Amplify Energy (AMPYW) 10-Q 9 Aug 17 2017 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2017	Aug. 04, 2017
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q2
Trading Symbol	AMPY
Entity Registrant Name	AMPLIFY ENERGY CORP
Entity Central Index Key	1,521,847
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		25,000,000

UNAUDITED CONDENSED CONSOLIDATE

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents		$ 10,951
Restricted cash		7,561
Accounts receivable		29,894
Short-term derivative instruments		53,298
Prepaid expenses and other current assets		8,814
Total current assets		110,518
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		565,899
Support equipment and facilities		100,311
Other		6,007
Accumulated depreciation, depletion and impairment		(8,350)
Property and equipment, net		663,867
Long-term derivative instruments		25,462
Restricted investments		156,566
Other long-term assets		10,212
Total assets		966,625
Current liabilities:
Accounts payable		5,446
Revenues payable		21,681
Accrued liabilities (see Note 4)		33,843
Current portion of long-term debt (see Note 9)	[1]	0
Total current liabilities		60,970
Long-term debt (see Note 9)		418,000
Asset retirement obligations		96,290
Deferred tax liabilities		1,614
Other long-term liabilities		0
Total liabilities		576,874
Commitments and contingencies (see Note 14)
Stockholders'/ partners' equity:
Successor preferred stock, $0.0001 par value: 45,000,000 shares authorized; no shares issued and outstanding at June 30, 2017 and December 31, 2016		0
Successor warrants, 2,173,913 warrants outstanding at June 30, 2017		4,788
Successor common stock, $0.0001 par value: 300,000,000 shares authorized; 25,000,000 shares issued and outstanding at June 30, 2016 and no shares authorized or issued at December 31, 2016		3
Successor additional paid-in capital		385,866
Successor accumulated earnings (deficit)		(906)
Total stockholders' equity		389,751
Total liabilities and equity		$ 966,625
Predecessor [Member]
Current assets:
Cash and cash equivalents			$ 15,373
Restricted cash			0
Accounts receivable			34,584
Short-term derivative instruments			69,464
Prepaid expenses and other current assets			13,163
Total current assets			132,584
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method			3,115,012
Support equipment and facilities			199,093
Other			15,344
Accumulated depreciation, depletion and impairment			(1,749,747)
Property and equipment, net			1,579,702
Long-term derivative instruments			102,630
Restricted investments			156,234
Other long-term assets			2,104
Total assets			1,973,254
Current liabilities:
Accounts payable			4,353
Revenues payable			21,285
Accrued liabilities (see Note 4)			65,235
Current portion of long-term debt (see Note 9)	[1]		1,622,904
Total current liabilities			1,713,777
Long-term debt (see Note 9)			0
Asset retirement obligations			154,913
Deferred tax liabilities			2,280
Other long-term liabilities			2,795
Total liabilities			1,873,765
Commitments and contingencies (see Note 14)
Stockholders'/ partners' equity:
Total partners' equity			99,489
Total liabilities and equity			1,973,254
Limited Partners Common Units [Member] | Predecessor [Member]
Stockholders'/ partners' equity:
Predecessor common units, no units issued or outstanding at June 30, 2017 and 83,827,920 units outstanding at December 31, 2016			99,489
Total partners' equity			$ 99,489
[1]	Due to the existing and anticipated financial covenant violations as of December 31, 2016, the borrowings under the Predecessor’s revolving credit facility and the Notes were classified as current at December 31, 2016. There were no existing or anticipated financial covenant violations as of June 30, 2017.

UNAUDITED CONDENSED CONSOLIDAT3

UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2017	Dec. 31, 2016
Preferred stock, par value	$ 0.0001
Preferred stock, shares authorized	45,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Warrants outstanding	2,173,913
Common stock, par value	$ 0.0001
Common stock, shares authorized	300,000,000	0
Common stock, shares issued	25,000,000	0
Common stock, shares outstanding	25,000,000
Limited Partners Common Units [Member] | Predecessor [Member]
Limited partners, units outstanding		83,827,920

UNAUDITED CONDENSED STATEMENTS

UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED OPERATIONS - USD ($) shares in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Revenues:
Oil and natural gas sales		$ 42,228,000
Other revenues		167,000
Total revenues		42,395,000
Costs and expenses:
Lease operating expense		18,842,000
Gathering, processing, and transportation		4,114,000
Exploration		7,000
Taxes other than income		1,933,000
Depreciation, depletion, and amortization		8,351,000
Impairment of proved oil and natural gas properties		0
General and administrative expense		7,382,000
Accretion of asset retirement obligations		1,027,000
(Gain) loss on commodity derivative instruments		(1,915,000)
(Gain) loss on sale of properties		0
Other, net		0
Total costs and expenses		39,741,000
Operating income (loss)		2,654,000
Other income (expense):
Interest expense, net		(3,797,000)
Other income (expense)		(6,000)
Gain on extinguishment of debt		0
Total other income (expense)		(3,803,000)
Income (loss) before reorganization items, net and income taxes		(1,149,000)
Reorganization items, net		(349,000)
Income tax benefit (expense)		592,000		$ 100,000	$ (200,000)
Net income (loss)		(906,000)
Net income (loss) attributable to Successor/Predecessor		(906,000)
Successor/ Predecessor interest in net income (loss):
Net income (loss) attributable to Successor/Predecessor		(906,000)
Net (income) loss allocated to Predecessor's general partner		0
Net (income) allocated to participating restricted stockholders		0
Net income (loss) available to common stockholders/limited partners		$ (906,000)
Earnings per share/unit: (See Note 11)
Basic and diluted earnings per share/unit		$ (0.04)
Weighted average common shares/units outstanding:
Basic and diluted		25,000
Predecessor [Member]
Revenues:
Oil and natural gas sales	$ 27,686,000		$ 67,780,000	108,970,000	128,403,000
Other revenues	135,000		286,000	231,000	529,000
Total revenues	27,821,000		68,066,000	109,201,000	128,932,000
Costs and expenses:
Lease operating expense	9,582,000		29,354,000	35,568,000	65,050,000
Gathering, processing, and transportation	2,737,000		8,823,000	10,772,000	18,032,000
Exploration	5,000		15,000	21,000	137,000
Taxes other than income	921,000		3,485,000	5,187,000	7,493,000
Depreciation, depletion, and amortization	9,835,000		44,413,000	37,717,000	88,842,000
Impairment of proved oil and natural gas properties	0		0	0	8,342,000
General and administrative expense	8,236,000		15,246,000	31,606,000	28,770,000
Accretion of asset retirement obligations	912,000		2,712,000	3,407,000	5,419,000
(Gain) loss on commodity derivative instruments	(12,835,000)		124,580,000	(23,076,000)	72,835,000
(Gain) loss on sale of properties	0		(3,539,000)	0	(3,635,000)
Other, net	44,000		(52,000)	36,000	67,000
Total costs and expenses	19,437,000		225,037,000	101,238,000	291,352,000
Operating income (loss)	8,384,000		(156,971,000)	7,963,000	(162,420,000)
Other income (expense):
Interest expense, net	(1,843,000)		(32,143,000)	(10,243,000)	(64,695,000)
Other income (expense)	2,000		0	8,000	0
Gain on extinguishment of debt	0		41,664,000	0	41,664,000
Total other income (expense)	(1,841,000)		9,521,000	(10,235,000)	(23,031,000)
Income (loss) before reorganization items, net and income taxes	6,543,000		(147,450,000)	(2,272,000)	(185,451,000)
Reorganization items, net	(81,121,000)		0	(88,774,000)	0
Income tax benefit (expense)	0		(100,000)	91,000	(196,000)
Net income (loss)	(74,578,000)		(147,550,000)	(90,955,000)	(185,647,000)
Net income (loss) attributable to Successor/Predecessor	(74,578,000)		(147,550,000)	(90,955,000)	(185,647,000)
Successor/ Predecessor interest in net income (loss):
Net income (loss) attributable to Successor/Predecessor	(74,578,000)		(147,550,000)	(90,955,000)	(185,647,000)
Net (income) loss allocated to Predecessor's general partner	0		128,000	0	168,000
Net (income) allocated to participating restricted stockholders	0		0	0	0
Net income (loss) available to common stockholders/limited partners	$ (74,578,000)		$ (147,422,000)	$ (90,955,000)	$ (185,479,000)
Earnings per share/unit: (See Note 11)
Basic and diluted earnings per share/unit	$ (0.89)		$ (1.78)	$ (1.09)	$ (2.24)
Weighted average common shares/units outstanding:
Basic and diluted	83,800		83,007	83,807	82,971

UNAUDITED CONDENSED STATEMENTS5

UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED CASH FLOWS - USD ($)	2 Months Ended	4 Months Ended	6 Months Ended
	Jun. 30, 2017	May 04, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ (906,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion, and amortization	8,351,000
Impairment of proved oil and natural gas properties	0
(Gain) loss on derivative instruments	(1,915,000)
Cash settlements (paid) received on expired derivative instruments	8,285,000
Cash settlements (paid) on terminated derivatives	0
Bad debt expense	0
Deferred income tax expense (benefit)	(592,000)
Amortization of deferred financing costs	346,000
Accretion of senior notes discount	0
Gain on extinguishment of debt	0
Accretion of asset retirement obligations	1,027,000
Gain on sale of properties	0
Share/unit-based compensation (see Note 12)	526,000
Settlement of asset retirement obligations	0
Reorganization items, net	0
Other	0
Changes in operating assets and liabilities:
Accounts receivable	3,666,000
Prepaid expenses and other assets	1,378,000
Payables and accrued liabilities	458,000
Restricted cash	0
Other	(80,000)
Net cash provided by operating activities	20,544,000
Cash flows from investing activities:
Additions to oil and gas properties	(9,516,000)
Additions to other property and equipment	0
Additions to restricted investments	(123,000)
Proceeds from the sale of oil and natural gas properties, net of cash and cash equivalents sold	0
Net cash used in investing activities	(9,639,000)
Cash flows from financing activities:
Advances on revolving credit facilities	0
Payments on revolving credit facilities	(12,000,000)
Deferred financing costs	(142,000)
Payment to holders of the Notes	(8,193,000)
Payment to Predecessor common unitholders	(1,250,000)
Contribution from management	1,500,000
Repurchase of senior notes	0
Contributions related to sale of assets to NGP affiliate	0
Transfer of operating subsidiary from Memorial Resource	0
Proceeds from the issuance of Predecessor common units	0
Costs incurred in conjunction with issuance of Predecessor common units	0
Distributions to partners	0
Acquisition of Predecessor's general partner (see Note 1)	0
Acquisition of incentive distribution rights from NGP (see Note 1)	0
Restricted units returned to plan	0
Other	(9,000)
Net cash used in financing activities	(20,094,000)
Net change in cash and cash equivalents	(9,189,000)
Cash and cash equivalents, beginning of period	20,140,000
Cash and cash equivalents, end of period	10,951,000	$ 20,140,000
Predecessor [Member]
Cash flows from operating activities:
Net income (loss)		(90,955,000)	$ (185,647,000)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion, and amortization		37,717,000	88,842,000
Impairment of proved oil and natural gas properties		0	8,342,000
(Gain) loss on derivative instruments		(23,076,000)	78,361,000
Cash settlements (paid) received on expired derivative instruments		15,895,000	146,817,000
Cash settlements (paid) on terminated derivatives		94,146,000	39,299,000
Bad debt expense		0	1,601,000
Deferred income tax expense (benefit)		(74,000)	129,000
Amortization of deferred financing costs		0	2,550,000
Accretion of senior notes discount		0	1,201,000
Gain on extinguishment of debt		0	(41,664,000)
Accretion of asset retirement obligations		3,407,000	5,419,000
Gain on sale of properties		0	(3,635,000)
Share/unit-based compensation (see Note 12)		3,667,000	5,299,000
Settlement of asset retirement obligations		(164,000)	(869,000)
Reorganization items, net		68,356,000	0
Other		56,000	0
Changes in operating assets and liabilities:
Accounts receivable		1,024,000	13,414,000
Prepaid expenses and other assets		735,000	(2,268,000)
Payables and accrued liabilities		15,030,000	(4,460,000)
Restricted cash		(7,561,000)	0
Other		(266,000)	3,241,000
Net cash provided by operating activities		117,937,000	155,972,000
Cash flows from investing activities:
Additions to oil and gas properties		(6,211,000)	(36,553,000)
Additions to other property and equipment		(76,000)	(7,265,000)
Additions to restricted investments		(209,000)	(4,242,000)
Proceeds from the sale of oil and natural gas properties, net of cash and cash equivalents sold		0	37,918,000
Net cash used in investing activities		(6,496,000)	(10,142,000)
Cash flows from financing activities:
Advances on revolving credit facilities		16,600,000	94,358,000
Payments on revolving credit facilities		(98,252,000)	(191,000,000)
Deferred financing costs		(8,575,000)	(1,075,000)
Payment to holders of the Notes		(16,446,000)	0
Payment to Predecessor common unitholders		0	0
Contribution from management		0	0
Repurchase of senior notes		0	(40,470,000)
Contributions related to sale of assets to NGP affiliate		0	26,000
Transfer of operating subsidiary from Memorial Resource		0	2,363,000
Proceeds from the issuance of Predecessor common units		0	1,703,000
Costs incurred in conjunction with issuance of Predecessor common units		0	(146,000)
Distributions to partners		0	(10,797,000)
Acquisition of Predecessor's general partner (see Note 1)		0	(750,000)
Acquisition of incentive distribution rights from NGP (see Note 1)		0	(50,000)
Restricted units returned to plan		(10,000)	(591,000)
Other		9,000	0
Net cash used in financing activities		(106,674,000)	(146,429,000)
Net change in cash and cash equivalents		4,767,000	(599,000)
Cash and cash equivalents, beginning of period	$ 20,140,000	15,373,000	599,000
Cash and cash equivalents, end of period		$ 20,140,000	$ 0

