Archrock Partners (APLP) 10-Q 3 May 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 26, 2016
Document and Entity Information
Entity Registrant Name	ARCHROCK PARTNERS, L.P.
Entity Central Index Key	1,367,064
Document Type	10-Q
Document Period End Date	Mar. 31, 2016
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		60,035,818
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 753	$ 472
Accounts receivable, trade, net of allowance of $1,185 and $2,463, respectively	80,879	85,183
Due from affiliates, net	526	0
Total current assets	82,158	85,655
Property, plant and equipment	2,670,070	2,661,996
Accumulated depreciation	(861,174)	(846,213)
Property, plant and equipment, net	1,808,896	1,815,783
Intangible and other assets, net	92,894	93,215
Total assets	1,983,948	1,994,653
Current liabilities:
Accrued liabilities	9,489	6,696
Accrued interest	22,801	12,443
Due to affiliates, net	0	5,980
Current portion of interest rate swaps	4,949	4,608
Total current liabilities	37,239	29,727
Long-term debt	1,428,710	1,410,382
Deferred income taxes	995	1,054
Other long-term liabilities	9,635	5,494
Total liabilities	$ 1,476,579	$ 1,446,657
Commitments and contingencies (Note 13)
Partners’ capital:
Common units, 60,122,062 and 59,796,514 units issued, respectively	$ 507,904	$ 538,197
General partner units, 2% and 1,214,767 interest with 1,209,562 equivalent units issued and outstanding, respectively	11,802	17,151
Accumulated other comprehensive loss	(10,454)	(5,558)
Treasury units, 86,244 and 74,888 common units, respectively	(1,883)	(1,794)
Total partners’ capital	507,369	547,996
Total liabilities and partners’ capital	$ 1,983,948	$ 1,994,653

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, trade, allowance (in dollars)	$ 1,185	$ 2,463
Common units, units issued	60,122,062	59,796,514
General partner units, interest (as a percent)	2.00%	2.00%
General partner units, equivalent units issued	1,214,767	1,209,562
General partner units, equivalent units outstanding	1,214,767	1,209,562
Treasury units, common units	86,244	74,888

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenue	$ 151,424	$ 164,295
Costs and expenses:
Cost of sales (excluding depreciation and amortization expense) — affiliates	57,860	65,168
Depreciation and amortization	39,237	36,105
Long-lived asset impairment	6,315	3,484
Restructuring charges	4,139	0
Selling, general and administrative — affiliates	23,679	21,169
Interest expense	18,742	17,832
Other (income) loss, net	838	(191)
Total costs and expenses	150,810	143,567
Income before income taxes	614	20,728
Provision for income taxes	94	643
Net income	520	20,085
General partner interest in net income	14	4,209
Common units interest in net income	$ 506	$ 15,876
Weighted average common units outstanding used in income (loss) per common unit:
Basic (in units)	59,740	55,678
Diluted (in units)	59,740	55,678
Income per common unit:
Basic (in dollars per unit)	$ 0.01	$ 0.28
Diluted (in dollars per unit)	0.01	0.28
Distributions declared and paid per limited partner unit in respective periods (in dollars per unit)	$ 0.5725	$ 0.5575

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 520	$ 20,085
Other comprehensive income (loss):
Interest rate swap loss, net of reclassifications to earnings	(4,896)	(5,554)
Amortization of terminated interest rate swaps	0	826
Total other comprehensive loss	(4,896)	(4,728)
Comprehensive income (loss)	$ (4,376)	$ 15,357

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (Unaudited) - USD ($) $ in Thousands	Total	Treasury Units	Accumulated Other Comprehensive Loss	Partners' Capital Common Units	Partners' Capital General Partner Units
Beginning balance at Dec. 31, 2014	$ 683,341	$ (1,477)	$ (3,438)	$ 668,714	$ 19,542
Beginning balance (in units) at Dec. 31, 2014		61,665		55,724,022	1,129,221
Increase (Decrease) in Partners' Capital
Issuance of common units for vesting of phantom units (in units)				50,717
Treasury units purchased	(258)	$ (258)
Treasury units purchased (in units)		(10,376)
Distribution of capital, net	(3,205)			$ (2,911)	$ (294)
Excess of purchase price of equipment over Archrock’s cost of equipment	(4,469)			(4,226)	(243)
Cash distributions	(35,323)			(31,083)	(4,240)
Unit-based compensation expense	592			592
Comprehensive income (loss)	15,357		(4,728)	15,876	4,209
Ending balance at Mar. 31, 2015	656,035	$ (1,735)	(8,166)	$ 646,962	$ 18,974
Ending balance (in units) at Mar. 31, 2015		72,041		55,774,739	1,129,221
Beginning balance at Dec. 31, 2015	547,996	$ (1,794)	(5,558)	$ 538,197	$ 17,151
Beginning balance (in units) at Dec. 31, 2015		74,888		59,796,514	1,209,562
Increase (Decrease) in Partners' Capital
Issuance of common units for vesting of phantom units (in units)				68,548
Treasury units purchased	(89)	$ (89)
Treasury units purchased (in units)		(11,356)
March 2016 Acquisition	1,836			$ 1,799	$ 37
March 2016 Acquisitions (in units)				257,000	5,205
Distribution of capital, net	1,483			$ 1,438	$ 45
Cash distributions	(39,680)			(34,235)	(5,445)
Unit-based compensation expense	199			199
Comprehensive income (loss)	(4,376)		(4,896)	506	14
Ending balance at Mar. 31, 2016	$ 507,369	$ (1,883)	$ (10,454)	$ 507,904	$ 11,802
Ending balance (in units) at Mar. 31, 2016		86,244		60,122,062	1,214,767

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 520	$ 20,085
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	39,237	36,105
Long-lived asset impairment	6,315	3,484
Amortization of deferred financing costs	909	1,030
Amortization of debt discount	304	286
Amortization of terminated interest rate swaps	0	826
Interest rate swaps	323	(136)
Unit-based compensation expense	199	592
Provision for doubtful accounts	1,025	390
(Gain) loss on sale of property, plant and equipment	53	(280)
Loss on non-cash consideration in March 2016 Acquisition	635	0
Changes in assets and liabilities, net of acquisitions:
Accounts receivable, trade	3,279	3,644
Other assets and liabilities	13,204	12,042
Net cash provided by operating activities	66,003	78,068
Cash flows from investing activities:
Capital expenditures	(22,542)	(68,239)
Payment for March 2016 Acquisition	(13,779)	0
Proceeds from sale of property, plant and equipment	149	4,624
Increase in amounts due from affiliates, net	(526)	(18,477)
Proceeds from the sale of general partner units	37	0
Net cash used in investing activities	(36,661)	(82,092)
Cash flows from financing activities:
Proceeds from borrowings of long-term debt	66,000	140,000
Repayments of long-term debt	(48,500)	(98,000)
Distributions to unitholders	(39,680)	(35,323)
Payments for debt issuance costs	0	(1,311)
Payments for settlement of interest rate swaps that include financing elements	(812)	(942)
Purchases of treasury units	(89)	(258)
Decrease in amounts due to affiliates, net	(5,980)	0
Net cash provided by (used in) financing activities	(29,061)	4,166
Net increase in cash and cash equivalents	281	142
Cash and cash equivalents at beginning of period	472	295
Cash and cash equivalents at end of period	753	437
Supplemental disclosure of non-cash transactions:
Non-cash capital contribution from limited and general partner	567	2,204
Contract operations equipment acquired/exchanged, net	915	(5,409)
Common units issued in March 2016 Acquisition	1,799	0
Non-cash consideration in March 2016 Acquisition	$ 3,165	$ 0

