232,372	$ 197,853	$ 671,282	$ 585,720
Total cost of sales (excluding depreciation and amortization)	119,099	110,437	344,633	310,118
Selling, general and administrative	26,298	29,108	80,455	81,823
Provision for (benefit from) income taxes	3,126	(4,795)	1,913	(6,052)
Less: Net (income) loss attributable to the noncontrolling interest	0	2,448	(8,097)	2,125
Net income attributable to Archrock stockholders	9,974	(10,235)	8,095	(28,607)
Contract Operations | Contract operations
Revenue:
Revenues	169,509	153,524	496,156	454,622
Total cost of sales (excluding depreciation and amortization)	69,056	71,951	201,460	198,291
Aftermarket Services | Aftermarket services
Revenue:
Revenues	62,863	44,329	175,126	131,098
Total cost of sales (excluding depreciation and amortization)	50,043	$ 38,486	143,173	$ 111,827
Balance Excluding the Impact of the Revenue Recognition Update
Revenue:
Revenues	230,604		661,371
Total cost of sales (excluding depreciation and amortization)	121,646		347,807
Selling, general and administrative	26,924		82,051
Provision for (benefit from) income taxes	2,617		(1,837)
Less: Net (income) loss attributable to the noncontrolling interest			(6,141)
Net income attributable to Archrock stockholders	5,542		(880)
Balance Excluding the Impact of the Revenue Recognition Update | Contract Operations | Contract operations
Revenue:
Revenues	170,981		500,306
Total cost of sales (excluding depreciation and amortization)	73,673		214,823
Balance Excluding the Impact of the Revenue Recognition Update | Aftermarket Services | Aftermarket services
Revenue:
Revenues	59,623		161,065
Total cost of sales (excluding depreciation and amortization)	47,973		132,984
Effect of Change | ASU 2014-09
Revenue:
Revenues	1,768		9,911
Total cost of sales (excluding depreciation and amortization)	(2,547)		(3,174)
Selling, general and administrative	(626)		(1,596)
Provision for (benefit from) income taxes	509		3,750
Less: Net (income) loss attributable to the noncontrolling interest			(1,956)
Net income attributable to Archrock stockholders	4,432		8,975
Effect of Change | ASU 2014-09 | Contract Operations | Contract operations
Revenue:
Revenues	(1,472)		(4,150)
Total cost of sales (excluding depreciation and amortization)	(4,617)		(13,363)
Effect of Change | ASU 2014-09 | Aftermarket Services | Aftermarket services
Revenue:
Revenues	3,240		14,061
Total cost of sales (excluding depreciation and amortization)	$ 2,070		$ 10,189

Revenue from Contract with Cu_3

Revenue from Contract with Customers - Disaggregate Revenue (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)
Disaggregation of Revenue
Number of reportable segments | segment			2
Contract revenue	$ 232,372	$ 197,853	$ 671,282	$ 585,720
Contract Operations | Transferred at point in time
Disaggregation of Revenue
Contract revenue	1,600		4,300
Contract Operations | Contract operations
Disaggregation of Revenue
Contract revenue	169,509	153,524	496,156	454,622
Contract Operations | 0 - 1000 horsepower per unit
Disaggregation of Revenue
Contract revenue	60,725		179,917
Contract Operations | 1,001 - 1,500 horsepower per unit
Disaggregation of Revenue
Contract revenue	69,663		204,841
Contract Operations | Over 1,500 horsepower per unit
Disaggregation of Revenue
Contract revenue	38,053		108,367
Contract Operations | Other
Disaggregation of Revenue
Contract revenue	1,068		3,031
Aftermarket Services | Aftermarket services
Disaggregation of Revenue
Contract revenue	62,863	$ 44,329	175,126	$ 131,098
Aftermarket Services | Services
Disaggregation of Revenue
Contract revenue	38,863		107,776
Aftermarket Services | OTC parts and components sales
Disaggregation of Revenue
Contract revenue	$ 24,000		$ 67,350

