Atlas Energy 10-Q 11 Jun 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Jun. 08, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Entity Registrant Name	Atlas Energy Group, LLC
Entity Central Index Key	1,623,595
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Units Outstanding		31,973,518
Trading Symbol	ATLS

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 8,783	$ 12,929
Accounts receivable	481	564
Advances to affiliates	129
Prepaid expenses and other	76	160
Total current assets	9,469	13,653
Property, plant and equipment, net	68,963	65,293
Other assets, net	3,771	5,102
Total assets	82,203	84,048
Current liabilities:
Accounts payable	483	332
Advances from affiliates	11,114	9,602
Current portion of derivative payable	579	497
Accrued liabilities	7,304	7,971
Current portion of long-term debt	84,467	79,350
Total current liabilities	103,947	97,752
Asset retirement obligations and other	640	1,968
Commitments and contingencies (Note 6)
Unitholders’ equity (deficit):
Common unitholders’ equity (deficit)	(90,718)	(84,900)
Warrants	1,868	1,868
Unitholders'/owner's equity excluding non-controlling interests	(88,850)	(83,032)
Non-controlling interests	66,466	67,360
Total unitholders’ equity (deficit)	(22,384)	(15,672)
Total liabilities and unitholders’ equity (deficit)	$ 82,203	$ 84,048

COMBINED CONSOLIDATED STATEMENT

COMBINED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Gain (loss) on mark-to-market derivatives	$ (286)	$ 757
Other, net	47	722
Total revenues	1,531	3,875
Costs and expenses:
Gas and oil production	456	952
General and administrative	1,735	1,785
Depreciation, depletion and amortization	975	1,112
Total costs and expenses	3,166	3,849
Operating income (loss)	(1,635)	26
Interest expense	(5,327)	(4,929)
Net loss	(6,962)	(4,903)
Net loss attributable to non-controlling interests	894	281
Net loss attributable to unitholders’ interests	$ (6,068)	$ (4,622)
Net loss attributable to unitholders per common unit (Note 2):
Basic	$ (0.19)	$ (0.18)
Diluted	$ (0.19)	$ (0.18)
Weighted average common units outstanding (Note 2):
Basic	31,973	26,062
Diluted	31,973	26,062
Natural Gas
Revenues:
Revenues	$ 36	$ 101
Oil
Revenues:
Revenues	1,630	2,185
NGLs
Revenues:
Revenues	$ 104	$ 110

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN UNITHOLDERS' EQUITY (DEFICIT) (Unaudited) - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Unitholders' Equity (Deficit)	Warrants	Non-Controlling Interest
Balance at Dec. 31, 2017	$ (15,672)	$ (84,900)	$ 1,868	$ 67,360
Balance units at Dec. 31, 2017		31,973,122	4,668,044
Net issued and unissued units under incentive plan	250	$ 250
Net issued and unissued units under incentive plan (units)		396
Net loss	(6,962)	$ (6,068)		(894)
Balance at Mar. 31, 2018	$ (22,384)	$ (90,718)	$ 1,868	$ 66,466
Balance units at Mar. 31, 2018		31,973,518	4,668,044

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (6,962)	$ (4,903)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, depletion and amortization	975	1,112
(Gain) loss on derivatives	237	(705)
Amortization of deferred financing costs and debt discount	212	374
Non-cash compensation expense	250	359
Paid-in-kind interest	4,972	4,303
Equity income in unconsolidated companies		(722)
Distributions received from unconsolidated companies		404
Changes in operating assets and liabilities:
Accounts receivable, prepaid expenses and other	11	(4)
Advances to/from affiliates	1,383	6,106
Accounts payable and accrued liabilities	(4,945)	(6,409)
Net cash used in operating activities	(3,867)	(85)
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(225)
Net cash used in investing activities	(225)
CASH FLOWS FROM FINANCING ACTIVITIES:
Deferred financing costs, distribution equivalent rights and other	(54)	(8)
Net cash used in financing activities	(54)	(8)
Net change in cash and cash equivalents	(4,146)	(93)
Cash and cash equivalents, beginning of year	12,929	12,009
Cash and cash equivalents, end of period	$ 8,783	$ 11,916

