Summit Midstream Partners (SMLP) 10-Q 5 Aug 22 2022 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Jul. 29, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity File Number	001-35666
Entity Registrant Name	Summit Midstream Partners, LP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	45-5200503
Entity Address, Address Line One	910 Louisiana Street
Entity Address, Address Line Two	Suite 4200
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	832
Local Phone Number	413-4770
Title of 12(b) Security	Common Units
Trading Symbol	SMLP
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		10,166,175
Entity Central Index Key	0001549922
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2

UNAUDITED CONDENSED CONSOLIDATE

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
ASSETS
Cash and cash equivalents	$ 12,367	$ 7,349
Restricted cash	3,333	12,223
Accounts receivable	59,392	62,121
Other current assets	3,716	5,676
Total current assets	78,808	87,369
Property, plant and equipment, net	1,531,450	1,726,082
Intangible assets, net	156,877	172,927
Investment in equity method investees	519,553	523,196
Other noncurrent assets	23,645	12,888
TOTAL ASSETS	2,310,333	2,522,462
LIABILITIES AND CAPITAL
Trade accounts payable	8,378	10,498
Accrued expenses	21,323	14,462
Deferred revenue	9,720	10,374
Ad valorem taxes payable	4,738	8,570
Accrued compensation and employee benefits	6,760	11,019
Accrued interest	15,992	12,737
Accrued environmental remediation	2,108	3,068
Current portion of long-term debt	7,526	0
Other current liabilities	10,476	8,509
Total current liabilities	87,021	79,237
Long-term debt, net of issuance costs	1,232,512	1,355,072
Noncurrent deferred revenue	40,362	42,570
Noncurrent accrued environmental remediation	2,272	2,538
Other noncurrent liabilities	32,184	32,357
Total liabilities	1,394,351	1,511,774
Commitments and contingencies (Note 14)
Mezzanine Capital
Subsidiary Series A Preferred Units (93,039 and 91,439 units issued and outstanding at June 30, 2022 and December 31, 2021, respectively)	113,574	106,325
Partners' Capital
Series A Preferred Units (65,508 and 143,447 units issued and outstanding at June 30, 2022 and December 31, 2021, respectively)	81,290	169,769
Common limited partner capital (10,166,175 and 7,169,834 units issued and outstanding at June 30, 2022 and December 31, 2021, respectively)	721,118	734,594
Total partners' capital	802,408	904,363
TOTAL LIABILITIES AND CAPITAL	$ 2,310,333	$ 2,522,462

UNAUDITED CONDENSED CONSOLIDA_2

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Jun. 30, 2022	Dec. 31, 2021
Partners' Capital
Common limited partner capital (in shares), issued	10,166,175	7,169,834
Common limited partner capital (in shares), outstanding	10,166,175	7,169,834
Subsidiary Series A Preferred Units
Subsidiary Series A preferred unitholders, issued (in shares)	93,039,000	91,439,000
Preferred units, outstanding (in shares)	93,039,000	91,439,000
Series A Preferred Units
Subsidiary Series A preferred unitholders, issued (in shares)	65,508	143,447
Preferred units, outstanding (in shares)	65,508	143,447

UNAUDITED CONDENSED CONSOLIDA_3

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Revenues:
Total revenues	$ 99,063	$ 100,041	$ 195,189	$ 199,359
Costs and expenses:
Cost of natural gas and NGLs	26,831	16,626	49,082	37,102
Operation and maintenance	22,277	17,507	39,339	34,100
General and administrative	10,473	29,360	23,433	39,938
Depreciation and amortization	30,111	28,364	60,556	56,875
Transaction costs	(13)	450	233	217
Gain on asset sales, net	(313)	(4)	(310)	(140)
Long-lived asset impairments	84,614	33	84,628	1,525
Total costs and expenses	173,980	92,336	256,961	169,617
Other income (expense), net	(4)	352	(4)	408
Gain (loss) on interest rate swaps	3,936	(2,686)	10,964	(2,692)
Loss on ECP Warrants	0	(12,159)	0	(13,634)
Interest expense	(24,887)	(15,502)	(49,050)	(29,455)
Loss before income taxes and equity method investment income	(95,872)	(22,290)	(99,862)	(15,631)
Income tax (expense) benefit	(325)	248	(375)	262
Income from equity method investees	4,393	2,304	8,428	4,619
Net loss	(91,804)	(19,738)	(91,809)	(10,750)
Net loss attributable to Summit Midstream Partners, LP	(94,968)	(23,827)	(100,686)	(18,771)
Add: deemed contribution from 2022 Preferred Exchange Offer	0	0	20,974	0
Add: Deemed capital contribution from 2021 Preferred Exchange Offer	$ 0	$ 8,326	$ 0	$ 8,326
Net loss per limited partner unit:
Common unit - basic (in dollars per share)	$ (9.53)	$ (2.91)	$ (8.45)	$ (2.91)
Common unit - diluted (in dollars per share)	$ (9.53)	$ (2.91)	$ (8.45)	$ (2.91)
Series A Preferred Units
Costs and expenses:
Less: net income attributable to Series A Preferred Units	$ (1,888)	$ (3,849)	$ (4,108)	$ (8,136)
Series A Preferred Units | Subsidiary
Costs and expenses:
Less: net income attributable to Series A Preferred Units	(3,164)	(4,089)	(8,877)	(8,021)
Common Units
Costs and expenses:
Net income (loss) attributable to limited partners	$ (96,856)	$ (19,350)	$ (83,820)	$ (18,581)
Weighted-average limited partner units outstanding:
Common units - basic (in shares)	10,166	6,656	9,919	6,392
Common units - diluted (in shares)	10,166	6,656	9,919	6,392
Gathering services and related fees
Revenues:
Total revenues	$ 61,631	$ 74,233	$ 125,651	$ 144,580
Natural gas, NGLs and condensate sales
Revenues:
Total revenues	28,278	16,416	50,736	37,180
Other revenues
Revenues:
Total revenues	$ 9,154	$ 9,392	$ 18,802	$ 17,599

UNAUDITED CONDENSED CONSOLIDA_4

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL - USD ($) $ in Thousands	Total	Partners' Capital	Partners' Capital Series A Preferred Stock
Beginning balance at Dec. 31, 2020	$ 922,891	$ 748,466	$ 174,425
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	5,056	769	4,287
Unit-based compensation	1,967	1,967
Tax withholdings and associated payments on vested SMLP LTIP awards	(1,274)	(1,274)
Ending balance at Mar. 31, 2021	928,640	749,928	178,712
Beginning balance at Dec. 31, 2020	922,891	748,466	174,425
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of Preferred Exchange Offer		20,654
Ending balance at Jun. 30, 2021	905,298	743,391	161,907
Beginning balance at Mar. 31, 2021	928,640	749,928	178,712
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(23,827)	(27,676)	3,849
Unit-based compensation	1,048	1,048
Tax withholdings and associated payments on vested SMLP LTIP awards	(98)	(98)
Tax withholdings on 2021 Preferred Exchange Offer	(465)	(465)
Effect of Preferred Exchange Offer	0		(20,654)
Ending balance at Jun. 30, 2021	905,298	743,391	161,907
Beginning balance at Dec. 31, 2021	904,363	734,594	169,769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(5,718)	(7,938)	2,220
Unit-based compensation	1,690	1,690
Tax withholdings and associated payments on vested SMLP LTIP awards	(562)	(562)
Tax withholdings on 2022 Preferred Exchange Offer	(2,652)	(2,652)
Effect of Preferred Exchange Offer	0	92,587	(92,587)
Ending balance at Mar. 31, 2022	897,121	817,719	79,402
Beginning balance at Dec. 31, 2021	904,363	734,594	169,769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Effect of Preferred Exchange Offer		0
Ending balance at Jun. 30, 2022	802,408	721,118	81,290
Beginning balance at Mar. 31, 2022	897,121	817,719	79,402
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(94,968)	(96,856)	1,888
Unit-based compensation	582	582
Tax withholdings and associated payments on vested SMLP LTIP awards	(327)	(327)
Ending balance at Jun. 30, 2022	$ 802,408	$ 721,118	$ 81,290

UNAUDITED CONDENSED CONSOLIDA_5

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (Parenthetical) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Jun. 30, 2021
Statement of Partners' Capital [Abstract]
Deemed contribution to common unit holders	$ 20.9	$ 8.3

UNAUDITED CONDENSED CONSOLIDA_6

UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net loss	$ (91,809)	$ (10,750)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	61,025	57,344
Noncash lease expense	468	519
Amortization of debt issuance costs	4,441	3,447
Unit-based and noncash compensation	2,272	3,015
Income from equity method investees	(8,428)	(4,619)
Distributions from equity method investees	20,451	13,116
Gain on asset sales, net	(310)	(140)
Loss on ECP Warrants	0	13,634
(Gain) loss on interest rate swaps, unsettled	(11,617)	2,692
Long-lived asset impairment	84,628	1,525
Changes in operating assets and liabilities:
Accounts receivable	(3,010)	(1,993)
Trade accounts payable	(1,090)	2,989
Accrued expenses	11,599	(3,127)
Deferred revenue, net	(2,748)	(2,787)
Ad valorem taxes payable	(3,384)	(3,691)
Accrued interest	3,254	0
Accrued environmental remediation, net	(1,226)	(512)
Other, net	(4,357)	15,555
Net cash provided by operating activities	60,159	86,217
Cash flows from investing activities:
Capital expenditures	(14,794)	(5,962)
Proceeds from sale of Lane G&P System, net of cash sold in transaction	75,520	0
Proceeds from asset sale	4,600	8,000
Investment in Double E equity method investee	(8,444)	(48,943)
Net cash provided from (used in) investing activities	56,882	(46,905)
Cash flows from financing activities:
Repayments on Revolving Credit Facility	0	(95,000)
Borrowings under Permian Transmission Credit Facility	0	53,500
Repayments on Permian Transmission Term Loan	(2,242)	0
Repayments on ABL Facility	(139,000)	0
Borrowings on ABL Facility	23,000
Debt issuance costs	0	(5,179)
Proceeds from asset sale	0	260
Other, net	(2,671)	(912)
Net cash used in financing activities	(120,913)	(47,331)
Net change in cash, cash equivalents and restricted cash	(3,872)	(8,019)
Cash, cash equivalents and restricted cash, beginning of period	19,572	15,544
Cash, cash equivalents and restricted cash, end of period	$ 15,700	$ 7,525