UNAUDITED CONDENSED STATEMENTS6

UNAUDITED CONDENSED STATEMENTS OF CONSOLIDATED EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Warrants [Member]	Additional Paid in Capital [Member]	Accumulated Earnings (Deficit)	Limited Partners Common Units [Member]
Balance (Predecessor [Member]) at Dec. 31, 2016	$ 99,489					$ 99,489
Net income (loss) | Predecessor [Member]	(90,955)					(90,955)
Cancellation and amortization of unit-based awards | Predecessor [Member]						3,713
Restricted units repurchased and other | Predecessor [Member]						(2)
Issuance of common stock to Predecessor common unitholders | Predecessor [Member]						(7,707)
Issuance of warrants to Predecessor common unitholders | Predecessor [Member]						(4,788)
Contribution from management | Predecessor [Member]						1,500
Settlement with Predecessor common unitholders | Predecessor [Member]						(1,250)
Balance (Predecessor [Member]) at May. 04, 2017	80,601					$ 0
Balance at May. 04, 2017	390,140
Issuance of Successor common stock to holders of the Notes	377,645	$ 3	$ 0	$ 377,642	$ 0
Issuance of warrants	4,788	0	4,788	0	0
Issuance of common stock to Predecessor common unitholders | Predecessor [Member]	7,707	0	0	7,707	0
Net income (loss)	(906)
Balance at Jun. 30, 2017	389,751	3	4,788	385,866	(906)
Balance at May. 05, 2017	390,140	3	4,788	385,349	0
Net income (loss)	(906)	0	0	0	(906)
Share-based compensation expense	526	0	0	526	0
Other	(9)	0	0	(9)	0
Balance at Jun. 30, 2017	$ 389,751	$ 3	$ 4,788	$ 385,866	$ (906)

Organization and Basis of Prese

Organization and Basis of Presentation	6 Months Ended
	Jun. 30, 2017
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization and Basis of Presentation	Note 1. Organization and Basis of Presentation General When referring to Amplify Energy Corp. (formerly known as Memorial Production Partners LP and also referred to as “Successor,” “Amplify Energy,” or the “Company”), the intent is to refer to Amplify Energy, a newly formed Delaware corporation, and its consolidated subsidiaries as a whole or on an individual basis, depending on the context in which the statements are made. Amplify Energy is the successor reporting company of Memorial Production Partners LP (“MEMP”) pursuant to Rule 15d-5 of the Securities Exchange Act of 1934, as amended. When referring to the “Predecessor” or the “Company” in reference to the period prior to the emergence from bankruptcy, the intent is to refer to MEMP, the predecessor that was dissolved following the effective date of the Plan (as defined below) and its consolidated subsidiaries as a whole or on an individual basis, depending on the context in which the statements are made. We operate in one reportable segment engaged in the acquisition, development, exploitation and production of oil and natural gas properties. Our management evaluates performance based on one reportable business segment as the economic environments are not different within the operation of our oil and natural gas properties. Our assets consist primarily of producing oil and natural gas properties and are located in Texas, Louisiana, Wyoming and offshore Southern California. Most of our oil and natural gas properties are located in large, mature oil and natural gas reservoirs. The Company’s properties consist primarily of operated and non-operated working interests in producing and undeveloped leasehold acreage and working interests in identified producing wells. Unless the context requires otherwise, references to: (i) our “Predecessor’s general partner” and “MEMP GP” refer to Memorial Production Partners GP LLC, our Predecessor’s general partner, which was dissolved following the effective date of the Plan; (ii) “Memorial Resource” refers collectively to Memorial Resource Development Corp., the former owner of our Predecessor’s general partner, and its subsidiaries; (iii) the “Funds” refers collectively to Natural Gas Partners VIII, L.P., Natural Gas Partners IX, L.P. and NGP IX Offshore Holdings, L.P., which collectively control MRD Holdco LLC; (iv) “OLLC” refers to Amplify Energy Operating LLC, formerly known as Memorial Production Operating LLC, our wholly owned subsidiary through which we operate our properties; (v) “Finance Corp.” refers to Memorial Production Finance Corporation, our Predecessor’s wholly owned subsidiary, whose activities were limited to co-issuing our debt securities and engaging in other activities incidental thereto and which was dissolved following the effective date of the Plan; and (vi) “NGP” refers to Natural Gas Partners. On April 27, 2016, we entered into an agreement pursuant to which the Predecessor agreed to acquire, among other things, all of the equity interests in our Predecessor’s general partner, MEMP GP, from Memorial Resource (the “MEMP GP Acquisition”) for cash consideration of approximately $0.8 million. MEMP GP held an approximate 0.1% general partner interest and 50% of the incentive distribution rights (“IDRs”) in us. In conjunction with the MEMP GP Acquisition, on April 27, 2016, we also entered into an agreement with an NGP affiliate pursuant to which we agreed to acquire the other 50% of the IDRs. The acquisition was accounted for as an equity transaction and no gain or loss was recognized as a result of the acquisition. In connection with the closing of the transactions on June 1, 2016, our Predecessor’s partnership agreement was amended and restated to, among other things, (i) convert the 0.1% general partner interest in the Predecessor held by MEMP GP into a non-economic general partner interest, (ii) cancel the IDRs and (iii) provide that the limited partners of the Predecessor will have the ability to elect the members of MEMP GP’s board of directors. In addition, we terminated the Predecessor’s Omnibus Agreement under which Memorial Resource provided management, administrative and operations personnel to us and our Predecessor’s general partner, and we entered into a transition services agreement with Memorial Resource to manage certain post-closing separation costs and activities. See Note 13 for additional information regarding the MEMP GP Acquisition and the transition services agreement. Basis of Presentation Our Unaudited Condensed Consolidated Financial Statements included herein have been prepared pursuant to the rules and guidelines of the Securities and Exchange Commission (the “SEC”). The results reported in these Unaudited Condensed Consolidated Financial Statements should not necessarily be taken as indicative of results that may be expected for the entire year. In our opinion, the accompanying Unaudited Condensed Consolidated Financial Statements include all adjustments of a normal recurring nature necessary for fair presentation. Although we believe the disclosures in these financial statements are adequate and make the information presented not misleading, certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the SEC. The inclusion of MEMP GP in our consolidated financial statements was effective June 1, 2016 due to the MEMP GP Acquisition. All material intercompany transactions and balances have been eliminated in preparation of our consolidated financial statements. Bankruptcy Accounting On January 16, 2017, MEMP and certain of its subsidiaries (collectively with MEMP, the “Debtors”) filed voluntary petitions (the cases commenced thereby, the “Chapter 11 proceedings”) under Chapter 11 of Title 11 of the United States Code (the “Bankruptcy Code” or “Chapter 11”) in the United States Bankruptcy Court for the Southern District of Texas, Houston Division (the “Bankruptcy Court”). The Debtors operated their business as “debtors-in-possession” under the Bankruptcy Code for the period from January 16, 2017 through May 4, 2017. The Unaudited Condensed Consolidated Financial Statements have been prepared as if the Company is a going concern and reflect the application of Accounting Standards Codification 852 “Reorganizations” (“ASC 852”). ASC 852 requires that the financial statements, for periods subsequent to the Chapter 11 filing, distinguish transactions and events that are directly associated with the reorganization from the ongoing operations of the business. Accordingly, certain expenses, gains and losses that were realized or incurred in the bankruptcy proceedings are recorded in “reorganization items, net” on the Company’s condensed statements of consolidated operations. Comparability of Financial Statements to Prior Periods As discussed in further detail in Note 3 below, we have adopted and applied the relevant guidance provided in GAAP with respect to the accounting and financial statement disclosures for entities that have emerged from bankruptcy proceedings (“Fresh Start Accounting”). Accordingly, our Unaudited Condensed Consolidated Financial Statements and Notes after May 4, 2017, are not comparable to the Unaudited Condensed Consolidated Financial Statements and Notes prior to that date. To facilitate our financial statement presentations, we refer to the reorganized company in these Unaudited Condensed Consolidated Financial Statements and Notes as the “Successor” for periods subsequent to May 4, 2017 and “Predecessor” for periods prior to May 5, 2017. Furthermore, our Unaudited Condensed Consolidated Financial Statements and Notes have been presented with a “black line” division to delineate the lack of comparability between the Predecessor and Successor. Use of Estimates The preparation of the accompanying Unaudited Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant estimates include, but are not limited to, oil and natural gas reserves; depreciation, depletion, and amortization of proved oil and natural gas properties; future cash flows from oil and natural gas properties; impairment of long-lived assets; fair value of derivatives; fair value of equity compensation; fair values of assets acquired and liabilities assumed in business combinations and asset retirement obligations.

Emergence from Voluntary Reorga

Emergence from Voluntary Reorganization under Chapter 11	6 Months Ended
	Jun. 30, 2017
Reorganizations [Abstract]
Emergence from Voluntary Reorganization under Chapter 11	Note 2. Emergence from Voluntary Reorganization under Chapter 11 On January 16, 2017 (the “Petition Date”), the Debtors filed voluntary petitions under the Bankruptcy Code in the Bankruptcy Court to pursue a Joint Chapter 11 Plan of Reorganization for the Debtors. The Debtors’ Chapter 11 proceedings were jointly administered under the caption In re Memorial Production Partners LP, et al. On April 14, 2017, the Bankruptcy Court entered an order (the “Confirmation Order”) approving the Second Amended Joint Plan of Reorganization of Memorial Production Partners LP and its affiliated Debtors, dated April 13, 2017 (as amended and supplemented, the “Plan”). On May 4, 2017 (the “Effective Date”), the Debtors satisfied the conditions to effectiveness of the Plan, the Plan became effective in accordance with its terms and the Company emerged from bankruptcy. Although the Company is no longer a debtor-in-possession, the Company was a debtor-in-possession through May 4, 2017. As such, certain aspects of the Chapter 11 proceedings and related matters are described below in order to provide context to the Company’s financial condition and results of operations for the period presented. Plan of Reorganization In accordance with the Plan, on the Effective Date: • The Successor issued (i) 25,000,000 new shares (the “New Common Shares”) of its common stock, par value $0.0001 per share (“common stock”); and (ii) warrants (the “Warrants”) to purchase up to 2,173,913 shares of the Company’s common stock exercisable for a five-year period commencing on the Effective Date entitling their holders upon exercise thereof, on a pro rata basis, to 8% of the total issued and outstanding common shares (including common shares as of the Effective Date issuable upon full exercise of the Warrants, but excluding any common shares issuable under the Management Incentive Plan (the “MIP”)), at a per share exercise price of $42.60. • The holders of claims under the Predecessor’s revolving credit facility received a full recovery, consisting of a cash pay down and their pro rata share of the $1 billion exit senior secured reserve-based revolving credit facility (the “Exit Credit Facility”), as further discussed in Note 9. • The 7.625% senior notes due May 2021 (“2021 Senior Notes”) and 6.875% senior notes due August 2022 (“2022 Senior Notes” and collectively, the “Notes”) were cancelled and the Predecessor’s liability thereunder discharged, and the holders of the Notes received (directly or indirectly) their pro rata share of New Common Shares representing, in the aggregate, 98% of the New Common Shares on the Effective Date (subject to dilution by the MIP and the common shares issuable upon exercise of the Warrants). Additionally, the holders of the Notes received their pro rata share of a $24.6 million cash distribution. • The Predecessor’s common units were cancelled, and each common unitholder received its pro rata share of: (i) 2% of the New Common Shares, (ii) the Warrants, and (iii) cash in an aggregate amount of approximately $1.3 million. • The holders of administrative expense claims, priority tax claims, other priority claims and general unsecured creditors of the Predecessor received in exchange for their claims payment in full in cash or otherwise had their rights unimpaired under Title 11 of the United States Code. • The Successor entered into a stockholders agreement (the “Stockholders Agreement”) with certain parties pursuant to which the Successor agreed to, at the direction of such stockholders, use commercially reasonable efforts to effect the sale of their common stock. • The Successor entered into a registration rights agreement (the “Registration Rights Agreement”) with certain parties pursuant to which the Successor agreed to, among other things, file a registration statement with the SEC within 90 days of the receipt of a request from the stockholders party thereto covering the offer and resale of the common stock held by such stockholders. • The Company’s MIP became effective, such that an aggregate of 2,322,404 shares of the Company’s common stock are available for grant pursuant to awards under the MIP. • The terms of the Predecessor’s general partner’s board of directors automatically expired on the Effective Date. The Successor formed a new seven-member board of directors consisting of the President and Chief Executive Officer, one director of the Predecessor, and five new members designated by certain parties to the plan support agreement.