Organization

Organization	3 Months Ended
	Mar. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	NOTE 1—ORGANIZATION We are a publicly traded (OTCQB: ATLS) Delaware limited liability company formed in October 2011. Our operations primarily consist of our ownership interests in the following: • All of the incentive distribution rights, an 80.0% general partner interest and a 2.1% limited partner interest in Atlas Growth Partners, L.P. (“AGP”), a Delaware limited partnership and an independent developer and producer of natural gas, crude oil and NGLs with operations primarily focused in the Eagle Ford Shale in South Texas; • A 12.0% limited partner interest in Lightfoot Capital Partners, L.P. (“Lightfoot L.P.”) and a 15.9% general partner interest in Lightfoot Capital Partners GP, LLC (“Lightfoot G.P.” and together with Lightfoot L.P., “Lightfoot”), the general partner of Lightfoot L.P., an entity for which Jonathan Cohen, Executive Chairman of the Company’s board of directors, is the Chairman of the board of directors. Lightfoot focuses its investments primarily on incubating new MLPs and providing capital to existing MLPs in need of additional equity or structured debt. See Note 2 for further disclosures regarding Lightfoot; • A membership interest in the founder shares of Osprey Sponsor, LLC (“Osprey Sponsor”) received in August 2017. Osprey Sponsor is the sponsor of Osprey Energy Acquisition Corp (“Osprey”). We received our membership interest in recognition of potential utilization, if any, of our office space, advisory services and personnel by Osprey. See Note 2 for further disclosures regarding Osprey and Osprey Sponsor; and • A 2% preferred membership interest in Titan Energy, LLC (“Titan”), an independent developer and producer of natural gas, crude oil and NGL with operations in basins across the United States. Titan Energy Management, LLC, our wholly owned subsidiary (“Titan Management”), holds the Series A Preferred Share of Titan, which entitles us to receive 2% of the aggregate of distributions paid to shareholders (as if we held 2% of Titan’s members’ equity, subject to potential dilution in the event of future equity interests) and to appoint four of seven directors. At March 31, 2018, we had 31,973,518 common units issued and outstanding.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	NOTE 2—BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and the applicable rules and regulations of the Securities Exchange Commission regarding interim financial reporting and include all adjustments that are necessary for a fair presentation of our consolidated results of operations, financial condition and cash flows for the periods shown, including normal, recurring accruals and other items. The consolidated results of operations for the interim periods presented are not necessarily indicative of results for the full year. The year-end condensed consolidated balance sheet was derived from audited financial statements but does not include all disclosures required by U.S. GAAP. For a more complete discussion of our accounting policies and certain other information, refer to our consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31 2017. We determined that AGP is a variable interest entity (“VIE”) based on AGP’s partnership agreement; our power, as the general partner, to direct the activities that most significantly impact AGP’s economic performance; and our ownership of AGP’s incentive distribution rights. Accordingly, we consolidated the financial statements of AGP into our condensed consolidated financial statements. Our consolidated VIE’s operating results and asset balances are presented separately in Note 7 – Operating Segment Information. As the general partner for AGP, we have unlimited liability for the obligations of AGP except for those contractual obligations that are expressly made without recourse to the general partner. The non-controlling interest in AGP is reflected as (income) loss attributable to non-controlling interests in the condensed consolidated statements of operations and as a component of unitholders’ equity on the condensed consolidated balance sheets. All intercompany transactions have been eliminated. Liquidity, Capital Resources, and Ability to Continue as a Going Concern Our primary sources of liquidity are cash distributions received with respect to our ownership interests in AGP, Lightfoot, and Titan and AGP’s annual management fee. However, neither Titan nor AGP are currently paying distributions. In addition, Lightfoot completed a portion of its sale transaction that will result in significantly lower quarterly distributions to us. Our primary cash requirements, in addition to normal operating expenses, are for debt service and capital expenditures, which we expect to fund through operating cash flow, and cash distributions received. Accordingly, our sources of liquidity are currently not sufficient to satisfy the obligations under our credit agreements. The significant risks and uncertainties related to our primary sources of liquidity raise substantial doubt about our ability to continue as a going concern. We continue to face significant liquidity issues and are currently considering, and are likely to make, changes to our capital structure to maintain sufficient liquidity, meet our debt obligations and manage and strengthen our balance sheet. Without a further extension from our lenders or other significant transaction or capital infusion, we do not expect to have sufficient liquidity to repay our first lien credit agreement at June 30, 2018, and as a result, there is substantial doubt regarding our ability to continue as a going concern. The amounts outstanding under our credit agreements were classified as current liabilities as both obligations are due within one year from the balance sheet date. In total, we have $84.5 million of outstanding indebtedness under our credit agreements, which is net of $0.6 million of debt discounts and $0.1 million of deferred financing costs, as current portion of long term debt, net on our condensed consolidated balance sheet as of March 31, 2018. We continually monitor capital markets and may make changes to our capital structures from time to time, with the goal of maintaining financial flexibility, preserving or improving liquidity, strengthening the balance sheet, meeting debt service obligations and/or achieving cost efficiency. For example, we could pursue options such as refinancing or reorganizing our indebtedness or capital structure or seek to raise additional capital through debt or equity financing to address our liquidity concerns and high debt levels. There is no certainty that we will be able to implement any such options, and we cannot provide any assurances that any refinancing or changes to our debt or equity capital structure would be possible or that additional equity or debt financing could be obtained on acceptable terms, if at all, and such options may result in a wide range of outcomes for our stakeholders, including cancellation of debt income (“CODI”) which would be directly allocated to our unitholders and reported on such unitholders’ separate returns. It is possible additional adjustments to our strategic plan and outlook may occur based on market conditions and our needs at that time, which could include selling assets or seeking additional partners to develop our assets. Our condensed consolidated financial statements have been prepared on a going concern basis of accounting, which contemplates continuity of operations, realization of assets, and satisfaction of liabilities and commitments in the normal course of business. Our condensed consolidated financial statements do not include any adjustments that might result from the outcome of the going concern uncertainty. If we cannot continue as a going concern, adjustments to the carrying values and classification of our assets and liabilities and the reported amounts of income and expenses could be required and could be material. Use of Estimates The preparation of our condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities that exist at the date of our condensed consolidated financial statements, as well as the reported amounts of revenue and costs and expenses during the reporting periods. Our condensed consolidated financial statements are based on a number of significant estimates, including revenue and expense accruals, depletion of gas and oil properties and the fair value of derivative instruments. The natural gas industry principally conducts its business by processing actual transactions as many as 60 days after the month of delivery. Consequently, the most recent two months’ financial results were recorded using estimated volumes and contract market prices. Actual results could differ from those estimates. Derivative Instruments We enter into certain financial contracts to manage our exposure to movement in commodity prices. The derivative instruments recorded in the condensed consolidated balance sheets are measured as either an asset or liability at fair value. Changes in the fair value of derivative instruments are recognized currently within gain (loss) on mark-to-market derivatives in our condensed consolidated statements of operations. We use a market approach fair value methodology to value the assets and liabilities for our outstanding derivative instruments. We manage and report derivative assets and liabilities on the basis of our exposure to market risks and credit risks by counterparty. Commodity derivative instruments are valued based on observable market data related to the change in price of the underlying commodity and are therefore defined as Level 2 assets and liabilities within the same class of nature and risk. These derivative values were calculated by utilizing commodity indices, quoted prices for futures and options contracts traded on open markets that coincide with the underlying commodity, expiration period, strike price (if applicable) and pricing formula utilized in the derivative instrument. The following table summarizes the commodity derivative activity for the period indicated (in thousands): Three Months Ended March 31, 2018 2017 Gains (losses) recognized on cash settlement $ (49 ) $ 52 Changes in fair value on open derivative contracts (237 ) 705 Gain (loss) on mark-to-market derivatives $ (286 ) $ 757 As of March 31, 2018, we had commodity derivatives for 74,500 barrels at an average fixed price of $52.51. The fair value of our commodity derivatives was a liability of $0.6 million as of March 31, 2018. Revenue Recognition On January 1, 2018, we adopted ASU No. 2014–09, Revenue from Contracts with Customers Oil, Natural Gas, and NGL Revenues Our revenues are derived from the sale of oil, natural gas, and NGLs, which is recognized in the period that the performance obligations are satisfied. We generally consider the delivery of each unit (Bbl or MMBtu) to be separately identifiable and represents a distinct performance obligation that is satisfied at a point-in-time once control of the product has been transferred to the customer upon delivery to an agreed upon delivery point. Transfer of control typically occurs when the products are delivered to the purchaser, and title has transferred. Revenue is recognized net of royalties due to third parties in an amount that reflects the consideration we expect to receive in exchange for those products. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by us from a customer, are excluded from revenue. Payment is generally received one month after the sale has occurred. Our oil production is primarily sold under market-sensitive contracts that are typically priced at a differential to the New York Mercantile Exchange (“NYMEX”) price or at purchaser posted prices for the producing area. For oil contracts, we generally record sales based on the net amount received. Our natural gas production is primarily sold under market-sensitive contracts that are typically priced at a differential to the published natural gas index price for the producing area due to the natural gas quality and the proximity to major consuming markets. For natural gas contracts, we generally record wet gas sales (which consists of natural gas and NGLs based on end products after processing) at the wellhead or inlet of the plant as revenues net of transportation, gathering and processing expenses if the processor is the customer and there is no redelivery of commodities to us at the tailgate of the plant. Conversely, we generally record residual natural gas and NGL sales at the tailgate of the plant on a gross basis along with the associated transportation, gathering and processing expenses if the processor is a service provider and there is redelivery of commodities to us at the tailgate of the plant. All facts and circumstances of an arrangement are considered and judgment is often required in making this determination. Transaction Price Allocated to Remaining Performance Obligations A significant number of our product sales are short-term in nature generally through evergreen contracts with contract terms of one year or less. These contracts typically automatically renew under the same provisions. For those contracts, we have utilized the practical expedient allowed in the new revenue standard that exempts us from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less. For product sales that have a contract term greater than one year, we have utilized the practical expedient that exempts us from disclosure of the transaction price allocated to remaining performance obligations if the variable consideration is allocated entirely to a wholly unsatisfied performance obligation. Under these sales contracts, each unit of product generally represents a separate performance obligation; therefore, future volumes are wholly unsatisfied and disclosure of the transaction price allocated to remaining performance obligations is not required. Currently, our product sales that have a contractual term greater than one year have no long-term fixed consideration. Contract Balances Under our sales contracts, customers are invoiced once performance obligations have been satisfied, at which point payment is unconditional. Accordingly, our product sales contracts do not give rise to contract assets or liabilities. Accounts receivable attributable to our revenue contracts with customers was $0.5 million and $0.6 million at March 31, 2018 and December 31, 2017, respectively. Equity Method Investments Investment in Titan . Titan is a VIE based on its limited liability company agreement and the delegation of management and omnibus agreements between Titan and Titan Management, which provide us the power to direct activities that most significantly impact Titan’s economic performance, but we do not have a controlling financial interest. As a result, we do not consolidate Titan but rather apply the equity method of accounting as we have the ability to exercise significant influence over Titan’s operating and financial decisions. At March 31, 2018, we had a 2% Series A Preferred interest in