ORGANIZATION, BUSINESS OPERATIO

ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION	6 Months Ended
	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION	1. ORGANIZATION, BUSINESS OPERATIONS AND PRESENTATION AND CONSOLIDATION Organization. Summit Midstream Partners, LP (including its subsidiaries, collectively “SMLP” or the “Partnership”) is a Delaware limited partnership that was formed in May 2012 and began operations in October 2012. SMLP is a value-oriented limited partnership focused on developing, owning and operating midstream energy infrastructure assets that are strategically located in unconventional resource basins, primarily shale formations, in the continental United States. The Partnership’s business activities are primarily conducted through various operating subsidiaries, each of which is owned or controlled by its wholly owned subsidiary holding company, Summit Holdings, a Delaware limited liability company. Business Operations. The Partnership provides natural gas gathering, compression, treating and processing services as well as crude oil and produced water gathering services pursuant to primarily long-term, fee-based agreements with its customers. The Partnership’s results are primarily driven by the volumes of natural gas that it gathers, compresses, treats and/or processes as well as by the volumes of crude oil and produced water that it gathers. Other than the Partnership’s investments in Double E and Ohio Gathering, all of its business activities are conducted through wholly owned operating subsidiaries. Presentation and Consolidation. The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The unaudited condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein. These unaudited condensed consolidated financial statements and notes thereto should be read in conjunction with the consolidated financial statements and related notes that are included in the Partnership’s Annual Report on Form 10-K for the year ended December 31, 2021. The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates. The unaudited condensed consolidated financial statements contained in this report include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented. Risks and Uncertainties. The Partnership continues to closely monitor the impact of the COVID-19 pandemic on all aspects of its business, including how it has impacted and will impact its customers, employees, supply chain and distribution network. The Partnership is unable to predict the ultimate impact that COVID-19 may have on its business, future results of operations, financial position or cash flows. Given the dynamic nature of the COVID-19 pandemic and related market conditions, the Partnership cannot reasonably estimate the period of time that these events will persist or the full extent of the impact they will have on its business. The full extent to which the Partnership’s operations continue to be impacted by the COVID-19 pandemic will depend largely on future developments, which remain highly uncertain and cannot be accurately predicted. While many of the restrictions and measures initially implemented during 2020 have since been softened or lifted in varying degrees in different locations around the world, and the manufacture and distribution of COVID-19 vaccines during 2021 and throughout the first half of 2022 helped to initiate a recovery from the pandemic, the uncertainty regarding new potential variants of COVID-19 and the success of any vaccines in respect thereof, may in the future cause a reduction in global economic activity or prompt the re-imposition of certain restrictions and measures. In addition, even if not required by governmental authorities, increases in COVID-19 cases, such as if a new variant emerges, may result in significantly reduced economic activity, particularly in affected areas, which could result in a sharp reduction in the demand for oil and a decline in oil prices as occurred during 2020.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP	2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP There have been no changes to the Partnership’s significant accounting policies since December 31, 2021. New accounting standards not yet implemented. ASU No. 2020-6 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815–40) (“ASU 2020-6”). ASU 2020-6 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The Partnership is currently evaluating the provisions of ASU 2020-6 to determine its impact on the Partnership’s consolidated financial statements and disclosures. ASU No. 2020-4 Reference Rate Reform (“ASU 2020-4”). ASU 2020-4 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform on financial reporting. The amendments in ASU 2020-4 are effective as of March 12, 2020 through December 31, 2022. The Partnership does not expect the provisions of ASU 2020-4 will have a material impact on its consolidated financial statements and disclosures.

DISPOSITION

DISPOSITION	6 Months Ended
	Jun. 30, 2022
Discontinued Operations and Disposal Groups [Abstract]
DISPOSITION	3. DISPOSITION Lane G&P System. On June 30, 2022, the Partnership, completed the disposition of all the equity interests in Summit Permian, which owns the Lane Gathering and Processing System (“Lane G&P System”), to Longwood Gathering and Disposal Systems, LP (“Longwood”), a wholly owned subsidiary of Matador ͏Resources Company (“Matador”), for a cash sale price of $75.0 million. In connection with the transaction, the Partnership released to a subsidiary of Matador, and Matador agreed to assume, take or-pay firm capacity on the Double E Pipeline. The Partnership is the operator of the Double E joint venture and owns a 70% interest.

REVENUE

REVENUE	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
REVENUE	4. REVENUE The following table presents estimated revenue expected to be recognized during the remainder of 2022 and over the remaining contract period related to performance obligations that are unsatisfied and are comprised of estimated minimum volume commitments. (In thousands) 2022 2023 2024 2025 2026 Thereafter Gathering services and related fees $ 41,041 $ 63,214 $ 52,412 $ 35,805 $ 21,024 $ — Revenue by Category. In the following tables, revenue is disaggregated by geographic area and major products and services. For more detailed information about reportable segments, see Note 15 – Segment Information. Three Months Ended June 30, 2022 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 12,940 $ — $ — $ 12,940 Rockies 16,510 14,927 4,728 36,165 Permian 1,822 10,514 1,298 13,634 Piceance 19,981 2,067 1,276 23,324 Barnett 10,378 786 1,671 12,835 Total reportable segments 61,631 28,294 8,973 98,898 Corporate and other — (16) 181 165 Total $ 61,631 $ 28,278 $ 9,154 $ 99,063 Six Months Ended June 30, 2022 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 27,576 $ — $ — $ 27,576 Rockies 34,299 28,586 9,885 72,770 Permian 3,669 17,381 2,317 23,367 Piceance 40,052 3,962 2,551 46,565 Barnett 20,055 786 3,734 24,575 Total reportable segments 125,651 50,715 18,487 194,853 Corporate and other — 21 315 336 Total $ 125,651 $ 50,736 $ 18,802 $ 195,189 Three Months Ended June 30, 2021 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 17,961 $ — $ — $ 17,961 Rockies 18,407 8,506 6,098 33,011 Permian 2,262 6,875 1,049 10,186 Piceance 25,527 1,025 1,233 27,785 Barnett 10,076 10 1,012 11,098 Total reportable segments 74,233 16,416 9,392 100,041 Corporate and other — — — — Total $ 74,233 $ 16,416 $ 9,392 $ 100,041 Six Months Ended June 30, 2021 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 32,733 $ — $ — $ 32,733 Rockies 37,303 20,843 11,309 69,455 Permian 4,461 13,393 1,809 19,663 Piceance 50,311 2,878 2,409 55,598 Barnett 19,772 66 2,072 21,910 Total reportable segments 144,580 37,180 17,599 199,359 Corporate and other — — — — Total $ 144,580 $ 37,180 $ 17,599 $ 199,359 Contract balances. Contract assets relate to the Partnership’s rights to consideration for work completed but not billed at the reporting date and consist of the estimated MVC shortfall payments expected from its customers and unbilled activity associated with contributions in aid of construction. Contract assets are transferred to trade receivables when the rights become unconditional. The following table provides information about contract assets from contracts with customers: Total (In thousands) Contract assets, beginning balance December 31, 2021 $ 10,327 Additions 4,802 Transfers out (8,867) Contract assets, ending balance June 30, 2022 $ 6,262 As of June 30, 2022, receivables with customers totaled $49.9 million and contract assets totaled $6.3 million and are included in the accounts receivable caption on the unaudited condensed consolidated balance sheets. As of December 31, 2021, receivables with customers totaled $50.5 million and contract assets totaled $10.3 million and are included in the accounts receivable caption on the unaudited condensed consolidated balance sheets. Contract liabilities (deferred revenue) relate to the advance consideration received from customers primarily for contributions in aid of construction. The Partnership recognizes contract liabilities under these arrangements in revenue over the contract period. See Note 7 – Deferred Revenue for additional details.

PROPERTY, PLANT AND EQUIPMENT

PROPERTY, PLANT AND EQUIPMENT	6 Months Ended
	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT	5. PROPERTY, PLANT AND EQUIPMENT Details on the Partnership’s property, plant and equipment follow. June 30, 2022 December 31, 2021 (In thousands) Gathering and processing systems and related equipment $ 2,077,369 $ 2,225,267 Construction in progress 31,874 49,082 Land and line fill 10,212 10,644 Other 52,472 51,863 Total 2,171,927 2,336,856 Less: accumulated depreciation (640,477) (610,774) Property, plant and equipment, net $ 1,531,450 $ 1,726,082 Depreciation expense and capitalized interest for the Partnership follow. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands) Depreciation expense $ 23,714 $ 21,318 $ 47,762 $ 42,784 Capitalized interest 251 149 583 324

EQUITY METHOD INVESTMENTS

EQUITY METHOD INVESTMENTS	6 Months Ended
	Jun. 30, 2022
Equity Method Investments and Joint Ventures [Abstract]
EQUITY METHOD INVESTMENTS	6. EQUITY METHOD INVESTMENTS The Partnership has equity method investments in Double E and Ohio Gathering, the balances of which are included in the Investment in equity method investees caption on the unaudited condensed consolidated balance sheets. Details of the Partnership’s equity method investments follow. June 30, 2022 December 31, 2021 (In thousands) Double E $ 284,790 $ 280,952 Ohio Gathering 234,763 242,244 Total $ 519,553 $ 523,196

DEFERRED REVENUE

DEFERRED REVENUE	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
DEFERRED REVENUE	7. DEFERRED REVENUE Certain of the Partnership’s gathering and/or processing agreements provide for monthly or annual MVCs. The amount of the shortfall payment is based on the difference between the actual throughput volume shipped and/or processed for the applicable period and the MVC for the applicable period, multiplied by the applicable gathering or processing fee. Many of the Partnership’s gas gathering agreements contain provisions that can reduce or delay the cash flows that it expects to receive from MVCs to the extent that a customer's actual throughput volumes are above or below its MVC for the applicable contracted measurement period. The balances in deferred revenue as of June 30, 2022 and December 31, 2021 are primarily related to contributions in aid of construction which will be recognized as revenue over the life of the contract. A rollforward of current deferred revenue follows. Total (In thousands) Current deferred revenue, January 1, 2022 $ 10,374 Add: additions 2,509 Less: revenue recognized (3,163) Current deferred revenue, June 30, 2022 $ 9,720 A rollforward of noncurrent deferred revenue follows. Total (In thousands) Noncurrent deferred revenue, January 1, 2022 $ 42,570 Add: additions 269 Less: reclassification to current deferred revenue (2,477) Noncurrent deferred revenue, June 30, 2022 $ 40,362