Fresh Start Accounting

Fresh Start Accounting	6 Months Ended
	Jun. 30, 2017
Fresh Start Accounting [Abstract]
Fresh Start Accounting	Note 3. Fresh Start Accounting Upon emergence from the Chapter 11 proceedings on May 4, 2017, we adopted fresh start accounting as required by GAAP. We met the requirements of fresh start accounting, which include: (i) the holders of the Predecessor’s voting common units immediately prior to the Effective Date received less than 50% of the voting shares of the Company and (ii) the reorganization value of our assets immediately prior to the Effective Date was less than the post-petition liabilities and allowed claims. Reorganization Value The Successor’s enterprise value, as approved by the Bankruptcy Court, was estimated to be within a range of $700 million to $900 million, with a midpoint estimate of approximately $800 million. Enterprise value represents the estimated fair value of a company’s interest-bearing debt and its shareholders’ equity. Based on the estimates and assumptions utilized in our fresh start accounting process, we estimated the Successor’s enterprise value to be approximately $800 million before the consideration of cash and cash equivalents on hand at the Effective Date. Reorganization value represents the fair value of the Successor’s total assets prior to the consideration of liabilities and is intended to approximate the amount a willing buyer would pay for the assets immediately after a restructuring. The reorganization value, which was derived from the Successor’s enterprise value, was allocated to our individual assets based on their estimated fair values. The following table is a reconciliation of the enterprise value to the reorganization value of the Successor assets at the Effective Date (in thousands): Enterprise value $ 800,000 Plus: Cash and cash equivalents 20,140 Plus: Other working capital liabilities 63,817 Plus: Other long-term liabilities 97,470 Reorganization value of Successor assets $ 981,427 Our assets consist primarily of producing oil and natural gas properties. The fair values of proved and unproved oil and natural gas properties were estimated using valuation techniques consistent with the income approach, converting future cash flows to a single discounted amount. The factors to determine fair value include, but are not limited to, estimates of: (i) economic reserves; (ii) future operating and development costs; (iii) future commodity prices; and (iv) a market-based weighted average cost of capital. These inputs require significant judgments and estimates by the Company’s management at the time of the valuation and are the most sensitive and subject to change. The underlying commodity prices embedded in the Company’s estimated cash flows are the product of a process that begins with NYMEX forward curve pricing and is adjusted for estimated location and quality differentials, as well as other factors as necessary that the Company’s management believes will impact realizable prices. The fair value of support equipment and facilities were estimated using a cost approach, based on current replacement costs of the assets less depreciation based on the estimated economic useful lives of the assets and age of the assets. See below under the caption “Fresh Start Adjustments” for additional information regarding assumptions used in the valuation of the Company’s various other significant assets and liabilities. Condensed Consolidated Balance Sheet The adjustments included in the following condensed consolidated balance sheet reflect the effect of the transactions contemplated by the Plan (reflected in the column “Reorganization Adjustments”) as well as fair value and other required accounting adjustments resulting from the adoption of fresh start accounting (reflected in the column “Fresh Start Adjustments”). The explanatory notes provide additional information with regard to the adjustments recorded, the methods used to determine the fair values and significant assumptions. As of May 4, 2017 Reorganization Fresh Start Predecessor Adjustments (1) Adjustments Successor (In thousands) ASSETS Current assets: Cash and cash equivalents $ 83,050 $ (62,910 ) (2) $ — $ 20,140 Restricted cash — 7,411 (3) — 7,411 Accounts receivable 33,560 — — 33,560 Short-term derivative instruments 51,329 — — 51,329 Prepaid expenses and other current assets 10,229 675 (4) — 10,904 Total current assets 178,168 (54,824 ) — 123,344 Property and equipment, net 1,551,500 — (894,164 ) (11) 657,336 Long-term derivative instruments 33,800 — — 33,800 Restricted investments 156,443 — — 156,443 Other long-term assets 1,929 8,575 (5) — 10,504 Total assets $ 1,921,840 $ (46,249 ) $ (894,164 ) $ 981,427 LIABILITIES AND EQUITY Current liabilities: Accounts payable $ 1,501 $ 1,389 (6) $ — $ 2,890 Revenues payable 22,747 — — 22,747 Accrued liabilities 36,954 2,939 (7) (1,713 ) (12) 38,180 Current portion of long-term debt 454,799 (454,799 ) (8) — — Total current liabilities 516,001 (450,471 ) (1,713 ) 63,817 Liabilities subject to compromise 1,162,437 (1,162,437 ) (9) — — Long-term debt — 430,000 (8) — 430,000 Asset retirement obligations 158,114 — (62,928 ) (13) 95,186 Deferred tax liabilities 2,206 — — 2,206 Other long-term liabilities 2,481 — (2,403 ) (12) 78 Total liabilities 1,841,239 (1,182,908 ) (67,044 ) 591,287 Commitments and contingencies (see Note 14) Stockholders'/partners' equity: Predecessor common units 80,601 (80,601 ) (10) — — Successor warrants — 4,788 (10) — 4,788 Successor common stock — 3 (10) — 3 Successor additional paid-in capital — 1,212,469 (10) (827,120 ) (14) 385,349 Total stockholders'/ partners' equity 80,601 1,136,659 (827,120 ) 390,140 Total liabilities and equity $ 1,921,840 $ (46,249 ) $ (894,164 ) $ 981,427 Reorganization Adjustments (1) Reflects amounts recorded as of the Effective Date for the implementation of the Plan, including among other items, settlement of the Predecessor’s liabilities subject to compromise, cancellation of the Predecessor’s equity, issuance of the Successor New Common Shares and the Warrants, repayment of certain of Predecessor’s debt and settlement with holders of the Notes. (2) Reflects the changes in cash and cash equivalents, including the following (in thousands): Payment on the Predecessor's revolving credit facility $ (24,799 ) Payment to holders of the Notes (1) (16,446 ) Payment of fees related to Exit Credit Facility (8,575 ) Funding of the professional fees escrow account (7,411 ) Payment of professional fees (4,295 ) Other (1,384 ) Changes in cash and cash equivalents $ (62,910 ) (1) The total cash settlement to the holders of the Notes was approximately $24.6 million, of which $16.4 million was paid upon emergence and $8.2 million was paid post-emergence and is reflected in accrued liabilities in the above condensed consolidated balance sheet. (3) Reflects the transfer to restricted cash to fund the professional fees escrow account. (4) Reflects the pre-payment of certain professional fees. (5) Reflects the deferred financing costs related to the Exit Credit Facility. (6) Reflects the recognition of payables for general unsecured claims. (7) Net increase in accrued liabilities reflects the following (in thousands): Recognition of liability for settlement with holders of the Notes $ 8,193 Payment of professional fees (4,295 ) Recognition of contribution from management (1,500 ) Recognition of settlement with Predecessor common unitholders 1,250 Other (709 ) Net increase in accrued liabilities due to reorganization items $ 2,939 (8) Reflects a repayment of $24.8 million on the Predecessor’s revolving credit facility and the reclassification of $430.0 million in borrowings under the Exit Credit Facility to long-term debt. (9) Settlement of liabilities subject to compromise and the resulting net gain were determined as follows (in thousands): Accounts payable $ 1,389 Accrued interest payable 49,796 Debt 1,111,252 Total liabilities subject to compromise of Predecessor 1,162,437 Recognition of payables for general unsecured claims (1,389 ) Recognition of settlement with holders of the Notes (24,639 ) Issuance of common stock to holders of the Notes (377,645 ) Gain on settlement of liabilities subject to compromise $ 758,764 (10) Net increase in our stockholders’/partners’ equity reflects the following (in thousands): Issuance of common stock to holders of the Notes $ 377,645 Issuance of common stock to Predecessor common unitholders 7,707 Cancellation of the Predecessor's units issued and outstanding 80,601 Recognition on gain on settlement of liabilities subject to compromise 758,764 Recognition of issuance of common stock to Predecessor common unitholders (7,707 ) Recognition of issuance of warrants to Predecessor common unitholders (4,788 ) Recognition of contribution from management 1,500 Recognition of settlement with Predecessor common unitholders (1,250 ) Par value of common stock (3 ) Change in Successor additional paid-in capital 1,212,469 Issuance of warrants to Predecessor common unitholders 4,788 Par value of common stock 3 Predecessor units issued and outstanding (80,601 ) Net increase in capital accounts $ 1,136,659 Fresh Start Adjustments (11) Reflects a decrease of property and equipment, net based on the methodology discussed above and the elimination of accumulated depreciation, depletion and impairment. The fresh start adjustments to property and equipment, net are as follow: Predecessor Fresh Start Adjustments Successor (In thousands) Property and equipment at cost: Proved oil and natural gas properties $ 3,124,137 $ (2,615,076 ) $ 509,061 Support equipment and facilities 199,463 (101,883 ) 97,580 Unproved oil and natural gas properties — 44,688 44,688 Other 15,420 (9,413 ) 6,007 Property and equipment 3,339,020 (2,681,684 ) 657,336 Accumulated depreciation, depletion and impairment (1,787,520 ) 1,787,520 — Property and equipment, net $ 1,551,500 $ (894,164 ) $ 657,336 (12) Reflects the write-off of the deferred rent and loss on sublease liabilities. (13) Reflects a decrease of $62.9 million for asset retirement obligations. The fair value of asset retirement obligations were estimated using valuation techniques that convert future cash flows to a single discounted amount. Significant inputs to the valuation include estimates of: (i) plugging and abandonment costs per well based on existing regulatory requirements; (ii) remaining life per well; (iii) future inflation factors; and (iv) a credit-adjusted risk free rate. (14) Reflects the cumulative impact of our fresh start accounting adjustments discussed above. Reorganization Items, Net The Company has incurred significant costs associated with the reorganization. These costs, which are expensed as incurred, are expected to significantly affect the Company’s results of operations. Reorganization items, net represent costs and income directly associated with the Chapter 11 proceedings since the Petition Date. The following table summarizes the components of reorganization items, net included in the accompanying unaudited condensed statements of consolidated operations (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 January 1, through through 2017 through June 30, 2017 May 4, 2017 May 4, 2017 Gain on settlement of liabilities subject to compromise $ — $ 758,764 $ 758,764 Fresh start valuation adjustments — (827,120 ) (827,120 ) Professional fees (349 ) (12,239 ) (19,824 ) Other — (526 ) (594 ) Reorganization items, net $ (349 ) $ (81,121 ) $ (88,774 )

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Note 4. Summary of Significant Accounting Policies A discussion of our significant accounting policies and estimates is included in our 2016 Form 10-K. Accrued Liabilities Current accrued liabilities consisted of the following at the dates indicated (in thousands): Successor Predecessor June 30, December 31, 2017 2016 Accrued general and administrative expenses $ 12,533 $ 3,040 Accrued lease operating expense 8,568 10,411 Accrued capital expenditures 7,948 1,826 Accrued ad valorem tax 2,120 977 Accrued interest payable 1,612 46,417 Asset retirement obligation 941 789 Other 121 1,775 Accrued liabilities $ 33,843 $ 65,235 Supplemental Cash Flows Supplemental cash flows for the periods presented (in thousands): Successor Predecessor Period from Period from May 5, 2017 January 1, 2017 Six Months through through Ended June 30, 2017 May 4, 2017 June 30, 2016 Supplemental cash flows: Cash paid for interest, net of amounts capitalized $ 1,752 $ 6,598 $ 57,589 Cash paid for reorganization items, net 412 11,999 — Noncash investing and financing activities: Increase (decrease) in capital expenditures in payables and accrued liabilities 5,288 3,173 (1,759 ) (Increase) decrease in accounts receivable/payable related to divestitures — — (856 ) Asset retirement obligation removal related to divestitures — — 6,212 New Accounting Pronouncements Compensation —Stock Compensation. In May 2017, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update to clarify and reduce both (i) diversity in practice and (ii) cost and complexity when applying its guidance in the terms and conditions of a share-based payment award. The new guidance is effective for annual periods beginning after December 15, 2017, and interim periods within those annual periods. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Definition of a Business. In January 2017, the FASB issued an accounting standards update to clarify the definition of a business. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The amendments are intended to help companies and other organizations evaluate whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments provide a more robust framework to use in determining when a set of assets and activities is a business. The amendments are effective for annual periods beginning after December 15, 2017, including interim periods within those periods. Early adoption is permitted and the guidance is to be applied on a prospective basis to purchases or disposals of a business or an asset. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Statement of Cash Flows – Restricted Cash (a consensus of the FASB Emerging Issues Task Force). In November 2016, the FASB issued an accounting standards update to clarify the guidance on the classification and presentation of restricted cash in the statement of cash flows. The changes in restricted cash and restricted cash equivalents that result from the transfers between cash, cash equivalents, and restricted cash and restricted cash equivalents should not be presented as cash flow activities in the statement of cash flows. The new guidance is effective for reporting periods beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The new guidance requires transition under a retrospective approach for each period presented. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Statement of Cash Flows – Classification of Certain Cash Receipts and Cash Payments. In August 2016, the FASB issued an accounting standards update to address eight specific cash flow issues with the objective of reducing the current and potential future diversity in practice. The new guidance is effective for reporting periods beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The new guidance requires transition under a retrospective approach for each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Leases. In February 2016, the FASB issued a revision to lease accounting guidance. The FASB retained a dual model, requiring leases to be classified as either direct financing or operating leases. The classification will be based on criteria that are similar to the current lease accounting treatment. The revised guidance requires lessees to recognize a right-of-use asset and lease liability for all leasing transactions regardless of classification. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. The amendments are effective for financial statements issued for annual periods beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted for all entities as of the beginning of an interim or annual reporting period. The Company is the lessee under various agreements for office space, compressors, equipment, and surface rentals that are currently accounted for as operating leases. As a result, these new rules will increase reported assets and liabilities. The Company will not early adopt this standard. The Company will apply the revised lease rules for our interim and annual reporting periods starting January 1, 2019 using a modified retrospective approach, including several optional practical expedients related to leases commenced before the effective date. The Company is currently evaluating the impact of these rules on its financial statements and has started the assessment process by evaluating the population of leases under the revised definition. The quantitative impacts of the new standard are dependent on the leases in force at the time of adoption. As a result, the evaluation of the effect of the new standards will extend over future periods. Revenue from Contracts with Customers . In May 2014, the FASB issued guidance regarding the accounting for revenue from contracts with customers. This standard includes a five-step revenue recognition model to depict the transfer of goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Among other things, the standard also eliminates industry-specific revenue guidance and requires enhanced disclosures related to the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The guidance is effective for interim and annual reporting periods starting January 1, 2018, and early adoption is permitted. The Company will not early adopt the standard and plans to use a modified retrospective approach upon adoption with the cumulative effect of initial application recognized at the date of initial application subject to certain additional disclosures. The Company is currently evaluating its revenue streams and contracts under the revised standard to determine the impact it is expected to have on the consolidated financial statements and related disclosures. Other accounting standards that have been issued by the FASB or other standards-setting bodies are not expected to have a material impact on the Company’s financial position, results of operations and cash flows.

Acquisitions and Divestitures

Acquisitions and Divestitures	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Acquisitions and Divestitures	Note 5. Acquisitions and Divestitures Related Party Acquisitions See Note 13 for further information regarding related party acquisitions that have been accounted for as transactions between entities under common control that impact the basis of presentation for the periods presented. Acquisition and Divestiture Related Expenses Acquisition and divestiture related expenses for both related party and third party transactions are included in general and administrative expenses in the accompanying unaudited condensed statements of consolidated operations for the periods indicated below (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 $ — $ — $ 927 $ — $ 1,013 Acquisitions and Divestitures There were no material acquisitions or divestitures during the period from January 1, 2017 through May 4, 2017 or for the period from May 5, 2017 through June 30, 2017. On July 14, 2016, we closed a transaction to divest certain assets located in Colorado and Wyoming (the “Rockies Divestiture”) to a third party for total proceeds of approximately $16.4 million, including final post-closing adjustments. This disposition did not qualify as a discontinued operation. On June 14, 2016, we closed a transaction to divest certain assets located in the Permian Basin (the “Permian Divestiture”) to a third party for a total purchase price of approximately $36.7 million including estimated post-closing adjustments. This disposition did not qualify as a discontinued operation. The income (loss) before income taxes, including the associated (gain) loss on sale of properties, related to the Permian Divestiture and Rockies Divestiture, which is included in the accompanying unaudited condensed statements of consolidated operations of the Company, is as follows (in thousands): Predecessor Three Months Ended Six Months Ended June 30, 2016 June 30, 2016 Permian Divestiture $ 6,855 $ 4,832 Rockies Divestiture (5,860 ) (7,620 )