Titan. As of March 31, 2018 and December 31, 2017, the net carrying amount of our investment in Titan was zero. During the three months ended March 31, 2018 and 2017, we recognized equity income of zero and $0.5 million, respectively, within other revenues, net on our condensed consolidated statements of operations. Investment in Lightfoot. At March 31, 2018, we had an approximate 12.0% interest in Lightfoot L.P. and an approximate 15.9% interest in Lightfoot G.P., the general partner of Lightfoot L.P. We account for our investment in Lightfoot under the equity method of accounting due to our ability to exercise significant influence over Lightfoot’s operating and financial decisions. As of March 31, 2018 and December 31, 2017, the net carrying amount of our investment in Lightfoot was zero. During the three months ended March 31, 2018 and 2017, we recognized equity income of zero and $0.2 million, respectively, within other revenues, net on our condensed consolidated statements of operations. During the three months ended March 31, 2018 and 2017, we received cash distributions of approximately zero and $0.4 million, respectively. On August 29, 2017, Lightfoot G.P., Lightfoot L.P. and Lightfoot’s subsidiary, Arc Logistics Partners LP (NYSE: ARCX) (“Arc Logistics”), entered into a Purchase Agreement and Plan of Merger (the “Merger Agreement”) with Zenith Energy U.S., L.P. (together with its affiliates, “Zenith”), a portfolio company of Warburg Pincus, pursuant to which Zenith will acquire Arc Logistics GP LLC (“Arc GP”), the general partner of Arc Logistics (the “GP Transfer”), and all of the outstanding common units of Arc Logistics (the “Merger” and, together with the GP Transfer, the “Proposed Transaction”). Under the terms of the Merger Agreement, Lightfoot L.P. will receive $14.50 per common unit of Arc Logistics in cash for the approximately 5.2 million common units held by it. Lightfoot G.P. will receive $94.5 million for 100% of the membership interests in Arc GP. In December 2017, Lightfoot closed on a portion of the Proposed Transaction which resulted in a net distribution to us of $21.6 million. We used the net proceeds to pay down $21.6 million of our first lien credit agreement. The remaining part of the Proposed Transaction is subject to the closing of the purchase by Zenith of a 5.51646 % interest (and, subject to certain conditions, an additional 4.16154% interest) in Gulf LNG Holdings Group, LLC (“Gulf LNG”), which owns a liquefied natural gas regasification and storage facility in Pascagoula, Mississippi, from LCP LNG Holdings, LLC, a subsidiary of Lightfoot L.P. (“LCP’). We anticipate receiving net proceeds of approximately $3.0 million from LCP selling its interest in Gulf LNG, which is targeted to close in the second quarter of 2018, and we anticipate using the net proceeds to pay down a portion of our first lien credit agreement. Interest in Joliet Terminal In connection with the closing of the first portion of Lightfoot’s Proposed Transaction in December 2017, we acquired a 1.8% ownership interest in Zenith Energy Terminals Joliet Holdings, LLC (“Joliet Terminal”) for $3.3 million, which is included within other assets, net, on our condensed consolidated balance sheets as of March 31, 2018 and December 31, 2017. Our investment in Joliet Terminal is classified as a nonmarketable equity security without a readily determinable fair value and is recorded at cost, less impairment, if any, in accordance with the accounting guidance measurement alternative. If an observable event occurs, we would estimate the fair value of our investment based on Level 2 inputs that could be derived from observable price changes of similar securities adjusted for insignificant differences in rights and obligations and the changes in value would be recorded in other revenues, net on our condensed consolidated statement of operations. Interest in Osprey Sponsor At March 31, 2018, we have a membership interest in Osprey Sponsor, which is the sponsor of Osprey. We received our membership interest in recognition of potential utilization, if any, of our office space, advisory services and personnel by Osprey. On July 26, 2017, Osprey, for which certain of our executives, namely Jonathan Cohen, Edward Cohen and Daniel Herz, serve as CEO, Executive Chairman and President, respectively, consummated its initial public offering. Osprey was formed for the purpose of acquiring, through a merger, capital stock exchange, asset acquisition, stock purchase, reorganization, or other similar business transaction, one or more operating businesses or assets. The initial public offering, including the overallotment exercised by the underwriters, generated net proceeds of $275 million through the issuance of 27.5 million units, which were contributed to a trust account and are intended to be applied generally toward consummating a business combination. Our membership interest in Osprey Sponsor is an allocation of 1,250,000 founder shares, consisting of 1,250,000 shares of Class B common stock of Osprey that are automatically convertible into Class A common stock of Osprey upon the consummation of a business combination on a one-for-one basis. Additionally, another 125,000 founder shares have been allocated to our employees other than Messrs. Cohen, Cohen and Herz. Pursuant to the Osprey Sponsor limited liability company agreement, owners of the founder shares agree to (i) vote their shares in favor of approving a business combination, (ii) waive their redemption rights in connection with the consummation of a business combination, and (iii) waive their rights to liquidating distributions from the trust account if Osprey fails to consummate a business combination. In addition, Osprey Sponsor has agreed to not to transfer, assign or sell any of the founder shares until the earlier of (i) one year after the date of the consummation of a business combination, or (ii) the date on which the last sales price of Osprey’s common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations and recapitalizations) for any 20 trading days within any 30-trading day period commencing 150 days after a business combination, or earlier, in each case, if subsequent to a business combination, Osprey consummates a subsequent liquidation, merger, stock exchange, reorganization or other similar transaction which results in all of Osprey’s stockholders having the right to exchange their common stock for cash, securities or other property. On June 4, 2018, Osprey entered into a definitive agreement to acquire the assets of Royal Resources (“Royal”), an entity owned by funds managed by Blackstone Energy Partners and Blackstone Capital Partners (“Blackstone”), (the “Business Combination”). The acquired Royal assets represent the entirety of Blackstone’s mineral interests in the Eagle Ford Shale. The combined company will be named Falcon Minerals Corporation and will be led by Osprey’s management team . We have determined that Osprey Sponsor is a VIE based on its limited liability company agreement. Through our direct interest and indirectly through the interests of our related parties, we have certain characteristics of a controlling financial interest and the power to direct activities that most significantly impact Osprey Sponsor’s economic performance; however, we are not the primary beneficiary. As a result, we do not consolidate Osprey Sponsor but rather apply the equity method of accounting as we, through our direct interest and indirectly through the interests of our related parties, have the ability to exercise significant influence over Osprey Sponsor’s operating and financial decisions. As of March 31, 2018 and December 31, 2017, the net carrying amount of our interest in Osprey Sponsor was zero as our membership interest was received in recognition of potential utilization, if any, of our office space, advisory services and personnel by Osprey, and we have provided a nominal amount of services to Osprey as of March 31, 2018. During the three months ended March 31, 2018, we did not recognize any equity method income as Osprey Sponsor has no operations. Rabbi Trust In 2011, we established an excess 401(k) plan relating to certain executives. In connection with the plan, we established a “rabbi” trust for the contributed amounts. At March 31, 2018 and December 31, 2017, we reflected $0.2 million and $1.5 million, respectively, related to the value of the rabbi trust within other assets, net on our condensed consolidated balance sheets, and recorded corresponding liabilities of $0.2 million and $1.5 million, respectively, as of those same dates, within asset retirement obligations and other on our condensed consolidated balance sheets. During the three months ended March 31, 2018 and 2017, we distributed $1.3 million and $2.1 million, respectively, to certain executives related to the rabbi trust. Accrued Liabilities We had $3.7 million and $6.6 million of accrued payroll and benefit items at March 31, 2018 and December 31, 2017, respectively, which were included within accrued liabilities on our condensed consolidated balance sheets. Net Income (Loss) Per Common Unit Basic net income (loss) attributable to common unitholders per unit is computed by dividing net income (loss) attributable to common unitholders, which is determined after the deduction of net income attributable to participating securities and the preferred unitholders’ interests, if applicable, by the weighted average number of common units outstanding during the period. Unvested unit-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities. A portion of our phantom unit awards, which consist of common units issuable under the terms of our long-term incentive plans and incentive compensation agreements, contain non-forfeitable rights to distribution equivalents. The participation rights result in a non-contingent transfer of value each time we declare a distribution or distribution equivalent right during the award’s vesting period. However, unless the contractual terms of the participating securities require the holders to share in the losses of the entity, net loss is not allocated to the participating securities. As such, the net income utilized in the calculation of net income (loss) per unit must be after the allocation of only net income to the phantom units on a pro-rata basis. The following is a reconciliation of net income (loss) allocated to the common unitholders for purposes of calculating net income (loss) attributable to common unitholders per unit (in thousands): Three Months Ended March 31, 2018 2017 Net loss $ (6,962 ) $ (4,903 ) Preferred unitholders’ dividends — — Loss attributable to non-controlling interests 894 281 Net loss attributable to common unitholders (6,068 ) (4,622 ) Less: Net income attributable to participating securities – phantom units (1) — — Net loss utilized in the calculation of net loss attributable to common unitholders per unit – diluted $ (6,068 ) $ (4,622 ) (1) Net income (loss) attributable to common unitholders for the net income (loss) attributable to common unitholders per unit calculation is net income (loss) attributable to common unitholders, less income allocable to participating securities. For the three months ended March 31, 2018 and 2017, net loss attributable to common unitholder’s ownership interest was not allocated to 12,000 and 178,000 phantom units, respectively, because the contractual terms of the phantom units as participating securities do not require the holders to share in the losses of the entity. Diluted net income (loss) attributable to common unitholders per unit is calculated by dividing net income (loss) attributable to common unitholders, less income allocable to participating securities, by the sum of the weighted average number of common unitholder units outstanding and the dilutive effect of unit option awards and convertible preferred units, as calculated by the treasury stock or if converted methods, as applicable. Unit options consist of common units issuable upon payment of an exercise price by the participant under the terms of our long-term incentive plan. The following table sets forth the reconciliation of our weighted average number of common units used to compute basic net loss attributable to common unitholders per unit with those used to compute diluted net loss attributable to common unitholders per unit (in thousands): Three Months Ended March 31, 2018 2017 Weighted average number of common units—basic 31,973 26,062 Add effect of dilutive incentive awards (1) — — Add effect of dilutive convertible preferred units and warrants (2) — — Weighted average number of common units—diluted 31,973 26,062 (1) For the three months ended March 31, 2018 and 2017, approximately 2,299,000 and 3,521,000 phantom units, respectively, were excluded from the computation of diluted net income (loss) attributable to common unitholders per unit, because the inclusion of such units would have been anti-dilutive. (2) For the three months ended March 31, 2018 and 2017, our warrants issued in connection with the second lien credit agreement were excluded from the computation of diluted earnings attributable to common unitholders per unit because the inclusion of such warrants would have been anti-dilutive. For the three months ended March 31, 2017, our convertible Series A Preferred Units were excluded from the computation of diluted earnings attributable to common unitholders per unit, because the inclusion of such units would have been anti-dilutive. Recently Issued Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to leases. The updated accounting guidance requires lessees to recognize a lease asset and liability at the commencement date of all leases (with the exception of short-term leases), initially measured at the present value of the lease payments. The updated guidance is effective for us as of January 1, 2019 and requires a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest period presented. We are currently in the process of determining the impact that the updated accounting guidance will have on our condensed consolidated financial statements. In January 2016, the FASB updated the accounting guidance related to the recognition and measurement of financial assets and financial liabilities. The updated accounting guidance, among other things, requires that all nonconsolidated equity investments, except those accounted for under the equity method, be measured at fair value and that the changes in fair value be recognized in net income. The accounting guidance requires nonmarketable equity securities to be recorded at cost and adjusted to fair value at each reporting period. However, the guidance allows for a measurement alternative, which is to record the investments at cost, less impairment, if any, and subsequently adjust for observable price changes of identical or similar investments of the same issuer. We adopted the new accounting guidance on January 1, 2018 and applied the measurement alternative to our interest in Joliet Terminal as there is not a readily determinable fair value for our investment.