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Organization and Summary of Significant Accounting Policies	1. Organization and Summary of Significant Accounting Policies The accompanying unaudited condensed consolidated financial statements of Archrock Partners, L.P. (“we,” “our,” “us,” or the “Partnership”) included herein have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S.”) (“GAAP”) for interim financial information and the rules and regulations of the Securities and Exchange Commission. 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, that 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 Annual Report on Form 10-K for the year ended December 31, 2015 . That report contains a more comprehensive summary of our accounting policies. The interim results reported herein are not necessarily indicative of results for a full year. Organization Archrock General Partner, L.P. is our general partner and an indirect wholly-owned subsidiary of Archrock, Inc. (individually, and together with its wholly-owned subsidiaries, “Archrock”). As Archrock General Partner, L.P. is a limited partnership, its general partner, Archrock GP LLC, conducts our business and operations, and the board of directors and officers of Archrock GP LLC, which we refer to herein as our board of directors and our officers, make decisions on our behalf. On November 3, 2015, Exterran Holdings, Inc. completed the spin-off (the “Spin-off”) of its international contract operations, international aftermarket services and global fabrication businesses into a standalone public company operating as Exterran Corporation (“Exterran”). To effect the Spin-off, Exterran Holdings, Inc. distributed on a pro rata basis, all of the shares of Exterran common stock to the stockholders of Exterran Holdings, Inc. as of October 27, 2015. Upon the completion of the Spin-off, Exterran Holdings, Inc. was renamed “Archrock, Inc.” and, on November 4, 2015, the ticker symbol for Archrock’s common stock on the New York Stock Exchange was changed to “AROC.” Archrock continues to hold interests in us, which include the sole general partner interest and certain limited partner interests, as well as all of the incentive distribution rights. Effective on November 3, 2015, we were renamed “Archrock Partners, L.P.” and, on November 4, 2015, the ticker symbol for our common units on the Nasdaq Global Select Market was changed to “APLP.” Comprehensive Income (Loss) Components of comprehensive income (loss) are net income (loss) and all changes in equity during a period except those resulting from transactions with our limited partners or general partner. Our accumulated other comprehensive income (loss) consists only of derivative financial instruments. Changes in accumulated other comprehensive income (loss) represent changes in the fair value of derivative financial instruments that are designated as cash flow hedges to the extent the hedge is effective and amortization of terminated interest rate swaps. See Note 8 (“Accounting for Derivatives”) for additional disclosures related to comprehensive income (loss). Financial Instruments Our financial instruments consist of cash, trade receivables, interest rate swaps and debt. At March 31, 2016 and December 31, 2015 , the estimated fair values of these financial instruments approximated their carrying amounts as reflected in our condensed consolidated balance sheets. The fair value of our fixed rate debt was estimated based on quoted market yields in inactive markets, which are Level 2 inputs. The fair value of our floating rate debt 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. See Note 9 (“Fair Value Measurements”) for additional information regarding the fair value hierarchy. The following table summarizes the carrying amount and fair value of our debt as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Carrying Amount (1) Fair Value Carrying Amount (1) Fair Value Fixed rate debt $ 681,250 $ 518,000 $ 680,484 $ 524,000 Floating rate debt 747,460 749,000 729,898 731,000 Total debt $ 1,428,710 $ 1,267,000 $ 1,410,382 $ 1,255,000 (1) Carrying values are shown net of unamortized debt discounts and unamortized deferred financing costs. See Note 5 (“Long-Term Debt”) for further details. GAAP requires that all derivative instruments (including certain derivative instruments embedded in other contracts) be recognized in the balance sheet at fair value and that changes in such fair values be recognized in income (loss) unless specific hedging criteria are met. Changes in the values of derivatives that meet these hedging criteria will ultimately offset related income effects of the hedged item pending recognition in income. Goodwill Beginning in late 2014 and extending throughout 2015, the energy markets experienced a significant reduction in oil and natural gas prices which has had a significant impact on the financial performance and operating results of many oil and natural gas companies. Such declines accelerated in the fourth quarter of 2015, resulting in higher borrowing costs for companies and a substantial reduction in forecasted capital spending across the energy industry leading to lower projected growth rates over the short-term. Such declines impacted our future cash flow forecasts, our market capitalization, and the market capitalization of peer companies. We identified these conditions as a triggering event, which required us to perform a two-step goodwill impairment test as of December 31, 2015. Accordingly, we recorded a preliminary full impairment of our goodwill in the fourth quarter of 2015 of $127.8 million . During the first quarter of 2016, we finalized the impairment analysis which did not result in an adjustment to the preliminary impairment booked in the fourth quarter of 2015. Income Per Common Unit Income per common unit is computed using the two-class method. Under the two-class method, basic income per common unit is determined by dividing net income allocated to the common units after deducting the amounts allocated to our general partner (including distributions to our general partner on its incentive distribution rights) and participating securities, by the weighted average number of outstanding common units (also referred to as limited partner units) during the period. Participating securities include unvested phantom units with nonforfeitable tandem distribution equivalent rights to receive cash distributions in the quarter in which distributions are paid on common units. 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. When computing income per common unit in periods when distributions are greater than income, the amount of the actual incentive distribution rights, if any, is deducted from net income and allocated to our general partner for the corresponding period. The remaining amount of net income, after deducting distributions to participating securities, is allocated between the general partner and common units based on how our partnership agreement allocates net losses. When computing income per common unit in periods when income is greater than distributions, income is allocated to the general partner, participating securities and common units based on how our partnership agreement would allocate income if the full amount of income for the period had been distributed. This allocation of net income does not impact our total net income, consolidated results of operations or total cash distributions (including actual incentive distribution rights); however, it may result in our general partner being allocated additional incentive distributions for purposes of our income per unit calculation, which could reduce net income per common unit. However, as required by our partnership agreement, we determine cash distributions based on available cash and determine the actual incentive distributions allocable to our general partner based on actual distributions. The following table reconciles net income used in the calculation of basic and diluted income per common unit (in thousands): Three Months Ended March 31, 2016 2015 Net income $ 520 $ 20,085 Less: General partner incentive distribution rights (4 ) (3,887 ) Less: General partner 2% ownership interest (10 ) (322 ) Common units interest in net income 506 15,876 Less: Net income attributable to participating securities (57 ) (48 ) Net income used in basic and diluted income per common unit $ 449 $ 15,828 The following table shows the potential common units that were included in computing diluted income per common unit (in thousands): Three Months Ended March 31, 2016 2015 Weighted average common units outstanding including participating securities 59,827 55,739 Less: Weighted average participating securities outstanding (87 ) (61 ) Weighted average common units outstanding — used in basic income per common unit 59,740 55,678 Net dilutive potential common units issuable: Phantom units — — Weighted average common units and dilutive potential common units — used in diluted income per common unit 59,740 55,678

Recent Accounting Developments

Recent Accounting Developments	3 Months Ended
	Mar. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recent Accounting Developments	Accounting Standards Updates Implemented In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2015-06 (“Update 2015-06”) that addresses the historical earnings per unit presentation for master limited partnerships that apply the two-class method of calculating earnings per unit when a drop-down transaction occurs between entities under common control. Update 2015-06 specifies that the historical earnings (losses) of a transferred business before the date of a dropdown transaction should be allocated entirely to the general partner and the previously reported earnings per unit of the limited partners should not change as a result of the dropdown transaction. Update 2015-06 was effective for reporting periods beginning after December 15, 2015 and is required to be applied retrospectively. As discussed in Note 3 (“Business Acquisitions”) , due to the impracticability of significant assumptions required to retroactively adjust historical financial statements upon the consummation of a dropdown, our financial statements have presented the assets acquired, liabilities assumed, revenue and direct operating expenses associated with the April 2015 Contract Operations Acquisition beginning on the date of such acquisition. We adopted Update 2015-06 in the first quarter of 2016 which had no impact on our consolidated financial statements. In April 2015, the FASB issued Accounting Standards Update 2015-03 (“Update 2015-03”) that addresses the presentation of debt issuance costs. Update 2015-03 requires an entity to present such costs in the balance sheet as a direct deduction from the carrying amount of the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. In August 2015, the FASB issued Accounting Standards Update 2015-15 (“Update 2015-15”) which clarifies that the guidance in Update 2015-03 does not apply to line-of-credit arrangements. Per Update 2015-15, line-of-credit arrangements will continue to defer and present debt issuance costs as an asset and subsequently amortize the deferred debt costs ratably over the term of the arrangement. Upon transition, an entity is required to comply with the applicable disclosures for a change in an accounting principle. Update 2015-03 was effective for reporting periods beginning after December 15, 2015 on a retrospective basis. We adopted Update 2015-03 in the first quarter of 2016, which resulted in the reclassification of an $11.6 million asset previously presented in intangibles and other assets, net on the condensed consolidated balance sheet to a contra-liability presented in long-term debt on the condensed consolidated balance sheet as of December 31, 2015. See Note 5 (“Long-Term Debt”) for further details. Accounting Standards Updates Not Yet Implemented In March 2016, the FASB issued Accounting Standards Update No. 2016-09 (“Update 2016-09”) that simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either debt or equity liabilities, and classification on the statement of cash flows. For public entities, Update 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of Update 2016-09 on our consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 (“Update 2016-02”) that establishes a right-of-use model that requires a lessee to record a right-of-use 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. Update 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. We are currently evaluating the impact of Update 2016-02 on our consolidated financial statements. In May 2014, the FASB issued Accounting Standards Update No. 2014-09 (“Update 2014-09”) that outlines a single comprehensive model for companies to use in accounting for revenue arising from contracts with customers and supersedes the most current revenue recognition guidance, including industry-specific guidance. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Update 2014-09 also requires disclosures enabling users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Update 2014-09 will be effective for reporting periods beginning after December 15, 2017, including interim periods within the reporting period. Early adoption is permitted for reporting periods beginning after December 15, 2016. Companies may use either a full retrospective or a modified retrospective approach. In March 2016, the FASB issued Accounting Standards Update No. 2016-08 (“Update 2016-08”), which clarifies the guidance in Update 2014-09 by providing guidance on recording revenue on a gross basis versus a net basis based on the determination of whether an entity is a principal or an agent when another party is involved in providing goods or services to a customer. Update 2016-08 has the same effective date as the original standard. We are currently evaluating the potential impact of Update 2014-09 and Update 2016-08 on our consolidated financial statements.

Business Acquisitions

Business Acquisitions	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Business Acquisitions	3. Business Acquisitions March 2016 Acquisition On March 1, 2016, we completed an acquisition of contract operations customer service agreements with four customers and a fleet of 19 compressor units used to provide compression services under those agreements comprising approximately 23,000 horsepower. The $18.8 million purchase price was funded with $13.8 million in borrowings under our revolving credit facility, a non-cash exchange of 24 compressor units for $3.2 million , and the issuance of 257,000 common units for $1.8 million . In connection with this acquisition, we issued and sold 5,205 general partner units to our general partner so it could maintain its approximate 2% general partner interest in us. This acquisition is referred to as the “March 2016 Acquisition.” During the three months ended March 31, 2016, we incurred transaction costs of approximately $0.2 million related to the March 2016 Acquisition, which is reflected in other (income) expense, net, in our condensed consolidated statement of operations. We accounted for the March 2016 Acquisition using the acquisition method, which requires, among other things, assets acquired to be recorded at their fair value on the acquisition date. The following table summarizes the purchase price allocation based on estimated fair values of the acquired assets as of the acquisition date (in thousands): Fair Value Property, plant and equipment $ 14,929 Intangible assets 3,839 Purchase price $ 18,768 Property, Plant and Equipment and Intangible Assets Acquired Property, plant and equipment is comprised of compressor units that will be depreciated on a straight-line basis over an estimated average remaining useful life of 15 years . The amount of finite life intangible assets, and their associated average useful lives, was determined based on the period which the assets are expected to contribute directly or indirectly to our future cash flows, and consisted of the following: Amount (in thousands) Average Useful Life Customer related $ 3,839 2.3 years The results of operations attributable to the assets acquired in the March 2016 Acquisition have been included in our condensed consolidated financial statements since the date of acquisition. Pro forma financial information is not presented for the March 2016 Acquisition as it is immaterial to our reported results. April 2015 Contract Operations Acquisition On April 17, 2015, we acquired from Archrock contract operations customer service agreements with 60 customers and a fleet of 238 compressor units used to provide compression services under those agreements, comprising approximately 148,000 horsepower, or 3% (by then available horsepower) of the combined contract operations business of Archrock and us (the “April 2015 Contract Operations Acquisition”). The acquired assets also included 179 compressor units, comprising approximately 66,000 horsepower, previously leased from Archrock to us. At the acquisition date, the acquired fleet assets had a net book value of $108.8 million , net of accumulated depreciation of $59.9 million . Total consideration for the transaction was approximately $102.3 million , excluding transaction costs. In connection with this acquisition, we issued approximately 4.0 million common units to Archrock and approximately 80,000 general partner units to our general partner. Based on the terms of the contribution, conveyance and assumption agreement, the common units and general partner units, including incentive distribution rights, we issued for this acquisition were not entitled to receive a cash distribution relating to the quarter ended March 31, 2015. In connection with this acquisition, we were allocated $1.1 million finite life intangible assets associated with customer relationships of Archrock’s contract operations segment. The amounts allocated were based on the ratio of fair value of the net assets transferred to us to the total fair value of Archrock’s contract operations segment. These intangible assets are being amortized through 2024, based on the present value of income expected to be realized from these intangible assets. An acquisition of a business from an entity under common control is generally accounted for under GAAP by the acquirer with retroactive application as if the acquisition date was the beginning of the earliest period included in the financial statements. Retroactive effect to the April 2015 Contract Operations Acquisition was impracticable because such retroactive application would have required significant assumptions in a prior period that cannot be substantiated. Accordingly, our financial statements include the assets acquired, liabilities assumed, revenue and direct operating expenses associated with the acquisition beginning on the date of such acquisition. However, the preparation of pro forma financial information allows for certain assumptions that do not meet the standards of financial statements prepared in accordance with GAAP. Pro Forma Financial Information Pro forma financial information for the three months ended March 31, 2015 has been included to give effect to the additional assets acquired in the April 2015 Contract Operations Acquisition. The April 2015 Contract Operations Acquisition is presented in the pro forma financial information as though this transaction occurred as of January 1, 2015 . The pro forma financial information reflects the following transactions related to the April 2015 Contract Operations Acquisition: • our acquisition in April 2015 of certain contract operations customer service agreements, compression equipment and identifiable intangible assets from Archrock; and • our issuance of approximately 4.0 million common units to Archrock and approximately 80,000 general partner units to our general partner. The pro forma financial information below is presented for informational purposes only and is not necessarily indicative of our results of operations that would have occurred had the transaction been consummated at the beginning of the period presented, nor is it necessarily indicative of future results. The pro forma financial information below was derived by adjusting our historical financial statements. The following table shows pro forma financial information for the three months ended March 31, 2015 (in thousands, except per unit amounts): Three Months Ended Revenue $ 172,062 Net income $ 20,516 Basic income per common unit $ 0.27 Diluted income per common unit $ 0.27 Pro forma net income per common unit is determined by dividing the pro forma net income that would have been allocated to our common unitholders by the weighted average number of common units outstanding after the completion of the transactions included in the pro forma financial information. Pursuant to our partnership agreement, to the extent that the quarterly distributions exceed certain targets, our general partner is entitled to receive certain incentive distributions that will result in more net income proportionately being allocated to our general partner than to our common unitholders. The pro forma net income per limited partner unit calculations reflect the incentive distributions made to our general partner and a reduction of net income allocable to our limited partners of $0.3 million for the three months ended March 31, 2015 , which reflects the amount of additional incentive distributions that would have occurred if the pro forma limited partner units had been outstanding as of January 1, 2015 .