Fair Value Measurements of Fina

Fair Value Measurements of Financial Instruments	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements of Financial Instruments	Note 6. Fair Value Measurements of Financial Instruments Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at a specified measurement date. Fair value estimates are based on either (i) actual market data or (ii) assumptions that other market participants would use in pricing an asset or liability, including estimates of risk. A three-tier hierarchy has been established that classifies fair value amounts recognized or disclosed in the financial statements. The hierarchy considers fair value amounts based on observable inputs (Levels 1 and 2) to be more reliable and predictable than those based primarily on unobservable inputs (Level 3). All of the derivative instruments reflected on the accompanying unaudited condensed consolidated balance sheets were considered Level 2. The carrying values of accounts receivables, accounts payables (including accrued liabilities), restricted investments and amounts outstanding under long-term debt agreements with variable rates included in the accompanying unaudited condensed consolidated balance sheets approximated fair value at June 30, 2017 and December 31, 2016. The fair value estimates are based upon observable market data and are classified within Level 2 of the fair value hierarchy. These assets and liabilities are not presented in the following tables. See Note 9 for the estimated fair value of our outstanding debt. Assets and Liabilities Measured at Fair Value on a Recurring Basis The fair market values of the derivative financial instruments reflected on the accompanying unaudited condensed consolidated balance sheets as of June 30, 2017 and December 31, 2016 were based on estimated forward commodity prices. Financial assets and liabilities are classified based on the lowest level of input that is significant to the fair value measurement in its entirety. The significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The following table presents the gross derivative assets and liabilities that are measured at fair value on a recurring basis at June 30, 2017 and December 31, 2016 for each of the fair value hierarchy levels: Successor Fair Value Measurements at June 30, 2017 Using Quoted Prices in Significant Other Significant Active Market Observable Inputs Unobservable Inputs (Level 1) (Level 2) (Level 3) Fair Value (In thousands) Assets: Commodity derivatives $ — $ 88,797 $ — $ 88,797 Total assets $ — $ 88,797 $ — $ 88,797 Liabilities: Commodity derivatives $ — $ 10,037 $ — $ 10,037 Total liabilities $ — $ 10,037 $ — $ 10,037 Predecessor Fair Value Measurements at December 31, 2016 Using Quoted Prices in Significant Other Significant Active Market Observable Inputs Unobservable Inputs (Level 1) (Level 2) (Level 3) Fair Value (In thousands) Assets: Commodity derivatives $ — $ 189,851 $ — $ 189,851 Total assets $ — $ 189,851 $ — $ 189,851 Liabilities: Commodity derivatives $ — $ 17,757 $ — $ 17,757 Total liabilities $ — $ 17,757 $ — $ 17,757 See Note 7 for additional information regarding our derivative instruments. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Certain assets and liabilities are reported at fair value on a nonrecurring basis as reflected on the accompanying unaudited condensed consolidated balance sheets. The following methods and assumptions are used to estimate the fair values: • The fair value of asset retirement obligations (“AROs”) is based on discounted cash flow projections using numerous estimates, assumptions and judgments regarding factors such as the existence of a legal obligation for an ARO; amounts and timing of settlements; the credit-adjusted risk-free rate; and inflation rates. See Note 8 for a summary of changes in AROs. • If sufficient market data is not available, the determination of the fair values of proved and unproved properties acquired in transactions accounted for as business combinations are prepared by utilizing estimates of discounted cash flow projections. The factors to determine fair value include, but are not limited to, estimates of: (i) economic reserves; (ii) future operating and development costs; (iii) future commodity prices; and (iv) a market-based weighted average cost of capital. • Proved oil and natural gas properties are reviewed for impairment when events and circumstances indicate a possible decline in the recoverability of the carrying value of such properties. The factors used to determine fair value include, but are not limited to, estimates of proved reserves, estimates of probable reserves, future commodity prices, the timing of future production and capital expenditures and a discount rate commensurate with the risk reflective of the lives remaining for the respective oil and natural gas properties. • Unproved oil and natural gas properties are reviewed for impairment based on time or geologic factors. Information such as drilling results, reservoir performance, seismic interpretation or future plans to develop acreage is also considered. • No impairments were recognized during the period from January 1, 2017 through May 4, 2017 or for the period from May 5, 2017 through June 30, 2017. During the six months ended June 30, 2016, we recognized approximately $8.3 million of impairments related to certain properties located in East Texas. The estimated future cash flows expected from these properties were compared to their carrying values and determined to be unrecoverable primarily as a result of declining commodity prices. As a result of the impairments, the carrying value of these properties was reduced to approximately $11.0 million.

Risk Management and Derivative

Risk Management and Derivative Instruments	6 Months Ended
	Jun. 30, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Risk Management and Derivative Instruments	Note 7. Risk Management and Derivative Instruments Derivative instruments are utilized to manage exposure to commodity price and interest rate fluctuations and achieve a more predictable cash flow in connection with natural gas and oil sales from production and borrowing related activities. These instruments limit exposure to declines in prices or increases in interest rates, but also limit the benefits that would be realized if prices increase or interest rates decrease. Certain inherent business risks are associated with commodity and interest derivative contracts, including market risk and credit risk. Market risk is the risk that the price of natural gas or oil will change, either favorably or unfavorably, in response to changing market conditions. Credit risk is the risk of loss from nonperformance by the counterparty to a contract. It is our policy to enter into derivative contracts, including interest rate swaps, only with creditworthy counterparties, which generally are financial institutions, deemed by management as competent and competitive market makers. Some of the lenders, or certain of their affiliates, under our credit agreement are counterparties to our derivative contracts. While collateral is generally not required to be posted by counterparties, credit risk associated with derivative instruments is minimized by limiting exposure to any single counterparty and entering into derivative instruments only with creditworthy counterparties that are generally large financial institutions. Additionally, master netting agreements are used to mitigate risk of loss due to default with counterparties on derivative instruments. We have also entered into International Swaps and Derivatives Association Master Agreements (“ISDA Agreements”) with each of our counterparties. The terms of the ISDA Agreements provide us and each of our counterparties with rights of set-off upon the occurrence of defined acts of default by either us or our counterparty to a derivative, whereby the party not in default may set-off all liabilities owed to the defaulting party against all net derivative asset receivables from the defaulting party. At June 30, 2017, after taking into effect netting arrangements, we had no counterparty exposure related to our derivative instruments. As a result, had all counterparties failed completely to perform according to the terms of the existing contracts, we would have had the right to offset $78.8 million against amounts outstanding under our Exit Credit Facility at June 30, 2017. See Note 9 for additional information regarding our Exit Credit Facility. Commodity Derivatives We may use a combination of commodity derivatives (e.g., floating-for-fixed swaps, put options, and costless collars) to manage exposure to commodity price volatility. We recognize all derivative instruments at fair value. In January 2017, in connection with our restructuring efforts, we monetized $94.1 million in commodity hedges and used a portion of the proceeds to reduce the amounts outstanding under our Predecessor’s revolving credit facility and kept the remaining portion as cash on hand for general partnership purposes. During the three months ended June 30, 2016, we terminated certain “in-the-money” oil and NGL derivatives settling in 2016 and certain oil basis swaps settling in 2016 and 2017. We received cash settlements of approximately $39.3 million from the termination of these oil and NGL derivatives. We enter into natural gas derivative contracts that are indexed to NYMEX-Henry Hub. We also enter into oil derivative contracts indexed to either NYMEX-WTI, or ICE Brent. Our NGL derivative contracts are primarily indexed to OPIS Mont Belvieu. At June 30, 2017, we had the following open commodity positions: Remaining 2017 2018 Natural Gas Derivative Contracts: Fixed price swap contracts: Average monthly volume (MMBtu) 1,295,000 1,102,000 Weighted-average fixed price $ 3.96 $ 3.91 Crude Oil Derivative Contracts: Fixed price swap contracts: Average monthly volume (Bbls) 129,000 122,000 Weighted-average fixed price $ 71.44 $ 75.69 Collar contracts: Average monthly volume (Bbls) 10,000 — Weighted-average floor price $ 45.00 $ — Weighted-average ceiling price $ 54.50 $ — NGL Derivative Contracts: Fixed price swap contracts: Average monthly volume (Bbls) 78,400 65,700 Weighted-average fixed price $ 30.29 $ 24.13 Interest Rate Swaps Periodically, we enter into interest rate swaps to mitigate exposure to market rate fluctuations by converting variable interest rates, such as those in our credit agreement, to fixed interest rates. The Company did not have any interest rate swaps at June 30, 2017. Balance Sheet Presentation The following table summarizes both: (i) the gross fair value of derivative instruments by the appropriate balance sheet classification even when the derivative instruments are subject to netting arrangements and qualify for net presentation in the balance sheet and (ii) the net recorded fair value as reflected on the balance sheet at June 30, 2017 and December 31, 2016. There was no cash collateral received or pledged associated with our derivative instruments since most of the counterparties, or certain of their affiliates, to our derivative contracts are lenders under our credit agreement. Successor Predecessor Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives June 30, June 30, December 31, December 31, Type Balance Sheet Location 2017 2017 2016 2016 (In thousands) Commodity contracts $ 63,214 $ 9,916 $ 86,335 $ 16,871 Gross fair value 63,214 9,916 86,335 16,871 Netting arrangements (9,916 ) (9,916 ) (16,871 ) (16,871 ) Net recorded fair value Short-term derivative instruments $ 53,298 $ — $ 69,464 $ — Commodity contracts $ 25,583 $ 121 $ 103,515 $ 885 Gross fair value 25,583 121 103,515 885 Netting arrangements (121 ) (121 ) (885 ) (885 ) Net recorded fair value Long-term derivative instruments $ 25,462 $ — $ 102,630 $ — (Gains) Losses on Derivatives We do not designate derivative instruments as hedging instruments for accounting and financial reporting purposes. Accordingly, all gains and losses, including changes in the derivative instruments’ fair values, have been recorded in the accompanying condensed statements of consolidated operations. The following table details the gains and losses related to derivative instruments for the periods indicated (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 (Gain) loss on commodity derivatives $ (1,915 ) $ (12,835 ) $ 124,580 $ (23,076 ) $ 72,835 Interest expense, net — — 1,844 — 5,526

Asset Retirement Obligations

Asset Retirement Obligations	6 Months Ended
	Jun. 30, 2017
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	Note 8. Asset Retirement Obligations The Company’s asset retirement obligations primarily relate to the Company’s portion of future plugging and abandonment costs for wells and related facilities. The following table presents the changes in the asset retirement obligations for the period from January 1, 2017 through May 4, 2017 and for the period from May 5, 2017 through June 30, 2017 (in thousands): Asset retirement obligations at beginning of period (Predecessor) $ 155,702 Liabilities added from acquisitions or drilling 6 Liabilities settled (164 ) Accretion expense 3,407 Revision of estimates 104 Asset retirement obligations at May 4, 2017 (Predecessor) $ 159,055 Fresh start adjustments (1) (62,928 ) Asset retirement obligations at May 5, 2017 (Successor) $ 96,127 Liabilities added from acquisition or drilling 8 Liabilities settled — Accretion expense 1,027 Revision of estimates 69 Asset retirement obligation at end of period (Successor) 97,231 Less: Current Portion (941 ) Asset retirement obligations - long-term portion (Successor) $ 96,290 (1) As a result of the application of fresh start accounting, the Successor recorded its asset retirement obligations at fair value as of the Effective Date.

Debt

Debt	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Debt	Note 9. Debt The following table presents our consolidated debt obligations at the dates indicated: Successor Predecessor June 30, December 31, 2017 2016 (In thousands) Successor $1.0 billion Exit Credit Facility, variable-rate, due March 2021 (1) $ 418,000 $ — Predecessor $2.0 billion revolving credit facility, variable-rate, due March 2018 (1) — 511,652 2021 Senior Notes, fixed-rate, due May 2021 (2) (4) — 646,287 2022 Senior Notes, fixed-rate, due August 2022 (3) (4) — 464,965 Total debt 418,000 1,622,904 Less: current portion of long-term debt (5) — (1,622,904 ) Long-term debt $ 418,000 $ — (1) The carrying amount of our Predecessor’s revolving credit facility and Successor Exit Credit Facility approximates fair value because the interest rates are variable and reflective of market rates. (2) The estimated fair value of our 2021 Senior Notes was $314.3 million at December 31, 2016. (3) The estimated fair value of our 2022 Senior Notes was $223.2 million at December 31, 2016. (4) The estimated fair value is based on quoted market prices and is classified as Level 2 within the fair value hierarchy. (5) Due to the existing and anticipated financial covenant violations as of December 31, 2016, the borrowings under the Predecessor’s revolving credit facility and the Notes were classified as current at December 31, 2016. There were no existing or anticipated financial covenant violations as of June 30, 2017. Exit Credit Facility On May 4, 2017, OLLC, as borrower, entered into the Amended and Restated Credit Agreement (the “Credit Agreement”) among Amplify Acquisitionco Inc., a Delaware corporation (“Acquisitionco”), as parent guarantor, the lenders from time to time party thereto and Wells Fargo Bank, National Association, as Administrative Agent. Pursuant to the Credit Agreement the lenders party thereto agreed to provide OLLC with the Exit Credit Facility (the loans thereunder, the “Loans”). The aggregate principal amount of Loans outstanding under the Exit Credit Facility as of the Effective Date was $430.0 million. The terms and conditions under the Credit Agreement include (but are not limited to) the following: • a borrowing base of approximately $490.0 million (which borrowing base amount will be reduced by • a maturity date of March 19, 2021 for the Exit Credit Facility; • the Loans shall bear interest at a rate per annum equal to (i) the alternative base rate plus an applicable margin of 2.00% to 3.00% or (ii) adjusted LIBOR plus an applicable margin of 3.00% to 4.00%, in each case based on the borrowing base utilization percentage under the Exit Credit Facility; • the unused commitments under the Exit Credit Facility will accrue a commitment fee of 0.50%, payable quarterly in arrears; • the obligations under the Credit Agreement are guaranteed by Acquisitionco and substantially all of OLLC’s subsidiaries (the “Guarantors”), subject to limited exceptions, and secured on a first-priority basis by substantially all of OLLC’s and the Guarantors’ assets, including, without limitation, liens on at least 95% of the total value of OLLC’s and the Guarantors’ oil and gas properties, a non-recourse pledge by the Company of the capital stock of Acquisitionco, a pledge by Acquisitionco of the membership interests of OLLC and pledges of stock of all other direct and indirect subsidiaries of OLLC, subject to certain limited exceptions; • certain financial covenants, including the maintenance of (i) an interest coverage ratio not to exceed 2.50 to 1.00, determined as of the last day of each fiscal quarter for the four fiscal-quarter period then ending, commencing with the fiscal quarter ending September 30, 2017, (ii) a current ratio, determined as of the last day of each fiscal quarter, commencing with the fiscal quarter ending September 30, 2017, of not less than 1.00 to 1.00 and (iii) a total leverage ratio, determined as of the last day of each fiscal quarter, commencing with the fiscal quarter ending September 30, 2017, of less than or equal to 4.00 to 1.00; and • certain events of default, including, without limitation: non-payment; breaches of representations and warranties; non-compliance with covenants or other agreements; cross-default to material indebtedness; judgments; change of control; and voluntary and involuntary bankruptcy. The borrowing base as of June 30, 2017 was approximately $487.5 million. Unamortized deferred financing costs associated with our Exit Credit Facility was $8.4 million at June 30, 2017. The unamortized deferred financing costs are amortized over the remaining life of our Exit Credit Facility. Letters of Credit At June 30, 2017, we had $2.5 million of letters of credit outstanding, primarily related to operations at our Wyoming properties. Predecessor’s Revolving Credit Facility Our Predecessor was a party to a $2.0 billion revolving credit facility, which was guaranteed by us and all of our current and future subsidiaries (other than certain immaterial subsidiaries). On the Effective Date of the Plan, the holders of claims under the Predecessor’s revolving credit facility received a full recovery, which included a $24.8 million pay down and their pro rata share of the Exit Credit Facility. See Note 2 for additional information. Senior Notes On the Effective Date, the Notes were cancelled and the Predecessor’s liability thereunder discharged, and the holders of the Notes received their pro rata share of the New Common Shares. Additionally, the holders of the Notes received their pro rata share of a $24.6 million cash distribution. The Company’s voluntary petitions as described in Note 2 constituted an event of default that accelerated the obligations under the Notes. For the period from April 1, 2017 through May 4, 2017 and for the period from January 17, 2017 through May 4, 2017 our contractual interest that was not recorded on the Notes was approximately $7.5 million and $24.2 million, respectively. During the three and six months ended June 30, 2016, our Predecessor repurchased on the open market approximately $52.2 million of its 2021 Senior Notes and approximately $32.0 million of its 2022 Senior Notes. In connection with the repurchases, our Predecessor paid approximately $40.5 million and recorded a gain on extinguishment of debt of approximately $41.7 million for the three and six months ended June 30, 2016. Weighted-Average Interest Rates The following table presents the weighted-average interest rates paid, excluding commitment fees, on our consolidated variable-rate debt obligations for the periods presented: Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 Successor Exit Credit Facility 4.91% n/a n/a n/a n/a Predecessor's revolving credit facility n/a 3.80% 3.30% 4.04% 2.85%