Property, Plant and Equipment

Property, Plant and Equipment	3 Months Ended
	Mar. 31, 2018
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	NOTE 3—PROPERTY, PLANT AND EQUIPMENT The following is a summary of property, plant and equipment at the dates indicated (in thousands): March 31, 2018 December 31, 2017 Natural gas and oil properties: Proved properties $ 152,581 $ 147,932 Support equipment and other 3,180 3,188 155,761 151,120 Less – accumulated depreciation, depletion and amortization (86,798 ) (85,827 ) $ 68,963 $ 65,293 During the three months ended March 31, 2018, we recognized $4.4 million of non-cash investing activities capital expenditures, which were included within the changes in accounts payable and accrued liabilities on our condensed consolidated statements of cash flows. As of March 31, 2017, we did not have any non-cash investing activity capital expenditures.

Debt

Debt	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Debt	NOTE 4—DEBT Total debt consists of the following at the dates indicated (in thousands): March 31, December 31, 2018 2017 First Lien Credit Agreement $ 21,232 $ 20,666 Second Lien Credit Agreement 63,958 59,552 Debt discount, net of accumulated amortization of $1,245 and $1,090 (622 ) (778 ) Deferred financing costs, net of accumulated amortization of $2,747 and $2,704, respectively (101 ) (90 ) Total debt, net 84,467 79,350 Less current maturities (84,467 ) (79,350 ) Total long-term debt, net $ — $ — The estimated fair value of our debt at March 31, 2018 approximated its carrying value of $84.6 million, which consisted of credit agreements that bear interest at variable rates and are categorized as Level 1 values. Cash Interest. Cash payments for interest were $0.2 million and $0.2 million for the three months ended March 31, 2018 and 2017, respectively. Credit Agreements First Lien Credit Agreement . Our first lien credit agreement with Riverstone Credit Partners, L.P., as administrative agent (“Riverstone”), and the lenders (the “Lenders”) from time to time party thereto (the “First Lien Credit Agreement”), was scheduled to mature on September 30, 2017. Between September 29, 2017 and April 26, 2018, we entered into a series of amendments to extend the maturity of our First Lien Credit Agreement to June 30, 2018. The First Lien Credit Agreement has an applicable cash interest rate margin for ABR Loans and Eurodollar Loans of 0.50% and 1.50%, respectively, and an 11% interest rate payable in-kind through an increase in the outstanding principal. As of March 31, 2018, we were not in compliance with the financial covenants required by the First Lien Credit Agreement. Second Lien Credit Agreement. Our second lien credit agreement with Riverstone and the Lenders (the “Second Lien Credit Agreement”) matures on March 30, 2019 and has an unamortized discount of $0.6 million as of March 31, 2018, related to the 4,668,044 warrants issued in connection with the Second Lien Credit Agreement. Borrowings under the Second Lien Credit Agreement bear interest at a rate of 30%, payable in-kind through an increase in the outstanding principal. As of March 31, 2018, we were not in compliance with the financial covenants required by the Second Lien Credit Agreement. In connection with the First Lien Credit Agreement and Second Lien Credit Agreement, the lenders thereunder continued their syndicated participation in the underlying loans consistent with the original term loan facilities and therefore certain of the Company’s current and former officers participated in approximately 12% of the loan syndication and warrants and a foundation affiliated with a 5% or more unitholder participated in approximately 12% of the loan syndication. The amounts outstanding under our First Lien Credit Agreement and Second Lien Credit Agreement were classified as current liabilities as both obligations are due within one year from the balance sheet date. In total, we have $84.5 million of outstanding indebtedness under our credit agreements, which is net of $0.6 million of debt discounts and $0.1 million of deferred financing costs, as current portion of long term debt, net on our condensed consolidated balance sheet as of March 31, 2018.

Certain Relationships and Relat

Certain Relationships and Related Party Transactions	3 Months Ended
	Mar. 31, 2018
Related Party Transactions [Abstract]
Certain Relationships And Related Party Transactions	NOTE 5—CERTAIN RELATIONSHIPS AND RELATED PARTY TRANSACTIONS Relationship with Titan . Other than its named executive officers, Titan does not directly employ any persons to manage or operate its business. These functions were provided by employees of us and/or our affiliates. On September 1, 2016, Titan entered into a Delegation of Management Agreement (the “Delegation Agreement”) with Titan Management, our wholly owned subsidiary. Pursuant to the Delegation Agreement, Titan has delegated to Titan Management all of Titan’s rights and powers to manage and control the business and affairs of Titan Energy Operating, LLC (“Titan Operating”), a wholly owned subsidiary of Titan. However, Titan’s board of directors retains management and control over certain non-delegated duties. In addition, Titan also entered into an Omnibus Agreement (the “Omnibus Agreement”) dated September 1, 2016 with Titan Management, Atlas Energy Resource Services, Inc. (“AERS”), our wholly owned subsidiary, and Titan Operating. Pursuant to the Omnibus Agreement, Titan Management and AERS will provide Titan and Titan Operating with certain financial, legal, accounting, tax advisory, financial advisory and engineering services (including cash management services) and Titan and Titan Operating will reimburse Titan Management and AERS for their direct and allocable indirect expenses incurred in connection with the provision of the services, subject to certain approval rights in favor of Titan’s Conflicts Committee. As of March 31, 2018 and December 31, 2017, we had payables of $11.1 million and $9.6 million to Titan related to the timing of funding cash accounts related to general and administrative expenses, such as payroll and benefits, which was recorded in advances from affiliates in our condensed consolidated balance sheets. Relationship with AGP . AGP does not directly employ any persons to manage or operate its business. These functions are provided by employees of us and/or our affiliates. Atlas Growth Partners, GP, LLC (“AGP GP”) receives an annual management fee in connection with its management of AGP equivalent to 1% of capital contributions per annum. During each of the three months ended March 31, 2018 and 2017, AGP paid a management fee of $0.6 million. We charge direct costs, such as salary and wages, and allocate indirect costs, such as rent for offices, to AGP based on the number of its employees who devoted their time to activities on its behalf. AGP reimburses us at cost for direct costs incurred on its behalf. AGP reimburses all necessary and reasonable indirect costs allocated by the general partner. Relationship with Lightfoot . Jonathan Cohen, Executive Chairman of the Company’s board of directors, is the Chairman of the board of directors of Lightfoot G.P. As part of the relationship, we assumed the obligations under an agreement pursuant to which Messrs. Cohen receives compensation in recognition of his role continued service as chair of Lightfoot G.P. Pursuant to the agreement, Messrs. Cohen receives an amount equal to 10% of the distributions that we receive from the Lightfoot entities, excluding amounts that constitute a return of capital to us. During the three months ended March 31, 2018 and 2017, Messrs and Cohen received compensation in accordance with the above agreement of zero and $0.1 million, respectively. Relationship with Osprey Sponsor . We received our membership interest in Osprey Sponsor in recognition of potential utilization, if any, of our office space, advisory services and personnel by Osprey, for which we will be reimbursed at cost. We have provided a nominal amount of services to Osprey as of March 31, 2018. AGP’s Relationship with Titan . At our direction, AGP reimburses Titan for direct costs, such as salaries and wages, charged to AGP based on our employees who incurred time to activities on AGP’s behalf and indirect costs, such as rent and other general and administrative costs, allocated to AGP based on the number of our employees who devoted their time to activities on AGP’s behalf. As of March 31, 2018 and December 31, 2017, AGP had a receivable of $0.1 million from Titan and a payable of $0.1 million to Titan, respectively, related to the direct costs, indirect cost allocation, and timing of funding of cash accounts for operating activities, which was recorded in advances to/from affiliates in the condensed consolidated balance sheets. Other Relationships. We have other related party transactions with regard to our First Lien Credit Agreement and Second Lien Credit Agreement (see Note 4) and our general partner and limited partner interest in Lightfoot (see Notes 1 and 2).

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	NOTE 6—COMMITMENTS AND CONTINGENCIES Legal Proceedings We are parties to various routine legal proceedings arising out of the ordinary course of business. Our management and our subsidiaries believe that none of these actions, individually or in the aggregate, will have a material adverse effect on our financial condition or results of operations. Environmental Matters We are subject to various federal, state and local laws and regulations relating to the protection of the environment. We have established procedures for the ongoing evaluation of our and our subsidiaries’ operations, to identify potential environmental exposures and to comply with regulatory policies and procedures. Environmental expenditures that relate to current operations are expensed or capitalized as appropriate. Expenditures that relate to an existing condition caused by past operations and do not contribute to current or future revenue generation are expensed. Liabilities are recorded when environmental assessments and/or clean-ups are probable, and the costs can be reasonably estimated. We maintain insurance which may cover in whole or in part certain environmental expenditures. We had no environmental matters requiring specific disclosure or requiring the recognition of a liability as of March 31, 2018 and December 31, 2017.

Operating Segment Information

Operating Segment Information	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Operating Segment Information	NOTE 7—OPERATING SEGMENT INFORMATION Our operations include two reportable operating segments: AGP and corporate and other. These operating segments reflected the way we managed our operations and made business decisions. Corporate and other includes our equity investments in Lightfoot (see Note 2) and Titan (see Note 2), as well as our general and administrative and interest expenses. Operating segment data for the periods indicated were as follows (in thousands): Three Months Ended March 31, 2018 2017 Atlas Growth Partners: Revenues (1) $ 1,484 $ 3,153 Operating costs and expenses (1,437 ) (2,333 ) Depreciation, depletion and amortization expense (975 ) (1,112 ) Segment loss $ (928 ) $ (292 ) Corporate and other: Revenues $ 47 $ 722 General and administrative (754 ) (404 ) Interest expense (5,327 ) (4,929 ) Segment loss $ (6,034 ) $ (4,611 ) Reconciliation of segment loss to net loss: Segment loss: Atlas Growth Partners (928 ) (292 ) Corporate and other (6,034 ) (4,611 ) Net loss $ (6,962 ) $ (4,903 ) Reconciliation of segment revenues to total revenues: Segment revenues: Atlas Growth Partners 1,484 3,153 Corporate and other 47 722 Total revenues $ 1,531 $ 3,875 Capital expenditures: Atlas Growth Partners 225 — Total capital expenditures $ 225 $ — March 31, December 31, 2018 2017 Balance sheet: Total assets: Atlas Growth Partners $ 76,597 $ 74,219 Corporate and other 5,606 9,829 Total assets $ 82,203 $ 84,048 1) Revenues include respective portions of gains (losses) on mark—to—market derivatives.