Related Party Transactions

Related Party Transactions	3 Months Ended
	Mar. 31, 2016
Related Party Transactions [Abstract]
Related Party Transactions	4. Related Party Transactions We are a party to an omnibus agreement with Archrock, our general partner and others (as amended and/or restated, the “Omnibus Agreement”), which includes, among other things: • certain agreements not to compete between Archrock and its affiliates, on the one hand, and us and our affiliates, on the other hand; • Archrock’s obligation to provide all operational staff, corporate staff and support services reasonably necessary to operate our business and our obligation to reimburse Archrock for such services; • the terms under which we, Archrock, and our respective affiliates may transfer, exchange or lease compression equipment among one another; • Archrock’s grant to us of a license to use certain intellectual property, including our logo; and • Archrock’s and our obligations to indemnify each other for certain liabilities. The Omnibus Agreement will terminate upon a change of control of Archrock GP LLC, our general partner or us, and certain provisions of the Omnibus Agreement will terminate upon a change of control of Archrock. Purchase of New Compression Equipment from Archrock Prior to the amendment and restatement of our Omnibus Agreement, in November 2015 in connection with the Spin-off, we were able to purchase newly-fabricated compression equipment from Archrock or its affiliates at Archrock’s cost to fabricate such equipment plus a fixed margin. During the three months ended March 31, 2015 , we purchased $55.8 million of newly-fabricated compression equipment from Archrock. Transactions between us and Archrock and its affiliates are transactions between entities under common control. Under GAAP, transfers of assets and liabilities between entities under common control are to be initially recorded on the books of the receiving entity at the carrying value of the transferor. Any difference between consideration given and the carrying value of the assets or liabilities is treated as a capital distribution or contribution. As a result, the newly-fabricated compression equipment purchased during the three months ended March 31, 2015 was recorded in our condensed consolidated balance sheets as property, plant and equipment of $51.3 million , which represents the carrying value of Archrock’s affiliates that sold it to us, and as a distribution of equity of $4.5 million , which represents the fixed margin we paid above the carrying value in accordance with the Omnibus Agreement. During the three months ended March 31, 2016 and 2015 , Archrock contributed to us $0.6 million and $2.2 million , respectively, primarily related to the completion of overhauls on compression equipment that was exchanged with us or contributed to us and where overhauls were in progress on the date of exchange or contribution. In connection with the Spin-off, Archrock contributed its fabrication business to Exterran and we entered into a separate supply agreement with Exterran under which we are obligated to purchase our requirements of newly-fabricated compression equipment from Exterran and its affiliates, subject to certain exceptions. For the three months ended March 31, 2016 , we purchased $10.7 million of newly-manufactured compression equipment from Exterran. Transfer, Exchange or Lease of Compression Equipment with Archrock If Archrock determines in good faith that we or Archrock’s contract operations services business need to transfer, exchange or lease compression equipment between Archrock and us, the Omnibus Agreement permits such equipment to be transferred, exchanged or leased if it will not cause us to breach any existing contracts, suffer a loss of revenue under an existing compression services contract or incur any unreimbursed costs. In consideration for such transfer, exchange or lease of compression equipment, the transferee will either (1) transfer to the transferor compression equipment equal in value to the appraised value of the compression equipment transferred to it, (2) agree to lease such compression equipment from the transferor or (3) pay the transferor an amount in cash equal to the appraised value of the compression equipment transferred to it. During the three months ended March 31, 2016 , pursuant to the terms of the Omnibus Agreement, we transferred ownership of 115 compressor units, totaling approximately 48,500 horsepower with a net book value of approximately $22.9 million , to Archrock. In exchange, Archrock transferred ownership of 103 compressor units, totaling approximately 40,000 horsepower with a net book value of approximately $23.8 million , to us. During the three months ended March 31, 2015 , pursuant to the terms of the Omnibus Agreement, we transferred ownership of 127 compressor units, totaling approximately 47,800 horsepower with a net book value of approximately $23.3 million , to Archrock. In exchange, Archrock transferred ownership of 107 compressor units, totaling approximately 40,000 horsepower with a net book value of approximately $17.9 million , to us. During the three months ended March 31, 2016 , we recorded capital contributions of approximately $0.9 million related to the differences in net book value on the exchanged compression equipment. During the three months ended March 31, 2015 , we recorded capital distributions of approximately $5.4 million related to the differences in net book value on the exchanged compression equipment. No customer contracts were included in the transfers. Under the terms of the Omnibus Agreement, such transfers must be of equal appraised value, as defined in the Omnibus Agreement, with any difference being settled in cash. At March 31, 2016 , we had equipment on lease to Archrock with an aggregate cost and accumulated depreciation of $42,000 and $24,000 , respectively. At December 31, 2015 , we had equipment on lease to Archrock with an aggregate cost and accumulated depreciation of $10.1 million and $3.3 million , respectively. During each of the three month periods ended March 31, 2016 and 2015 , we had revenue of $0.1 million from Archrock related to the lease of our compression equipment. During the three months ended March 31, 2016 and 2015 , we had cost of sales of $0.1 million and $1.1 million , respectively, with Archrock related to the lease of Archrock’s compression equipment. Reimbursement of Operating and SG&A Expense Archrock provides all operational staff, corporate staff and support services reasonably necessary to run our business. These services may include, without limitation, operations, marketing, maintenance and repair, periodic overhauls of compression equipment, inventory management, legal, accounting, treasury, insurance administration and claims processing, risk management, health, safety and environmental, information technology, human resources, credit, payroll, internal audit, taxes, facilities management, investor relations, enterprise resource planning system, training, executive, sales, business development and engineering. Archrock charges us for costs that are directly attributable to us. Costs that are indirectly attributable to us and Archrock’s other operations are allocated among Archrock’s other operations and us. The allocation methodologies vary based on the nature of the charge and have historically included, among other things, revenue, headcount and horsepower. We believe that the allocation methodologies used to allocate indirect costs to us are reasonable.