DEBT

DEBT	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
DEBT	8. DEBT Debt for the Partnership at June 30, 2022 and December 31, 2021, follows: June 30, 2022 December 31, 2021 (In thousands) ABL Facility : Summit Holdings' asset based credit facility due May 1, 2026 $ 151,000 $ 267,000 Permian Transmission Credit Facility : Permian Transmission's variable rate senior secured credit facility due March 8, 2028 — 160,000 Permian Transmission Term Loan : Permian Transmission's variable rate senior secured term loan due March 8, 2028 157,758 — 2025 Senior Notes : Summit Holdings' 5.75% senior unsecured notes due April 15, 2025 259,463 259,463 2026 Secured Notes : Summit Holdings' and Finance Corp's 8.50% senior unsecured notes due October 15, 2026 700,000 700,000 Less: unamortized debt discount and debt issuance costs (28,183) (31,391) Total debt 1,240,038 1,355,072 Less: current portion (7,526) — Total long-term debt $ 1,232,512 $ 1,355,072 ABL Facility. On November 2, 2021, the Partnership, the Partnership’s subsidiary, Summit Holdings, and the subsidiaries of Summit Holdings party thereto entered into a first-lien, senior secured credit facility, consisting of a $400.0 million asset-based revolving credit facility (the “ABL Facility”), subject to a borrowing base comprised of a percentage of eligible accounts receivable of Summit Holdings and its subsidiaries that guarantee the ABL Facility (collectively, the “ABL Facility Subsidiary Guarantors”) and a percentage of eligible above-ground fixed assets including eligible compression units, processing plants, compression stations and related equipment of Summit Holdings and the ABL Facility Subsidiary Guarantors. As of June 30, 2022, the most recent borrowing base determination of eligible assets totaled $584.5 million, an amount greater than the $400.0 million of aggregate commitments. The ABL Facility will mature on May 1, 2026; provided that, (a) if the outstanding amount of the 2025 Senior Notes (or any permitted refinancing indebtedness in respect thereof that has a final maturity, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 120 days after the Termination Date (as defined in the ABL Agreement)) on such date equals or exceeds $50,000,000, then the ABL Facility will mature on December 13, 2024 and (b) if both (i) any amount of the 2025 Senior Notes (or any permitted refinancing indebtedness in respect thereof that has a final maturity, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 120 days after the Termination Date) is outstanding on such date and (ii) Liquidity (as defined in the ABL Agreement) is less than an amount equal to the sum of the then aggregate outstanding principal amount of the 2025 Senior Notes (or any permitted refinancing indebtedness in respect thereof that has a final maturity, scheduled amortization or any other scheduled repayment, mandatory prepayment, mandatory redemption or sinking fund obligation prior to the date that is 120 days after the Termination Date) plus the Threshold Amount (as defined in the ABL Agreement) on such date, then the ABL Facility will mature on January 14, 2025. As of June 30, 2022, the applicable margin under the adjusted LIBOR borrowings was 3.25%, the interest rate was 4.375% and the available borrowing capacity of the ABL Facility totaled $243.1 million after giving effect to the issuance of $5.9 million in outstanding but undrawn irrevocable standby letters of credit. The ABL Facility requires that Summit Holdings not permit (i) the First Lien Net Leverage Ratio (as defined in the ABL Agreement) as of the last day of any fiscal quarter to be greater than 2.50:1.00, or (ii) the Interest Coverage Ratio (as defined in the ABL Agreement) as of the last day of any fiscal quarter to be less than 2.00:1.00. As of June 30, 2022, the First Lien Net Leverage Ratio was 0.64:1.00 and the Interest Coverage Ratio was 2.73:1.00 As of June 30, 2022, the Partnership was in compliance with the financial covenants of the ABL Facility. Permian Transmission Credit Facility. On March 8, 2021 (the “Permian Closing Date”), the Partnership’s unrestricted subsidiary, Permian Transmission, entered into a Credit Agreement which provided for $175.0 million of senior secured credit facilities (the “Permian Transmission Credit Facilities”), including a $160.0 million Term Loan Facility and a $15.0 million Working Capital Facility. Borrowings from the Permian Transmission Credit Facilities were used to finance Permian Transmission’s capital calls associated with its investment in Double E. In January 2022, in accordance with the terms of Permian Transmission Credit Facilities, the Partnership converted the $160.0 million portion of the Permian Transmission Credit Facilities into a term loan facility (the “Permian Term Loan Facility”). As of June 30, 2022, the applicable margin under adjusted LIBOR borrowings was 2.375%, the interest rate was 3.4% and the available borrowing capacity of the Permian Transmission Credit Facility totaled $7.5 million, subject to a commitment fee of 0.7% after giving effect to the issuance of $7.5 million in outstanding but undrawn irrevocable standby letters of credit and surety bonds. As of June 30, 2022, the Partnership was in compliance with the financial covenants of the Permian Transmission Credit Facility. Permian Transmission Term Loan. As described above, in January 2022, the Permian Transmission Term Loan Facility was converted into a Term Loan (the “Permian Transmission Term Loan”). The Permian Transmission Term Loan is due on May 8, 2028. As of June 30, 2022, the applicable margin under adjusted LIBOR borrowings was 2.375% and the interest rate was 3.4%. As of June 30, 2022, the Partnership was in compliance with the financial covenants governing the Permian Transmission Term Loan. In accordance with the terms of the Permian Transmission Term Loan, Permian Transmission is required to make mandatory principal repayments. Below is a summary of the remaining mandatory principal repayments as of June 30, 2022: (In thousands) Total 2022 2023 2024 2025 2026 Thereafter Amortizing principal repayments $ 157,758 $ 2,405 $ 10,507 $ 15,524 $ 16,580 $ 16,967 $ 95,775 2026 Secured Notes. In November 2021, the Co-Issuers issued the 2026 Secured Notes. The 2026 Secured Notes are senior secured second lien notes due 2026. The 2026 Secured Notes will pay interest semi-annually in cash in arrears on April 15 and October 15 of each year, commencing on April 15, 2022, and will be jointly and severally guaranteed, on a senior second-priority secured basis (subject to permitted liens), by the Partnership and each restricted subsidiary of the Partnership (other than the Co-Issuers) that is an obligor under the ABL Agreement, or under the Co-Issuers’ 2025 Senior Notes on the issue date of the 2026 Secured Notes. The 2026 Secured Notes are effectively subordinated to any of our or the guarantors’ current and future secured first lien indebtedness, including indebtedness incurred under the ABL Facility, to the extent of the value of the collateral securing such indebtedness, and our and the guarantors’ current and future debt that is secured by liens on assets other than the collateral, to the extent of the value of such assets. The 2026 Secured Notes are structurally subordinated to all indebtedness and other liabilities of our subsidiaries that do not guarantee the 2026 Secured Notes. The 2026 Secured Notes are effectively equal to our and the guarantors’ obligations under any future second lien indebtedness and effectively senior to all of our future junior lien indebtedness and existing and future unsecured indebtedness, including our outstanding senior unsecured notes, to the extent of the value of the collateral, and senior to any of our future subordinated indebtedness. The 2026 Secured Notes will mature on October 15, 2026. Before October 15, 2023, the Co-Issuers may redeem the 2026 Secured Notes, in whole or in part, at a price equal to 100% of their principal amount, plus a make-whole premium, together with accrued and unpaid interest to, but not including the redemption date. On and after October 15, 2023, the Co-Issuers may redeem all or part of the 2026 Secured Notes at redemption prices (expressed as percentages of principal amount) equal to: (a) 104.250% for the twelve-month period beginning October 15, 2023; (b) 102.125% for the twelve-month period beginning October 15, 2024; and (c) 100.000% for the twelve-month period beginning on October 15, 2025 and at any time thereafter, in each case plus accrued and unpaid interest, if any, to, but not including, the redemption date. As of June 30, 2022, the Partnership was in compliance with the financial covenants governing its 2026 Secured Notes. 2025 Senior Notes. In February 2017, the Co-Issuers co-issued the 2025 Senior Notes. The 2025 Senior Notes will pay interest semi-annually in cash in arrears on April 15 and October 15 of each year. The 2025 Senior Notes are senior, unsecured obligations and rank equally in right of payment with all of the Partnership’s existing and future senior obligations. The 2025 Senior Notes are effectively subordinated in right of payment to all of the Partnership’s secured indebtedness, to the extent of the collateral securing such indebtedness. The Co-Issuers have the right to redeem all or part of the 2025 Senior Notes at a redemption price of 101.438% (with the redemption price declining to 100.00% on April 15, 2023 and thereafter), plus accrued and unpaid interest, if any, to, but not including the redemption date. As of June 30, 2022, the Partnership was in compliance with the financial covenants governing its 2025 Senior Notes.

FINANCIAL INSTRUMENTS

FINANCIAL INSTRUMENTS	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
FINANCIAL INSTRUMENTS	9. FINANCIAL INSTRUMENTS Fair Value. A summary of the estimated fair value of our financial instruments follows. June 30, 2022 December 31, 2021 Carrying Value (1) Estimated Carrying Value (1) Estimated (In thousands) 2025 Senior Notes $ 259,463 $ 203,354 $ 259,463 $ 234,814 2026 Secured Notes 700,000 628,250 700,000 718,083 ________ (1) Excludes applicable unamortized debt issuance costs and debt discounts. The carrying values on the balance sheets of the ABL Facility and Permian Transmission Term Loan represents their fair value due to its floating interest rate. The fair values of the 2026 Secured Notes and 2025 Senior Notes are based on an average of nonbinding broker quotes as of June 30, 2022 and December 31, 2021. The use of different market assumptions or valuation methodologies may have a material effect on their estimated fair value. Interest Rate Swaps. In connection with the Permian Transmission Term Loan, formerly the Permian Transmission Credit Facility, the Partnership entered into amortizing interest rate swap agreements. As of June 30, 2022 and December 31, 2021, the outstanding notional amounts of interest rate swaps were $142.0 million and $144.0 million, respectively. These interest rate swaps manage exposure to variability in expected cash flows attributable to interest rate risk. Interest rate swaps convert a portion of the Partnership’s variable rate debt to fixed rate debt. The Partnership chooses counterparties for its derivative instruments that it believes are creditworthy at the time the transactions are entered into, and the Partnership actively monitors the creditworthiness where applicable. However, there can be no assurance that a counterparty will be able to meet its obligations to the Partnership. The Partnership presents its derivative positions on a gross basis and does not net the asset and liability positions.