Basis of Presentation and Sum13

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation and Combination	Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and the applicable rules and regulations of the Securities Exchange Commission regarding interim financial reporting and include all adjustments that are necessary for a fair presentation of our consolidated results of operations, financial condition and cash flows for the periods shown, including normal, recurring accruals and other items. The consolidated results of operations for the interim periods presented are not necessarily indicative of results for the full year. The year-end condensed consolidated balance sheet was derived from audited financial statements but does not include all disclosures required by U.S. GAAP. For a more complete discussion of our accounting policies and certain other information, refer to our consolidated financial statements included in our Annual Report on Form 10-K for the fiscal year ended December 31 2017. We determined that AGP is a variable interest entity (“VIE”) based on AGP’s partnership agreement; our power, as the general partner, to direct the activities that most significantly impact AGP’s economic performance; and our ownership of AGP’s incentive distribution rights. Accordingly, we consolidated the financial statements of AGP into our condensed consolidated financial statements. Our consolidated VIE’s operating results and asset balances are presented separately in Note 7 – Operating Segment Information. As the general partner for AGP, we have unlimited liability for the obligations of AGP except for those contractual obligations that are expressly made without recourse to the general partner. The non-controlling interest in AGP is reflected as (income) loss attributable to non-controlling interests in the condensed consolidated statements of operations and as a component of unitholders’ equity on the condensed consolidated balance sheets. All intercompany transactions have been eliminated.
Liquidity, Capital Resources, and Ability to Continue as a Going Concern	Liquidity, Capital Resources, and Ability to Continue as a Going Concern Our primary sources of liquidity are cash distributions received with respect to our ownership interests in AGP, Lightfoot, and Titan and AGP’s annual management fee. However, neither Titan nor AGP are currently paying distributions. In addition, Lightfoot completed a portion of its sale transaction that will result in significantly lower quarterly distributions to us. Our primary cash requirements, in addition to normal operating expenses, are for debt service and capital expenditures, which we expect to fund through operating cash flow, and cash distributions received. Accordingly, our sources of liquidity are currently not sufficient to satisfy the obligations under our credit agreements. The significant risks and uncertainties related to our primary sources of liquidity raise substantial doubt about our ability to continue as a going concern. We continue to face significant liquidity issues and are currently considering, and are likely to make, changes to our capital structure to maintain sufficient liquidity, meet our debt obligations and manage and strengthen our balance sheet. Without a further extension from our lenders or other significant transaction or capital infusion, we do not expect to have sufficient liquidity to repay our first lien credit agreement at June 30, 2018, and as a result, there is substantial doubt regarding our ability to continue as a going concern. The amounts outstanding under our credit agreements were classified as current liabilities as both obligations are due within one year from the balance sheet date. In total, we have $84.5 million of outstanding indebtedness under our credit agreements, which is net of $0.6 million of debt discounts and $0.1 million of deferred financing costs, as current portion of long term debt, net on our condensed consolidated balance sheet as of March 31, 2018. We continually monitor capital markets and may make changes to our capital structures from time to time, with the goal of maintaining financial flexibility, preserving or improving liquidity, strengthening the balance sheet, meeting debt service obligations and/or achieving cost efficiency. For example, we could pursue options such as refinancing or reorganizing our indebtedness or capital structure or seek to raise additional capital through debt or equity financing to address our liquidity concerns and high debt levels. There is no certainty that we will be able to implement any such options, and we cannot provide any assurances that any refinancing or changes to our debt or equity capital structure would be possible or that additional equity or debt financing could be obtained on acceptable terms, if at all, and such options may result in a wide range of outcomes for our stakeholders, including cancellation of debt income (“CODI”) which would be directly allocated to our unitholders and reported on such unitholders’ separate returns. It is possible additional adjustments to our strategic plan and outlook may occur based on market conditions and our needs at that time, which could include selling assets or seeking additional partners to develop our assets. Our condensed consolidated financial statements have been prepared on a going concern basis of accounting, which contemplates continuity of operations, realization of assets, and satisfaction of liabilities and commitments in the normal course of business. Our condensed consolidated financial statements do not include any adjustments that might result from the outcome of the going concern uncertainty. If we cannot continue as a going concern, adjustments to the carrying values and classification of our assets and liabilities and the reported amounts of income and expenses could be required and could be material.
Use of Estimates	Use of Estimates The preparation of our condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities that exist at the date of our condensed consolidated financial statements, as well as the reported amounts of revenue and costs and expenses during the reporting periods. Our condensed consolidated financial statements are based on a number of significant estimates, including revenue and expense accruals, depletion of gas and oil properties and the fair value of derivative instruments. The natural gas industry principally conducts its business by processing actual transactions as many as 60 days after the month of delivery. Consequently, the most recent two months’ financial results were recorded using estimated volumes and contract market prices. Actual results could differ from those estimates.
Derivative Instruments	Derivative Instruments We enter into certain financial contracts to manage our exposure to movement in commodity prices. The derivative instruments recorded in the condensed consolidated balance sheets are measured as either an asset or liability at fair value. Changes in the fair value of derivative instruments are recognized currently within gain (loss) on mark-to-market derivatives in our condensed consolidated statements of operations. We use a market approach fair value methodology to value the assets and liabilities for our outstanding derivative instruments. We manage and report derivative assets and liabilities on the basis of our exposure to market risks and credit risks by counterparty. Commodity derivative instruments are valued based on observable market data related to the change in price of the underlying commodity and are therefore defined as Level 2 assets and liabilities within the same class of nature and risk. These derivative values were calculated by utilizing commodity indices, quoted prices for futures and options contracts traded on open markets that coincide with the underlying commodity, expiration period, strike price (if applicable) and pricing formula utilized in the derivative instrument. The following table summarizes the commodity derivative activity for the period indicated (in thousands): Three Months Ended March 31, 2018 2017 Gains (losses) recognized on cash settlement $ (49 ) $ 52 Changes in fair value on open derivative contracts (237 ) 705 Gain (loss) on mark-to-market derivatives $ (286 ) $ 757 As of March 31, 2018, we had commodity derivatives for 74,500 barrels at an average fixed price of $52.51. The fair value of our commodity derivatives was a liability of $0.6 million as of March 31, 2018.
Revenue Recognition	Revenue Recognition On January 1, 2018, we adopted ASU No. 2014–09, Revenue from Contracts with Customers Oil, Natural Gas, and NGL Revenues Our revenues are derived from the sale of oil, natural gas, and NGLs, which is recognized in the period that the performance obligations are satisfied. We generally consider the delivery of each unit (Bbl or MMBtu) to be separately identifiable and represents a distinct performance obligation that is satisfied at a point-in-time once control of the product has been transferred to the customer upon delivery to an agreed upon delivery point. Transfer of control typically occurs when the products are delivered to the purchaser, and title has transferred. Revenue is recognized net of royalties due to third parties in an amount that reflects the consideration we expect to receive in exchange for those products. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, and that are collected by us from a customer, are excluded from revenue. Payment is generally received one month after the sale has occurred. Our oil production is primarily sold under market-sensitive contracts that are typically priced at a differential to the New York Mercantile Exchange (“NYMEX”) price or at purchaser posted prices for the producing area. For oil contracts, we generally record sales based on the net amount received. Our natural gas production is primarily sold under market-sensitive contracts that are typically priced at a differential to the published natural gas index price for the producing area due to the natural gas quality and the proximity to major consuming markets. For natural gas contracts, we generally record wet gas sales (which consists of natural gas and NGLs based on end products after processing) at the wellhead or inlet of the plant as revenues net of transportation, gathering and processing expenses if the processor is the customer and there is no redelivery of commodities to us at the tailgate of the plant. Conversely, we generally record residual natural gas and NGL sales at the tailgate of the plant on a gross basis along with the associated transportation, gathering and processing expenses if the processor is a service provider and there is redelivery of commodities to us at the tailgate of the plant. All facts and circumstances of an arrangement are considered and judgment is often required in making this determination. Transaction Price Allocated to Remaining Performance Obligations A significant number of our product sales are short-term in nature generally through evergreen contracts with contract terms of one year or less. These contracts typically automatically renew under the same provisions. For those contracts, we have utilized the practical expedient allowed in the new revenue standard that exempts us from disclosure of the transaction price allocated to remaining performance obligations if the performance obligation is part of a contract that has an original expected duration of one year or less. For product sales that have a contract term greater than one year, we have utilized the practical expedient that exempts us from disclosure of the transaction price allocated to remaining performance obligations if the variable consideration is allocated entirely to a wholly unsatisfied performance obligation. Under these sales contracts, each unit of product generally represents a separate performance obligation; therefore, future volumes are wholly unsatisfied and disclosure of the transaction price allocated to remaining performance obligations is not required. Currently, our product sales that have a contractual term greater than one year have no long-term fixed consideration. Contract Balances Under our sales contracts, customers are invoiced once performance obligations have been satisfied, at which point payment is unconditional. Accordingly, our product sales contracts do not give rise to contract assets or liabilities. Accounts receivable attributable to our revenue contracts with customers was $0.5 million and $0.6 million at March 31, 2018 and December 31, 2017, respectively.