Long-Term Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Long-Term Debt	5. Long-Term Debt Long-term debt consisted of the following (in thousands): March 31, 2016 December 31, 2015 Revolving credit facility due May 2018 $ 598,000 $ 580,500 Term loan facility due May 2018 150,000 150,000 Less: Deferred financing costs, net of amortization (540 ) (602 ) 149,460 149,398 6% senior notes due April 2021 350,000 350,000 Less: Debt discount, net of amortization (3,704 ) (3,862 ) Less: Deferred financing costs, net of amortization (5,139 ) (5,396 ) 341,157 340,742 6% senior notes due October 2022 350,000 350,000 Less: Debt discount, net of amortization (4,526 ) (4,673 ) Less: Deferred financing costs, net of amortization (5,381 ) (5,585 ) 340,093 339,742 Long-term debt $ 1,428,710 $ 1,410,382 Revolving Credit Facility and Term Loan In February 2015, we amended our senior secured credit agreement (the “Credit Agreement”), which among other things, increased the borrowing capacity under the revolving credit facility by $250.0 million to $900.0 million . The Credit Agreement, which matures in May 2018, also includes a $150.0 million term loan facility. During the three months ended March 31, 2015 , we incurred transaction costs of $1.3 million related to the amendment of our Credit Agreement. These costs were included in intangible and other assets, net, and are being amortized to interest expense over the term of the facility. As of March 31, 2016 , we had undrawn and available capacity of $302.0 million under our revolving credit facility. Effective May 2, 2016, we amended our Credit Agreement to, among other things, decrease the borrowing capacity under the revolving credit facility by $75.0 million to $825.0 million . Prior to this amendment, we were able to increase the aggregate commitments under the Credit Agreement by up to an additional $50 million subject to certain conditions, including the approval of the lenders. As a result of this amendment and subject to certain conditions, including the approval of the lenders, we are able to increase the aggregate commitments under the Credit Agreement by up to an additional $125 million . The Credit Agreement contains various covenants with which we must comply, including, but not limited to, restrictions on the use of proceeds from borrowings and limitations on our ability to incur additional indebtedness, engage in transactions with affiliates, merge or consolidate, sell assets, make certain investments and acquisitions, make loans, grant liens, repurchase equity and pay dividends and distributions. The Credit Agreement also contains various covenants, which have been amended effective March 31, 2016, requiring mandatory prepayments from the net cash proceeds of certain asset transfers. In addition, if as of any date we have cash and cash equivalents (other than proceeds from a debt or equity issuance in the 30 days prior to such date reasonably expected to be used to fund an acquisition permitted under the Credit Agreement) in excess of $50.0 million , then such excess amount will be used to pay down outstanding borrowings of a corresponding amount under the revolving credit facility. We must maintain various consolidated financial ratios, including a ratio of EBITDA (as defined in the Credit Agreement) to Total Interest Expense (as defined in the Credit Agreement) of not less than 2.75 to 1.0, a ratio of Total Debt (as defined in the Credit Agreement) to EBITDA of not greater than 5.95 to 1.0 through the fourth quarter of 2017, 5.75 to 1.0 in the first quarter of 2018, and 5.25 to 1.0 (subject to a temporary increase to 5.5 to 1.0 for any quarter during which an acquisition meeting certain thresholds is completed and for the following two quarters after the acquisition closes) thereafter and a ratio of Senior Secured Debt (as defined in the Credit Agreement) to EBITDA of not greater than 3.50 to 1.0 through the fourth quarter of 2017, 3.75 to 1.0 in the first quarter of 2018 and 4.0 to 1.0 thereafter. A material adverse effect on our assets, liabilities, financial condition, business or operations that, taken as a whole, impacts our ability to perform our obligations under the Credit Agreement could lead to a default under that agreement. As of March 31, 2016 , we were in compliance with all financial covenants under the Credit Agreement. 6% Senior Notes Due April 2021 and 6% Senior Notes Due October 2022 In March 2013, we issued $350.0 million aggregate principal amount of 6% senior notes due April 2021 (the “2013 Notes”). In April 2014, we issued $350.0 million aggregate principal amount of 6% senior notes due October 2022 (the “2014 Notes”).The 2013 Notes and the 2014 Notes are guaranteed on a senior unsecured basis by all of our existing subsidiaries (other than Archrock Partners Finance Corp., which is a co-issuer of the 2013 Notes and the 2014 Notes) and certain of our future subsidiaries. The 2013 Notes and the 2014 Notes and the guarantees, respectively, are our and the guarantors’ general unsecured senior obligations, rank equally in right of payment with all of our and the guarantors’ other senior obligations, and are effectively subordinated to all of our and the guarantors’ existing and future secured debt to the extent of the value of the collateral securing such indebtedness. In addition, the 2013 Notes and the 2014 Notes and guarantees are effectively subordinated to all existing and future indebtedness and other liabilities of any future non-guarantor subsidiaries. All of our subsidiaries are 100% owned, directly or indirectly, by us and guarantees by our subsidiaries are full and unconditional (subject to customary release provisions which are discussed in our Annual Report on Form 10-K for the year ended December 31, 2015) and constitute joint and several obligations. We have no assets or operations independent of our subsidiaries, and there are no significant restrictions upon our subsidiaries’ ability to distribute funds to us. Archrock Partners Finance Corp. has no operations and does not have revenue other than as may be incidental as co-issuer of the 2013 Notes and the 2014 Notes. Because we have no independent operations, the guarantees are full and unconditional (subject to customary release provisions) and constitute joint and several obligations of our subsidiaries other than Archrock Partners Finance Corp., and as a result we have not included consolidated financial information of our subsidiaries.

Cash Distributions

Cash Distributions	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Cash Distributions	6. Cash Distributions We make distributions of available cash (as defined in our partnership agreement) from operating surplus in the following manner: • first , 98% to common unitholders, pro rata, and 2% to our general partner, until each unit has received a distribution of $0.4025 ; • second , 85% to all common unitholders, pro rata, and 15% to our general partner, until each unit has received a distribution of $0.4375 ; • third , 75% to all common unitholders, pro rata, and 25% to our general partner, until each unit has received a total of $0.5250 ; and • thereafter , 50% to all common unitholders, pro rata, and 50% to our general partner. The following table summarizes our distributions per unit for 2015 : Period Covering Payment Date Distribution per Limited Partner Unit Total Distribution (1) 1/1/2015 — 3/31/2015 May 15, 2015 $ 0.5625 $ 35.9 million 4/1/2015 — 6/30/2015 August 14, 2015 0.5675 39.1 million 7/1/2015 — 9/30/2015 November 13, 2015 0.5725 39.7 million 10/1/2015 — 12/31/2015 February 12, 2016 0.5725 39.7 million (1) Includes distributions to our general partner on its incentive distribution rights. On May 2, 2016 , our board of directors approved a cash distribution of $0.2850 per limited partner unit, or approximately $17.5 million , including distributions to our general partner on its incentive distribution rights. The distribution covers the period from January 1, 2016 through March 31, 2016 . The record date for this distribution is May 12, 2016 and payment is expected to occur on May 13, 2016 .

Unit-Based Compensation

Unit-Based Compensation	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Unit-Based Compensation	7. Unit-Based Compensation Long-Term Incentive Plan Our board of directors adopted the Archrock Partners, L.P. Long-Term Incentive Plan (the “Plan”) in October 2006 for the benefit of the employees, directors and consultants of us, Archrock and our respective affiliates. A maximum of 1,035,378 common units are available for the issuance of common unit options, restricted units, unit awards and phantom units under the Plan. The Plan is administered by the compensation committee of our board of directors (the “Plan Administrator”). Phantom units are notional units that entitle the grantee to receive common units upon the vesting of such phantom units or, at the discretion of the Plan Administrator, cash equal to the fair market value of the underlying common units. Phantom units granted under the Plan 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 vest one-third per year on each of the first three anniversaries of the grant date. Phantom Units The following table presents phantom unit activity during the three months ended March 31, 2016 : Phantom Units Weighted Average Grant-Date Fair Value per Unit Phantom units outstanding, January 1, 2016 77,173 $ 27.01 Granted 189,945 7.84 Vested (68,548 ) 18.59 Phantom units outstanding, March 31, 2016 198,570 11.58 As of March 31, 2016 , we expect $2.1 million of unrecognized compensation cost related to unvested phantom units to be recognized over the weighted-average period of 2.7 years .

Accounting for Derivatives

Accounting for Derivatives	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Accounting for Derivatives	8. Accounting for Derivatives We are exposed to market risks associated with changes in interest rates. We use derivative financial instruments to minimize the risks and/or costs associated with financial activities by managing our exposure to interest rate fluctuations on a portion of our debt obligations. We do not use derivative financial instruments for trading or other speculative purposes. Interest Rate Risk At March 31, 2016 , we were 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: Expiration Date Notional Value (in millions) May 2018 $ 300 May 2019 100 May 2020 100 $ 500 As of March 31, 2016 , the weighted average effective fixed interest rate on our interest rate swaps was 1.6% . We have designated these interest rate swaps as cash flow hedging instruments so that any change in their fair values is recognized as a component of comprehensive income (loss) and is included in accumulated other comprehensive income (loss) to the extent the hedge is effective. As the swap terms substantially coincide with the hedged item and are expected to offset changes in expected cash flows due to fluctuations in the variable rate, we currently do not expect a significant amount of ineffectiveness on these hedges. We perform quarterly calculations to determine whether the swap agreements are still effective and to calculate any ineffectiveness. We recorded an immaterial amount of interest expense during three months ended March 31, 2016 as compared to $0.3 million of interest income during the three months ended March 31, 2015 due to ineffectiveness related to interest rate swaps. We estimate that $4.0 million of deferred losses attributable to interest rate swaps and included in our accumulated other comprehensive income (loss) at March 31, 2016 , will be reclassified into earnings as interest expense at then-current values during the next twelve months as the underlying hedged transactions occur. 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 in our condensed consolidated statements of cash flows. The following tables present the effect of derivative instruments on our consolidated financial position and results of operations (in thousands): March 31, 2016 December 31, 2015 Balance Sheet Location Fair Value Asset (Liability) Fair Value Asset (Liability) Derivatives designated as hedging instruments: Interest rate swaps Intangible and other assets, net $ — $ 45 Interest rate swaps Current portion of interest rate swaps (4,949 ) (4,608 ) Interest rate swaps Other long-term liabilities (5,470 ) (1,421 ) Total derivatives $ (10,419 ) $ (5,984 ) Loss Recognized in Other Comprehensive Income (Loss) on Derivatives Location of Loss Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss) Loss Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss) Derivatives designated as cash flow hedges: Interest rate swaps Three months ended March 31, 2016 $ (5,932 ) Interest expense $ (1,036 ) Three months ended March 31, 2015 (6,253 ) Interest expense (1,525 ) The counterparties to our derivative agreements are major international financial institutions. We monitor the credit quality of these financial institutions and do not expect non-performance by any counterparty, although such non-performance could have a material adverse effect on us. We have no specific collateral posted for our derivative instruments. The counterparties to our interest rate swaps are also lenders under our senior secured credit facility and, in that capacity, share proportionally in the collateral pledged under the related facility.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	9. Fair Value Measurements The accounting standard for fair value measurements and disclosures establishes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into the following three broad 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. The following table presents our assets and liabilities measured at fair value on a recurring basis as of March 31, 2016 and December 31, 2015 , with pricing levels as of the date of valuation (in thousands): March 31, 2016 December 31, 2015 (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Interest rate swaps asset $ — $ — $ — $ — $ 45 $ — Interest rate swaps liability — (10,419 ) — — (6,029 ) — Our interest rate swaps are recorded at fair value utilizing a combination of the market approach and income approach to estimate fair value based on forward LIBOR curves. The following table presents our assets and liabilities measured at fair value on a nonrecurring basis as of March 31, 2016 and December 31, 2015 , with pricing levels as of the date of valuation (in thousands): March 31, 2016 December 31, 2015 (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Impaired long-lived assets $ — $ — $ 381 $ — $ — $ 2,789 Our estimate of the impaired long-lived assets’ fair value was primarily based on either 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 .

Restructuring Charges

Restructuring Charges	3 Months Ended
	Mar. 31, 2016
Restructuring and Related Activities [Abstract]
Restructuring Charges	11. Restructuring Charges In the first quarter of 2016, Archrock determined to undertake a cost reduction program to reduce its on-going operating expenses, including workforce reductions and closure of certain make ready shops. These actions were the result of Archrock’s review of its business and efforts to efficiently manage cost and maintain its business in line with current and expected activity levels and anticipated make ready demand in the U.S. market. During the three months ended March 31, 2016, we incurred $4.1 million of restructuring charges comprised of an allocation of expenses related to severance benefits and consulting fees associated with this cost reduction plan from Archrock to us pursuant to the terms of the Omnibus Agreement based on horsepower. These charges are reflected as restructuring charges in our condensed consolidated statements of operations.