Revenue from Contract with Cu_4

Revenue from Contract with Customers - Remaining Performance Obligation (Details) $ in Thousands	Sep. 30, 2018USD ($)
Revenue from Contract with Customer [Abstract]
Contract operations remaining performance obligations	$ 267,348
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue from Contract with Customer [Abstract]
Contract operations remaining performance obligations	$ 93,227
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied, expected timing	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue from Contract with Customer [Abstract]
Contract operations remaining performance obligations	$ 118,368
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]: 2020-01-01
Revenue from Contract with Customer [Abstract]
Contract operations remaining performance obligations	$ 46,404
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]
Contract operations remaining performance obligations	$ 1,073
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Performance obligations expected to be satisfied, expected timing	1 year

Revenue from Contract with Cu_5

Revenue from Contract with Customers - Contract Balances (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Disaggregation of Revenue
Accounts receivable, trade	$ 141,781	$ 121,299	$ 113,416
Contract liability with customer	13,300	9,000
Increase in contract liability from freight billing and after market services	21,800
Revenue from contract liability	17,400
Contract with customers
Disaggregation of Revenue
Accounts receivable, trade	$ 136,800	$ 115,600

Discontinued Operations (Narrat

Discontinued Operations (Narratives) (Details) - USD ($) $ in Millions	Apr. 11, 2017	Sep. 30, 2018	Sep. 30, 2017	Mar. 31, 2017
Discontinued Operations
Amortization of deferred tax asset		$ 0.9
Valuation allowance		5.9
Exterran Corporation
Discontinued Operations
Unrecognized tax benefits		6.4
Indemnification asset		6.4
Exterran Corporation | Spinoff
Discontinued Operations
Compression units acquired			$ 115.3
Exterran Corporation
Discontinued Operations
Proceeds from sale of expropriated assets installment payment			$ 19.7
Scheduled installment payments		$ 20.9
Due from affiliate				$ 25
Proceeds from affiliate	$ 25

Discontinued Operations - Balan

Discontinued Operations - Balance Sheet Data for Discontinued Operations (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Summary of balance sheet data for discontinued operations
Other current assets		$ 300
Total current assets associated with discontinued operations	$ 300	300
Other assets, net		6,421
Deferred income taxes		6,842
Total assets associated with discontinued operations		13,563
Other current liabilities		297
Total current liabilities associated with discontinued operations	297	297
Deferred income taxes		6,421
Total liabilities associated with discontinued operations		6,718
Spinoff | Exterran Corporation
Summary of balance sheet data for discontinued operations
Other current assets	300	300
Total current assets associated with discontinued operations	300	300
Other assets, net	6,421	6,421
Deferred income taxes	0	0
Total assets associated with discontinued operations	6,721	6,721
Other current liabilities	297	297
Total current liabilities associated with discontinued operations	297	297
Deferred income taxes	6,421	6,421
Total liabilities associated with discontinued operations	$ 6,718	6,718
Abandonment | Contract Water Treatment Business
Summary of balance sheet data for discontinued operations
Other current assets		0
Total current assets associated with discontinued operations		0
Other assets, net		0
Deferred income taxes		6,842
Total assets associated with discontinued operations		6,842
Other current liabilities		0
Total current liabilities associated with discontinued operations		0
Deferred income taxes		0
Total liabilities associated with discontinued operations		$ 0

Inventory (Details)

Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018	Dec. 31, 2017
Composition of Inventory net of reserves
Parts and supplies	$ 65,393		$ 72,528
Work in progress	12,104		18,163
Inventory	$ 77,497	$ 83,774	$ 90,691

Property, Plant and Equipment_3

Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property, Plant and Equipment
Property, plant and equipment, gross	$ 3,569,024	$ 3,440,965
Accumulated depreciation	(1,403,179)	(1,364,038)
Property, plant and equipment, net	2,165,845	2,076,927
Compression equipment, facilities and other fleet assets
Property, Plant and Equipment
Property, plant and equipment, gross	3,314,995	3,192,363
Land and buildings
Property, Plant and Equipment
Property, plant and equipment, gross	46,993	45,754
Transportation and shop equipment
Property, Plant and Equipment
Property, plant and equipment, gross	101,868	100,133
Computer hardware and software
Property, Plant and Equipment
Property, plant and equipment, gross	92,301	90,296
Other
Property, Plant and Equipment
Property, plant and equipment, gross	$ 12,867	$ 12,419