Equity and Distributions

Equity and Distributions	6 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Equity and Distributions	Note 10. Equity and Distributions Issuance of Common Stock and Cancellation of Units In accordance with the Plan, on the Effective Date: • the Company issued 25,000,000 New Common Shares and Warrants to purchase up to 2,173,913 shares of its common stock; • the Predecessor common units were cancelled; and • each Predecessor common unitholder received its pro rata share of: (i) 2% of the New Common Shares, (ii) the Warrants, and (iii) cash in an aggregate amount of approximately $1.3 million. On the Effective Date, there were 25,000,000 New Common Shares issued and outstanding. The following table summarizes the changes in the number of outstanding common units and shares of common stock: Common Units/Shares Balance, December 31, 2016 (Predecessor) 83,827,920 Restricted common units issued — Restricted common units forfeited (12,952 ) Restricted common units repurchased (1) (14,681 ) Balance, May 4, 2017 (Predecessor) 83,800,287 Cancellation of Predecessor common units (83,800,287 ) Balance, May 4, 2017 (Predecessor) — Issuance of Successor common stock 25,000,000 Balance, May 5, 2017 (Successor) 25,000,000 Issuance of Successor common stock — Balance, June 30, 2017 (Successor) 25,000,000 (1) Restricted common units are generally net-settled by unitholders to cover the required withholding tax upon vesting. Unitholders surrendered units with value equivalent to the employees’ minimum statutory obligation for the applicable income and other employment taxes. Total payments remitted for the employees’ tax obligations to the appropriate taxing authorities were less than approximately $0.1 million for the period from January 1, 2017 through May 4, 2017. The net-settlement had the effect of unit repurchase by the Company as they reduced the number of units that would have otherwise been outstanding as a result of the vesting and did not represent an expense to the Company. Warrants On the Effective Date, the Company entered into a warrant agreement with American Stock Transfer & Trust Company, LLC, as warrant agent, pursuant to which the Company issued Warrants to purchase up to 2,173,913 shares of the Company’s common stock (representing 8% of the Company’s outstanding common stock as of the Effective Date including shares of the Company’s common stock issuable upon full exercise of the Warrants, but excluding any common stock issuable under the MIP), exercisable for a five year period commencing on the Effective Date at an exercise price of $42.60 per share. The fair values for the warrants upon issuance have been estimated using the Black-Scholes option pricing model using the following assumptions: Warrants Issued in Successor Period Risk-free interest rate 2.06 % Dividend yield — Expected life (in years) 5.0 Expected volatility 50.0 % Strike Price $ 42.60 Calculated fair value $ 2.20 Predecessor “At-the-Market” Equity Program On May 25, 2016, our Predecessor entered into an equity distribution agreement for the sale of up to $60 million of common units under an at-the-market offering program (the “ATM Program”). Sales of common units, were made under the ATM Program by means of ordinary brokers’ transactions, through the facilities of the NASDAQ Global Market at market prices, or as otherwise agreed to between the Predecessor and a sales agent. During the three and six months ended June 30, 2016, our Predecessor sold 822,313 common units under the ATM program, generating net proceeds of approximately $1.6 million (net of approximately $0.1 million in commissions). Our Predecessor used the net proceeds from the sale of common units to repurchase senior notes. Predecessor Prior to the MEMP GP Acquisition, net income (loss) attributable to the Predecessor was allocated between our Predecessor’s general partner and the common unitholders in proportion to their pro rata ownership after giving effect to priority earnings allocations in an amount equal to incentive cash distributions allocated to our Predecessor’s general partner and the Funds. Subsequent to the MEMP GP Acquisition, net income (loss) attributable to the Predecessor was allocated entirely to the common unitholders. Cash Distributions to Unitholders The following table summarizes our Predecessor’s declared quarterly cash distribution rates and amounts with respect to the quarter indicated (dollars in millions, except per unit amounts): Distribution Amount Aggregate Received by Quarter Declaration Date Record Date Payment Date Per Unit Distribution Affiliates 2 nd July 26, 2016 August 5, 2016 August 12, 2016 $ 0.0300 $ 2.5 $ < 0.1 1 st April 26, 2016 May 6, 2016 May 13, 2016 $ 0.0300 $ 2.5 $ < 0.1 4 th January 26, 2016 February 5, 2016 February 12, 2016 $ 0.1000 $ 8.3 $ < 0.1 In October 2016, the board of directors of our Predecessor’s general partner suspended distributions on common units, primarily due to the current and expected commodity price environment and market conditions and their impact on our future business, as well as restrictions imposed by our Predecessor’s debt instruments, including our Predecessor’s revolving credit facility.

Earnings per Share_Unit

Earnings per Share/Unit	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Earnings per Share/Unit	Note 11. Earnings per Share/Unit The following sets forth the calculation of earnings (loss) per share/unit, or EPS/EPU, for the periods indicated (in thousands, except per share/unit amounts): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, Six Months through through Ended 2017 through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 Net income (loss) attributable to Successor/Predecessor $ (906 ) $ (74,578 ) $ (147,550 ) $ (90,955 ) $ (185,647 ) Less: predecessor's general partner's 0.1% interest in net income (loss) (1) — — (128 ) — (168 ) Net (income) allocated to participating restricted stockholders — — — — — Net income (loss) available to common stockholders/limited partners $ (906 ) $ (74,578 ) $ (147,422 ) $ (90,955 ) $ (185,479 ) Common shares/units: Common shares/units outstanding — basic 25,000 83,800 83,007 83,807 82,971 Dilutive effect of potential common shares/units — — — — — Common shares/units outstanding — diluted 25,000 83,800 83,007 83,807 82,971 Net earnings per share/unit: Basic $ (0.04 ) $ (0.89 ) $ (1.78 ) $ (1.09 ) $ (2.24 ) Diluted $ (0.04 ) $ (0.89 ) $ (1.78 ) $ (1.09 ) $ (2.24 ) Antidilutive stock options (2) 516 — — — — Antidilutive warrants (3) 2,174 — — — — (1) As a result of repurchases under the December 2014 repurchase program, our Predecessor’s general partner had an approximate average 0.105% interest in us prior to the MEMP GP Acquisition for the three and six months ended June 30, 2016. (2) Amount represents options to purchase common stock that are excluded from the diluted net earnings per share calculations because of their antidilutive effect. (3) Amount represents warrants to purchase common stock that are excluded from the diluted net earnings per share calculations because of their antidilutive effect.

Long-Term Incentive Plans

Long-Term Incentive Plans	6 Months Ended
	Jun. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Long-Term Incentive Plans	Note 12. Long-Term Incentive Plans On the Effective Date in connection with the Plan, the Company implemented the MIP for selected employees of the Company or its subsidiaries. An aggregate of 2,322,404 shares of the Company’s common stock are reserved for issuance under the MIP. MIP awards are granted in the form of nonqualified stock options, incentive stock options, restricted stock awards, restricted stock units, stock appreciation rights, performance awards, stock awards and other incentive awards. To the extent that an award under the MIP is expired, forfeited or cancelled for any reason without having been exercised in full, the unexercised award would then be available again for grant under the MIP. The MIP is administered by the board of directors of the Company. On May 4, 2017, the board of directors approved grants of restricted stock unit awards and stock options (collectively, the “Emergence Awards”) to certain of the Company’s employees, including the Company’s executive officers. The board granted 614,754 restricted stock units and 614,754 stock options under the MIP on the Effective Date. The Emergence Awards will generally vest annually in three equal installments on each of the first three anniversaries of the Effective Date, subject to the grantee’s continued employment through each such vesting date. However, upon the grantee’s (i) termination of employment without “cause,” or due to death or “disability,” or (ii) resignation for “good reason,” in each case, (A) any unvested restricted stock unit award at such time shall fully vest and (B) the portion of the then unvested stock options that would have vested had the grantee remained employed with the Company or its subsidiaries during the 12 months following such termination or resignation date shall vest. In addition, if the grantee is terminated by the Company without cause or the grantee resigns for good reason, in each case, following a “change of control,” all unvested stock options at such time shall fully vest. Subject to the foregoing, any unvested Emergence Awards will be forfeited upon the grantee’s termination of employment. Restricted Stock Units The restricted stock units granted are accounted for as equity-classified awards. The grant-date fair value net of estimated forfeitures is recognized as compensation cost on a straight-line basis over the requisite service period. Compensation costs are recorded as general and administrative expenses. The unrecognized cost associated with restricted stock unit awards was $8.6 million at June 30, 2017. We expect to recognize the unrecognized compensation cost for these awards over a weighted-average period of 2.9 years. The following table summarizes information regarding the restricted stock unit awards granted under the MIP for the period presented: Weighted- Average Grant Number of Date Fair Value Units per Unit (1) Restricted stock units outstanding at May 5, 2017 (Successor) 614,754 $ 13.77 Granted 143,341 $ 13.77 Forfeited (99,232 ) $ 13.77 Vested — $ — Restricted stock units outstanding at June 30, 2017 (Successor) 658,863 $ 13.77 (1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued. Stock Options The fair value for stock options granted during the period have been estimated using the Black-Scholes option pricing model using the following assumptions: Awards Issued in Successor Period Risk-free interest rate 2.06 % Dividend yield — Expected life (in years) 6.0 Expected volatility 50.0 % Strike Price $ 21.58 Calculated fair value per stock option $ 5.01 The stock options granted are accounted for as equity-classified awards. The grant-date fair value net of estimated forfeitures is recognized as compensation cost on a straight-line basis over the requisite service period. Compensation costs are recorded as general and administrative expenses. The unrecognized cost associated with stock option awards was $2.4 million at June 30, 2017. We expect to recognize the unrecognized compensation cost for these awards over a weighted-average period of 2.9 years. The following table summarizes information regarding the stock option awards granted under the MIP for the period presented: Weighted- Average Grant Number of Date Fair Value Units per Unit (1) Stock options outstanding at May 4, 2017 (Successor) 614,754 $ 5.01 Granted — $ — Forfeited (99,232 ) $ 5.01 Vested — $ — Stock Options outstanding at June 30, 2017 (Successor) 515,522 $ 5.01 (1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued. Predecessor Restricted Common Units On May 1, 2017, the Company effectively cancelled the unvested restricted common unit awards under the Memorial Production Partners GP LLC Long-Term Incentive Plan (“LTIP”) and recorded $2.3 million in compensation expense with the cancellation of the LTIP. On June 1, 2016, in connection with the MEMP GP Acquisition, the board of directors of our Predecessor’s general partner approved the acceleration of the vesting schedule of unvested awards under the LTIP for the employees that remained with Memorial Resource. The grant-date fair value compensation cost of approximately $0.1 million was reversed and the modified-date grant fair value compensation cost of $0.5 million was recognized. On March 9, 2016, certain employees were impacted by an involuntary termination which, upon the approval of the board of directors of our Predecessor’s general partner, accelerated the vesting schedule of unvested awards under the LTIP that otherwise would have been forfeited upon an involuntary termination. The acceleration of the LTIP vesting schedule represents an improbable-to-probable modification. The grant-date fair value compensation cost of approximately $0.5 million was reversed and the modified-date grant fair value compensation cost of approximately $0.3 million was recognized. The following table summarizes information regarding the restricted common unit awards granted under the LTIP for the periods presented: Weighted- Average Grant Number of Date Fair Value Units per Unit (1) Restricted common units outstanding at December 31, 2016 (Predecessor) 432,160 $ 15.00 Granted — $ — Forfeited (12,952 ) $ 9.51 Vested (43,045 ) $ 10.40 Cancelled (376,163 ) $ 15.72 Restricted common units outstanding at May 4, 2017 (Predecessor) — $ — (1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued. Predecessor Phantom Units The following table summarizes information regarding the Predecessor’s phantom unit awards granted under the LTIP: Number of Units Phantom units outstanding at December 31, 2016 (Predecessor) 5,980,693 Granted — Forfeited (132,347 ) Vested (155,601 ) Phantom units outstanding at May 4, 2017 (Predecessor) 5,692,745 Cancelled (5,692,745 ) Phantom units outstanding at June 30, 2017 (Successor) — Phantom units issued to non-employee directors of our Predecessor in January 2016 vested on the first anniversary of the date of grant and were settled in cash for less than $0.1 million. Phantom units issued to certain employees in June 2016 were scheduled to vest in substantially equal one-third increments on the first, second, and third anniversaries of the date of grant. The awards included distribution equivalent rights (“DERs”) pursuant to which the recipient would, upon vesting, receive a cash payment with respect to each phantom unit equal to any cash distributions that we paid to a holder of a common unit. DERs were treated as additional compensation expense. Upon vesting, the phantom units were scheduled to be settled through an amount of cash in a single lump sum payment equal to the product of (y) the closing price of our common units on the vesting date and (z) the number of such vested phantom units. In lieu of a cash payment, the board of directors of our Predecessor’s general partner, in its discretion, was permitted to elect for the recipient to receive either a number of common units equal to the number of such vested phantom units or a combination of cash and common units. Upon emergence from bankruptcy, the remaining awards were settled in cash for less than $0.1 million. Compensation Expense The following table summarizes the amount of recognized compensation expense associated with the MIP and LTIP awards that are reflected in the accompanying unaudited condensed statements of consolidated operations for the periods presented (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 Equity classified awards Restricted stock units (Successor) $ 426 $ — $ — $ — $ — Restricted stock options (Successor) 101 — — — — Restricted common units (Predecessor) — 2,644 2,507 3,713 4,999 Liability classified awards Phantom units (Predecessor) — (102 ) 224 (46 ) 300 $ 527 $ 2,542 $ 2,731 $ 3,667 $ 5,299