Long-Lived Asset Impairment

Long-Lived Asset Impairment	3 Months Ended
	Mar. 31, 2016
Asset Impairment Charges [Abstract]
Long-Lived Asset Impairment	10. 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. During the three months ended March 31, 2016 , we reviewed the future deployment of our idle compression assets for units that were not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. Based on this review, we determined that approximately 60 idle compressor units totaling approximately 22,000 horsepower would be retired from the active fleet. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded a $6.3 million asset impairment to reduce the book value of each unit to its estimated fair value. The fair value of each unit was estimated based on either 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. During the three months ended March 31, 2015 , we reviewed the future deployment of our idle compression assets for units that were not of the type, configuration, condition, make or model that are cost efficient to maintain and operate. Based on this review, we determined that approximately 30 idle compressor units totaling approximately 11,000 horsepower would be retired from the active fleet. The retirement of these units from the active fleet triggered a review of these assets for impairment. As a result, we recorded a $3.5 million asset impairment to reduce the book value of each unit to its estimated fair value. The fair value of each unit was estimated based on either 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.

Unit Transactions

Unit Transactions	3 Months Ended
	Mar. 31, 2016
Partners' Capital [Abstract]
Unit Transactions	12. Unit Transactions On March 1, 2016, the Partnership completed the March 2016 Acquisition. A portion of the $18.8 million purchase price was funded through the issuance of 257,000 common units for $1.8 million . In connection with this acquisition, we issued and sold 5,205 general partner units to our general partner so it could maintain its approximate 2% general partner interest in us. As of March 31, 2016 , Archrock owned 23,582,056 common units and 1,214,767 general partner units, collectively representing approximately 40% interest in us.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	13. Commitments and Contingencies In 2011, the Texas Legislature enacted changes related to the appraisal of natural gas compressors for ad valorem tax purposes by expanding the definitions of “Heavy Equipment Dealer” and “Heavy Equipment” effective from the beginning of 2012 (the “Heavy Equipment Statutes”). Under the revised statutes, we believe we are a Heavy Equipment Dealer, that our natural gas compressors are Heavy Equipment and that we, therefore, are required to file our ad valorem tax renditions under this new methodology. We further believe that, under the Heavy Equipment Statutes, our natural gas compressors are taxable in the counties where we maintain a business location and keep natural gas compressors instead of where the compressors may be located on January 1 of a tax year. A large number of appraisal review boards denied our position, and we filed petitions for review in the appropriate district courts. As of March 31, 2016 , three of these cases have been decided. In each case, the district court held that the revised Heavy Equipment Statutes apply to natural gas compressors. However, in each case, the district court further held that the revised Heavy Equipment Statutes are unconstitutional as applied to natural gas compressors, and that the natural gas compressors of our wholly owned subsidiary Archrock Partners Leasing LLC, formerly known as EXLP Leasing LLC (“EXLP Leasing”), and Archrock’s subsidiary Archrock Services Leasing LLC, formerly known as EES Leasing LLC (“EES Leasing”), are taxable in the counties where they were located on January 1 of the tax year at issue, which is favorable to the county appraisal districts. We appealed all three of these decisions. On August 25, 2015, the Fourteenth Court of Appeals in Houston, Texas issued a ruling stating that EXLP Leasing’s and EES Leasing’s natural gas compressors are taxable in the counties where they were located on January 1 of the tax year at issue, and it remanded the case to the district court for further evidence on the issue of whether the Heavy Equipment Statutes are constitutional as applied to EXLP Leasing’s and EES Leasing’s compressors. On November 24, 2015, we filed a petition asking the Texas Supreme Court to review this decision. On March 21, 2016, the Galveston Central Appraisal District filed a response opposing our petition for review. We filed a reply, with the Texas Supreme Court, to the Galveston Central Appraisal District’s response on April 26, 2016. On September 23, 2015, the Eighth Court of Appeals in El Paso, Texas decided the other two appellate cases in our favor by affirming the district court’s ruling that the Heavy Equipment Statutes apply to natural gas compressors, and overturning the district court’s ruling that the Heavy Equipment Statutes are unconstitutional as applied to natural gas compressors. The Eighth Court of Appeals also ruled, however, that EXLP Leasing’s and EES Leasing’s natural gas compressors are taxable in the counties where they were located on January 1 of the tax year at issue. The Ward County Appraisal District and Loving County Appraisal District each filed a petition asking the Texas Supreme Court to review its respective Eighth Court of Appeals decision. On March 11, 2016, we filed responses to the appraisal districts’ petitions and cross-petitions for review in each case asking the Texas Supreme Court to also review the Eighth Court of Appeals’ determination that natural gas compressors are taxable in the counties where they were located on January 1 of the tax year at issue. In EES Leasing LLC and EXLP Leasing LLC v. Harris County Appraisal District, the parties filed motions for summary judgment, which are currently pending before the district court. In EES Leasing LLC v. Irion County Appraisal District, the court denied both parties’ respective motions for summary judgment concerning taxes assessed by Irion County for the 2012 tax year, and consolidated the case with EES Leasing’s 2013 tax year case, which also included EXLP Leasing as a party. On August 27, 2015, the Irion County district court abated the consolidated case, EES Leasing LLC and EXLP Leasing LLC v. Irion County Appraisal District , until the final resolution of the appellate cases considering the constitutionality of the Heavy Equipment Statutes, or further order of the court. As a result of the new methodology, our ad valorem tax expense (which is reflected in our condensed consolidated statements of operations as a component of cost of sales (excluding depreciation and amortization expense)) includes a benefit of $3.5 million during the three months ended March 31, 2016 . Since the change in methodology became effective in 2012, we have recorded an aggregate benefit of $38.8 million as of March 31, 2016 , of which approximately $8.0 million has been agreed to by a number of appraisal review boards and county appraisal districts and $30.8 million has been disputed and is currently in litigation. Recognizing the similarity of the issues and that these cases will ultimately be resolved by the Texas appellate courts, we have reached, or intend to reach, agreements with as many of the appraisal districts as possible to stay or abate any appeals that are pending in district court. If our appeals are ultimately unsuccessful, we would be required to pay ad valorem taxes up to the aggregate benefit we have recorded, and the additional ad valorem tax payments may also be subject to substantial penalties and interest. In addition, while we do not expect the ultimate determination of the issue of where the natural gas compressors are taxable under the Heavy Equipment Statutes would have an impact on the amount of taxes due, we could be subject to substantial penalties if we are unsuccessful on this issue. Also, if we are unsuccessful in our litigation with the appraisal districts, or if legislation is enacted in Texas that repeals or alters the Heavy Equipment Statutes such that in the future we do not qualify as a Heavy Equipment Dealer or our compressors do not qualify as Heavy Equipment, then we would likely be required to pay these ad valorem taxes under the old methodology going forward, which would increase our quarterly cost of sales expense up to approximately the amount of our then most recent quarterly benefit recorded. If this litigation is resolved against us in whole or in part, or if in the future we do not qualify as a Heavy Equipment Dealer or our compressors do not qualify as Heavy Equipment because of new or revised Texas statutes, we will incur additional taxes and could be subject to substantial penalties and interest, which would impact our future results of operations and cash flows, including our cash available for distribution. In the ordinary course of business, we are also involved in various other 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 other actions will not have a material adverse effect on our consolidated financial position, results of operations or cash flows, including our ability to make cash distributions to our unitholders. 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 make cash distributions to our unitholders. 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 March 31, 2016 and December 31, 2015 , we had accrued $0.9 million and $1.1 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 also 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 results of operations or cash flows for the period in which the resolution occurs.

Subsequent Events

Subsequent Events	3 Months Ended
	Mar. 31, 2016
Subsequent Events [Abstract]
Subsequent Events	14. Subsequent Events Effective May 2, 2016, we amended our Credit Agreement to, among other things, decrease the borrowing capacity under the revolving credit facility by $75.0 million to $825.0 million . Prior to this amendment, we were able to increase the aggregate commitments under the Credit Agreement by up to an additional $50 million subject to certain conditions, including the approval of the lenders. As a result of this amendment and subject to certain conditions, including the approval of the lenders, we are able to increase the aggregate commitments under the Credit Agreement by up to an additional $125 million .