Contract Costs (Details)

Contract Costs (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Disaggregation of Revenue
Contract costs	$ 36,482,000	$ 36,482,000		$ 21,524,000	$ 0
Capitalized contract, term	36 months	36 months
Amortization of contract costs		$ 10,332,000	$ 0
Impairment of contract costs	$ 0	0
Sales Commissions
Disaggregation of Revenue
Contract costs	3,900,000	3,900,000		2,300,000
Amortization of contract costs	400,000	1,100,000
Freight and Mobilization
Disaggregation of Revenue
Contract costs	32,600,000	32,600,000		$ 19,200,000
Amortization of contract costs	$ 3,600,000	$ 9,200,000

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument
Long-term debt	$ 1,515,679	$ 1,417,053
Senior Notes | Partnership’s 6% senior notes due April 2021
Debt Instrument
Long term debt gross	350,000	350,000
Less: Debt discount, net of amortization	(1,977)	(2,523)
Less: Deferred financing costs, net of amortization	(2,568)	(3,338)
Long-term debt	$ 345,455	344,139
Interest rate (as a percent)	6.00%
Senior Notes | Partnership’s 6% senior notes due October 2022
Debt Instrument
Long term debt gross	$ 350,000	350,000
Less: Debt discount, net of amortization	(2,938)	(3,441)
Less: Deferred financing costs, net of amortization	(3,338)	(3,951)
Long-term debt	343,724	342,608
Revolving Credit Facility | Credit Facility
Debt Instrument
Long-term debt	0	56,000
Revolving Credit Facility | Partnership Credit Facility
Debt Instrument
Long-term debt	$ 826,500	$ 674,306

Long-Term Debt - Archrock Credi

Long-Term Debt - Archrock Credit Facility (Details) - USD ($) $ in Thousands	Apr. 26, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Line of Credit Facility
Repayments of long-term debt				$ 440,636	$ 1,118,000
Debt extinguishment loss		$ 0	$ 0	2,450	291
Revolving Credit Facility
Line of Credit Facility
Commitment fee amount				1,700	1,500
Revolving Credit Facility | Revolving Credit Facility Due November 2020
Line of Credit Facility
Repayments of long-term debt	$ 63,200
Letter of credit outstanding	$ 15,400
Debt extinguishment loss				2,500
Debt instrument weighted average interest rate (percent)						3.30%
Commitment fee amount			$ 200	$ 200	$ 500

Long-Term Debt - The Partnershi

Long-Term Debt - The Partnership Asset-Based Revolving Credit Facility (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended	9 Months Ended
	Mar. 31, 2017	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Apr. 26, 2018	Mar. 31, 2018	Dec. 31, 2017
Line of Credit Facility
Payments for debt issuance costs					$ 3,332,000	$ 14,855,000
Loss on extinguishment of debt		$ 0	$ 0		$ 2,450,000	291,000
Partnership’s 6% senior notes due April 2021 | Senior Notes
Line of Credit Facility
Interest rate (as a percent)		6.00%			6.00%
Revolving Credit Facility
Line of Credit Facility
Commitment fee amount					$ 1,700,000	$ 1,500,000
Revolving Credit Facility | Archrock Partners, L.P
Line of Credit Facility
Undrawn capacity under revolving credit facility		$ 408,100,000			408,100,000
Revolving Credit Facility | Archrock Partners, L.P | Maximum
Line of Credit Facility
Undrawn capacity under revolving credit facility		324,000,000			$ 324,000,000
Revolving Credit Facility | Partnership Credit Facility
Line of Credit Facility
Debt instrument, term					5 years
Revolving credit facility borrowing capacity		1,250,000,000			$ 1,250,000,000		$ 1,250,000,000	$ 1,100,000,000
Payments for debt issuance costs	$ 14,900,000			$ 3,300,000
Letter of credit outstanding		15,400,000			$ 15,400,000
Revolving Credit Facility | Partnership Credit Facility | Base rate
Line of Credit Facility
Debt instrument, variable rate (percentage)					3.20%
Revolving Credit Facility | Former facility
Line of Credit Facility
Amortized deferred financing cost	600,000
Loss on extinguishment of debt	$ 300,000
Revolving Credit Facility | Partnership Credit Facility
Line of Credit Facility
Commitment fee amount		$ 600,000
Letter of Credit | Partnership Credit Facility
Line of Credit Facility
Revolving credit facility borrowing capacity							$ 50,000,000	$ 25,000,000
Line of Credit
Line of Credit Facility
Debt instrument weighted average interest rate (percent)		5.50%			5.50%				4.80%