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jun. 30, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Note 13. Related Party Transactions On June 1, 2016, Memorial Resource and certain affiliates of NGP became unaffiliated entities after we closed the MEMP GP Acquisition, as discussed in Note 1. NGP Affiliated Companies During the six months ended June 30, 2016, our Predecessor paid less than $0.1 million to Multi-Shot, LLC, an NGP affiliate company, for services related to our drilling and completion activities. Common Control Acquisitions MEMP GP Acquisition. On June 1, 2016, as discussed in Note 1, our Predecessor acquired all of the equity interests in our Predecessor’s general partner, MEMP GP, from Memorial Resource for cash consideration of approximately $0.8 million. The acquisition was accounted for as an equity transaction and no gain or loss was recognized as a result of the acquisition. In connection with the closing of the transaction, our Predecessor’s partnership agreement was amended and restated to, among other things, (i) convert MEMP GP’s 0.1% general partnership interest into a non-economic general partner interest, (ii) cancel the IDRs, and (iii) provide that the limited partners of our Predecessor had the ability to elect the members of MEMP GP’s board of directors. On June 1, 2016, our Predecessor also acquired the remaining 50% of the IDRs of MEMP owned by an NGP affiliate. On June 1, 2016, Memorial Resource assigned and transferred Beta Operating Company, LLC to our Predecessor in connection with the MEMP GP Acquisition. Related Party Agreements We and certain of our former affiliates entered into various documents and agreements during the Predecessor’s existence, including the Predecessor’s Omnibus Agreement described below. These agreements were negotiated among affiliated parties and, consequently, were not the result of arm’s-length negotiations. Omnibus Agreement Memorial Resource provided management, administrative and operating services to the Predecessor and our Predecessor’s general partner pursuant to our Predecessor’s Omnibus Agreement. Upon completion of the MEMP GP Acquisition, the Predecessor’s Omnibus Agreement was terminated and the Company entered into a transition services agreement with Memorial Resource. The following table summarizes the amount of general and administrative expenses recognized under the Predecessor’s Omnibus Agreement that are reflected in the accompanying unaudited condensed statements of consolidated operations for the periods presented (in thousands): Predecessor Three Months Ended For the Six Months Ended June 30, June 30, 2016 2016 $ 4,418 $ 11,867 Transition Services Agreement On June 1, 2016, we closed the MEMP GP Acquisition. Upon closing of the MEMP GP Acquisition, we and Memorial Resource became unaffiliated entities. We terminated our Predecessor’s Omnibus Agreement as noted above and entered into a transition services agreement with Memorial Resource to manage post-closing separation costs and activities. The Company did not incur any costs under the transition services agreement for the period from May 5, 2017 through June 30, 2017 or for the period from January 1, 2017 through May 4, 2017. We recorded $0.5 million of general and administrative expenses related to the transition services agreement with Memorial Resource for the three months ended June 30, 2016.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 14. Commitments and Contingencies Litigation and Environmental As part of our normal business activities, we may be named as defendants in litigation and legal proceedings, including those arising from regulatory and environmental matters. On January 13, 2017, the Company received a letter from the Environmental Protection Agency (“EPA”) concerning potential violations of the Clean Air Act (“CAA”) section 112(r) associated with our Bairoil complex in Wyoming. The Company met with the EPA on February 16, 2017 to present relevant information related to the allegations. We currently cannot estimate the potential penalties, fines or other expenditures, if any, that may result from any EPA actions relating to the alleged violations and, therefore, we cannot determine if the ultimate outcome of this matter will have a material impact on the Company’s financial position, results of operations or cash flows. Other than the Chapter 11 proceedings and the alleged CAA violations discussed herein, based on facts currently available, we are not aware of any litigation, pending or threatened, that we believe will have a material adverse effect on our financial position, results of operations or cash flows; however, cash flow could be significantly impacted in the reporting periods in which such matters are resolved. Although we are insured against various risks to the extent we believe it is prudent, there is no assurance that the nature and amount of such insurance will be adequate, in every case, to indemnify us against liabilities arising from future legal proceedings. At June 30, 2017 and December 31, 2016, we had no environmental reserves recorded on our unaudited condensed consolidated balance sheet. Supplemental Bond for Decommissioning Liabilities Trust Agreement Rise Energy Operating, LLC, a wholly owned subsidiary, $152.0 million as of June 30, 2017 and December 31, 2016. The held-to-maturity investments held in the trust account at June 30, 2017 for the U.S. Bank money market cash equivalent was $152.1 million. In 2015, the Bureau of Safety and Environmental Enforcement issued a preliminary report that indicated the estimated costs of decommissioning may further increase, and we expect the amount to be finalized during 2017 after negotiations are completed.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Note 15. Income Taxes Effective May 5, 2017, pursuant to the Plan, the Successor became a corporation subject to federal and state income taxes. Prior to the Plan being effective, the Predecessor was a limited partnership and organized as a pass-through entity for federal and most state income tax purposes. As a result, our Predecessor limited partners were responsible for federal and state income taxes on their share of our taxable income. Certain of our consolidated subsidiaries were taxed as corporations for federal and state income tax purposes, which resulted in deferred taxes. We were also subject to the Texas margin tax for partnership activity in the state of Texas. The Company’s income tax expense/(benefit) for the period from May 5, 2017 through June 30, 2017 was ($0.6) million, for the period from January 1, 2017 through May 4, 2017 was ($0.1) million and for the six months ended June 30, 2016 was $0.2 million. The Company’s effective tax rate for the period from May 5, 2017 through June 30, 2017 was 39.5%, for the period from January 1, 2017 through May 4, 2017 was 0.1% and for the six months ended June 30, 2016 was (0.1%). The effective tax rate for the period from May 5, 2017 through June 30, 2017 is different from the statutory U.S. federal income tax rate due to the impact of state taxes, disallowed expenses, and changes in the rate applied to historic deferred balances. The effective tax rate for the six months ended June 30, 2016 is different from the statutory U.S. federal income tax rate primarily due to the Predecessor not being subject to U.S. federal income tax. Deferred tax benefit of $0.2 million was recorded in income tax benefit for the Company’s change from a limited partnership to a corporation for the period from May 5, 2017 through June 30, 2017.

Organization and Basis of Pre22

Organization and Basis of Presentation (Policies)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
General	General When referring to Amplify Energy Corp. (formerly known as Memorial Production Partners LP and also referred to as “Successor,” “Amplify Energy,” or the “Company”), the intent is to refer to Amplify Energy, a newly formed Delaware corporation, and its consolidated subsidiaries as a whole or on an individual basis, depending on the context in which the statements are made. Amplify Energy is the successor reporting company of Memorial Production Partners LP (“MEMP”) pursuant to Rule 15d-5 of the Securities Exchange Act of 1934, as amended. When referring to the “Predecessor” or the “Company” in reference to the period prior to the emergence from bankruptcy, the intent is to refer to MEMP, the predecessor that was dissolved following the effective date of the Plan (as defined below) and its consolidated subsidiaries as a whole or on an individual basis, depending on the context in which the statements are made. We operate in one reportable segment engaged in the acquisition, development, exploitation and production of oil and natural gas properties. Our management evaluates performance based on one reportable business segment as the economic environments are not different within the operation of our oil and natural gas properties. Our assets consist primarily of producing oil and natural gas properties and are located in Texas, Louisiana, Wyoming and offshore Southern California. Most of our oil and natural gas properties are located in large, mature oil and natural gas reservoirs. The Company’s properties consist primarily of operated and non-operated working interests in producing and undeveloped leasehold acreage and working interests in identified producing wells. Unless the context requires otherwise, references to: (i) our “Predecessor’s general partner” and “MEMP GP” refer to Memorial Production Partners GP LLC, our Predecessor’s general partner, which was dissolved following the effective date of the Plan; (ii) “Memorial Resource” refers collectively to Memorial Resource Development Corp., the former owner of our Predecessor’s general partner, and its subsidiaries; (iii) the “Funds” refers collectively to Natural Gas Partners VIII, L.P., Natural Gas Partners IX, L.P. and NGP IX Offshore Holdings, L.P., which collectively control MRD Holdco LLC; (iv) “OLLC” refers to Amplify Energy Operating LLC, formerly known as Memorial Production Operating LLC, our wholly owned subsidiary through which we operate our properties; (v) “Finance Corp.” refers to Memorial Production Finance Corporation, our Predecessor’s wholly owned subsidiary, whose activities were limited to co-issuing our debt securities and engaging in other activities incidental thereto and which was dissolved following the effective date of the Plan; and (vi) “NGP” refers to Natural Gas Partners. On April 27, 2016, we entered into an agreement pursuant to which the Predecessor agreed to acquire, among other things, all of the equity interests in our Predecessor’s general partner, MEMP GP, from Memorial Resource (the “MEMP GP Acquisition”) for cash consideration of approximately $0.8 million. MEMP GP held an approximate 0.1% general partner interest and 50% of the incentive distribution rights (“IDRs”) in us. In conjunction with the MEMP GP Acquisition, on April 27, 2016, we also entered into an agreement with an NGP affiliate pursuant to which we agreed to acquire the other 50% of the IDRs. The acquisition was accounted for as an equity transaction and no gain or loss was recognized as a result of the acquisition. In connection with the closing of the transactions on June 1, 2016, our Predecessor’s partnership agreement was amended and restated to, among other things, (i) convert the 0.1% general partner interest in the Predecessor held by MEMP GP into a non-economic general partner interest, (ii) cancel the IDRs and (iii) provide that the limited partners of the Predecessor will have the ability to elect the members of MEMP GP’s board of directors. In addition, we terminated the Predecessor’s Omnibus Agreement under which Memorial Resource provided management, administrative and operations personnel to us and our Predecessor’s general partner, and we entered into a transition services agreement with Memorial Resource to manage certain post-closing separation costs and activities. See Note 13 for additional information regarding the MEMP GP Acquisition and the transition services agreement.
Basis of Presentation	Basis of Presentation Our Unaudited Condensed Consolidated Financial Statements included herein have been prepared pursuant to the rules and guidelines of the Securities and Exchange Commission (the “SEC”). The results reported in these Unaudited Condensed Consolidated Financial Statements should not necessarily be taken as indicative of results that may be expected for the entire year. In our opinion, the accompanying Unaudited Condensed Consolidated Financial Statements include all adjustments of a normal recurring nature necessary for fair presentation. Although we believe the disclosures in these financial statements are adequate and make the information presented not misleading, certain information and footnote disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted pursuant to the rules and regulations of the SEC. The inclusion of MEMP GP in our consolidated financial statements was effective June 1, 2016 due to the MEMP GP Acquisition. All material intercompany transactions and balances have been eliminated in preparation of our consolidated financial statements.
Bankruptcy Accounting	Bankruptcy Accounting On January 16, 2017, MEMP and certain of its subsidiaries (collectively with MEMP, the “Debtors”) filed voluntary petitions (the cases commenced thereby, the “Chapter 11 proceedings”) under Chapter 11 of Title 11 of the United States Code (the “Bankruptcy Code” or “Chapter 11”) in the United States Bankruptcy Court for the Southern District of Texas, Houston Division (the “Bankruptcy Court”). The Debtors operated their business as “debtors-in-possession” under the Bankruptcy Code for the period from January 16, 2017 through May 4, 2017. The Unaudited Condensed Consolidated Financial Statements have been prepared as if the Company is a going concern and reflect the application of Accounting Standards Codification 852 “Reorganizations” (“ASC 852”). ASC 852 requires that the financial statements, for periods subsequent to the Chapter 11 filing, distinguish transactions and events that are directly associated with the reorganization from the ongoing operations of the business. Accordingly, certain expenses, gains and losses that were realized or incurred in the bankruptcy proceedings are recorded in “reorganization items, net” on the Company’s condensed statements of consolidated operations.
Comparability of Financial Statements to Prior Periods	Comparability of Financial Statements to Prior Periods As discussed in further detail in Note 3 below, we have adopted and applied the relevant guidance provided in GAAP with respect to the accounting and financial statement disclosures for entities that have emerged from bankruptcy proceedings (“Fresh Start Accounting”). Accordingly, our Unaudited Condensed Consolidated Financial Statements and Notes after May 4, 2017, are not comparable to the Unaudited Condensed Consolidated Financial Statements and Notes prior to that date. To facilitate our financial statement presentations, we refer to the reorganized company in these Unaudited Condensed Consolidated Financial Statements and Notes as the “Successor” for periods subsequent to May 4, 2017 and “Predecessor” for periods prior to May 5, 2017. Furthermore, our Unaudited Condensed Consolidated Financial Statements and Notes have been presented with a “black line” division to delineate the lack of comparability between the Predecessor and Successor.
Use of Estimates	Use of Estimates The preparation of the accompanying Unaudited Condensed Consolidated Financial Statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Significant estimates include, but are not limited to, oil and natural gas reserves; depreciation, depletion, and amortization of proved oil and natural gas properties; future cash flows from oil and natural gas properties; impairment of long-lived assets; fair value of derivatives; fair value of equity compensation; fair values of assets acquired and liabilities assumed in business combinations and asset retirement obligations.
Accrued Liabilities	Accrued Liabilities Current accrued liabilities consisted of the following at the dates indicated (in thousands): Successor Predecessor June 30, December 31, 2017 2016 Accrued general and administrative expenses $ 12,533 $ 3,040 Accrued lease operating expense 8,568 10,411 Accrued capital expenditures 7,948 1,826 Accrued ad valorem tax 2,120 977 Accrued interest payable 1,612 46,417 Asset retirement obligation 941 789 Other 121 1,775 Accrued liabilities $ 33,843 $ 65,235
Supplemental Cash Flows	Supplemental Cash Flows Supplemental cash flows for the periods presented (in thousands): Successor Predecessor Period from Period from May 5, 2017 January 1, 2017 Six Months through through Ended June 30, 2017 May 4, 2017 June 30, 2016 Supplemental cash flows: Cash paid for interest, net of amounts capitalized $ 1,752 $ 6,598 $ 57,589 Cash paid for reorganization items, net 412 11,999 — Noncash investing and financing activities: Increase (decrease) in capital expenditures in payables and accrued liabilities 5,288 3,173 (1,759 ) (Increase) decrease in accounts receivable/payable related to divestitures — — (856 ) Asset retirement obligation removal related to divestitures — — 6,212
New Accounting Pronouncements	New Accounting Pronouncements Compensation —Stock Compensation. In May 2017, the Financial Accounting Standards Board (“FASB”) issued an accounting standards update to clarify and reduce both (i) diversity in practice and (ii) cost and complexity when applying its guidance in the terms and conditions of a share-based payment award. The new guidance is effective for annual periods beginning after December 15, 2017, and interim periods within those annual periods. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Definition of a Business. In January 2017, the FASB issued an accounting standards update to clarify the definition of a business. The definition of a business affects many areas of accounting including acquisitions, disposals, goodwill, and consolidation. The amendments are intended to help companies and other organizations evaluate whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments provide a more robust framework to use in determining when a set of assets and activities is a business. The amendments are effective for annual periods beginning after December 15, 2017, including interim periods within those periods. Early adoption is permitted and the guidance is to be applied on a prospective basis to purchases or disposals of a business or an asset. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Statement of Cash Flows – Restricted Cash (a consensus of the FASB Emerging Issues Task Force). In November 2016, the FASB issued an accounting standards update to clarify the guidance on the classification and presentation of restricted cash in the statement of cash flows. The changes in restricted cash and restricted cash equivalents that result from the transfers between cash, cash equivalents, and restricted cash and restricted cash equivalents should not be presented as cash flow activities in the statement of cash flows. The new guidance is effective for reporting periods beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The new guidance requires transition under a retrospective approach for each period presented. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Statement of Cash Flows – Classification of Certain Cash Receipts and Cash Payments. In August 2016, the FASB issued an accounting standards update to address eight specific cash flow issues with the objective of reducing the current and potential future diversity in practice. The new guidance is effective for reporting periods beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The new guidance requires transition under a retrospective approach for each period presented. If it is impracticable to apply the amendments retrospectively for some of the issues, the amendments for those issues would be applied prospectively as of the earliest date practicable. The Company is currently assessing the impact the adoption of this new guidance will have on our consolidated financial statements and related disclosures. Leases. In February 2016, the FASB issued a revision to lease accounting guidance. The FASB retained a dual model, requiring leases to be classified as either direct financing or operating leases. The classification will be based on criteria that are similar to the current lease accounting treatment. The revised guidance requires lessees to recognize a right-of-use asset and lease liability for all leasing transactions regardless of classification. For leases with a term of 12 months or less, a lessee is permitted to make an accounting policy election by class of underlying asset not to recognize lease assets and lease liabilities. If a lessee makes this election, it should recognize lease expense for such leases generally on a straight-line basis over the lease term. The amendments are effective for financial statements issued for annual periods beginning after December 15, 2018 and interim periods within those fiscal years. Early adoption is permitted for all entities as of the beginning of an interim or annual reporting period. The Company is the lessee under various agreements for office space, compressors, equipment, and surface rentals that are currently accounted for as operating leases. As a result, these new rules will increase reported assets and liabilities. The Company will not early adopt this standard. The Company will apply the revised lease rules for our interim and annual reporting periods starting January 1, 2019 using a modified retrospective approach, including several optional practical expedients related to leases commenced before the effective date. The Company is currently evaluating the impact of these rules on its financial statements and has started the assessment process by evaluating the population of leases under the revised definition. The quantitative impacts of the new standard are dependent on the leases in force at the time of adoption. As a result, the evaluation of the effect of the new standards will extend over future periods. Revenue from Contracts with Customers . In May 2014, the FASB issued guidance regarding the accounting for revenue from contracts with customers. This standard includes a five-step revenue recognition model to depict the transfer of goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Among other things, the standard also eliminates industry-specific revenue guidance and requires enhanced disclosures related to the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers. The guidance is effective for interim and annual reporting periods starting January 1, 2018, and early adoption is permitted. The Company will not early adopt the standard and plans to use a modified retrospective approach upon adoption with the cumulative effect of initial application recognized at the date of initial application subject to certain additional disclosures. The Company is currently evaluating its revenue streams and contracts under the revised standard to determine the impact it is expected to have on the consolidated financial statements and related disclosures. Other accounting standards that have been issued by the FASB or other standards-setting bodies are not expected to have a material impact on the Company’s financial position, results of operations and cash flows.