Organization and Summary of S22

Organization and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Comprehensive Income (Loss)	Comprehensive Income (Loss) Components of comprehensive income (loss) are net income (loss) and all changes in equity during a period except those resulting from transactions with our limited partners or general partner. Our accumulated other comprehensive income (loss) consists only of derivative financial instruments. Changes in accumulated other comprehensive income (loss) represent changes in the fair value of derivative financial instruments that are designated as cash flow hedges to the extent the hedge is effective and amortization of terminated interest rate swaps. See Note 8 (“Accounting for Derivatives”) for additional disclosures related to comprehensive income (loss).
Financial Instruments	Financial Instruments Our financial instruments consist of cash, trade receivables, interest rate swaps and debt. At March 31, 2016 and December 31, 2015 , the estimated fair values of these financial instruments approximated their carrying amounts as reflected in our condensed consolidated balance sheets. The fair value of our fixed rate debt was estimated based on quoted market yields in inactive markets, which are Level 2 inputs. The fair value of our floating rate debt 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. See Note 9 (“Fair Value Measurements”) for additional information regarding the fair value hierarchy.
Income (Loss) Per Common Unit	Income Per Common Unit Income per common unit is computed using the two-class method. Under the two-class method, basic income per common unit is determined by dividing net income allocated to the common units after deducting the amounts allocated to our general partner (including distributions to our general partner on its incentive distribution rights) and participating securities, by the weighted average number of outstanding common units (also referred to as limited partner units) during the period. Participating securities include unvested phantom units with nonforfeitable tandem distribution equivalent rights to receive cash distributions in the quarter in which distributions are paid on common units. 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. When computing income per common unit in periods when distributions are greater than income, the amount of the actual incentive distribution rights, if any, is deducted from net income and allocated to our general partner for the corresponding period. The remaining amount of net income, after deducting distributions to participating securities, is allocated between the general partner and common units based on how our partnership agreement allocates net losses. When computing income per common unit in periods when income is greater than distributions, income is allocated to the general partner, participating securities and common units based on how our partnership agreement would allocate income if the full amount of income for the period had been distributed. This allocation of net income does not impact our total net income, consolidated results of operations or total cash distributions (including actual incentive distribution rights); however, it may result in our general partner being allocated additional incentive distributions for purposes of our income per unit calculation, which could reduce net income per common unit. However, as required by our partnership agreement, we determine cash distributions based on available cash and determine the actual incentive distributions allocable to our general partner based on actual distributions.
Recent Accounting Developments	ccounting Standards Updates Implemented In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update No. 2015-06 (“Update 2015-06”) that addresses the historical earnings per unit presentation for master limited partnerships that apply the two-class method of calculating earnings per unit when a drop-down transaction occurs between entities under common control. Update 2015-06 specifies that the historical earnings (losses) of a transferred business before the date of a dropdown transaction should be allocated entirely to the general partner and the previously reported earnings per unit of the limited partners should not change as a result of the dropdown transaction. Update 2015-06 was effective for reporting periods beginning after December 15, 2015 and is required to be applied retrospectively. As discussed in Note 3 (“Business Acquisitions”) , due to the impracticability of significant assumptions required to retroactively adjust historical financial statements upon the consummation of a dropdown, our financial statements have presented the assets acquired, liabilities assumed, revenue and direct operating expenses associated with the April 2015 Contract Operations Acquisition beginning on the date of such acquisition. We adopted Update 2015-06 in the first quarter of 2016 which had no impact on our consolidated financial statements. In April 2015, the FASB issued Accounting Standards Update 2015-03 (“Update 2015-03”) that addresses the presentation of debt issuance costs. Update 2015-03 requires an entity to present such costs in the balance sheet as a direct deduction from the carrying amount of the related debt liability rather than as an asset. Amortization of the costs will continue to be reported as interest expense. In August 2015, the FASB issued Accounting Standards Update 2015-15 (“Update 2015-15”) which clarifies that the guidance in Update 2015-03 does not apply to line-of-credit arrangements. Per Update 2015-15, line-of-credit arrangements will continue to defer and present debt issuance costs as an asset and subsequently amortize the deferred debt costs ratably over the term of the arrangement. Upon transition, an entity is required to comply with the applicable disclosures for a change in an accounting principle. Update 2015-03 was effective for reporting periods beginning after December 15, 2015 on a retrospective basis. We adopted Update 2015-03 in the first quarter of 2016, which resulted in the reclassification of an $11.6 million asset previously presented in intangibles and other assets, net on the condensed consolidated balance sheet to a contra-liability presented in long-term debt on the condensed consolidated balance sheet as of December 31, 2015. See Note 5 (“Long-Term Debt”) for further details. Accounting Standards Updates Not Yet Implemented In March 2016, the FASB issued Accounting Standards Update No. 2016-09 (“Update 2016-09”) that simplifies several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either debt or equity liabilities, and classification on the statement of cash flows. For public entities, Update 2016-09 is effective for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of Update 2016-09 on our consolidated financial statements. In February 2016, the FASB issued Accounting Standards Update No. 2016-02 (“Update 2016-02”) that establishes a right-of-use model that requires a lessee to record a right-of-use 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. Update 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. We are currently evaluating the impact of Update 2016-02 on our consolidated financial statements. In May 2014, the FASB issued Accounting Standards Update No. 2014-09 (“Update 2014-09”) that outlines a single comprehensive model for companies to use in accounting for revenue arising from contracts with customers and supersedes the most current revenue recognition guidance, including industry-specific guidance. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Update 2014-09 also requires disclosures enabling users of financial statements to understand the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Update 2014-09 will be effective for reporting periods beginning after December 15, 2017, including interim periods within the reporting period. Early adoption is permitted for reporting periods beginning after December 15, 2016. Companies may use either a full retrospective or a modified retrospective approach. In March 2016, the FASB issued Accounting Standards Update No. 2016-08 (“Update 2016-08”), which clarifies the guidance in Update 2014-09 by providing guidance on recording revenue on a gross basis versus a net basis based on the determination of whether an entity is a principal or an agent when another party is involved in providing goods or services to a customer. Update 2016-08 has the same effective date as the original standard. We are currently evaluating the potential impact of Update 2014-09 and Update 2016-08 on our consolidated financial statements.

Organization and Summary of S23

Organization and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2016
Accounting Policies [Abstract]
Schedule of the carrying amount and fair value of debt	The following table summarizes the carrying amount and fair value of our debt as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Carrying Amount (1) Fair Value Carrying Amount (1) Fair Value Fixed rate debt $ 681,250 $ 518,000 $ 680,484 $ 524,000 Floating rate debt 747,460 749,000 729,898 731,000 Total debt $ 1,428,710 $ 1,267,000 $ 1,410,382 $ 1,255,000 (1) Carrying values are shown net of unamortized debt discounts and unamortized deferred financing costs. See Note 5 (“Long-Term Debt”) for further details.
Schedule of reconciliation of net income used in calculation of basic and diluted earnings per common unit	The following table reconciles net income used in the calculation of basic and diluted income per common unit (in thousands): Three Months Ended March 31, 2016 2015 Net income $ 520 $ 20,085 Less: General partner incentive distribution rights (4 ) (3,887 ) Less: General partner 2% ownership interest (10 ) (322 ) Common units interest in net income 506 15,876 Less: Net income attributable to participating securities (57 ) (48 ) Net income used in basic and diluted income per common unit $ 449 $ 15,828
Schedule of potential common units included in computing diluted earnings per common unit	The following table shows the potential common units that were included in computing diluted income per common unit (in thousands): Three Months Ended March 31, 2016 2015 Weighted average common units outstanding including participating securities 59,827 55,739 Less: Weighted average participating securities outstanding (87 ) (61 ) Weighted average common units outstanding — used in basic income per common unit 59,740 55,678 Net dilutive potential common units issuable: Phantom units — — Weighted average common units and dilutive potential common units — used in diluted income per common unit 59,740 55,678

Business Acquisitions (Tables)

Business Acquisitions (Tables)	3 Months Ended
	Mar. 31, 2016
Business Acquisitions
Schedule of pro forma financial information	The following table shows pro forma financial information for the three months ended March 31, 2015 (in thousands, except per unit amounts): Three Months Ended Revenue $ 172,062 Net income $ 20,516 Basic income per common unit $ 0.27 Diluted income per common unit $ 0.27
March 2016 Acquisition
Business Acquisitions
Summary of purchase price allocation based on estimated fair values of acquired assets and liabilities as of the acquisition date	The following table summarizes the purchase price allocation based on estimated fair values of the acquired assets as of the acquisition date (in thousands): Fair Value Property, plant and equipment $ 14,929 Intangible assets 3,839 Purchase price $ 18,768
Schedule of amounts of finite-lived intangible assets, and their associated average useful lives	The amount of finite life intangible assets, and their associated average useful lives, was determined based on the period which the assets are expected to contribute directly or indirectly to our future cash flows, and consisted of the following: Amount (in thousands) Average Useful Life Customer related $ 3,839 2.3 years

Long-Term Debt (Tables)

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Schedule of long-term debt	Long-term debt consisted of the following (in thousands): March 31, 2016 December 31, 2015 Revolving credit facility due May 2018 $ 598,000 $ 580,500 Term loan facility due May 2018 150,000 150,000 Less: Deferred financing costs, net of amortization (540 ) (602 ) 149,460 149,398 6% senior notes due April 2021 350,000 350,000 Less: Debt discount, net of amortization (3,704 ) (3,862 ) Less: Deferred financing costs, net of amortization (5,139 ) (5,396 ) 341,157 340,742 6% senior notes due October 2022 350,000 350,000 Less: Debt discount, net of amortization (4,526 ) (4,673 ) Less: Deferred financing costs, net of amortization (5,381 ) (5,585 ) 340,093 339,742 Long-term debt $ 1,428,710 $ 1,410,382

Cash Distributions (Tables)

Cash Distributions (Tables)	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Summary of distributions per unit	The following table summarizes our distributions per unit for 2015 : Period Covering Payment Date Distribution per Limited Partner Unit Total Distribution (1) 1/1/2015 — 3/31/2015 May 15, 2015 $ 0.5625 $ 35.9 million 4/1/2015 — 6/30/2015 August 14, 2015 0.5675 39.1 million 7/1/2015 — 9/30/2015 November 13, 2015 0.5725 39.7 million 10/1/2015 — 12/31/2015 February 12, 2016 0.5725 39.7 million (1) Includes distributions to our general partner on its incentive distribution right

Unit-Based Compensation (Tables

Unit-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of phantom unit activity	The following table presents phantom unit activity during the three months ended March 31, 2016 : Phantom Units Weighted Average Grant-Date Fair Value per Unit Phantom units outstanding, January 1, 2016 77,173 $ 27.01 Granted 189,945 7.84 Vested (68,548 ) 18.59 Phantom units outstanding, March 31, 2016 198,570 11.58

Accounting for Derivatives (Tab

Accounting for Derivatives (Tables)	3 Months Ended
	Mar. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	At March 31, 2016 , we were 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: Expiration Date Notional Value (in millions) May 2018 $ 300 May 2019 100 May 2020 100 $ 500
Effect of derivative instruments on consolidated financial position	The following tables present the effect of derivative instruments on our consolidated financial position and results of operations (in thousands): March 31, 2016 December 31, 2015 Balance Sheet Location Fair Value Asset (Liability) Fair Value Asset (Liability) Derivatives designated as hedging instruments: Interest rate swaps Intangible and other assets, net $ — $ 45 Interest rate swaps Current portion of interest rate swaps (4,949 ) (4,608 ) Interest rate swaps Other long-term liabilities (5,470 ) (1,421 ) Total derivatives $ (10,419 ) $ (5,984 )
Effect of derivative instruments on results of operations	Loss Recognized in Other Comprehensive Income (Loss) on Derivatives Location of Loss Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss) Loss Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss) Derivatives designated as cash flow hedges: Interest rate swaps Three months ended March 31, 2016 $ (5,932 ) Interest expense $ (1,036 ) Three months ended March 31, 2015 (6,253 ) Interest expense (1,525 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities measured at fair value on a recurring basis with pricing levels as of the date of valuation	The following table presents our assets and liabilities measured at fair value on a recurring basis as of March 31, 2016 and December 31, 2015 , with pricing levels as of the date of valuation (in thousands): March 31, 2016 December 31, 2015 (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Interest rate swaps asset $ — $ — $ — $ — $ 45 $ — Interest rate swaps liability — (10,419 ) — — (6,029 ) —
Schedule of assets and liabilities measured at fair value on a nonrecurring basis with pricing levels as of the date of valuation	The following table presents our assets and liabilities measured at fair value on a nonrecurring basis as of March 31, 2016 and December 31, 2015 , with pricing levels as of the date of valuation (in thousands): March 31, 2016 December 31, 2015 (Level 1) (Level 2) (Level 3) (Level 1) (Level 2) (Level 3) Impaired long-lived assets $ — $ — $ 381 $ — $ — $ 2,789