Equity Method Investments	Equity Method Investments Investment in Titan . Titan is a VIE based on its limited liability company agreement and the delegation of management and omnibus agreements between Titan and Titan Management, which provide us the power to direct activities that most significantly impact Titan’s economic performance, but we do not have a controlling financial interest. As a result, we do not consolidate Titan but rather apply the equity method of accounting as we have the ability to exercise significant influence over Titan’s operating and financial decisions. At March 31, 2018, we had a 2% Series A Preferred interest in Titan. As of March 31, 2018 and December 31, 2017, the net carrying amount of our investment in Titan was zero. During the three months ended March 31, 2018 and 2017, we recognized equity income of zero and $0.5 million, respectively, within other revenues, net on our condensed consolidated statements of operations. Investment in Lightfoot. At March 31, 2018, we had an approximate 12.0% interest in Lightfoot L.P. and an approximate 15.9% interest in Lightfoot G.P., the general partner of Lightfoot L.P. We account for our investment in Lightfoot under the equity method of accounting due to our ability to exercise significant influence over Lightfoot’s operating and financial decisions. As of March 31, 2018 and December 31, 2017, the net carrying amount of our investment in Lightfoot was zero. During the three months ended March 31, 2018 and 2017, we recognized equity income of zero and $0.2 million, respectively, within other revenues, net on our condensed consolidated statements of operations. During the three months ended March 31, 2018 and 2017, we received cash distributions of approximately zero and $0.4 million, respectively. On August 29, 2017, Lightfoot G.P., Lightfoot L.P. and Lightfoot’s subsidiary, Arc Logistics Partners LP (NYSE: ARCX) (“Arc Logistics”), entered into a Purchase Agreement and Plan of Merger (the “Merger Agreement”) with Zenith Energy U.S., L.P. (together with its affiliates, “Zenith”), a portfolio company of Warburg Pincus, pursuant to which Zenith will acquire Arc Logistics GP LLC (“Arc GP”), the general partner of Arc Logistics (the “GP Transfer”), and all of the outstanding common units of Arc Logistics (the “Merger” and, together with the GP Transfer, the “Proposed Transaction”). Under the terms of the Merger Agreement, Lightfoot L.P. will receive $14.50 per common unit of Arc Logistics in cash for the approximately 5.2 million common units held by it. Lightfoot G.P. will receive $94.5 million for 100% of the membership interests in Arc GP. In December 2017, Lightfoot closed on a portion of the Proposed Transaction which resulted in a net distribution to us of $21.6 million. We used the net proceeds to pay down $21.6 million of our first lien credit agreement. The remaining part of the Proposed Transaction is subject to the closing of the purchase by Zenith of a 5.51646 % interest (and, subject to certain conditions, an additional 4.16154% interest) in Gulf LNG Holdings Group, LLC (“Gulf LNG”), which owns a liquefied natural gas regasification and storage facility in Pascagoula, Mississippi, from LCP LNG Holdings, LLC, a subsidiary of Lightfoot L.P. (“LCP’). We anticipate receiving net proceeds of approximately $3.0 million from LCP selling its interest in Gulf LNG, which is targeted to close in the second quarter of 2018, and we anticipate using the net proceeds to pay down a portion of our first lien credit agreement. Interest in Joliet Terminal In connection with the closing of the first portion of Lightfoot’s Proposed Transaction in December 2017, we acquired a 1.8% ownership interest in Zenith Energy Terminals Joliet Holdings, LLC (“Joliet Terminal”) for $3.3 million, which is included within other assets, net, on our condensed consolidated balance sheets as of March 31, 2018 and December 31, 2017. Our investment in Joliet Terminal is classified as a nonmarketable equity security without a readily determinable fair value and is recorded at cost, less impairment, if any, in accordance with the accounting guidance measurement alternative. If an observable event occurs, we would estimate the fair value of our investment based on Level 2 inputs that could be derived from observable price changes of similar securities adjusted for insignificant differences in rights and obligations and the changes in value would be recorded in other revenues, net on our condensed consolidated statement of operations. Interest in Osprey Sponsor At March 31, 2018, we have a membership interest in Osprey Sponsor, which is the sponsor of Osprey. We received our membership interest in recognition of potential utilization, if any, of our office space, advisory services and personnel by Osprey. On July 26, 2017, Osprey, for which certain of our executives, namely Jonathan Cohen, Edward Cohen and Daniel Herz, serve as CEO, Executive Chairman and President, respectively, consummated its initial public offering. Osprey was formed for the purpose of acquiring, through a merger, capital stock exchange, asset acquisition, stock purchase, reorganization, or other similar business transaction, one or more operating businesses or assets. The initial public offering, including the overallotment exercised by the underwriters, generated net proceeds of $275 million through the issuance of 27.5 million units, which were contributed to a trust account and are intended to be applied generally toward consummating a business combination. Our membership interest in Osprey Sponsor is an allocation of 1,250,000 founder shares, consisting of 1,250,000 shares of Class B common stock of Osprey that are automatically convertible into Class A common stock of Osprey upon the consummation of a business combination on a one-for-one basis. Additionally, another 125,000 founder shares have been allocated to our employees other than Messrs. Cohen, Cohen and Herz. Pursuant to the Osprey Sponsor limited liability company agreement, owners of the founder shares agree to (i) vote their shares in favor of approving a business combination, (ii) waive their redemption rights in connection with the consummation of a business combination, and (iii) waive their rights to liquidating distributions from the trust account if Osprey fails to consummate a business combination. In addition, Osprey Sponsor has agreed to not to transfer, assign or sell any of the founder shares until the earlier of (i) one year after the date of the consummation of a business combination, or (ii) the date on which the last sales price of Osprey’s common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations and recapitalizations) for any 20 trading days within any 30-trading day period commencing 150 days after a business combination, or earlier, in each case, if subsequent to a business combination, Osprey consummates a subsequent liquidation, merger, stock exchange, reorganization or other similar transaction which results in all of Osprey’s stockholders having the right to exchange their common stock for cash, securities or other property. On June 4, 2018, Osprey entered into a definitive agreement to acquire the assets of Royal Resources (“Royal”), an entity owned by funds managed by Blackstone Energy Partners and Blackstone Capital Partners (“Blackstone”), (the “Business Combination”). The acquired Royal assets represent the entirety of Blackstone’s mineral interests in the Eagle Ford Shale. The combined company will be named Falcon Minerals Corporation and will be led by Osprey’s management team . We have determined that Osprey Sponsor is a VIE based on its limited liability company agreement. Through our direct interest and indirectly through the interests of our related parties, we have certain characteristics of a controlling financial interest and the power to direct activities that most significantly impact Osprey Sponsor’s economic performance; however, we are not the primary beneficiary. As a result, we do not consolidate Osprey Sponsor but rather apply the equity method of accounting as we, through our direct interest and indirectly through the interests of our related parties, have the ability to exercise significant influence over Osprey Sponsor’s operating and financial decisions. As of March 31, 2018 and December 31, 2017, the net carrying amount of our interest in Osprey Sponsor was zero as our membership interest was received in recognition of potential utilization, if any, of our office space, advisory services and personnel by Osprey, and we have provided a nominal amount of services to Osprey as of March 31, 2018. During the three months ended March 31, 2018, we did not recognize any equity method income as Osprey Sponsor has no operations.
Rabbi Trust	Rabbi Trust In 2011, we established an excess 401(k) plan relating to certain executives. In connection with the plan, we established a “rabbi” trust for the contributed amounts. At March 31, 2018 and December 31, 2017, we reflected $0.2 million and $1.5 million, respectively, related to the value of the rabbi trust within other assets, net on our condensed consolidated balance sheets, and recorded corresponding liabilities of $0.2 million and $1.5 million, respectively, as of those same dates, within asset retirement obligations and other on our condensed consolidated balance sheets. During the three months ended March 31, 2018 and 2017, we distributed $1.3 million and $2.1 million, respectively, to certain executives related to the rabbi trust.
Accrued Liabilities	Accrued Liabilities We had $3.7 million and $6.6 million of accrued payroll and benefit items at March 31, 2018 and December 31, 2017, respectively, which were included within accrued liabilities on our condensed consolidated balance sheets.
Net Income (Loss) Per Common Unit	Net Income (Loss) Per Common Unit Basic net income (loss) attributable to common unitholders per unit is computed by dividing net income (loss) attributable to common unitholders, which is determined after the deduction of net income attributable to participating securities and the preferred unitholders’ interests, if applicable, by the weighted average number of common units outstanding during the period. Unvested unit-based payment awards that contain non-forfeitable rights to dividends or dividend equivalents (whether paid or unpaid) are participating securities. A portion of our phantom unit awards, which consist of common units issuable under the terms of our long-term incentive plans and incentive compensation agreements, contain non-forfeitable rights to distribution equivalents. The participation rights result in a non-contingent transfer of value each time we declare a distribution or distribution equivalent right during the award’s vesting period. However, unless the contractual terms of the participating securities require the holders to share in the losses of the entity, net loss is not allocated to the participating securities. As such, the net income utilized in the calculation of net income (loss) per unit must be after the allocation of only net income to the phantom units on a pro-rata basis. The following is a reconciliation of net income (loss) allocated to the common unitholders for purposes of calculating net income (loss) attributable to common unitholders per unit (in thousands): Three Months Ended March 31, 2018 2017 Net loss $ (6,962 ) $ (4,903 ) Preferred unitholders’ dividends — — Loss attributable to non-controlling interests 894 281 Net loss attributable to common unitholders (6,068 ) (4,622 ) Less: Net income attributable to participating securities – phantom units (1) — — Net loss utilized in the calculation of net loss attributable to common unitholders per unit – diluted $ (6,068 ) $ (4,622 ) (1) Net income (loss) attributable to common unitholders for the net income (loss) attributable to common unitholders per unit calculation is net income (loss) attributable to common unitholders, less income allocable to participating securities. For the three months ended March 31, 2018 and 2017, net loss attributable to common unitholder’s ownership interest was not allocated to 12,000 and 178,000 phantom units, respectively, because the contractual terms of the phantom units as participating securities do not require the holders to share in the losses of the entity. Diluted net income (loss) attributable to common unitholders per unit is calculated by dividing net income (loss) attributable to common unitholders, less income allocable to participating securities, by the sum of the weighted average number of common unitholder units outstanding and the dilutive effect of unit option awards and convertible preferred units, as calculated by the treasury stock or if converted methods, as applicable. Unit options consist of common units issuable upon payment of an exercise price by the participant under the terms of our long-term incentive plan. The following table sets forth the reconciliation of our weighted average number of common units used to compute basic net loss attributable to common unitholders per unit with those used to compute diluted net loss attributable to common unitholders per unit (in thousands): Three Months Ended March 31, 2018 2017 Weighted average number of common units—basic 31,973 26,062 Add effect of dilutive incentive awards (1) — — Add effect of dilutive convertible preferred units and warrants (2) — — Weighted average number of common units—diluted 31,973 26,062 (1) For the three months ended March 31, 2018 and 2017, approximately 2,299,000 and 3,521,000 phantom units, respectively, were excluded from the computation of diluted net income (loss) attributable to common unitholders per unit, because the inclusion of such units would have been anti-dilutive. (2) For the three months ended March 31, 2018 and 2017, our warrants issued in connection with the second lien credit agreement were excluded from the computation of diluted earnings attributable to common unitholders per unit because the inclusion of such warrants would have been anti-dilutive. For the three months ended March 31, 2017, our convertible Series A Preferred Units were excluded from the computation of diluted earnings attributable to common unitholders per unit, because the inclusion of such units would have been anti-dilutive.
Recently Issued Accounting Standards	Recently Issued Accounting Standards In February 2016, the Financial Accounting Standards Board (“FASB”) updated the accounting guidance related to leases. The updated accounting guidance requires lessees to recognize a lease asset and liability at the commencement date of all leases (with the exception of short-term leases), initially measured at the present value of the lease payments. The updated guidance is effective for us as of January 1, 2019 and requires a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest period presented. We are currently in the process of determining the impact that the updated accounting guidance will have on our condensed consolidated financial statements. In January 2016, the FASB updated the accounting guidance related to the recognition and measurement of financial assets and financial liabilities. The updated accounting guidance, among other things, requires that all nonconsolidated equity investments, except those accounted for under the equity method, be measured at fair value and that the changes in fair value be recognized in net income. The accounting guidance requires nonmarketable equity securities to be recorded at cost and adjusted to fair value at each reporting period. However, the guidance allows for a measurement alternative, which is to record the investments at cost, less impairment, if any, and subsequently adjust for observable price changes of identical or similar investments of the same issuer. We adopted the new accounting guidance on January 1, 2018 and applied the measurement alternative to our interest in Joliet Terminal as there is not a readily determinable fair value for our investment.