PARTNERS' CAPITAL AND MEZZANINE

PARTNERS' CAPITAL AND MEZZANINE CAPITAL	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
PARTNERS' CAPITAL AND MEZZANINE CAPITAL	10. PARTNERS' CAPITAL AND MEZZANINE CAPITAL Common Units. A rollforward of the number of issued and outstanding common limited partner units follows for the period from December 31, 2021 to June 30, 2022. Common Units Units, December 31, 2021 7,169,834 2022 Preferred Exchange Offer, net of units withheld for taxes 2,853,875 Common units issued for SMLP LTIP, net 142,466 Units, June 30, 2022 10,166,175 Series A Preferred Units. As of June 30, 2022, the Partnership had 65,508 Series A Preferred Units outstanding and $17.4 million of accrued and unpaid distributions on its Series A Preferred Units. Series A Preferred Unit Exchange Offers. In January 2022, the Partnership completed an offer to exchange its Series A Preferred Units for newly issued common units (the “2022 Preferred Exchange Offer”), whereby it issued 2,853,875 SMLP common units, net of units withheld for withholding taxes, in exchange for 77,939 Series A Preferred Units. As a result of the transaction, the Partnership recognized a deemed contribution of $20.9 million from the Series A Preferred Unit holders to the common unit holders. In April 2021, the Partnership completed an offer to exchange its Series A Preferred Units for newly issued common units (the “2021 Preferred Exchange Offer”), whereby it issued 538,715 SMLP common units, net of units withheld for withholding taxes, in exchange for 18,662 Series A Preferred Units. As a result of the transaction, the Partnership recognized a deemed contribution of $8.3 million from the Series A Preferred Unit holders to the common unit holders. Subsidiary Series A Preferred Units. The Partnership records its Subsidiary Series A Preferred Units at fair value upon issuance, net of issuance costs, and subsequently records an effective interest method accretion amount each reporting period to accrete the carrying value to a most probable redemption value that is based on a predetermined internal rate of return measure. If the Partnership elects to make payment-in-kind (“PIK”) distributions to holders of its Subsidiary Series A Preferred Units, these PIK distributions increase the liquidation preference on each Subsidiary Series A Preferred Unit. Net Income (Loss) attributable to our common units includes adjustments for PIK distributions and redemption accretion. During the six months ended June 30, 2022, the Partnership accrued a $1.6 million of cash distribution, which was paid in July 2022, and elected to make PIK distributions, issuing 1,600 Subsidiary Series A Preferred Units, to the holders of its Subsidiary Series A Preferred Units. As of June 30, 2022, the Partnership had 93,039 Subsidiary Series A Preferred Units issued and outstanding. If the Subsidiary Series A Preferred Units were redeemed on June 30, 2022, the redemption amount would be $117.6 million when considering the applicable multiple of invested capital metric and make-whole amount provisions contained in the Subsidiary Series A Preferred Unit agreement. The following table shows the change in our Subsidiary Series A Preferred Unit balance from January 1, 2022 to June 30, 2022, net of $2.5 million and $3.9 million of unamortized issuance costs at June 30, 2022 and December 31, 2021, respectively: (In thousands) Balance at December 31, 2021 $ 106,325 PIK distributions 1,600 Redemption accretion, net of issuance cost amortization 7,277 Cash distribution (1,628) Balance at June 30, 2022 $ 113,574 Warrants. On May 28, 2020, and in connection with the GP Buy-In Transaction, the Partnership issued (i) a warrant to purchase up to 537,307 SMLP common units (8,059,609 SMLP common units prior to the Reverse Unit Split) to SMP TopCo, LLC, a Delaware limited liability company and affiliate of ECP (“ECP NewCo”) (the “ECP NewCo Warrant”), and (ii) a warrant to purchase up to 129,360 SMLP common units (1,940,391 SMLP common units prior to the Reverse Unit Split) to SMLP Holdings, LLC, a Delaware limited liability company and affiliate of ECP (“ECP Holdings” and together with ECP NewCo, the "ECP Entities") (the “ECP Holdings Warrant” and together with the ECP NewCo Warrant, the “ECP Warrants”). On August 5, 2021, the ECP Entities cashlessly exercised all of the ECP Warrants for an aggregate of 414,447 SMLP common units, net of the exercise price, as calculated pursuant to Section 3(c) of the ECP Warrants (the "ECP Warrant Exercise"). Cash Distribution Policy. In connection with the GP Buy-In Transaction, the Partnership suspended its cash distributions to holders of its common units, commencing with respect to the quarter ended March 31, 2020. Upon the resumption of distributions, the Partnership Agreement requires that it distribute all available cash, subject to reserves established by its General Partner, within 45 days after the end of each quarter to unitholders of record on the applicable record date. The amount of distributions paid under this policy is subject to fluctuations based on the amount of cash the Partnership generates from its business and the decision to make any distribution is determined by the General Partner, taking into consideration the terms of the Partnership Agreement. There were no distributions paid during the three and six months ended June 30, 2022 or during the twelve months ended December 31, 2021.

EARNINGS PER UNIT

EARNINGS PER UNIT	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
EARNINGS PER UNIT	11. EARNINGS PER UNIT The following table details the components of EPU. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands, except per-unit amounts) Numerator for basic and diluted EPU: Allocation of net loss among limited partner interests: Net loss $ (91,804) $ (19,738) $ (91,809) $ (10,750) Net income attributable to Subsidiary Series A Preferred Units (3,164) (4,089) (8,877) (8,021) Net loss attributable to Summit Midstream Partners, LP $ (94,968) $ (23,827) $ (100,686) (18,771) Less: Net income attributable to Series A Preferred Units $ (1,888) $ (3,849) $ (4,108) (8,136) Add: Deemed capital contribution from 2022 Preferred Exchange Offer — — 20,974 — Add: Deemed capital contribution from 2021 Preferred Exchange Offer $ — $ 8,326 $ — $ 8,326 Net loss attributable to common limited partners $ (96,856) $ (19,350) $ (83,820) $ (18,581) Denominator for basic and diluted EPU: Weighted-average common units outstanding – basic 10,166 6,656 9,919 6,392 Effect of nonvested phantom units — — — — Weighted-average common units outstanding – diluted 10,166 6,656 9,919 6,392 Net income per limited partner unit: Common unit – basic $ (9.53) $ (2.91) $ (8.45) $ (2.91) Common unit – diluted $ (9.53) $ (2.91) $ (8.45) $ (2.91) Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU — 169 — 173

SUPPLEMENTAL CASH FLOW INFORMAT

SUPPLEMENTAL CASH FLOW INFORMATION	6 Months Ended
	Jun. 30, 2022
Supplemental Cash Flow Elements [Abstract]
SUPPLEMENTAL CASH FLOW INFORMATION	12. SUPPLEMENTAL CASH FLOW INFORMATION Six Months Ended June 30, 2022 2021 (In thousands) Supplemental cash flow information: Cash interest paid $ 42,039 $ 27,869 Cash paid for taxes $ 149 $ 15 Noncash investing and financing activities: Capital expenditures in trade accounts payable (period-end accruals) $ 3,738 $ 6,059 Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization $ 7,277 $ 5,008 2022 Preferred Exchange Offer $ 92,587 $ — 2021 Preferred Exchange Offer $ — $ 20,654

UNIT-BASED AND NONCASH COMPENSA

UNIT-BASED AND NONCASH COMPENSATION	6 Months Ended
	Jun. 30, 2022
Share-Based Payment Arrangement [Abstract]
UNIT-BASED AND NONCASH COMPENSATION	13. UNIT-BASED AND NONCASH COMPENSATION SMLP Long-Term Incentive Plan. The Partnership’s Long-Term Incentive Plan (“SMLP LTIP”) provides for equity awards to eligible officers, employees, consultants and directors of the Partnership, thereby linking the recipients’ compensation directly to SMLP’s performance. Significant items to note: • For the six-month period ended June 30, 2022, the Partnership granted 146,529 phantom units and associated distribution equivalent rights to employees in connection with the Partnership’s annual incentive compensation award cycle. These awards had a grant date fair value of $14.21 per common unit and vest ratably over a 3-year period. • For the six-month period ended June 30, 2022, the Partnership issued 38,664 common units to the Partnership’s six independent directors in connection with their annual compensation plan. These awards had a grant date fair value of $14.21 per common unit and vested immediately. • On June 24, 2022, unitholders of the Partnership approved the Summit Midstream Partners, LP 2022 Long-Term Incentive Plan, which increased the number of common units available for issuance to the Partnership’s employees, consultants and directors. As of June 30, 2022, approximately 1.2 million common units remained available for future issuance under the SMLP LTIP, which includes the impact of 0.3 million granted but unvested phantom units.

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	14. COMMITMENTS AND CONTINGENCIES Environmental Matters. Although the Partnership believes that it is in material compliance with applicable environmental regulations, the risk of environmental remediation costs and liabilities are inherent in pipeline ownership and operation. Furthermore, the Partnership can provide no assurances that significant environmental remediation costs and liabilities will not be incurred in the future. The Partnership is currently not aware of any material contingent liabilities that exist with respect to environmental matters, except as noted below. As of June 30, 2022, the Partnership has recognized (i) a current liability for remediation effort expenditures expected to be incurred within the next 12 months and (ii) a noncurrent liability for estimated remediation expenditures expected to be incurred subsequent to June 30, 2023. Each of these amounts represent the Partnership’s best estimate for costs expected to be incurred. Neither of these amounts have been discounted to their present value. A rollforward of the Partnership’s undiscounted accrued environmental remediation follows and is primarily related to the 2015 Blacktail Release and other environmental remediation activities, as detailed below. (In thousands) Accrued environmental remediation, December 31, 2021 $ 5,606 Payments made (1,883) Changes in estimates 657 Accrued environmental remediation, June 30, 2022 $ 4,380 In 2015, the Partnership learned of the rupture of a four-inch produced water gathering pipeline on the Meadowlark Midstream system near Williston, North Dakota (“2015 Blacktail Release”). On August 4, 2021, subsidiaries of the Partnership entered into the following agreements to resolve the U.S. federal and North Dakota state governments’ environmental claims with respect to the 2015 Blacktail Release: (i) a Consent Decree with the U.S. Department of Justice (“DOJ”), the U.S. Environmental Protection Agency (“EPA”), and the State of North Dakota (“Consent Decree”); (ii) a Plea Agreement with the United States (“Plea Agreement”); and (iii) a Consent Agreement with the North Dakota Industrial Commission (“Consent Agreement” together with the Consent Decree and Plea Agreement, the “Global Settlement”). As of June 30, 2022 and December 31, 2021, the accrued loss liability for the 2015 Blacktail Release was $33.2 million. Key terms of the Global Settlement included (i) payment of penalties and fines totaling $36.3 million, consisting of $1.25 million in natural resource damages payable to federal and state governments, a $25.0 million payable to the federal government over 5 years, and a $10.0 million payable to state governments over six years, with interest applied to unpaid amounts accruing at a fixed rate of 3.25%, and of which $5.6 million is expected to be paid within the next twelve months; (ii) continuation of remediation efforts at the site of the 2015 Blacktail Release; (iii) other injunctive relief including but not limited to control room management, environmental management system audit, training, and reporting; (iv) guilty pleas by Defendant subsidiary for (a) one charge of negligent discharge of a harmful quantity of oil and (b) one charge of knowing failure to immediately report a discharge of oil; and (v) organizational probation for a minimum period of three years from sentencing, including payment in full of certain components of the fines and penalty amounts. The agreements comprising the Global Settlement were subject to the approval of the U.S. District Court for the District of North Dakota (the “U.S. District Court”). The U.S. District Court entered an order making the civil components of the Global Settlement effective on September 28, 2021 and accepted the sentencing in the Plea Agreement on December 6, 2021, completing approval of the Global Settlement. In conjunction with the criminal proceedings under the Plea Agreement, the U.S. District Court received two claims for restitution, including claims for diminution in property value and the cost of additional environmental testing. The prosecution notified the U.S District Court that the government declined to support the claims, citing “insufficient evidence to support the claims.” Defendant subsidiary of the Partnership has responded that restitution is not applicable in this matter because claimants did not provide any supporting evidence for their claims that showed any harm, and because the plea agreement in this matter does not permit restitution sought by the claimants. On August 4, 2022, the U.S. District Court denied the claims. Subsidiaries of the Partnership are also participating in two proceedings before the EPA as a result of the Plea Agreement becoming effective. Following the U.S. District Court’s entering judgment on Defendant subsidiary’s guilty plea to one count of negligent discharge of produced water in violation of the Clean Water Act, Defendant subsidiary was statutorily debarred by operation of law pursuant to 33 U.S.C. § 1368(a) to participate in federal awards performed at the “violating facility,” which EPA determined to be the Marmon subsystem of the produced water gathering system in North Dakota. Defendant has submitted a petition for reinstatement, which was denied by the EPA’s suspension and debarment office (“SDO”) on July 11, 2022. The SDO determined that the term of probation in the Plea Agreement was the appropriate period of time to demonstrate Defendant subsidiary’s change of corporate attitude, policies, practices, and procedures. The Partnership and certain subsidiaries have also received a show cause notice from the EPA requesting us to “show cause” why SDO should not issue a Notice of Proposed Debarment to the Defendant subsidiary and certain affiliates under 2 C.F.R. § 180.800(d), to which we have responded. Legal Proceedings. The Partnership is involved in various litigation and administrative proceedings arising in the ordinary course of business. In the opinion of management, any liabilities that may result from these claims or those arising in the ordinary course of business would not individually or in the aggregate have a material adverse effect on the Partnership's financial position or results of operations.