Organization and Summary of S30

Organization and Summary of Significant Accounting Policies - Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Carrying Amount
Financial Instruments
Total debt	$ 1,428,710	$ 1,410,382
Carrying Amount | Fixed rate debt
Financial Instruments
Total debt	681,250	680,484
Carrying Amount | Floating rate debt
Financial Instruments
Total debt	747,460	729,898
Fair Value
Financial Instruments
Total debt	1,267,000	1,255,000
Fair Value | Fixed rate debt
Financial Instruments
Total debt	518,000	524,000
Fair Value | Floating rate debt
Financial Instruments
Total debt	$ 749,000	$ 731,000

Organization and Summary of S31

Organization and Summary of Significant Accounting Policies - Goodwill (Details) $ in Millions	3 Months Ended
	Dec. 31, 2015USD ($)
Goodwill, Impaired
Goodwill, impairment loss	$ 127.8

Organization and Summary of S32

Organization and Summary of Significant Accounting Policies - Income (Loss) Per Common Unit (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Earnings (Loss) Per Common Unit
Net income	$ 520	$ 20,085
Less: General partner incentive distribution rights	(4)	(3,887)
Less: General partner 2% ownership interest	(10)	(322)
Common units interest in net income	506	15,876
Less: Net income attributable to participating securities	(57)	(48)
Net income used in basic and diluted income per common unit	$ 449	$ 15,828
General partner units, interest (as a percent)	2.00%	2.00%	2.00%
Potential common units included in computing the dilutive potential common units used in dilutive earnings per common unit
Weighted average common units outstanding including participating securities (in units)	59,827	55,739
Less: Weighted average participating securities outstanding (in units)	(87)	(61)
Weighted average common units outstanding - used in basic earnings per common unit (in units)	59,740	55,678
Net dilutive potential common units issuable:
Phantom units (in units)	0	0
Weighted average common units and dilutive potential common units - used in diluted earnings per common unit (in units)	59,740	55,678

Recent Accounting Developments

Recent Accounting Developments (Details) - Accounting Standard Update 2015-03 $ in Millions	Dec. 31, 2015USD ($)
Long-term debt
New Accounting Pronouncements or Change in Accounting Principle
Deferred finance costs	$ 11.6
Intangible assets and other assets
New Accounting Pronouncements or Change in Accounting Principle
Deferred finance costs	$ (11.6)

Business Acquisitions - March 2

Business Acquisitions - March 2016 Acquisition (Narratives) (Details) hp in Thousands, $ in Thousands	Mar. 01, 2016USD ($)customercompressor_unithpshares	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2015
Business Acquisitions
Payments to acquire business		$ 13,779	$ 0
Units issued in connection with acquisition (value)		$ 1,799	$ 0
General partner units, interest (as a percent)		2.00%	2.00%	2.00%
March 2016 Acquisition
Business Acquisitions
Number of customers with service agreements | customer	4
Number of compressor units used to provide compression services | compressor_unit	19
Horsepower of compressor units used to provide compression services | hp	23
Payments to acquire business	$ 18,800
Line of credit outstanding	$ 13,800
Number of like kind exchanged compressor units | compressor_unit	24
Like kind exchanged compressor units, value	$ 3,200
Transaction costs incurred	$ 200
Property, plant and equipment, useful life	15 years
March 2016 Acquisition | Partners' Capital Common Units
Business Acquisitions
Units issued in connection with acquisition (in units) | shares	257,000
Units issued in connection with acquisition (value)	$ 1,800
March 2016 Acquisition | Partners' Capital General Partner Units
Business Acquisitions
Units issued in connection with acquisition (in units) | shares	5,205
General partner units, interest (as a percent)	2.00%

Business Acquisitions - Net Ass

Business Acquisitions - Net Assets Acquired (Details) - March 2016 Acquisition $ in Thousands	Mar. 01, 2016USD ($)
Net Assets Acquired
Property, plant and equipment	$ 14,929
Intangible assets	3,839
Purchase price	$ 18,768

Business Acquisitions - Finite

Business Acquisitions - Finite Lived Assets Acquired (Details) - March 2016 Acquisition - Customer related $ in Thousands	Mar. 01, 2016USD ($)
Business Acquisitions
Total acquired identifiable intangible assets	$ 3,839
Weighted average useful life	2 years 3 months 18 days

Business Acquisitions - April 2

Business Acquisitions - April 2015 Contract Operations Acquisition (Narratives) (Details) - April 2015 Contract Operations Acquisition shares in Thousands, hp in Thousands, $ in Millions	Apr. 17, 2015USD ($)customercompressor_unithpshares
Business Acquisitions
Number of customers with service agreements | customer	60
Number of compressor units used to provide compression services | compressor_unit	238
Horsepower of compressor units used to provide compression services | hp	148
Business combination, percentage of available horsepower provided	3.00%
Property, plant and equipment	$ 108.8
Business acquisition, accumulated depreciation related to assets acquired	59.9
Business combination, consideration transferred	102.3
Customer related
Business Acquisitions
Finite lived assets acquired	$ 1.1
Archrock
Business Acquisitions
Number of compressor units acquired | compressor_unit	179
Horsepower of compressor units acquired | hp	66
Partners' Capital Common Units
Business Acquisitions
Units issued in connection with acquisition (in units) | shares	4,000
Partners' Capital General Partner Units
Business Acquisitions
Units issued in connection with acquisition (in units) | shares	80

Business Acquisitions - Pro For

Business Acquisitions - Pro Forma Financial Information (Narratives) (Details) - USD ($) shares in Thousands, $ in Millions	Apr. 17, 2015	Mar. 31, 2015
Business Acquisitions
Additional pro forma reduction of net income allocable to the entity's limited partners		$ 0.3
April 2015 Contract Operations Acquisition | Partners' Capital Common Units
Business Acquisitions
Units issued in connection with acquisition (in units)	4,000
April 2015 Contract Operations Acquisition | Partners' Capital General Partner Units
Business Acquisitions
Units issued in connection with acquisition (in units)	80

Business Acquisitions - Pro F39

Business Acquisitions - Pro Forma Financial Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2015USD ($)$ / shares
Pro forma financial information
Revenue | $	$ 172,062
Net income | $	$ 20,516
Basic income per common unit (in dollars per unit) | $ / shares	$ 0.27
Diluted income per common unit (in dollars per unit) | $ / shares	$ 0.27

Related Party Transactions (Det

Related Party Transactions (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)compressor_unithp	Mar. 31, 2015USD ($)compressor_unithp	Dec. 31, 2015USD ($)
Related party transactions
Accumulated depreciation of leased equipment	$ 861,174		$ 846,213
Archrock
Related party transactions
Amount of compression equipment purchased from related party		$ 55,800
Amount of fabricated compression equipment purchased from related party and recorded in our consolidated balance sheet as property, plant and equipment at carrying values of related party		51,300
Excess amount over carrying value of fabricated compression equipment purchased from related party recorded as distribution of equity		4,500
Amount contributed by related party related to completion of overhauls on compression equipment	$ 600	$ 2,200
Number of compressor units transferred to a related party | compressor_unit	115	127
Horsepower of compressor units transferred to related party | hp	48,500	47,800
Net book value of compressor units transferred to related party	$ 22,900	$ 23,300
Number of compressor units transferred by related party | compressor_unit	103	107
Horsepower of compressor units transferred by related party | hp	40,000	40,000
Net book value of compressor units transferred by related party	$ 23,800	$ 17,900
Capital contributions (distributions) recorded related to differences in net book value of compressor units exchanged to our assets transferred to related party	900	(5,400)
Revenue — affiliates	100	100
Cost of sales related to lease	100	1,100
Archrock | Equipment Leased to Other Party
Related party transactions
Aggregate costs of leased equipment	42		10,100
Accumulated depreciation of leased equipment	$ 24		$ 3,300
Exterran Corporation
Related party transactions
Amount of compression equipment purchased from related party		$ 10,700

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Apr. 30, 2014	Mar. 31, 2013
Long-Term Debt
Long-term debt	$ 1,428,710	$ 1,410,382
6% senior notes due April 2021
Long-Term Debt
Long-term debt, gross	350,000	350,000
Less: Debt discount, net of amortization	(3,704)	(3,862)
Less: Deferred financing costs, net of amortization	(5,139)	(5,396)
Long-term debt	$ 341,157	$ 340,742
Interest rate (as a percent)	6.00%	6.00%		6.00%
6% senior notes due October 2022
Long-Term Debt
Long-term debt, gross	$ 350,000	$ 350,000
Less: Debt discount, net of amortization	(4,526)	(4,673)
Less: Deferred financing costs, net of amortization	(5,381)	(5,585)
Long-term debt	$ 340,093	$ 339,742
Interest rate (as a percent)	6.00%	6.00%	6.00%
Revolving credit facility due May 2018
Long-Term Debt
Long-term debt	$ 598,000	$ 580,500
Term loan facility due May 2018
Long-Term Debt
Long-term debt, gross	150,000	150,000
Less: Deferred financing costs, net of amortization	(540)	(602)
Long-term debt	$ 149,460	$ 149,398

Long-Term Debt - Revolving Cred

Long-Term Debt - Revolving Credit Facility and Term Loan (Details)	May. 02, 2016USD ($)	Feb. 28, 2015USD ($)	Mar. 31, 2016USD ($)	Mar. 31, 2015USD ($)
Revolving credit facility and term loan facility
Long-Term Debt
Transaction costs				$ 1,300,000
Revolving credit facility due May 2018
Long-Term Debt
Increase (decrease) in borrowing capacity		$ 250,000,000
Maximum borrowing capacity		900,000,000
Undrawn capacity under revolving credit facility			$ 302,000,000
Available borrowings under revolving credit facility			302,000,000
Debt repayment threshold			$ 50,000,000
Term loan facility due May 2018
Long-Term Debt
Maximum borrowing capacity		$ 150,000,000
Minimum | Revolving credit facility due May 2018 | Interest expense
Long-Term Debt
EBITDA threshold			2.75
Period One | Maximum | Revolving credit facility due May 2018 | Debt
Long-Term Debt
EBITDA threshold			5.95
Period One | Maximum | Senior Notes
Long-Term Debt
EBITDA threshold			3.50
Period Two | Maximum | Revolving credit facility due May 2018 | Debt
Long-Term Debt
EBITDA threshold			5.75
Period Two | Maximum | Senior Notes
Long-Term Debt
EBITDA threshold			3.75
Period Three | Maximum | Revolving credit facility due May 2018 | Debt
Long-Term Debt
EBITDA threshold			5.25
EBITDA temporary changes			5.5
Period Three | Maximum | Senior Notes
Long-Term Debt
EBITDA threshold			4
Subsequent Event | Revolving credit facility due May 2018
Long-Term Debt
Increase (decrease) in borrowing capacity	$ (75,000,000)
Maximum borrowing capacity	825,000,000
Line of credit remaining potential increase to borrowing capacity	50,000,000
Aggregate maximum increase to credit facility	$ 125,000,000