Fresh Start Accounting (Tables)

Fresh Start Accounting (Tables)	6 Months Ended
	Jun. 30, 2017
Fresh Start Accounting [Abstract]
Reconciliation of the Enterprise Value to the Reorganization Value	The following table is a reconciliation of the enterprise value to the reorganization value of the Successor assets at the Effective Date (in thousands): Enterprise value $ 800,000 Plus: Cash and cash equivalents 20,140 Plus: Other working capital liabilities 63,817 Plus: Other long-term liabilities 97,470 Reorganization value of Successor assets $ 981,427
Schedule of Reorganization and Fresh Start Adjustments	The adjustments included in the following condensed consolidated balance sheet reflect the effect of the transactions contemplated by the Plan (reflected in the column “Reorganization Adjustments”) as well as fair value and other required accounting adjustments resulting from the adoption of fresh start accounting (reflected in the column “Fresh Start Adjustments”). The explanatory notes provide additional information with regard to the adjustments recorded, the methods used to determine the fair values and significant assumptions. As of May 4, 2017 Reorganization Fresh Start Predecessor Adjustments (1) Adjustments Successor (In thousands) ASSETS Current assets: Cash and cash equivalents $ 83,050 $ (62,910 ) (2) $ — $ 20,140 Restricted cash — 7,411 (3) — 7,411 Accounts receivable 33,560 — — 33,560 Short-term derivative instruments 51,329 — — 51,329 Prepaid expenses and other current assets 10,229 675 (4) — 10,904 Total current assets 178,168 (54,824 ) — 123,344 Property and equipment, net 1,551,500 — (894,164 ) (11) 657,336 Long-term derivative instruments 33,800 — — 33,800 Restricted investments 156,443 — — 156,443 Other long-term assets 1,929 8,575 (5) — 10,504 Total assets $ 1,921,840 $ (46,249 ) $ (894,164 ) $ 981,427 LIABILITIES AND EQUITY Current liabilities: Accounts payable $ 1,501 $ 1,389 (6) $ — $ 2,890 Revenues payable 22,747 — — 22,747 Accrued liabilities 36,954 2,939 (7) (1,713 ) (12) 38,180 Current portion of long-term debt 454,799 (454,799 ) (8) — — Total current liabilities 516,001 (450,471 ) (1,713 ) 63,817 Liabilities subject to compromise 1,162,437 (1,162,437 ) (9) — — Long-term debt — 430,000 (8) — 430,000 Asset retirement obligations 158,114 — (62,928 ) (13) 95,186 Deferred tax liabilities 2,206 — — 2,206 Other long-term liabilities 2,481 — (2,403 ) (12) 78 Total liabilities 1,841,239 (1,182,908 ) (67,044 ) 591,287 Commitments and contingencies (see Note 14) Stockholders'/partners' equity: Predecessor common units 80,601 (80,601 ) (10) — — Successor warrants — 4,788 (10) — 4,788 Successor common stock — 3 (10) — 3 Successor additional paid-in capital — 1,212,469 (10) (827,120 ) (14) 385,349 Total stockholders'/ partners' equity 80,601 1,136,659 (827,120 ) 390,140 Total liabilities and equity $ 1,921,840 $ (46,249 ) $ (894,164 ) $ 981,427 Reorganization Adjustments (1) Reflects amounts recorded as of the Effective Date for the implementation of the Plan, including among other items, settlement of the Predecessor’s liabilities subject to compromise, cancellation of the Predecessor’s equity, issuance of the Successor New Common Shares and the Warrants, repayment of certain of Predecessor’s debt and settlement with holders of the Notes. (2) Reflects the changes in cash and cash equivalents, including the following (in thousands): Payment on the Predecessor's revolving credit facility $ (24,799 ) Payment to holders of the Notes (1) (16,446 ) Payment of fees related to Exit Credit Facility (8,575 ) Funding of the professional fees escrow account (7,411 ) Payment of professional fees (4,295 ) Other (1,384 ) Changes in cash and cash equivalents $ (62,910 ) (1) The total cash settlement to the holders of the Notes was approximately $24.6 million, of which $16.4 million was paid upon emergence and $8.2 million was paid post-emergence and is reflected in accrued liabilities in the above condensed consolidated balance sheet. (3) Reflects the transfer to restricted cash to fund the professional fees escrow account. (4) Reflects the pre-payment of certain professional fees. (5) Reflects the deferred financing costs related to the Exit Credit Facility. (6) Reflects the recognition of payables for general unsecured claims. (7) Net increase in accrued liabilities reflects the following (in thousands): Recognition of liability for settlement with holders of the Notes $ 8,193 Payment of professional fees (4,295 ) Recognition of contribution from management (1,500 ) Recognition of settlement with Predecessor common unitholders 1,250 Other (709 ) Net increase in accrued liabilities due to reorganization items $ 2,939 (8) Reflects a repayment of $24.8 million on the Predecessor’s revolving credit facility and the reclassification of $430.0 million in borrowings under the Exit Credit Facility to long-term debt. (9) Settlement of liabilities subject to compromise and the resulting net gain were determined as follows (in thousands): Accounts payable $ 1,389 Accrued interest payable 49,796 Debt 1,111,252 Total liabilities subject to compromise of Predecessor 1,162,437 Recognition of payables for general unsecured claims (1,389 ) Recognition of settlement with holders of the Notes (24,639 ) Issuance of common stock to holders of the Notes (377,645 ) Gain on settlement of liabilities subject to compromise $ 758,764 (10) Net increase in our stockholders’/partners’ equity reflects the following (in thousands): Issuance of common stock to holders of the Notes $ 377,645 Issuance of common stock to Predecessor common unitholders 7,707 Cancellation of the Predecessor's units issued and outstanding 80,601 Recognition on gain on settlement of liabilities subject to compromise 758,764 Recognition of issuance of common stock to Predecessor common unitholders (7,707 ) Recognition of issuance of warrants to Predecessor common unitholders (4,788 ) Recognition of contribution from management 1,500 Recognition of settlement with Predecessor common unitholders (1,250 ) Par value of common stock (3 ) Change in Successor additional paid-in capital 1,212,469 Issuance of warrants to Predecessor common unitholders 4,788 Par value of common stock 3 Predecessor units issued and outstanding (80,601 ) Net increase in capital accounts $ 1,136,659 Fresh Start Adjustments (11) Reflects a decrease of property and equipment, net based on the methodology discussed above and the elimination of accumulated depreciation, depletion and impairment. The fresh start adjustments to property and equipment, net are as follow: Predecessor Fresh Start Adjustments Successor (In thousands) Property and equipment at cost: Proved oil and natural gas properties $ 3,124,137 $ (2,615,076 ) $ 509,061 Support equipment and facilities 199,463 (101,883 ) 97,580 Unproved oil and natural gas properties — 44,688 44,688 Other 15,420 (9,413 ) 6,007 Property and equipment 3,339,020 (2,681,684 ) 657,336 Accumulated depreciation, depletion and impairment (1,787,520 ) 1,787,520 — Property and equipment, net $ 1,551,500 $ (894,164 ) $ 657,336 (12) Reflects the write-off of the deferred rent and loss on sublease liabilities. (13) Reflects a decrease of $62.9 million for asset retirement obligations. The fair value of asset retirement obligations were estimated using valuation techniques that convert future cash flows to a single discounted amount. Significant inputs to the valuation include estimates of: (i) plugging and abandonment costs per well based on existing regulatory requirements; (ii) remaining life per well; (iii) future inflation factors; and (iv) a credit-adjusted risk free rate. (14) Reflects the cumulative impact of our fresh start accounting adjustments discussed above.
Schedule of Reorganization Items, Net	The following table summarizes the components of reorganization items, net included in the accompanying unaudited condensed statements of consolidated operations (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 January 1, through through 2017 through June 30, 2017 May 4, 2017 May 4, 2017 Gain on settlement of liabilities subject to compromise $ — $ 758,764 $ 758,764 Fresh start valuation adjustments — (827,120 ) (827,120 ) Professional fees (349 ) (12,239 ) (19,824 ) Other — (526 ) (594 ) Reorganization items, net $ (349 ) $ (81,121 ) $ (88,774 )

Summary of Significant Accoun24

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Current Accrued Liabilities	Current accrued liabilities consisted of the following at the dates indicated (in thousands): Successor Predecessor June 30, December 31, 2017 2016 Accrued general and administrative expenses $ 12,533 $ 3,040 Accrued lease operating expense 8,568 10,411 Accrued capital expenditures 7,948 1,826 Accrued ad valorem tax 2,120 977 Accrued interest payable 1,612 46,417 Asset retirement obligation 941 789 Other 121 1,775 Accrued liabilities $ 33,843 $ 65,235
Summary of Supplemental Cash Flows	Supplemental cash flows for the periods presented (in thousands): Successor Predecessor Period from Period from May 5, 2017 January 1, 2017 Six Months through through Ended June 30, 2017 May 4, 2017 June 30, 2016 Supplemental cash flows: Cash paid for interest, net of amounts capitalized $ 1,752 $ 6,598 $ 57,589 Cash paid for reorganization items, net 412 11,999 — Noncash investing and financing activities: Increase (decrease) in capital expenditures in payables and accrued liabilities 5,288 3,173 (1,759 ) (Increase) decrease in accounts receivable/payable related to divestitures — — (856 ) Asset retirement obligation removal related to divestitures — — 6,212

Acquisitions and Divestitures (

Acquisitions and Divestitures (Tables)	6 Months Ended
	Jun. 30, 2017
Business Combinations [Abstract]
Acquisition and Divestiture Related Expenses	Acquisition and divestiture related expenses for both related party and third party transactions are included in general and administrative expenses in the accompanying unaudited condensed statements of consolidated operations for the periods indicated below (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 $ — $ — $ 927 $ — $ 1,013
Schedule of Income (Loss) before Income Taxes Including (Gain) Loss on Divestiture	The income (loss) before income taxes, including the associated (gain) loss on sale of properties, related to the Permian Divestiture and Rockies Divestiture, which is included in the accompanying unaudited condensed statements of consolidated operations of the Company, is as follows (in thousands): Predecessor Three Months Ended Six Months Ended June 30, 2016 June 30, 2016 Permian Divestiture $ 6,855 $ 4,832 Rockies Divestiture (5,860 ) (7,620 )