SEGMENT INFORMATION

SEGMENT INFORMATION	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
SEGMENT INFORMATION	15. SEGMENT INFORMATION In accordance with ASC No. 280 - Segment Reporting, the Partnership routinely evaluates whether its reportable segments have changed. In the fourth quarter of 2021, the Partnership changed its segment reporting to align with how the General Partner’s Chief Executive Officer, its chief operating decision maker, reviews financial information in order to allocate resources and assess performance. The new segment reporting as of December 31, 2021, resulted from changes enacted to optimize commercial efforts and geographic workforce in order to better align its commercial, engineering, and operational capabilities. As a result of the revised reportable segment structure, the Partnership has recast the corresponding segment information for all periods presented. As of June 30, 2022, the Partnership’s reportable segments are: • Rockies – Includes the Partnership’s wholly owned midstream assets located in the Williston Basin and the DJ Basin. • Permian – Includes the Partnership’s equity method investment in Double E and its wholly owned Lane G&P System, which was sold on June 30, 2022 to Matador. For additional information regarding the sale of the Lane G&P System, see Note 3 - Disposition. • Northeast – Includes the Partnership’s wholly owned midstream assets located in the Utica and Marcellus shale plays and the equity method investment in Ohio Gathering that is focused on the Utica Shale. • Piceance – Includes the Partnership’s wholly owned midstream assets located in the Piceance Basin. • Barnett – Includes the Partnership’s wholly owned midstream assets located in the Barnett Shale. Corporate and Other represents those results that: (i) are not specifically attributable to a reportable segment; (ii) are not individually reportable; or (iii) have not been allocated to a reportable segment for the purpose of evaluating their performance, including certain general and administrative expense items, certain natural gas and crude oil marketing services and transaction costs. Assets by reportable segment follow. June 30, 2022 December 31, 2021 (In thousands) Assets: Northeast $ 610,167 $ 623,224 Rockies 576,087 592,148 Permian 300,994 458,988 Piceance 501,137 524,218 Barnett 305,855 315,055 Total reportable segment assets 2,294,240 2,513,633 Corporate and Other 16,093 8,829 Total assets $ 2,310,333 $ 2,522,462 Segment adjusted EBITDA by reportable segment follows. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands) Reportable segment adjusted EBITDA Northeast $ 18,568 $ 23,361 $ 38,636 $ 43,554 Rockies 13,899 14,732 29,729 30,884 Permian 4,817 1,341 8,966 2,592 Piceance 15,350 20,324 31,118 41,358 Barnett 7,247 8,889 16,533 16,905 Total of reportable segments' measures of profit $ 59,881 $ 68,647 $ 124,982 $ 135,293 A reconciliation of income or loss before income taxes and income from equity method investees to total of reportable segments' measures of profit follows. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands) Reconciliation of income (loss) before income taxes and income from equity method investees to total of reportable segments' measures of profit: Income (loss) before income taxes and income from equity method investees $ (95,872) $ (22,290) $ (99,862) $ (15,631) Add: Corporate and Other expense 5,809 41,144 9,627 49,482 Interest expense 24,887 15,502 49,050 29,455 Depreciation and amortization (1) 30,346 28,598 61,025 57,344 Proportional adjusted EBITDA for equity method investees 11,406 6,841 21,858 13,713 Adjustments related to capital reimbursement activity (1,578) (2,225) (3,306) (3,470) Unit-based and noncash compensation 582 1,048 2,272 3,015 Gain on asset sales, net (313) (4) (310) (140) Long-lived asset impairment 84,614 33 84,628 1,525 Total of reportable segments' measures of profit $ 59,881 $ 68,647 $ 124,982 $ 135,293 ________ (1) Includes the amortization expense associated with our favorable gas gathering contracts as reported in other revenues.

SUMMARY OF SIGNIFICANT ACCOUN_2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND RECENTLY ISSUED ACCOUNTING STANDARDS APPLICABLE TO THE PARTNERSHIP (Policies)	6 Months Ended
	Jun. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	The Partnership prepares its condensed consolidated financial statements in accordance with GAAP as established by the FASB and pursuant to the rules and regulations of the SEC pertaining to interim financial information. The unaudited condensed consolidated financial statements contained in this report include all normal and recurring material adjustments that, in the opinion of management, are necessary for a fair statement of the financial position, results of operations and cash flows for the interim periods presented herein.
Use of Estimates	The Partnership makes estimates and assumptions that affect the reported amounts of assets and liabilities at the balance sheet dates, including fair value measurements, the reported amounts of revenues and expenses and the disclosure of commitments and contingencies. Although management believes these estimates are reasonable, actual results could differ from its estimates.
Consolidation	The unaudited condensed consolidated financial statements contained in this report include the assets, liabilities and results of operations of SMLP and its subsidiaries. All intercompany transactions among the consolidated entities have been eliminated in consolidation. Comprehensive income or loss is the same as net income or loss for all periods presented.
New accounting standards not yet implemented	New accounting standards not yet implemented. ASU No. 2020-6 Debt – Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging – Contracts in Entity’s Own Equity (Subtopic 815–40) (“ASU 2020-6”). ASU 2020-6 simplifies the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts on an entity’s own equity. The ASU is part of the FASB’s simplification initiative, which aims to reduce unnecessary complexity in GAAP. The ASU’s amendments are effective for fiscal years beginning after December 15, 2023, and interim periods within those fiscal years. The Partnership is currently evaluating the provisions of ASU 2020-6 to determine its impact on the Partnership’s consolidated financial statements and disclosures. ASU No. 2020-4 Reference Rate Reform (“ASU 2020-4”). ASU 2020-4 provides optional expedients and exceptions for applying GAAP to contracts, hedging relationships and other transactions affected by reference rate reform on financial reporting. The amendments in ASU 2020-4 are effective as of March 12, 2020 through December 31, 2022. The Partnership does not expect the provisions of ASU 2020-4 will have a material impact on its consolidated financial statements and disclosures.

REVENUE (Tables)

REVENUE (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Schedule of Estimated Revenue Expected to be Recognized and MVC Shortfall Payments	The following table presents estimated revenue expected to be recognized during the remainder of 2022 and over the remaining contract period related to performance obligations that are unsatisfied and are comprised of estimated minimum volume commitments. (In thousands) 2022 2023 2024 2025 2026 Thereafter Gathering services and related fees $ 41,041 $ 63,214 $ 52,412 $ 35,805 $ 21,024 $ —
Schedule of Disaggregated Revenue by Geographic Area and Major Products and Services Reportable Segments	Revenue by Category. In the following tables, revenue is disaggregated by geographic area and major products and services. For more detailed information about reportable segments, see Note 15 – Segment Information. Three Months Ended June 30, 2022 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 12,940 $ — $ — $ 12,940 Rockies 16,510 14,927 4,728 36,165 Permian 1,822 10,514 1,298 13,634 Piceance 19,981 2,067 1,276 23,324 Barnett 10,378 786 1,671 12,835 Total reportable segments 61,631 28,294 8,973 98,898 Corporate and other — (16) 181 165 Total $ 61,631 $ 28,278 $ 9,154 $ 99,063 Six Months Ended June 30, 2022 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 27,576 $ — $ — $ 27,576 Rockies 34,299 28,586 9,885 72,770 Permian 3,669 17,381 2,317 23,367 Piceance 40,052 3,962 2,551 46,565 Barnett 20,055 786 3,734 24,575 Total reportable segments 125,651 50,715 18,487 194,853 Corporate and other — 21 315 336 Total $ 125,651 $ 50,736 $ 18,802 $ 195,189 Three Months Ended June 30, 2021 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 17,961 $ — $ — $ 17,961 Rockies 18,407 8,506 6,098 33,011 Permian 2,262 6,875 1,049 10,186 Piceance 25,527 1,025 1,233 27,785 Barnett 10,076 10 1,012 11,098 Total reportable segments 74,233 16,416 9,392 100,041 Corporate and other — — — — Total $ 74,233 $ 16,416 $ 9,392 $ 100,041 Six Months Ended June 30, 2021 Gathering services and related fees Natural gas, NGLs and condensate sales Other revenues Total (In thousands) Reportable Segments: Northeast $ 32,733 $ — $ — $ 32,733 Rockies 37,303 20,843 11,309 69,455 Permian 4,461 13,393 1,809 19,663 Piceance 50,311 2,878 2,409 55,598 Barnett 19,772 66 2,072 21,910 Total reportable segments 144,580 37,180 17,599 199,359 Corporate and other — — — — Total $ 144,580 $ 37,180 $ 17,599 $ 199,359
Schedule of Information about Contract Assets from Contracts with Customers	The following table provides information about contract assets from contracts with customers: Total (In thousands) Contract assets, beginning balance December 31, 2021 $ 10,327 Additions 4,802 Transfers out (8,867) Contract assets, ending balance June 30, 2022 $ 6,262