Long-Term Debt - Debt Ratios (D

Long-Term Debt - Debt Ratios (Details) - Archrock Partners, L.P - Revolving Credit Facility	6 Months Ended	9 Months Ended	12 Months Ended		21 Months Ended
	Jun. 30, 2020	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	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	5.95	5.25
Forecasted | Conditional Event
Line of Credit Facility
Total Debt to EBITDA ratio					5.50

Derivatives - Interest Rate Ris

Derivatives - Interest Rate Risk (Details) - Derivatives designated as hedging instruments - USD ($) $ in Millions	Sep. 30, 2018	Aug. 31, 2017
Interest rate swaps
Notional Disclosures
Notional amount of interest rate swaps	$ 500
May 2,019
Notional Disclosures
Notional amount of interest rate swaps	100
May 2,020
Notional Disclosures
Notional amount of interest rate swaps	100
March 2,022
Notional Disclosures
Notional amount of interest rate swaps	$ 300	$ 300

Derivatives - Interest Rate R_2

Derivatives - Interest Rate Risk (Narratives) (Details) - Derivatives designated as hedging instruments - USD ($) $ in Millions	Sep. 30, 2018	Aug. 31, 2017
March 2,022
Derivatives
Notional amount of interest rate swaps	$ 300	$ 300
Derivative liability fair value		$ 0.7
Interest rate swaps
Derivatives
Deferred pre-tax losses to be reclassified during next 12 months	3.6
Notional amount of interest rate swaps	$ 500
Weighted average effective fixed interest rate on interest rate swaps (as a percent)	1.80%

Derivatives - Effect of Derivat

Derivatives - Effect of Derivative Instruments on Balance Sheet (Details) - Derivatives designated as hedging instruments - Interest rate swaps - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value Asset (Liability)
Total derivatives	$ 13,079	$ 4,542
Other current assets
Fair Value Asset (Liability)
Derivative assets	3,592	186
Other long-term assets
Fair Value Asset (Liability)
Derivative assets	9,487	4,490
Accrued liabilities
Fair Value Asset (Liability)
Derivative liabilities	$ 0	$ (134)

Derivatives - Effect of Deriv_2

Derivatives - Effect of Derivative Instruments on Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Effect of derivative instruments on results of operations
Pre-tax gain recognized in other comprehensive income (loss)	$ 1,642	$ 1,919	$ 8,583	$ 2,282
Interest expense
Effect of derivative instruments on results of operations
Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	$ 429	$ (678)	$ (83)	$ (2,521)

Derivatives - Derivative Gain (

Derivatives - Derivative Gain (Loss) Recognized in Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Effect of derivative instruments on results of operations
Interest expense	$ 23,518	$ 22,892	$ 69,402	$ 66,817
Accumulated Other Comprehensive Income (Loss) | Reclassification adjustments
Effect of derivative instruments on results of operations
Interest expense	$ 429		$ 582

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) - Recurring basis - Level 2 - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair value measurement of assets and liabilities
Interest rate swaps asset	$ 13,079	$ 4,676
Interest rate swaps liability	$ 0	$ (134)