Basis of Presentation and Sum14

Basis of Presentation and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Summary of Commodity Derivative Activity	The following table summarizes the commodity derivative activity for the period indicated (in thousands): Three Months Ended March 31, 2018 2017 Gains (losses) recognized on cash settlement $ (49 ) $ 52 Changes in fair value on open derivative contracts (237 ) 705 Gain (loss) on mark-to-market derivatives $ (286 ) $ 757
Schedule of Net Income (Loss) Reconciliation	The following is a reconciliation of net income (loss) allocated to the common unitholders for purposes of calculating net income (loss) attributable to common unitholders per unit (in thousands): Three Months Ended March 31, 2018 2017 Net loss $ (6,962 ) $ (4,903 ) Preferred unitholders’ dividends — — Loss attributable to non-controlling interests 894 281 Net loss attributable to common unitholders (6,068 ) (4,622 ) Less: Net income attributable to participating securities – phantom units (1) — — Net loss utilized in the calculation of net loss attributable to common unitholders per unit – diluted $ (6,068 ) $ (4,622 ) (1) Net income (loss) attributable to common unitholders for the net income (loss) attributable to common unitholders per unit calculation is net income (loss) attributable to common unitholders, less income allocable to participating securities. For the three months ended March 31, 2018 and 2017, net loss attributable to common unitholder’s ownership interest was not allocated to 12,000 and 178,000 phantom units, respectively, because the contractual terms of the phantom units as participating securities do not require the holders to share in the losses of the entity.
Reconciliation of Weighted Average Number of Common Unit holder Units	The following table sets forth the reconciliation of our weighted average number of common units used to compute basic net loss attributable to common unitholders per unit with those used to compute diluted net loss attributable to common unitholders per unit (in thousands): Three Months Ended March 31, 2018 2017 Weighted average number of common units—basic 31,973 26,062 Add effect of dilutive incentive awards (1) — — Add effect of dilutive convertible preferred units and warrants (2) — — Weighted average number of common units—diluted 31,973 26,062 (1) For the three months ended March 31, 2018 and 2017, approximately 2,299,000 and 3,521,000 phantom units, respectively, were excluded from the computation of diluted net income (loss) attributable to common unitholders per unit, because the inclusion of such units would have been anti-dilutive. (2) For the three months ended March 31, 2018 and 2017, our warrants issued in connection with the second lien credit agreement were excluded from the computation of diluted earnings attributable to common unitholders per unit because the inclusion of such warrants would have been anti-dilutive. For the three months ended March 31, 2017, our convertible Series A Preferred Units were excluded from the computation of diluted earnings attributable to common unitholders per unit, because the inclusion of such units would have been anti-dilutive.

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	3 Months Ended
	Mar. 31, 2018
Property Plant And Equipment [Abstract]
Summary of Property, Plant and Equipment	The following is a summary of property, plant and equipment at the dates indicated (in thousands): March 31, 2018 December 31, 2017 Natural gas and oil properties: Proved properties $ 152,581 $ 147,932 Support equipment and other 3,180 3,188 155,761 151,120 Less – accumulated depreciation, depletion and amortization (86,798 ) (85,827 ) $ 68,963 $ 65,293

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule of Total Long-term Debt Instruments	Total debt consists of the following at the dates indicated (in thousands): March 31, December 31, 2018 2017 First Lien Credit Agreement $ 21,232 $ 20,666 Second Lien Credit Agreement 63,958 59,552 Debt discount, net of accumulated amortization of $1,245 and $1,090 (622 ) (778 ) Deferred financing costs, net of accumulated amortization of $2,747 and $2,704, respectively (101 ) (90 ) Total debt, net 84,467 79,350 Less current maturities (84,467 ) (79,350 ) Total long-term debt, net $ — $ —

Operating Segment Information (

Operating Segment Information (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Operating Segment Data	Our operations include two reportable operating segments: AGP and corporate and other. These operating segments reflected the way we managed our operations and made business decisions. Corporate and other includes our equity investments in Lightfoot (see Note 2) and Titan (see Note 2), as well as our general and administrative and interest expenses. Operating segment data for the periods indicated were as follows (in thousands): Three Months Ended March 31, 2018 2017 Atlas Growth Partners: Revenues (1) $ 1,484 $ 3,153 Operating costs and expenses (1,437 ) (2,333 ) Depreciation, depletion and amortization expense (975 ) (1,112 ) Segment loss $ (928 ) $ (292 ) Corporate and other: Revenues $ 47 $ 722 General and administrative (754 ) (404 ) Interest expense (5,327 ) (4,929 ) Segment loss $ (6,034 ) $ (4,611 ) Reconciliation of segment loss to net loss: Segment loss: Atlas Growth Partners (928 ) (292 ) Corporate and other (6,034 ) (4,611 ) Net loss $ (6,962 ) $ (4,903 ) Reconciliation of segment revenues to total revenues: Segment revenues: Atlas Growth Partners 1,484 3,153 Corporate and other 47 722 Total revenues $ 1,531 $ 3,875 Capital expenditures: Atlas Growth Partners 225 — Total capital expenditures $ 225 $ — March 31, December 31, 2018 2017 Balance sheet: Total assets: Atlas Growth Partners $ 76,597 $ 74,219 Corporate and other 5,606 9,829 Total assets $ 82,203 $ 84,048

Organization (Narrative) (Detai

Organization (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018shares
Organization [Line Items]
Common units issued	31,973,518
Common units outstanding	31,973,518
Lightfoot Capital Partners, LP
Organization [Line Items]
General partner ownership interest	15.90%
Common limited partner ownership interest	12.00%
Atlas Growth Partners, L.P
Organization [Line Items]
General partner ownership interest	80.00%
Common limited partner ownership interest	2.10%
Titan
Organization [Line Items]
Percentage of preferred share	2.00%
Percentage of common equity interest	2.00%
Titan | Series A Preferred Units
Organization [Line Items]
Percentage of preferred share	2.00%

Basis of Presentation and Sum19

Basis of Presentation and Summary of Significant Accounting Policies (Narrative) (Details)	Aug. 29, 2017USD ($)$ / sharesshares	Jul. 26, 2017USD ($)shares	Dec. 31, 2017USD ($)	Mar. 31, 2018USD ($)bbl$ / shares$ / bblshares	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)	Jun. 04, 2018	Jan. 01, 2018USD ($)
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment			$ (83,032,000)	$ (88,850,000)		$ (83,032,000)
Revenue from contract with customers, payment term				1 month
Accounts receivable to revenue contracts with customers			600,000	$ 500,000		600,000
Distributions received from unconsolidated companies					$ 404,000
Other assets, net			5,102,000	3,771,000		5,102,000
Other liabilities recorded			1,968,000	640,000		1,968,000
Rabbi trust
Summary Of Significant Accounting Policies [Line Items]
Other assets, net			1,500,000	200,000		1,500,000
Other liabilities recorded			1,500,000	200,000		1,500,000
Partnership distributed to executives				1,300,000	2,100,000
Subsequent Event | Blackstone
Summary Of Significant Accounting Policies [Line Items]
Ownership percentage							47.00%
Accrued Liabilities
Summary Of Significant Accounting Policies [Line Items]
Accrued payroll and benefit items			6,600,000	$ 3,700,000		6,600,000
First Lien Credit Agreement
Summary Of Significant Accounting Policies [Line Items]
Repayment of credit facility			21,600,000
Osprey Energy Acquisition Corp
Summary Of Significant Accounting Policies [Line Items]
Net proceeds from initial public offering		$ 275,000,000
Issuance of units in initial public offering | shares		27,500,000
Common stock, conversion basis				one-for-one
Number of founder shares allocated to employees | shares				125,000
Terms of agreement				Osprey Sponsor has agreed to not to transfer, assign or sell any of the founder shares until the earlier of (i) one year after the date of the consummation of a business combination, or (ii) the date on which the last sales price of Osprey’s common stock equals or exceeds $12.00 per share (as adjusted for stock splits, stock dividends, reorganizations and recapitalizations) for any 20 trading days within any 30-trading day period commencing 150 days after a business combination, or earlier, in each case, if subsequent to a business combination, Osprey consummates a subsequent liquidation, merger, stock exchange, reorganization or other similar transaction which results in all of Osprey’s stockholders having the right to exchange their common stock for cash, securities or other property.
Threshold of common stock sales price per share | $ / shares				$ 12
Osprey Sponsor, LLC
Summary Of Significant Accounting Policies [Line Items]
Net carrying amount of investment			0	$ 0		0
Equity method income (loss)				0
Merger Agreement | LCP LP | Arc GP
Summary Of Significant Accounting Policies [Line Items]
Receivable price per common unit in cash | $ / shares	$ 14.50
Number of common unit held | shares	5,200,000
Merger Agreement | LCP GP | Arc GP
Summary Of Significant Accounting Policies [Line Items]
Price receivable as net proceeds for common unit held	$ 94,500,000
Percentage of membership interests	100.00%
Lightfoot Capital Partners, LP
Summary Of Significant Accounting Policies [Line Items]
Net carrying amount of investment			0	0		0
Equity method income (loss)				$ 0	200,000
Common limited partner ownership interest				12.00%
General partner ownership interest				15.90%
Distributions received from unconsolidated companies			$ 21,600,000	$ 0	400,000
Gulf L N G Holdings Group L L C
Summary Of Significant Accounting Policies [Line Items]
Common limited partner ownership interest				5.51646%
Common limited partner additional ownership interest				4.16154%
Gulf L N G Holdings Group L L C | LCP LP
Summary Of Significant Accounting Policies [Line Items]
Net proceeds from equity method investments				$ 3,000,000
Zenith Energy Terminals Joliet Holdings, LLC
Summary Of Significant Accounting Policies [Line Items]
Common limited partner ownership interest			1.80%
Zenith Energy Terminals Joliet Holdings, LLC | Other Assets
Summary Of Significant Accounting Policies [Line Items]
Payments to acquire ownership interests				$ 3,300,000		3,300,000
Class B common stock | Osprey Energy Acquisition Corp
Summary Of Significant Accounting Policies [Line Items]
Founder shares allocated for membership interest | shares				1,250,000
Titan
Summary Of Significant Accounting Policies [Line Items]
Net carrying amount of investment			$ 0	$ 0		$ 0
Equity method income (loss)				$ 0	$ 500,000
Titan | Series A Preferred Units
Summary Of Significant Accounting Policies [Line Items]
Equity method investment percentage				2.00%
ASU No. 2014-09 | Cumulative Effect Adoption 606
Summary Of Significant Accounting Policies [Line Items]
Cumulative effect adjustment								$ 0
Commodity Derivatives
Summary Of Significant Accounting Policies [Line Items]
Commodity derivatives, volume | bbl				74,500
Average fixed price | $ / bbl				52.51
Fair value of commodity derivatives liability				$ 600,000
Credit Agreements
Summary Of Significant Accounting Policies [Line Items]
Outstanding indebtedness				84,500,000
Debt discounts				600,000
Deferred financing costs				$ 100,000
Credit Agreements | Maximum
Summary Of Significant Accounting Policies [Line Items]
Credit agreement term				1 year