PROPERTY, PLANT AND EQUIPMENT (

PROPERTY, PLANT AND EQUIPMENT (Tables)	6 Months Ended
	Jun. 30, 2022
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Details on the Partnership’s property, plant and equipment follow. June 30, 2022 December 31, 2021 (In thousands) Gathering and processing systems and related equipment $ 2,077,369 $ 2,225,267 Construction in progress 31,874 49,082 Land and line fill 10,212 10,644 Other 52,472 51,863 Total 2,171,927 2,336,856 Less: accumulated depreciation (640,477) (610,774) Property, plant and equipment, net $ 1,531,450 $ 1,726,082
Schedule Of Depreciation Expense And Capitalized Interest Costs	Depreciation expense and capitalized interest for the Partnership follow. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands) Depreciation expense $ 23,714 $ 21,318 $ 47,762 $ 42,784 Capitalized interest 251 149 583 324

EQUITY METHOD INVESTMENTS (Tabl

EQUITY METHOD INVESTMENTS (Tables)	6 Months Ended
	Jun. 30, 2022
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Details of the Partnership’s equity method investments follow. June 30, 2022 December 31, 2021 (In thousands) Double E $ 284,790 $ 280,952 Ohio Gathering 234,763 242,244 Total $ 519,553 $ 523,196

DEFERRED REVENUE (Tables)

DEFERRED REVENUE (Tables)	6 Months Ended
	Jun. 30, 2022
Revenue from Contract with Customer [Abstract]
Contract with Customer, Contract Asset, Contract Liability, and Receivable	A rollforward of current deferred revenue follows. Total (In thousands) Current deferred revenue, January 1, 2022 $ 10,374 Add: additions 2,509 Less: revenue recognized (3,163) Current deferred revenue, June 30, 2022 $ 9,720 A rollforward of noncurrent deferred revenue follows. Total (In thousands) Noncurrent deferred revenue, January 1, 2022 $ 42,570 Add: additions 269 Less: reclassification to current deferred revenue (2,477) Noncurrent deferred revenue, June 30, 2022 $ 40,362

DEBT (Tables)

DEBT (Tables)	6 Months Ended
	Jun. 30, 2022
Debt Disclosure [Abstract]
Schedule of Debt	Debt for the Partnership at June 30, 2022 and December 31, 2021, follows: June 30, 2022 December 31, 2021 (In thousands) ABL Facility : Summit Holdings' asset based credit facility due May 1, 2026 $ 151,000 $ 267,000 Permian Transmission Credit Facility : Permian Transmission's variable rate senior secured credit facility due March 8, 2028 — 160,000 Permian Transmission Term Loan : Permian Transmission's variable rate senior secured term loan due March 8, 2028 157,758 — 2025 Senior Notes : Summit Holdings' 5.75% senior unsecured notes due April 15, 2025 259,463 259,463 2026 Secured Notes : Summit Holdings' and Finance Corp's 8.50% senior unsecured notes due October 15, 2026 700,000 700,000 Less: unamortized debt discount and debt issuance costs (28,183) (31,391) Total debt 1,240,038 1,355,072 Less: current portion (7,526) — Total long-term debt $ 1,232,512 $ 1,355,072
Schedule of Maturities of Long-term Debt	Below is a summary of the remaining mandatory principal repayments as of June 30, 2022: (In thousands) Total 2022 2023 2024 2025 2026 Thereafter Amortizing principal repayments $ 157,758 $ 2,405 $ 10,507 $ 15,524 $ 16,580 $ 16,967 $ 95,775

FINANCIAL INSTRUMENTS (Tables)

FINANCIAL INSTRUMENTS (Tables)	6 Months Ended
	Jun. 30, 2022
Fair Value Disclosures [Abstract]
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments	A summary of the estimated fair value of our financial instruments follows. June 30, 2022 December 31, 2021 Carrying Value (1) Estimated Carrying Value (1) Estimated (In thousands) 2025 Senior Notes $ 259,463 $ 203,354 $ 259,463 $ 234,814 2026 Secured Notes 700,000 628,250 700,000 718,083 ________ (1) Excludes applicable unamortized debt issuance costs and debt discounts.

PARTNERS' CAPITAL AND MEZZANI_2

PARTNERS' CAPITAL AND MEZZANINE CAPITAL (Tables)	6 Months Ended
	Jun. 30, 2022
Equity [Abstract]
Schedule Of Partner Units Activity	A rollforward of the number of issued and outstanding common limited partner units follows for the period from December 31, 2021 to June 30, 2022. Common Units Units, December 31, 2021 7,169,834 2022 Preferred Exchange Offer, net of units withheld for taxes 2,853,875 Common units issued for SMLP LTIP, net 142,466 Units, June 30, 2022 10,166,175
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net	The following table shows the change in our Subsidiary Series A Preferred Unit balance from January 1, 2022 to June 30, 2022, net of $2.5 million and $3.9 million of unamortized issuance costs at June 30, 2022 and December 31, 2021, respectively: (In thousands) Balance at December 31, 2021 $ 106,325 PIK distributions 1,600 Redemption accretion, net of issuance cost amortization 7,277 Cash distribution (1,628) Balance at June 30, 2022 $ 113,574

EARNINGS PER UNIT (Tables)

EARNINGS PER UNIT (Tables)	6 Months Ended
	Jun. 30, 2022
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table details the components of EPU. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands, except per-unit amounts) Numerator for basic and diluted EPU: Allocation of net loss among limited partner interests: Net loss $ (91,804) $ (19,738) $ (91,809) $ (10,750) Net income attributable to Subsidiary Series A Preferred Units (3,164) (4,089) (8,877) (8,021) Net loss attributable to Summit Midstream Partners, LP $ (94,968) $ (23,827) $ (100,686) (18,771) Less: Net income attributable to Series A Preferred Units $ (1,888) $ (3,849) $ (4,108) (8,136) Add: Deemed capital contribution from 2022 Preferred Exchange Offer — — 20,974 — Add: Deemed capital contribution from 2021 Preferred Exchange Offer $ — $ 8,326 $ — $ 8,326 Net loss attributable to common limited partners $ (96,856) $ (19,350) $ (83,820) $ (18,581) Denominator for basic and diluted EPU: Weighted-average common units outstanding – basic 10,166 6,656 9,919 6,392 Effect of nonvested phantom units — — — — Weighted-average common units outstanding – diluted 10,166 6,656 9,919 6,392 Net income per limited partner unit: Common unit – basic $ (9.53) $ (2.91) $ (8.45) $ (2.91) Common unit – diluted $ (9.53) $ (2.91) $ (8.45) $ (2.91) Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU — 169 — 173

SUPPLEMENTAL CASH FLOW INFORM_2

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2022
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Flow, Supplemental Disclosures	Six Months Ended June 30, 2022 2021 (In thousands) Supplemental cash flow information: Cash interest paid $ 42,039 $ 27,869 Cash paid for taxes $ 149 $ 15 Noncash investing and financing activities: Capital expenditures in trade accounts payable (period-end accruals) $ 3,738 $ 6,059 Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization $ 7,277 $ 5,008 2022 Preferred Exchange Offer $ 92,587 $ — 2021 Preferred Exchange Offer $ — $ 20,654

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Tables)	6 Months Ended
	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Schedule of Accrued Environmental Remediation	A rollforward of the Partnership’s undiscounted accrued environmental remediation follows and is primarily related to the 2015 Blacktail Release and other environmental remediation activities, as detailed below. (In thousands) Accrued environmental remediation, December 31, 2021 $ 5,606 Payments made (1,883) Changes in estimates 657 Accrued environmental remediation, June 30, 2022 $ 4,380

SEGMENT INFORMATION (Tables)

SEGMENT INFORMATION (Tables)	6 Months Ended
	Jun. 30, 2022
Segment Reporting [Abstract]
Reconciliation of Assets from Segment to Consolidated	Assets by reportable segment follow. June 30, 2022 December 31, 2021 (In thousands) Assets: Northeast $ 610,167 $ 623,224 Rockies 576,087 592,148 Permian 300,994 458,988 Piceance 501,137 524,218 Barnett 305,855 315,055 Total reportable segment assets 2,294,240 2,513,633 Corporate and Other 16,093 8,829 Total assets $ 2,310,333 $ 2,522,462
Reconciliation of Revenue from Segments to Consolidated	Segment adjusted EBITDA by reportable segment follows. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands) Reportable segment adjusted EBITDA Northeast $ 18,568 $ 23,361 $ 38,636 $ 43,554 Rockies 13,899 14,732 29,729 30,884 Permian 4,817 1,341 8,966 2,592 Piceance 15,350 20,324 31,118 41,358 Barnett 7,247 8,889 16,533 16,905 Total of reportable segments' measures of profit $ 59,881 $ 68,647 $ 124,982 $ 135,293
Reconciliation Of Net Income To Adjusted EBITDA	A reconciliation of income or loss before income taxes and income from equity method investees to total of reportable segments' measures of profit follows. Three Months Ended June 30, Six Months Ended June 30, 2022 2021 2022 2021 (In thousands) Reconciliation of income (loss) before income taxes and income from equity method investees to total of reportable segments' measures of profit: Income (loss) before income taxes and income from equity method investees $ (95,872) $ (22,290) $ (99,862) $ (15,631) Add: Corporate and Other expense 5,809 41,144 9,627 49,482 Interest expense 24,887 15,502 49,050 29,455 Depreciation and amortization (1) 30,346 28,598 61,025 57,344 Proportional adjusted EBITDA for equity method investees 11,406 6,841 21,858 13,713 Adjustments related to capital reimbursement activity (1,578) (2,225) (3,306) (3,470) Unit-based and noncash compensation 582 1,048 2,272 3,015 Gain on asset sales, net (313) (4) (310) (140) Long-lived asset impairment 84,614 33 84,628 1,525 Total of reportable segments' measures of profit $ 59,881 $ 68,647 $ 124,982 $ 135,293 ________ (1) Includes the amortization expense associated with our favorable gas gathering contracts as reported in other revenues.