Fair Value Measurements (Narrat

Fair Value Measurements (Narratives) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Nonrecurring basis | Level 3
Valuation of our interest rate swaps and impaired assets
Impaired long-lived assets	$ 1.5	$ 2.6
Impaired long-lived assets
Valuation of our interest rate swaps and impaired assets
Weighted average disposal period of impaired assets	4 years

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Debt (Details) - Fixed rate debt - Level 2 - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 689,179	$ 686,747
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Long-term debt, fair value	$ 706,000	$ 702,000

Long-Lived Asset Impairment (De

Long-Lived Asset Impairment (Details) - Idle compressor units hp in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)compressor_unithp	Sep. 30, 2017USD ($)compressor_unithp	Sep. 30, 2018USD ($)compressor_unithp	Sep. 30, 2017USD ($)compressor_unithp
Impaired Long-Lived Assets Held and Used
Idle compressor units retired from the active fleet (compressors) | compressor_unit	60	50	225	190
Horsepower of idle compressor units retired from the active fleet (horsepower) | hp	23	20	73	71
Impairment recorded on idle compressor units retired from the active fleet | $	$ 6,660	$ 5,934	$ 18,323	$ 19,686

Long-Lived Asset Impairment - N

Long-Lived Asset Impairment - Narratives (Details) - Corporate Office Relocation - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property, Plant and Equipment
Additions for costs expensed	$ 2,100	$ 0	$ 2,113
Impairment of leasehold improvements and furniture and fixtures
Property, Plant and Equipment
Additions for costs expensed	$ 795		$ 795

Restructuring and Other Charg_2

Restructuring and Other Charges (Narratives) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring and Other Charges
Restructuring and other charges	$ 0	$ 422	$ 0	$ 1,245
Spin-off
Restructuring and Other Charges
Restructuring and other charges		$ 400		$ 1,200

Corporate Office Relocation - A

Corporate Office Relocation - Accrual Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring and Other Charges
Beginning balance		$ 71,116
Ending balance		74,879
Corporate Office Relocation
Restructuring and Other Charges
Beginning balance		583	$ 0
Additions for costs expensed	$ 2,100	0	2,113
Less non-cash expenses		0	(613)
Reductions for payments		(583)	(72)
Ending balance	$ 1,428	$ 0	$ 1,428

Corporate Office Relocation - C

Corporate Office Relocation - Contract Termination and Relocation (Details) - Corporate Office Relocation - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring and Other Charges
Additions for costs expensed	$ 2,100	$ 0	$ 2,113
Remaining lease costs
Restructuring and Other Charges
Additions for costs expensed			1,258
Impairment of leasehold improvements and furniture and fixtures
Restructuring and Other Charges
Additions for costs expensed	$ 795		795
Relocation costs
Restructuring and Other Charges
Additions for costs expensed			$ 60

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2018
Income Taxes
Potential decrease in unrecognized tax benefit		$ 0.9
Tax cuts and jobs act, income tax benefit	$ 53.4
Other Comprehensive Income (Loss)
Income Taxes
Tax cuts and jobs act, income tax benefit	0.3
Continuing Operations
Income Taxes
Tax cuts and jobs act, income tax benefit	57.7
Discontinued Operations
Income Taxes
Tax cuts and jobs act, income tax benefit	$ 4.6

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock Incentive Plan (Narratives) (Details) - 2013 Plan	Apr. 30, 2013shares
Stock-Based Compensation
Maximum number of shares available under the Plan	10,100,000
Stock options
Stock-Based Compensation
Number of shares counted by each award	1
Stock-settled award other than an option, stock appreciation right or award for which the recipient pays intrinsic value
Stock-Based Compensation
Number of shares counted by each award	1.75

Stock-Based Compensation - St_2

Stock-Based Compensation - Stock Option Activity (Narratives) (Details) - Stock options $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)
Stock-Based Compensation
Intrinsic value of options exercised	$ 0.1
First anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Second anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Third anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Vesting period	3 years
Maximum
Stock-Based Compensation
Expiration period	7 years