Long-Term Debt - Senior Notes (

Long-Term Debt - Senior Notes (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015	Apr. 30, 2014	Mar. 31, 2013
Long-Term Debt
Ownership percentage (as a percent)	100.00%
Amount of independent assets or operations	$ 0
6% senior notes due April 2021
Long-Term Debt
Principle amount of senior notes				$ 350,000,000
Interest rate (as a percent)	6.00%	6.00%		6.00%
6% senior notes due October 2022
Long-Term Debt
Principle amount of senior notes			$ 350,000,000
Interest rate (as a percent)	6.00%	6.00%	6.00%

Cash Distributions (Narratives)

Cash Distributions (Narratives) (Details) - USD ($) $ / shares in Units, $ in Millions	May. 02, 2016	Feb. 12, 2016	Nov. 13, 2015	Aug. 14, 2015	May. 15, 2015	Mar. 31, 2016	Mar. 31, 2015
Partners' Equity, Allocations and Cash Distributions
Distribution per limited partner unit (in dollars per unit)		$ 0.5725	$ 0.5725	$ 0.5675	$ 0.5625	$ 0.5725	$ 0.5575
Subsequent Event
Partners' Equity, Allocations and Cash Distributions
Cash distribution declared (in dollars per unit)	$ 0.2850
Cash distribution amount declared	$ 17.5
Partners' Capital Common Units | First order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						98.00%
Partners' Capital Common Units | Second order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						85.00%
Partners' Capital Common Units | Third order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						75.00%
Partners' Capital Common Units | Thereafter order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						50.00%
Partners' Capital General Partner Units | First order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						2.00%
Partners' Capital General Partner Units | Second order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						15.00%
Partners' Capital General Partner Units | Third order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						25.00%
Partners' Capital General Partner Units | Thereafter order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Percentage of operating surplus distributed to unitholders						50.00%
Partners' Capital General Partner and Common Units | First order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Distribution per limited partner unit (in dollars per unit)						$ 0.4025
Partners' Capital General Partner and Common Units | Second order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Distribution per limited partner unit (in dollars per unit)						0.4375
Partners' Capital General Partner and Common Units | Third order of cash distribution
Partners' Equity, Allocations and Cash Distributions
Distribution per limited partner unit (in dollars per unit)						$ 0.5250

Cash Distributions Cash Distrib

Cash Distributions Cash Distributions (Details) - USD ($) $ / shares in Units, $ in Thousands	Feb. 12, 2016	Nov. 13, 2015	Aug. 14, 2015	May. 15, 2015	Mar. 31, 2016	Mar. 31, 2015
Summary of distributions per unit
Distribution per limited partner unit (in dollars per unit)	$ 0.5725	$ 0.5725	$ 0.5675	$ 0.5625	$ 0.5725	$ 0.5575
Total Distribution	$ 39,700	$ 39,700	$ 39,100	$ 35,900	$ 39,680	$ 35,323

Unit-Based Compensation - Long-

Unit-Based Compensation - Long-term Incentive Plan (Details)	Mar. 31, 2016shares
Long-Term Incentive Plan
Unit-Based Compensation
Maximum number of shares available under the Plan	1,035,378

Unit-Based Compensation - Phant

Unit-Based Compensation - Phantom Units (Details) - Phantom Units $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)$ / sharesshares
Unit-Based Compensation
Vesting period	3 years
Phantom Units
Beginning balance (in units) | shares	77,173
Granted (in units) | shares	189,945
Vested (in units) | shares	(68,548)
Ending balance (in units) | shares	198,570
Weighted Average Grant-Date Fair Value per Unit
Beginning balance (in dollars per unit) | $ / shares	$ 27.01
Granted (in dollars per unit) | $ / shares	7.84
Vested (in dollars per unit) | $ / shares	18.59
Ending balance (in dollars per unit) | $ / shares	$ 11.58
Unrecognized compensation cost
Expected unrecognized compensation cost related to unvested phantom units (in dollars) | $	$ 2.1
Weighted-average period during which the expected unrecognized compensation cost related to unvested phantom units to be recognized	2 years 8 months 12 days
First anniversary vesting
Unit-Based Compensation
Vesting percentage	33.33%
Second anniversary vesting
Unit-Based Compensation
Vesting percentage	33.33%
Third anniversary vesting
Unit-Based Compensation
Vesting percentage	33.33%

Accounting for Derivatives - In

Accounting for Derivatives - Interest Rate Risk (Details) - Derivatives designated as hedging instruments - Interest rate swaps $ in Millions	Mar. 31, 2016USD ($)
Accounting for Derivatives
Notional amount of interest rate swaps	$ 500
Derivative expiring in 2018
Accounting for Derivatives
Notional amount of interest rate swaps	300
Derivative expiring in 2019
Accounting for Derivatives
Notional amount of interest rate swaps	100
Derivative expiring in 2020
Accounting for Derivatives
Notional amount of interest rate swaps	$ 100

Accounting for Derivatives - 49

Accounting for Derivatives - Interest Rate Risk (Narratives) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2016
Accounting for Derivatives
Interest income recorded due to ineffectiveness related to interest rate swaps	$ 0.3
Deferred losses to be reclassified during next 12 months		$ 4
Interest rate swaps | Derivatives designated as hedging instruments
Accounting for Derivatives
Weighted average effective fixed interest rate on interest rate swaps (as a percent)		1.60%

Accounting for Derivatives - Ef

Accounting for Derivatives - Effect on Derivative Instruments on the Balance Sheet (Details) - Derivatives designated as hedging instruments - Interest rate swaps - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Accounting for Derivatives
Total derivatives, Fair value	$ (10,419)	$ (5,984)
Intangible and other assets, net
Accounting for Derivatives
Derivatives asset , fair value	0	45
Current portion of interest rate swaps
Accounting for Derivatives
Derivatives liability, fair value	(4,949)	(4,608)
Other long-term liabilities
Accounting for Derivatives
Derivatives liability, fair value	$ (5,470)	$ (1,421)

Accounting for Derivatives - 51

Accounting for Derivatives - Effect on Derivative Instruments on the Income Statement (Details) - Derivatives designated as cash flow hedges - Interest rate swaps - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Effect of derivative instruments on results of operations
Loss Recognized in Other Comprehensive Income (Loss) on Derivatives	$ (5,932)	$ (6,253)
Interest expense
Effect of derivative instruments on results of operations
Loss Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss)	$ (1,036)	$ (1,525)

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Recurring basis | (Level 1)
Fair value measurements
Interest rate swaps asset	$ 0	$ 0
Interest rate swaps liability	0	0
Recurring basis | (Level 2)
Fair value measurements
Interest rate swaps asset	0	45
Interest rate swaps liability	(10,419)	(6,029)
Recurring basis | (Level 3)
Fair value measurements
Interest rate swaps asset	0	0
Interest rate swaps liability	0	0
Nonrecurring basis | (Level 1)
Fair value measurements
Impaired long-lived assets	0	0
Nonrecurring basis | (Level 2)
Fair value measurements
Impaired long-lived assets	0	0
Nonrecurring basis | (Level 3)
Fair value measurements
Impaired long-lived assets	$ 381	$ 2,789

Fair Value Measurements (Narrat

Fair Value Measurements (Narratives) (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Impaired long-lived assets
Fair value measurements
Weighted average disposal period used in estimation of the fair value of the impaired long-lived assets	4 years	4 years

Restructuring Charges (Details)

Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring charges	$ 4,139	$ 0

Long-Lived Asset Impairment (De

Long-Lived Asset Impairment (Details) hp in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)compressor_unithp	Mar. 31, 2015USD ($)compressor_unithp
Long-lived asset impairment
Long-lived asset impairment	$ 6,315	$ 3,484
Idle compressor units
Long-lived asset impairment
Number of long-lived assets to be retired | compressor_unit	60	30
Horsepower of long-lived assets to be retired | hp	22	11
Long-lived asset impairment	$ 6,300	$ 3,500

Unit Transactions (Details)

Unit Transactions (Details) - USD ($) $ in Thousands	Mar. 01, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Unit Transactions
Net proceeds from sale of common units		$ 37	$ 0
General partner units, interest (as a percent)		2.00%	2.00%	2.00%
General partner units owned (in units)		1,214,767		1,209,562
Archrock
Unit Transactions
Common units owned (in units)		23,582,056
General partner units owned (in units)		1,214,767
General partner's ownership interest in partnership (as a percent)		40.00%
March 2016 Acquisition
Unit Transactions
Purchase price	$ 18,768
Limited Partner Units | March 2016 Acquisition
Unit Transactions
Net proceeds from sale of common units	$ 1,800
Partners' Capital General Partner Units | March 2016 Acquisition
Unit Transactions
Units issued in connection with acquisition (in units)	5,205
General partner units, interest (as a percent)	2.00%
ATM Agreement | Limited Partner Units
Unit Transactions
Units issued in connection with acquisition (in units)	257,000

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Millions	Sep. 23, 2015case	Mar. 31, 2016USD ($)case	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
Number of heavy equipment statutes cases tried and completed in Texas state district court | case		3
Number of heavy equipment statutes cases appealed | case		3
Number of heavy equipment statutes appellate cases with favorable ruling | case	2
Ad valorem tax benefit		$ 3.5	$ 38.8
Ad valorem tax benefit agreed to by a number of appraisal review boards and county appraisal districts		8	8
Ad valorem tax benefit in litigation		30.8	30.8
Accrued liability for the outcomes of non-income based tax audits		$ 0.9	$ 0.9	$ 1.1

Subsequent Events (Details)

Subsequent Events (Details) - Revolving credit facility due May 2018 - USD ($)	May. 02, 2016	Feb. 28, 2015
Subsequent Event
Increase (decrease) in borrowing capacity		$ 250,000,000
Maximum borrowing capacity		$ 900,000,000
Subsequent Event
Subsequent Event
Increase (decrease) in borrowing capacity	$ (75,000,000)
Maximum borrowing capacity	825,000,000
Line of credit remaining potential increase to borrowing capacity	50,000,000
Aggregate maximum increase to credit facility	$ 125,000,000