DISPOSITION (Details)

DISPOSITION (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Lane G&P System, net of cash sold in transaction		$ 75,520	$ 0
Double E
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Percentage of ownership interest	70%	70%
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Lane G&P System
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash sale price	$ 75,000	$ 75,000
Impairment on disposition	84,500
Proceeds from sale of Lane G&P System, net of cash sold in transaction	77,500
Cash sold, working capital and other miscellaneous adjustments	2,000
Net book value of assets and liabilities divested	160,800	$ 160,800
Other costs to sell	$ 1,200

REVENUE - Schedule of Estimated

REVENUE - Schedule of Estimated Revenue Expected to be Recognized (Details) - Gathering services and related fees $ in Thousands	Jun. 30, 2022 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 41,041
Revenue, remaining performance obligation, expected timing of satisfaction	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 63,214
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 52,412
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 35,805
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 21,024
Revenue, remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, remaining performance obligation, amount	$ 0
Revenue, remaining performance obligation, expected timing of satisfaction	1 year

REVENUE - Schedule of Disaggreg

REVENUE - Schedule of Disaggregated Revenue by Geographic Area and Major Products and Services Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenues	$ 99,063	$ 100,041	$ 195,189	$ 199,359
Reportable Segments
Disaggregation of Revenue [Line Items]
Total revenues	98,898	100,041	194,853	199,359
Reportable Segments | Northeast
Disaggregation of Revenue [Line Items]
Total revenues	12,940	17,961	27,576	32,733
Reportable Segments | Rockies
Disaggregation of Revenue [Line Items]
Total revenues	36,165	33,011	72,770	69,455
Reportable Segments | Permian
Disaggregation of Revenue [Line Items]
Total revenues	13,634	10,186	23,367	19,663
Reportable Segments | Piceance
Disaggregation of Revenue [Line Items]
Total revenues	23,324	27,785	46,565	55,598
Reportable Segments | Barnett
Disaggregation of Revenue [Line Items]
Total revenues	12,835	11,098	24,575	21,910
Segment Reconciling Items
Disaggregation of Revenue [Line Items]
Total revenues	165	0	336	0
Gathering services and related fees
Disaggregation of Revenue [Line Items]
Total revenues	61,631	74,233	125,651	144,580
Gathering services and related fees | Reportable Segments
Disaggregation of Revenue [Line Items]
Total revenues	61,631	74,233	125,651	144,580
Gathering services and related fees | Reportable Segments | Northeast
Disaggregation of Revenue [Line Items]
Total revenues	12,940	17,961	27,576	32,733
Gathering services and related fees | Reportable Segments | Rockies
Disaggregation of Revenue [Line Items]
Total revenues	16,510	18,407	34,299	37,303
Gathering services and related fees | Reportable Segments | Permian
Disaggregation of Revenue [Line Items]
Total revenues	1,822	2,262	3,669	4,461
Gathering services and related fees | Reportable Segments | Piceance
Disaggregation of Revenue [Line Items]
Total revenues	19,981	25,527	40,052	50,311
Gathering services and related fees | Reportable Segments | Barnett
Disaggregation of Revenue [Line Items]
Total revenues	10,378	10,076	20,055	19,772
Gathering services and related fees | Segment Reconciling Items
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Natural gas, NGLs and condensate sales
Disaggregation of Revenue [Line Items]
Total revenues	28,278	16,416	50,736	37,180
Natural gas, NGLs and condensate sales | Reportable Segments
Disaggregation of Revenue [Line Items]
Total revenues	28,294	16,416	50,715	37,180
Natural gas, NGLs and condensate sales | Reportable Segments | Northeast
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Natural gas, NGLs and condensate sales | Reportable Segments | Rockies
Disaggregation of Revenue [Line Items]
Total revenues	14,927	8,506	28,586	20,843
Natural gas, NGLs and condensate sales | Reportable Segments | Permian
Disaggregation of Revenue [Line Items]
Total revenues	10,514	6,875	17,381	13,393
Natural gas, NGLs and condensate sales | Reportable Segments | Piceance
Disaggregation of Revenue [Line Items]
Total revenues	2,067	1,025	3,962	2,878
Natural gas, NGLs and condensate sales | Reportable Segments | Barnett
Disaggregation of Revenue [Line Items]
Total revenues	786	10	786	66
Natural gas, NGLs and condensate sales | Segment Reconciling Items
Disaggregation of Revenue [Line Items]
Total revenues	(16)	0	21	0
Other revenues
Disaggregation of Revenue [Line Items]
Total revenues	9,154	9,392	18,802	17,599
Other revenues | Reportable Segments
Disaggregation of Revenue [Line Items]
Total revenues	8,973	9,392	18,487	17,599
Other revenues | Reportable Segments | Northeast
Disaggregation of Revenue [Line Items]
Total revenues	0	0	0	0
Other revenues | Reportable Segments | Rockies
Disaggregation of Revenue [Line Items]
Total revenues	4,728	6,098	9,885	11,309
Other revenues | Reportable Segments | Permian
Disaggregation of Revenue [Line Items]
Total revenues	1,298	1,049	2,317	1,809
Other revenues | Reportable Segments | Piceance
Disaggregation of Revenue [Line Items]
Total revenues	1,276	1,233	2,551	2,409
Other revenues | Reportable Segments | Barnett
Disaggregation of Revenue [Line Items]
Total revenues	1,671	1,012	3,734	2,072
Other revenues | Segment Reconciling Items
Disaggregation of Revenue [Line Items]
Total revenues	$ 181	$ 0	$ 315	$ 0

REVENUE - Schedule of Informati

REVENUE - Schedule of Information about Contract Assets from Contracts with Customers (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Contract With Customer, Contract Asset, Contract Liability, and Receivable [Roll Forward]
Contract assets, beginning of period	$ 10,327
Additions	4,802
Transfers out	(8,867)
Contract assets, end of period	$ 6,262

REVENUE - Narrative (Details)

REVENUE - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Receivables with customers	$ 49,900	$ 50,500
Contract assets included in accounts receivable	$ 6,262	$ 10,327

PROPERTY, PLANT AND EQUIPMENT -

PROPERTY, PLANT AND EQUIPMENT - Schedule of Property, Plant, and Equipment, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total	$ 2,171,927	$ 2,336,856
Less: accumulated depreciation	(640,477)	(610,774)
Property, plant and equipment, net	1,531,450	1,726,082
Gathering and processing systems and related equipment
Property, Plant and Equipment [Line Items]
Total	2,077,369	2,225,267
Construction in progress
Property, Plant and Equipment [Line Items]
Total	31,874	49,082
Land and line fill
Property, Plant and Equipment [Line Items]
Total	10,212	10,644
Other
Property, Plant and Equipment [Line Items]
Total	$ 52,472	$ 51,863

PROPERTY, PLANT AND EQUIPMENT_2

PROPERTY, PLANT AND EQUIPMENT - Schedule of Depreciation Expense and Capitalized Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 23,714	$ 21,318	$ 47,762	$ 42,784
Capitalized interest	$ 251	$ 149	$ 583	$ 324

EQUITY METHOD INVESTMENTS - Sch

EQUITY METHOD INVESTMENTS - Schedule of Equity Method Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Equity Method Investments [Line Items]
Investment in equity method investees	$ 519,553	$ 523,196
Double E
Schedule of Equity Method Investments [Line Items]
Investment in equity method investees	284,790	280,952
Ohio Gathering
Schedule of Equity Method Investments [Line Items]
Investment in equity method investees	$ 234,763	$ 242,244

DEFERRED REVENUE (Details)

DEFERRED REVENUE (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Change in Contract with Customer, Liability, Current [Roll Forward]
Current deferred revenue, beginning balance	$ 10,374
Add: additions	2,509
Less: revenue recognized	(3,163)
Current deferred revenue, ending balance	9,720
Change in Contract with Customer, Liability, Noncurrent [Roll Forward]
Noncurrent deferred revenue, beginning balance	42,570
Add: additions	269
Less: reclassification to current deferred revenue	(2,477)
Noncurrent deferred revenue, ending balance	$ 40,362

DEBT - Components of Long-Term

DEBT - Components of Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Line of Credit Facility [Line Items]
Term loan	$ 157,758
Less: unamortized debt discount and debt issuance costs	(28,183)	$ (31,391)
Total debt	1,240,038	1,355,072
Current portion of long-term debt	(7,526)	0
Long-term debt, net of issuance costs	1,232,512	1,355,072
Asset Backed Lending Facility
Line of Credit Facility [Line Items]
Secured notes	151,000	267,000
Permian Transmission Credit Facility: Permian Transmission's variable rate senior secured credit facility due March 8, 2028
Line of Credit Facility [Line Items]
Secured notes	0	160,000
Permian Transmission Term Loan
Line of Credit Facility [Line Items]
Term loan	157,758	0
2025 Senior Notes: Summit Holdings' 5.75% senior unsecured notes due April 15, 2025
Line of Credit Facility [Line Items]
Unsecured notes	$ 259,463	$ 259,463
Stated interest rate (as a percent)	5.75%	5.75%
2026 Secured Notes: Summit Holdings' and Finance Corp's 8.50% senior unsecured notes due October 15, 2026
Line of Credit Facility [Line Items]
Unsecured notes	$ 700,000	$ 700,000
Stated interest rate (as a percent)	8.50%	8.50%

DEBT - Narrative (Details)

DEBT - Narrative (Details)	1 Months Ended		6 Months Ended
	Nov. 30, 2021	Feb. 28, 2017	Jun. 30, 2022 USD ($)	Nov. 02, 2021 USD ($)	Mar. 08, 2021 USD ($)
Revolving credit facility | LIBOR
Debt Instrument [Line Items]
Applicable margin (as a percent)			3.25%
ABL Facility
Debt Instrument [Line Items]
Borrowing capacity			$ 400,000,000	$ 400,000,000
Borrowing base capacity			$ 584,500,000
Mandatory redemption period			120 days
Maximum amount of debt outstanding for maturity to occur			$ 50,000,000
Debt Instrument, Interest Rate During Period			4.375%
Unused portion under the facility			$ 243,100,000
First lien net leverage ratio (as a percent)			0.64	2.50
Interest coverage ratio			2.73	2
ABL Facility | Standby Letters of Credit
Debt Instrument [Line Items]
Secured notes			$ 5,900,000
Credit Agreement
Debt Instrument [Line Items]
Borrowing capacity					$ 175,000,000
Interest rate during period (as a percent)			3.40%
Unused portion of the Permian Transmission Credit facility			$ 7,500,000
Credit Agreement | LIBOR
Debt Instrument [Line Items]
Applicable margin (as a percent)			2.375%
Commitment fee (as a percent)			0.70%
Credit Agreement | Term Loan Credit Facility
Debt Instrument [Line Items]
Borrowing capacity					160,000,000
Credit Agreement | Working Capital Credit Facility
Debt Instrument [Line Items]
Borrowing capacity					$ 15,000,000
Secured Notes Indenture, 2026
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount	100%
Secured Notes Indenture, 2026 | Beginning October 15, 2024
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount	102.125%
Secured Notes Indenture, 2026 | Beginning October 15, 2025
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount	100%
Secured Notes Indenture, 2026 | Beginning October 15, 2023
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount	104.25%
2025 Senior Notes | Beginning October 15, 2024 | Summit Holdings And Finance Corporation
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		101.438%
2025 Senior Notes | Beginning October 15, 2025 | Summit Holdings And Finance Corporation
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		100%
Permian Transmission Term Loan
Debt Instrument [Line Items]
Interest rate during period (as a percent)			3.40%
Permian Transmission Term Loan | LIBOR
Debt Instrument [Line Items]
Applicable margin (as a percent)			2.375%