Stock-Based Compensation - St_3

Stock-Based Compensation - Stock Options Activity (Details) - Stock options $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)$ / sharesshares
Stock Options
Options outstanding at the beginning of the period (in shares) | shares	489
Exercised (in shares) | shares	(30)
Cancelled (in shares) | shares	(53)
Options outstanding at the end of the period (in shares) | shares	406
Options exercisable at the end of the period (in shares) | shares	406
Weighted Average Exercise Price Per Share
Options outstanding at the beginning of the period (in dollars per share) | $ / shares	$ 12.28
Exercised (in dollars per share) | $ / shares	8.79
Cancelled (in dollars per share) | $ / shares	13.96
Options outstanding at end of period, (in dollars per share) | $ / shares	12.31
Options exercisable at the end of period (in dollars per share) | $ / shares	$ 12.31
Weighted Average Remaining Life
Outstanding at the end of the period	9 months 18 days
Exercisable at the end of the period	9 months 18 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars) | $	$ 1,305
Exercisable at the end of the period (in dollars) | $	$ 1,305

Stock-Based Compensation - Rest

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	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Shares
Non-vested awards at the beginning of the period (in shares) | shares	1,440
Granted (in shares) | shares	1,148
Converted (in shares) | shares	140
Vested (in shares) | shares	(747)
Canceled (in shares) | shares	(219)
Non-vested awards at the end of the period (in shares) | shares	1,762
Weighted Average Grant Date Fair Value Per Share
Non-vested awards at the beginning of the period (in dollars per share) | $ / shares	$ 10.39
Granted (in dollars per share) | $ / shares	9.66
Converted (in dollars per share) | $ / shares	7.03
Vested (in dollars per share) | $ / shares	10.46
Canceled (in dollars per share) | $ / shares	9.79
Non-vested awards at the end of the period (in dollars per share) | $ / shares	$ 9.69

Stock-Based Compensation - Re_2

Stock-Based Compensation - Restricted Stock, Restricted Stock Units, and Performance Units Activity (Narratives) (Details) - USD ($) shares in Thousands, $ in Millions	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Cash settled restricted stock units and cash settled performance units
Stock-Based Compensation
Non-vested awards at the end of the period (in shares)	216
Restricted stock shares, restricted stock units and performance units
Stock-Based Compensation
Non-vested awards at the end of the period (in shares)	1,546
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)	1,762	1,440
Unrecognized compensation
Expected unrecognized compensation cost related to unvested awards (in dollars)	$ 13.2
Weighted-average period over which the expected unrecognized compensation cost related to unvested stock options will be recognized	2 years 3 months 18 days
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units | First anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units | Second anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Restricted stock, restricted stock units, performance units, cash settled restricted stock units and cash settled performance units | Third anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Vesting period	3 years

Stock-Based Compensation - Part

Stock-Based Compensation - Partnership Long Term Incentive Plan and Phantom Unit Activity (Narratives) (Details)	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Partnership Phantom Units | First anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Partnership Phantom Units | Second anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Partnership Phantom Units | Third anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Restricted stock units
Stock-Based Compensation
Vested (in shares) | shares	747,000
Vested (in dollars per share) | $ / shares	$ 10.46
Restricted stock units | First anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Restricted stock units | Second anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Restricted stock units | Third anniversary vesting
Stock-Based Compensation
Vesting percentage	33.33%
Partnership Long Term Incentive Plan | Partnership Phantom Units
Stock-Based Compensation
Vested (in shares) | shares	53,091
Vested (in dollars per share) | $ / shares	$ 11.24