Basis of Presentation and Sum20

Basis of Presentation and Summary of Significant Accounting Policies (Summary of Commodity Derivative Activity) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gains (losses) recognized on cash settlement	$ (49)	$ 52
Changes in fair value on open derivative contracts	(237)	705
Gain (loss) on mark-to-market derivatives	$ (286)	$ 757

Basis of Presentation and Sum21

Basis of Presentation and Summary of Significant Accounting Policies (Schedule of Net Income (Loss) Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reconciliation Of Net Income Loss [Line Items]
Net loss	$ (6,962)	$ (4,903)
Loss attributable to non-controlling interests	894	281
Net loss attributable to common unitholders	(6,068)	(4,622)
Net loss utilized in the calculation of net loss attributable to common unitholders per unit – diluted	$ (6,068)	$ (4,622)
Antidilutive Phantom Unit Securities Excluded from Computation of Diluted Earnings Attributable to Common Unit Holders Outstanding Units	12,000	178,000

Basis of Presentation and Sum22

Basis of Presentation and Summary of Significant Accounting Policies (Reconciliation of Weighted Average Number of Common Unit Holder Units) (Details) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accounting Policies [Abstract]
Basic	31,973,000	26,062,000
Weighted average number of common units—diluted	31,973,000	26,062,000
Antidilutive Securities Excluded From Computation Of Diluted Net Income (Loss) Attributable To Common Limited Partners Outstanding Units	2,299,000	3,521,000

Property, Plant and Equipment23

Property, Plant and Equipment (Summary of Property, Plant and Equipment) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Abstract]
Proved properties	$ 152,581	$ 147,932
Support equipment and other	3,180	3,188
Total natural gas and oil properties	155,761	151,120
Less – accumulated depreciation, depletion and amortization	(86,798)	(85,827)
Property, plant and equipment, Net, Total	$ 68,963	$ 65,293

Property, Plant and Equipment24

Property, Plant and Equipment (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Property Plant And Equipment [Abstract]
Non-cash investing activities capital expenditures	$ 4,400,000	$ 0

Debt (Schedule of Total Debt Ou

Debt (Schedule of Total Debt Outstanding) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Debt discount, net of accumulated amortization	$ (622)	$ (778)
Total debt, net	84,467	79,350
Less current maturities	(84,467)	(79,350)
Atlas Energy
Debt Instrument [Line Items]
Deferred financing costs, net of accumulated amortization	(101)	(90)
Atlas Energy | First Lien Credit Agreement
Debt Instrument [Line Items]
Term loans	21,232	20,666
Atlas Energy | Second lien term loan facility
Debt Instrument [Line Items]
Term loans	$ 63,958	$ 59,552

Debt (Schedule of Total Debt 26

Debt (Schedule of Total Debt Outstanding) (Parenthetical) (Details) - Atlas Energy - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Accumulated amortization of debt discount	$ 1,245	$ 1,090
Accumulated amortization of deferred financing costs	$ 2,747	$ 2,704

Debt (Narrative) (Details)

Debt (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Debt Instrument [Line Items]
Cash Payments For Interest On Debt	$ 0.2	$ 0.2
Credit Agreements | Level 1
Debt Instrument [Line Items]
Long-term debt	$ 84.6

Debt (Credit Agreements) (Detai

Debt (Credit Agreements) (Details) - USD ($) $ in Millions	3 Months Ended	7 Months Ended
	Mar. 31, 2018	Apr. 26, 2018	Apr. 27, 2016
Officer
Debt Instrument [Line Items]
Percentage of lenders participated in loan syndication	12.00%
Minimum | Unitholders
Debt Instrument [Line Items]
Percentage of lenders participated in loan syndication	5.00%
Credit Agreements
Debt Instrument [Line Items]
Outstanding indebtedness	$ 84.5
Debt discounts	0.6
Deferred financing costs	0.1
First Lien Credit Agreement | Credit Agreements | Alternative Base Rate
Debt Instrument [Line Items]
Cash interest rate margin		0.50%
Payable-in-kind interest payment percentage		11.00%
First Lien Credit Agreement | Credit Agreements | Eurodollar Loans
Debt Instrument [Line Items]
Cash interest rate margin		1.50%
Second lien term loan facility
Debt Instrument [Line Items]
Debt Instrument, Unamortized Discount	$ 0.6
Warrants issued			4,668,044
Second lien term loan facility | Credit Agreements
Debt Instrument [Line Items]
Borrowings bearing interest rate	30.00%

Certain Relationships and Rel29

Certain Relationships and Related Party Transactions (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Titan
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	$ 11,100,000
Titan | Scenario, Forecast
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current			$ 9,600,000
Relationship with AGP
Related Party Transaction [Line Items]
Percentage of capital contribution	1.00%
Payment for management fee	$ 600,000	$ 600,000
Relationship with Lightfoot | Jonathan Cohen
Related Party Transaction [Line Items]
Percentage of distributions receives excluding return of capital	10.00%
Compensation paid	$ 0	$ 100,000
Relationship with Titan
Related Party Transaction [Line Items]
Accounts Payable, Related Parties, Current	100,000			$ 100,000
Accounts Receivable, Related Parties, Current	$ 100,000			$ 100,000

Commitments and Contingencies (

Commitments and Contingencies (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Environmental remediation expense	$ 0	$ 0

Operating Segment Information31

Operating Segment Information (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018Segment
Segment Reporting [Abstract]
Number of reportable operating segments	2

Operating Segment Information32

Operating Segment Information (Operating Segment Data) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 1,531	$ 3,875
Depreciation, depletion and amortization expense	(975)	(1,112)
Interest expense	(5,327)	(4,929)
Reportable Legal Entities | Atlas Growth Partners, L.P
Segment Reporting Information [Line Items]
Revenues	1,484	3,153
Operating costs and expenses	(1,437)	(2,333)
Depreciation, depletion and amortization expense	(975)	(1,112)
Segment loss	(928)	(292)
Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Revenues	47	722
General and administrative	(754)	(404)
Interest expense	$ (5,327)	$ (4,929)

Operating Segment Information33

Operating Segment Information (Reconciliation of Segment Loss to Net Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Net loss	$ (6,962)	$ (4,903)
Reportable Legal Entities | Atlas Growth Partners, L.P
Segment Reporting Information [Line Items]
Net loss	(928)	(292)
Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Net loss	$ (6,034)	$ (4,611)

Operating Segment Information34

Operating Segment Information (Reconciliation of Segment Revenues to Total Revenues) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 1,531	$ 3,875
Reportable Legal Entities | Atlas Growth Partners, L.P
Segment Reporting Information [Line Items]
Total revenues	1,484	3,153
Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total revenues	$ 47	$ 722

Operating Segment Information35

Operating Segment Information (Capital Expenditures) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Capital expenditures	$ 225
Reportable Legal Entities | Atlas Growth Partners, L.P
Segment Reporting Information [Line Items]
Capital expenditures	$ 225

Operating Segment Information36

Operating Segment Information (Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total assets	$ 82,203	$ 84,048	$ 84,048
Reportable Legal Entities | Atlas Growth Partners, L.P
Segment Reporting Information [Line Items]
Total assets	76,597		74,219
Operating Segments | Corporate and Other
Segment Reporting Information [Line Items]
Total assets	$ 5,606		$ 9,829