DEBT - Schedule of Maturities (

DEBT - Schedule of Maturities (Details) $ in Thousands	Jun. 30, 2022 USD ($)
Debt
Amortizing principal repayments	$ 157,758
2022	2,405
2023	10,507
2024	15,524
2025	16,580
2026	16,967
Thereafter	$ 95,775

FINANCIAL INSTRUMENTS - Fair va

FINANCIAL INSTRUMENTS - Fair value of Debt Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
2025 Senior Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	$ 259,463	$ 259,463
2025 Senior Notes | Fair Value | Estimated fair value (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	203,354	234,814
2026 Secured Notes | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	700,000	700,000
2026 Secured Notes | Fair Value | Estimated fair value (Level 2)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	$ 628,250	$ 718,083

FINANCIAL INSTRUMENTS - Narrati

FINANCIAL INSTRUMENTS - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Concentration Risk [Line Items]
Gain (loss) on interest rate swaps	$ 3,936	$ (2,686)	$ 10,964	$ (2,692)
Interest Rate Swap
Concentration Risk [Line Items]
Derivative liability, notional amount	142,000		142,000		$ 144,000
Fair value, other assets	10,800		10,800
Gain (loss) on interest rate swaps	$ 3,900		$ 11,000

PARTNERS' CAPITAL AND MEZZANI_3

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Partners' Capital and Schedule of Units (Details) - Common Units - shares	1 Months Ended	6 Months Ended
	Apr. 30, 2021	Jun. 30, 2022
Increase (Decrease) in Partners' Capital [Roll Forward]
Units, beginning balance (in shares)		7,169,834
Series A preferred unit exchange offer, net of shares withheld for taxes (in shares)	538,715	2,853,875
Common units issued for SMLP LTIP, net (in shares)		142,466
Units, ending balance (in shares)		10,166,175

PARTNERS' CAPITAL AND MEZZANI_4

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Narrative (Details) - USD ($) $ in Thousands			1 Months Ended	3 Months Ended			6 Months Ended	12 Months Ended
	May 28, 2020	May 27, 2020	Apr. 30, 2021	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2020	Jun. 30, 2022	Dec. 31, 2021	Jan. 31, 2022	Aug. 05, 2021
Partners Capital [Line Items]
Contributed capital from preferred units exchange				$ 20,900	$ 8,300
Maximum period following end of quarter to distribute all available cash						45 days
Common Units
Partners Capital [Line Items]
Series A preferred unit exchange offer, net of shares withheld for taxes (in shares)			538,715				2,853,875
Common Units
Partners Capital [Line Items]
Common units issued in exchange (in shares)										414,447
Common Units | GP Buy-In
Partners Capital [Line Items]
Number of common units purchased (in shares)	537,307	8,059,609
Common Units | ECP Holdings Warrant | GP Buy-In
Partners Capital [Line Items]
Number of common units purchased (in shares)	129,360	1,940,391
Subsidiary Series A Preferred Units
Partners Capital [Line Items]
Preferred units issued (in shares)							93,039,000	91,439,000
Subsidiary Series A preferred unitholders, outstanding (in shares)							93,039,000	91,439,000
Series A Preferred Units
Partners Capital [Line Items]
Preferred units issued (in shares)			18,662						77,939
Accrued and unpaid distributions							$ 17,400
Cash distribution							1,628
PIK distributions							1,600
Redemption amount							117,600
Issuance costs							$ 2,500	$ 3,900

PARTNERS' CAPITAL AND MEZZANI_5

PARTNERS' CAPITAL AND MEZZANINE CAPITAL - Change in Subsidiary (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Series A Preferred Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Redemption accretion, net of issuance cost amortization	$ 7,277	$ 5,008
Series A Preferred Units
Increase (Decrease) in Partners' Capital [Roll Forward]
Beginning balance	106,325
PIK distributions	1,600
Cash distribution	(1,628)
Ending balance	$ 113,574

EARNINGS PER UNIT (Details)

EARNINGS PER UNIT (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net loss	$ (91,804)	$ (19,738)	$ (91,809)	$ (10,750)
Net loss attributable to Summit Midstream Partners, LP	(94,968)	(23,827)	(100,686)	(18,771)
Add: Deemed capital contribution from 2022 Preferred Exchange Offer	0	0	20,974	0
Add: Deemed capital contribution from 2021 Preferred Exchange Offer	$ 0	$ 8,326	$ 0	$ 8,326
Common unit - basic (in dollars per share)	$ (9.53)	$ (2.91)	$ (8.45)	$ (2.91)
Common unit - diluted (in dollars per share)	$ (9.53)	$ (2.91)	$ (8.45)	$ (2.91)
Nonvested anti-dilutive phantom units excluded from the calculation of diluted EPU (in shares)	0	169	0	173
Series A Preferred Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Less: net income attributable to Series A Preferred Units	$ (1,888)	$ (3,849)	$ (4,108)	$ (8,136)
Series A Preferred Units | Subsidiaries
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Less: net income attributable to Series A Preferred Units	(3,164)	(4,089)	(8,877)	(8,021)
Common Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net loss attributable to common limited partners	$ (96,856)	$ (19,350)	$ (83,820)	$ (18,581)
Weighted-average common units outstanding – basic (in shares)	10,166,000	6,656,000	9,919,000	6,392,000
Effect of nonvested phantom units (in shares)	0	0	0	0
Weighted-average common units outstanding – diluted (in shares)	10,166,000	6,656,000	9,919,000	6,392,000

SUPPLEMENTAL CASH FLOW INFORM_3

SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Supplemental cash flow information:
Cash interest paid			$ 42,039	$ 27,869
Cash paid for taxes			149	15
Noncash investing and financing activities:
Capital expenditures in trade accounts payable (period-end accruals)			3,738	6,059
2022 Preferred Exchange Offer			92,587	0
2021 Preferred Exchange Offer	$ 0	$ 0
Partners' Capital
Noncash investing and financing activities:
2021 Preferred Exchange Offer	$ 92,587		0	20,654
Series A Preferred Units
Noncash investing and financing activities:
Accretion of Subsidiary Series A Preferred Units, net of issuance cost amortization			$ 7,277	$ 5,008

UNIT-BASED AND NONCASH COMPEN_2

UNIT-BASED AND NONCASH COMPENSATION (Details) - SMLP LTIP	6 Months Ended
	Jun. 30, 2022 director $ / shares shares
Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted units (in shares)	146,529
Grant date fair value (in dollars per share) | $ / shares	$ 14.21
Vesting period	3 years
Unvested phantom units granted (in shares)	300,000
Common Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issued units (in shares)	38,664
Number of directors | director	6
Grant date fair value (in dollars per share) | $ / shares	$ 14.21
Units remaining available (in shares)	1,200,000

COMMITMENTS AND CONTINGENCIES -

COMMITMENTS AND CONTINGENCIES - Schedule of Environmental Matters (Details) - Meadowlark Midstream Gathering System $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($)
Accrual for Environmental Loss Contingencies [Roll Forward]
Accrued environmental remediation, beginning balance	$ 5,606
Payments made	(1,883)
Changes in estimates	657
Accrued environmental remediation, ending balance	$ 4,380

COMMITMENTS AND CONTINGENCIES_2

COMMITMENTS AND CONTINGENCIES - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) claim	Dec. 31, 2021 USD ($)
Loss Contingencies [Line Items]
Legal fines and other fees	$ 36,300
Claims settled | claim	1
2015 Blacktail Release
Loss Contingencies [Line Items]
Loss contingency accrual	$ 33,200	$ 33,200
Unpaid penalties and fines, fixed rate (as a percent)	3.25%
Expected payment	$ 5,600
Claims settled | claim	1
Pending claims | claim	2
Natural Resource Damages To Federal and State Governments | 2015 Blacktail Release
Loss Contingencies [Line Items]
Legal fines and other fees	$ 1,250
Penalties and fines, payment period	5 years
Damages Payable To Federal Government over Five Years | 2015 Blacktail Release
Loss Contingencies [Line Items]
Legal fines and other fees	$ 25,000
Damages Payable To State Governments Over Six Years | 2015 Blacktail Release
Loss Contingencies [Line Items]
Legal fines and other fees	$ 10,000
Penalties and fines, payment period	6 years

SEGMENT INFORMATION - Assets, R

SEGMENT INFORMATION - Assets, Revenues, Depreciation and Amortization, and Capital Expenditures by Reportable Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Assets	$ 2,310,333	$ 2,522,462
Reportable Segments
Segment Reporting Information [Line Items]
Assets	2,294,240	2,513,633
Reportable Segments | Northeast
Segment Reporting Information [Line Items]
Assets	610,167	623,224
Reportable Segments | Rockies
Segment Reporting Information [Line Items]
Assets	576,087	592,148
Reportable Segments | Permian
Segment Reporting Information [Line Items]
Assets	300,994	458,988
Reportable Segments | Piceance
Segment Reporting Information [Line Items]
Assets	501,137	524,218
Reportable Segments | Barnett
Segment Reporting Information [Line Items]
Assets	305,855	315,055
Corporate and Other
Segment Reporting Information [Line Items]
Assets	$ 16,093	$ 8,829

SEGMENT INFORMATION - Adjusted

SEGMENT INFORMATION - Adjusted EBITDA by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 59,881	$ 68,647	$ 124,982	$ 135,293
Northeast
Segment Reporting Information [Line Items]
Adjusted EBITDA	18,568	23,361	38,636	43,554
Rockies
Segment Reporting Information [Line Items]
Adjusted EBITDA	13,899	14,732	29,729	30,884
Permian
Segment Reporting Information [Line Items]
Adjusted EBITDA	4,817	1,341	8,966	2,592
Piceance
Segment Reporting Information [Line Items]
Adjusted EBITDA	15,350	20,324	31,118	41,358
Barnett
Segment Reporting Information [Line Items]
Adjusted EBITDA	$ 7,247	$ 8,889	$ 16,533	$ 16,905

SEGMENT INFORMATION - Reconcili

SEGMENT INFORMATION - Reconciliation of Net Income (Loss) to Adjusted EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Segment Reporting [Abstract]
Loss before income taxes and equity method investment income	$ (95,872)	$ (22,290)	$ (99,862)	$ (15,631)
Add:
Corporate and Other expense	5,809	41,144	9,627	49,482
Interest expense	24,887	15,502	49,050	29,455
Depreciation and amortization	30,346	28,598	61,025	57,344
Proportional adjusted EBITDA for equity method investees	11,406	6,841	21,858	13,713
Adjustments related to capital reimbursement activity	(1,578)	(2,225)	(3,306)	(3,470)
Unit-based and noncash compensation	582	1,048	2,272	3,015
Gain on asset sales, net	(313)	(4)	(310)	(140)
Long-lived asset impairments	84,614	33	84,628	1,525
Total of reportable segments' measures of profit	$ 59,881	$ 68,647	$ 124,982	$ 135,293