Earnings per Share - Net Income

Earnings per Share - Net Income Attributable to Archrock Common Stockholders (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Summary of net income attributable to Archrock common stockholders used in the calculation of basic and diluted income per common share
Income (loss) from continuing operations attributable to Archrock stockholders	$ 9,974	$ (10,181)	$ 8,095	$ (28,553)
Loss from discontinued operations, net of tax	0	(54)	0	(54)
Net income (loss) attributable to Archrock stockholders	9,974	(10,235)	8,095	(28,607)
Less: Net income attributable to participating securities	(241)	(179)	(554)	(513)
Net income (loss) attributable to Archrock common stockholders	$ 9,733	$ (10,414)	$ 7,541	$ (29,120)
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)	129,486	70,952	104,489	70,847
Less: Weighted average participating securities outstanding (in shares)	(1,644)	(1,308)	(1,576)	(1,327)
Weighted average common shares outstanding — used in basic income (loss) per common share (in shares)	127,842	69,644	102,913	69,520
Net dilutive potential common shares issuable:
Weighted average common shares outstanding - used in diluted income (loss) per common share (in shares)	127,955	69,644	103,013	69,520
On the settlement of employee stock purchase plan shares
Net dilutive potential common shares issuable:
On exercise of options (in shares)	2		4
On exercise of options
Net dilutive potential common shares issuable:
On exercise of options (in shares)	111		96

Earnings per Share - Anti-dilut

Earnings per Share - Anti-dilutive Shares (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)	187	340	199	394
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)	187	240	199	278
On exercise of options
Anti-dilutive effect of the calculation of net dilutive potential shares of common stock issuable
Net dilutive potential common shares issuable (shares)	0	100	0	116

Equity (Narratives) (Details)

Equity (Narratives) (Details) $ / shares in Units, $ in Thousands	Oct. 24, 2018$ / shares	Apr. 26, 2018USD ($)shares	Apr. 25, 2018	Aug. 31, 2017USD ($)shares	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)
Class of Stock
Ownership percentage held by reporting entity			57.00%
Deferred tax asset, net					$ 55,000		$ 55,000
Deferred tax asset valuation allowance					53,400		53,400
Adjustments to additional paid in capital, deferred tax asset							103,100
Merger-related costs					$ 182	$ 0	$ 9,993	$ 0
Net proceeds from sale of partnership units, net of tax								$ 49,726
Subsequent Event
Distributions
Dividend declared per common stock (in dollars per share) | $ / shares	$ 0.132
Limited Partner Common Units
Class of Stock
Shares issued (shares) | shares				4,600,000
Shares issued, value				$ 60,300
Limited Partner Common Units | Parent Company
Class of Stock
Net proceeds from sale of partnership units, net of tax				$ 1,300
General partner units interest (as a percentage)				2.00%
General Partner
Class of Stock
Partners' capital accounts (units) | shares				93,163
Over-allotment option | Limited Partner Common Units
Class of Stock
Shares issued (shares) | shares				600,000
Partnership Merger
Class of Stock
Deferred tax asset acquired		$ 156,500
Partnership Merger | Common Stock
Class of Stock
Business acquisition, shares issued (shares) | shares		57,600,000
Business acquisition, shares acquired (shares) | shares		41,200,000
Share conversion rate (per share)		1.40
Value of shares used as consideration		$ 625,300

Equity - Effects of Change in O

Equity - Effects of Change in Ownership (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Equity [Abstract]
Net income (loss) attributable to Archrock stockholders	$ 9,974	$ (10,235)	$ 8,095	$ (28,607)
Increase in Archrock stockholders’ additional paid-in capital for purchase of Partnership common units			54,751	17,638
Change from net income (loss) attributable to Archrock stockholders and transfers from noncontrolling interest			$ 62,846	$ (10,969)

Equity - Cash Dividends (Detail

Equity - Cash Dividends (Details) - USD ($) $ / shares in Units, $ in Thousands	Aug. 14, 2018	May 15, 2018	Feb. 14, 2018	Nov. 15, 2017	Aug. 15, 2017	May 16, 2017	Feb. 15, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Distributions
Dividends per Common Share (in dollars per share)	$ 0.132	$ 0.1200	$ 0.12	$ 0.12	$ 0.1200	$ 0.12	$ 0.1200	$ 0.132	$ 0.1200	$ 0.372	$ 0.36
Total Dividends	$ 17,114	$ 15,486	$ 8,532	$ 8,536	$ 8,536	$ 8,534	$ 8,458			$ 41,132	$ 25,528

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Jan. 01, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Increase (Decrease) in Stockholders' Equity
Beginning balance	$ 735,618			$ 735,618	$ 684,928
Merger-related adjustments		$ 0	$ 0	5,670	0
Total other comprehensive income		959	2,290	13,141	4,149
Ending balance		827,798	701,450	827,798	701,450
Cash flow hedge
Increase (Decrease) in Stockholders' Equity
Beginning balance	1,197	9,374	(936)	1,197	(1,678)
Gain recognized in other comprehensive income, net of tax provision of $345, $247, $1,234 and $290, respectively		1,298	931	3,349	1,104
(Gain) loss reclassified from accumulated other comprehensive loss to interest expense, net of tax provision (benefit) of $90, $(108), $37 and $(414), respectively (1)		(339)	200	117	769
Merger-related adjustments		0	0	5,670	0
Total other comprehensive income		959	1,131	9,136	1,873
Ending balance		10,333	195	10,333	195
Gain recognized in other comprehensive income, tax		345	247	1,234	290
Loss reclassified from accumulated other comprehensive loss, tax		90	(108)	37	(414)
Adjustments related to TCJA				(300)
Noncontrolling Interest
Increase (Decrease) in Stockholders' Equity
Beginning balance	(41,431)			(41,431)	(34,038)
Merger-related adjustments				(5,700)
Ending balance		0	(33,879)	0	(33,879)
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity
Beginning balance	1,197			1,197	(1,678)
Merger-related adjustments				5,670
Ending balance		$ 10,333	$ 195	$ 10,333	$ 195
Adjustments related to TCJA	$ (300)

Commitments and Contingencies -

Commitments and Contingencies - Guarantees Not Recorded on Balance Sheet (Details) $ in Millions	Sep. 30, 2018USD ($)
Performance bonds
Commitments and contingencies
Maximum potential undiscounted payments	$ 2.3

Commitments and Contingencies (

Commitments and Contingencies (Narratives) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018USD ($)claimcase	Dec. 31, 2017USD ($)
Loss contingency
Accrued liability for the outcomes of non-income based tax audits | $	$ 3.2	$ 1.7
Indemnification liability | $	$ 1.6	$ 1.6
Loss Contingencies [Line Items]
Number of cases settled	3
Number of cases appealed	3
Number of pending cases | case	2
Similar Judge
Loss Contingencies [Line Items]
Number of cases settled	2

Segments (Narratives) (Details)

Segments (Narratives) (Details)	9 Months Ended
	Sep. 30, 2018segment
Segment Reporting [Abstract]
Number of reportable segments	2

Segments - Revenue and Gross Ma

Segments - Revenue and Gross Margin by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenue and other financial information by reportable segment
Revenues	$ 232,372	$ 197,853	$ 671,282	$ 585,720
Total gross margin	113,273	87,416	326,649	275,602
Contract Operations
Revenue and other financial information by reportable segment
Total gross margin	100,453	81,573	294,696	256,331
Contract Operations | Contract operations
Revenue and other financial information by reportable segment
Revenues	169,509	153,524	496,156	454,622
Aftermarket Services
Revenue and other financial information by reportable segment
Total gross margin	12,820	5,843	31,953	19,271
Aftermarket Services | Aftermarket services
Revenue and other financial information by reportable segment
Revenues	$ 62,863	$ 44,329	$ 175,126	$ 131,098

Segments - Reconciliation of Ne

Segments - Reconciliation of Net Income to Gross Margin (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reconciliation Net Income (Loss) to Gross Margin
Total gross margin	$ 113,273	$ 87,416	$ 326,649	$ 275,602
Less:
Selling, general and administrative	26,298	29,108	80,455	81,823
Depreciation and amortization	43,779	47,463	131,565	142,483
Long-lived asset impairment	6,660	7,105	18,323	20,858
Restatement and other charges	396	566	(195)	3,287
Restructuring and other charges	0	422	0	1,245
Interest expense	23,518	22,892	69,402	66,817
Debt extinguishment loss	0	0	2,450	291
Merger-related costs	182	0	9,993	0
Other income, net	(660)	(2,716)	(3,449)	(4,472)
Income (loss) before income taxes	$ 13,100	$ (17,424)	$ 18,105	$ (36,730)