Fair Value Measurements of Fi26

Fair Value Measurements of Financial Instruments (Tables)	6 Months Ended
	Jun. 30, 2017
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table presents the gross derivative assets and liabilities that are measured at fair value on a recurring basis at June 30, 2017 and December 31, 2016 for each of the fair value hierarchy levels: Successor Fair Value Measurements at June 30, 2017 Using Quoted Prices in Significant Other Significant Active Market Observable Inputs Unobservable Inputs (Level 1) (Level 2) (Level 3) Fair Value (In thousands) Assets: Commodity derivatives $ — $ 88,797 $ — $ 88,797 Total assets $ — $ 88,797 $ — $ 88,797 Liabilities: Commodity derivatives $ — $ 10,037 $ — $ 10,037 Total liabilities $ — $ 10,037 $ — $ 10,037 Predecessor Fair Value Measurements at December 31, 2016 Using Quoted Prices in Significant Other Significant Active Market Observable Inputs Unobservable Inputs (Level 1) (Level 2) (Level 3) Fair Value (In thousands) Assets: Commodity derivatives $ — $ 189,851 $ — $ 189,851 Total assets $ — $ 189,851 $ — $ 189,851 Liabilities: Commodity derivatives $ — $ 17,757 $ — $ 17,757 Total liabilities $ — $ 17,757 $ — $ 17,757

Risk Management and Derivativ27

Risk Management and Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Open Commodity Positions	At June 30, 2017, we had the following open commodity positions: Remaining 2017 2018 Natural Gas Derivative Contracts: Fixed price swap contracts: Average monthly volume (MMBtu) 1,295,000 1,102,000 Weighted-average fixed price $ 3.96 $ 3.91 Crude Oil Derivative Contracts: Fixed price swap contracts: Average monthly volume (Bbls) 129,000 122,000 Weighted-average fixed price $ 71.44 $ 75.69 Collar contracts: Average monthly volume (Bbls) 10,000 — Weighted-average floor price $ 45.00 $ — Weighted-average ceiling price $ 54.50 $ — NGL Derivative Contracts: Fixed price swap contracts: Average monthly volume (Bbls) 78,400 65,700 Weighted-average fixed price $ 30.29 $ 24.13
Gross Fair Value of Derivative Instruments by Appropriate Balance Sheet	The following table summarizes both: (i) the gross fair value of derivative instruments by the appropriate balance sheet classification even when the derivative instruments are subject to netting arrangements and qualify for net presentation in the balance sheet and (ii) the net recorded fair value as reflected on the balance sheet at June 30, 2017 and December 31, 2016. There was no cash collateral received or pledged associated with our derivative instruments since most of the counterparties, or certain of their affiliates, to our derivative contracts are lenders under our credit agreement. Successor Predecessor Asset Derivatives Liability Derivatives Asset Derivatives Liability Derivatives June 30, June 30, December 31, December 31, Type Balance Sheet Location 2017 2017 2016 2016 (In thousands) Commodity contracts $ 63,214 $ 9,916 $ 86,335 $ 16,871 Gross fair value 63,214 9,916 86,335 16,871 Netting arrangements (9,916 ) (9,916 ) (16,871 ) (16,871 ) Net recorded fair value Short-term derivative instruments $ 53,298 $ — $ 69,464 $ — Commodity contracts $ 25,583 $ 121 $ 103,515 $ 885 Gross fair value 25,583 121 103,515 885 Netting arrangements (121 ) (121 ) (885 ) (885 ) Net recorded fair value Long-term derivative instruments $ 25,462 $ — $ 102,630 $ —
Unrealized and Realized Gains and Losses Related to Derivative Instruments	The following table details the gains and losses related to derivative instruments for the periods indicated (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 (Gain) loss on commodity derivatives $ (1,915 ) $ (12,835 ) $ 124,580 $ (23,076 ) $ 72,835 Interest expense, net — — 1,844 — 5,526

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	6 Months Ended
	Jun. 30, 2017
Asset Retirement Obligation Disclosure [Abstract]
Summary of Changes in Asset Retirement Obligations	The Company’s asset retirement obligations primarily relate to the Company’s portion of future plugging and abandonment costs for wells and related facilities. The following table presents the changes in the asset retirement obligations for the period from January 1, 2017 through May 4, 2017 and for the period from May 5, 2017 through June 30, 2017 (in thousands): Asset retirement obligations at beginning of period (Predecessor) $ 155,702 Liabilities added from acquisitions or drilling 6 Liabilities settled (164 ) Accretion expense 3,407 Revision of estimates 104 Asset retirement obligations at May 4, 2017 (Predecessor) $ 159,055 Fresh start adjustments (1) (62,928 ) Asset retirement obligations at May 5, 2017 (Successor) $ 96,127 Liabilities added from acquisition or drilling 8 Liabilities settled — Accretion expense 1,027 Revision of estimates 69 Asset retirement obligation at end of period (Successor) 97,231 Less: Current Portion (941 ) Asset retirement obligations - long-term portion (Successor) $ 96,290 (1) As a result of the application of fresh start accounting, the Successor recorded its asset retirement obligations at fair value as of the Effective Date.

Debt (Tables)

Debt (Tables)	6 Months Ended
	Jun. 30, 2017
Debt Disclosure [Abstract]
Consolidated Debt Obligations	The following table presents our consolidated debt obligations at the dates indicated: Successor Predecessor June 30, December 31, 2017 2016 (In thousands) Successor $1.0 billion Exit Credit Facility, variable-rate, due March 2021 (1) $ 418,000 $ — Predecessor $2.0 billion revolving credit facility, variable-rate, due March 2018 (1) — 511,652 2021 Senior Notes, fixed-rate, due May 2021 (2) (4) — 646,287 2022 Senior Notes, fixed-rate, due August 2022 (3) (4) — 464,965 Total debt 418,000 1,622,904 Less: current portion of long-term debt (5) — (1,622,904 ) Long-term debt $ 418,000 $ — (1) The carrying amount of our Predecessor’s revolving credit facility and Successor Exit Credit Facility approximates fair value because the interest rates are variable and reflective of market rates. (2) The estimated fair value of our 2021 Senior Notes was $314.3 million at December 31, 2016. (3) The estimated fair value of our 2022 Senior Notes was $223.2 million at December 31, 2016. (4) The estimated fair value is based on quoted market prices and is classified as Level 2 within the fair value hierarchy. (5) Due to the existing and anticipated financial covenant violations as of December 31, 2016, the borrowings under the Predecessor’s revolving credit facility and the Notes were classified as current at December 31, 2016. There were no existing or anticipated financial covenant violations as of June 30, 2017.
Summary of Weighted-Average Interest Rates Paid Excluding Commitment Fees on Variable-Rate Debt Obligations	The following table presents the weighted-average interest rates paid, excluding commitment fees, on our consolidated variable-rate debt obligations for the periods presented: Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 Successor Exit Credit Facility 4.91% n/a n/a n/a n/a Predecessor's revolving credit facility n/a 3.80% 3.30% 4.04% 2.85%

Equity and Distributions (Table

Equity and Distributions (Tables)	6 Months Ended
	Jun. 30, 2017
Equity and Distributions [Line Items]
Summary of Changes in Number of Outstanding Common Units and Shares of Common Stock	The following table summarizes the changes in the number of outstanding common units and shares of common stock: Common Units/Shares Balance, December 31, 2016 (Predecessor) 83,827,920 Restricted common units issued — Restricted common units forfeited (12,952 ) Restricted common units repurchased (1) (14,681 ) Balance, May 4, 2017 (Predecessor) 83,800,287 Cancellation of Predecessor common units (83,800,287 ) Balance, May 4, 2017 (Predecessor) — Issuance of Successor common stock 25,000,000 Balance, May 5, 2017 (Successor) 25,000,000 Issuance of Successor common stock — Balance, June 30, 2017 (Successor) 25,000,000 1. Restricted common units are generally net-settled by unitholders to cover the required withholding tax upon vesting. Unitholders surrendered units with value equivalent to the employees’ minimum statutory obligation for the applicable income and other employment taxes. Total payments remitted for the employees’ tax obligations to the appropriate taxing authorities were less than approximately $0.1 million for the period from January 1, 2017 through May 4, 2017. The net-settlement had the effect of unit repurchase by the Company as they reduced the number of units that would have otherwise been outstanding as a result of the vesting and did not represent an expense to the Company.
Summary of Quarterly Cash Distribution Rates and Amounts	The following table summarizes our Predecessor’s declared quarterly cash distribution rates and amounts with respect to the quarter indicated (dollars in millions, except per unit amounts): Distribution Amount Aggregate Received by Quarter Declaration Date Record Date Payment Date Per Unit Distribution Affiliates 2 nd July 26, 2016 August 5, 2016 August 12, 2016 $ 0.0300 $ 2.5 $ < 0.1 1 st April 26, 2016 May 6, 2016 May 13, 2016 $ 0.0300 $ 2.5 $ < 0.1 4 th January 26, 2016 February 5, 2016 February 12, 2016 $ 0.1000 $ 8.3 $ < 0.1
Warrants [Member]
Equity and Distributions [Line Items]
Summary of Assumptions used to Estimate the Fair Value	The fair values for the warrants upon issuance have been estimated using the Black-Scholes option pricing model using the following assumptions: Warrants Issued in Successor Period Risk-free interest rate 2.06 % Dividend yield — Expected life (in years) 5.0 Expected volatility 50.0 % Strike Price $ 42.60 Calculated fair value $ 2.20

Earnings per Share_Unit (Tables

Earnings per Share/Unit (Tables)	6 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Calculation of Earnings (Loss) Per Share/Unit	The following sets forth the calculation of earnings (loss) per share/unit, or EPS/EPU, for the periods indicated (in thousands, except per share/unit amounts): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, Six Months through through Ended 2017 through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 Net income (loss) attributable to Successor/Predecessor $ (906 ) $ (74,578 ) $ (147,550 ) $ (90,955 ) $ (185,647 ) Less: predecessor's general partner's 0.1% interest in net income (loss) (1) — — (128 ) — (168 ) Net (income) allocated to participating restricted stockholders — — — — — Net income (loss) available to common stockholders/limited partners $ (906 ) $ (74,578 ) $ (147,422 ) $ (90,955 ) $ (185,479 ) Common shares/units: Common shares/units outstanding — basic 25,000 83,800 83,007 83,807 82,971 Dilutive effect of potential common shares/units — — — — — Common shares/units outstanding — diluted 25,000 83,800 83,007 83,807 82,971 Net earnings per share/unit: Basic $ (0.04 ) $ (0.89 ) $ (1.78 ) $ (1.09 ) $ (2.24 ) Diluted $ (0.04 ) $ (0.89 ) $ (1.78 ) $ (1.09 ) $ (2.24 ) Antidilutive stock options (2) 516 — — — — Antidilutive warrants (3) 2,174 — — — — (1) As a result of repurchases under the December 2014 repurchase program, our Predecessor’s general partner had an approximate average 0.105% interest in us prior to the MEMP GP Acquisition for the three and six months ended June 30, 2016. (2) Amount represents options to purchase common stock that are excluded from the diluted net earnings per share calculations because of their antidilutive effect. (3) Amount represents warrants to purchase common stock that are excluded from the diluted net earnings per share calculations because of their antidilutive effect.

Long-Term Incentive Plans (Tabl

Long-Term Incentive Plans (Tables)	6 Months Ended
	Jun. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Information Regarding Restricted Stock Unit Awards	The following table summarizes information regarding the restricted stock unit awards granted under the MIP for the period presented: Weighted- Average Grant Number of Date Fair Value Units per Unit (1) Restricted stock units outstanding at May 5, 2017 (Successor) 614,754 $ 13.77 Granted 143,341 $ 13.77 Forfeited (99,232 ) $ 13.77 Vested — $ — Restricted stock units outstanding at June 30, 2017 (Successor) 658,863 $ 13.77 (1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.
Summary of Fair Value Assumptions	The fair value for stock options granted during the period have been estimated using the Black-Scholes option pricing model using the following assumptions: Awards Issued in Successor Period Risk-free interest rate 2.06 % Dividend yield — Expected life (in years) 6.0 Expected volatility 50.0 % Strike Price $ 21.58 Calculated fair value per stock option $ 5.01
Summary of Stock Option Awards	The following table summarizes information regarding the stock option awards granted under the MIP for the period presented: Weighted- Average Grant Number of Date Fair Value Units per Unit (1) Stock options outstanding at May 4, 2017 (Successor) 614,754 $ 5.01 Granted — $ — Forfeited (99,232 ) $ 5.01 Vested — $ — Stock Options outstanding at June 30, 2017 (Successor) 515,522 $ 5.01 (1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.
Summary of Information Regarding Phantom Unit Awards	The following table summarizes information regarding the Predecessor’s phantom unit awards granted under the LTIP: Number of Units Phantom units outstanding at December 31, 2016 (Predecessor) 5,980,693 Granted — Forfeited (132,347 ) Vested (155,601 ) Phantom units outstanding at May 4, 2017 (Predecessor) 5,692,745 Cancelled (5,692,745 ) Phantom units outstanding at June 30, 2017 (Successor) —
Summary of Amount of Compensation Expense Recognized	The following table summarizes the amount of recognized compensation expense associated with the MIP and LTIP awards that are reflected in the accompanying unaudited condensed statements of consolidated operations for the periods presented (in thousands): Successor Predecessor Period from Period from Period from May 5, 2017 April 1, 2017 Three Months January 1, 2017 Six Months through through Ended through Ended June 30, 2017 May 4, 2017 June 30, 2016 May 4, 2017 June 30, 2016 Equity classified awards Restricted stock units (Successor) $ 426 $ — $ — $ — $ — Restricted stock options (Successor) 101 — — — — Restricted common units (Predecessor) — 2,644 2,507 3,713 4,999 Liability classified awards Phantom units (Predecessor) — (102 ) 224 (46 ) 300 $ 527 $ 2,542 $ 2,731 $ 3,667 $ 5,299
Restricted Common Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Summary of Information Regarding Restricted Stock Unit Awards	The following table summarizes information regarding the restricted common unit awards granted under the LTIP for the periods presented: Weighted- Average Grant Number of Date Fair Value Units per Unit (1) Restricted common units outstanding at December 31, 2016 (Predecessor) 432,160 $ 15.00 Granted — $ — Forfeited (12,952 ) $ 9.51 Vested (43,045 ) $ 10.40 Cancelled (376,163 ) $ 15.72 Restricted common units outstanding at May 4, 2017 (Predecessor) — $ — (1) Determined by dividing the aggregate grant date fair value of awards by the number of awards issued.

Related Party Transactions (Tab

Related Party Transactions (Tables)	6 Months Ended
	Jun. 30, 2017
Omnibus Agreement [Member]
Related Party Transaction [Line Items]
Schedule of Amount of General and Administrative Costs and Expenses Recognized	The following table summarizes the amount of general and administrative expenses recognized under the Predecessor’s Omnibus Agreement that are reflected in the accompanying unaudited condensed statements of consolidated operations for the periods presented (in thousands): Predecessor Three Months Ended For the Six Months Ended June 30, June 30, 2016 2016 $ 4,418 $ 11,867

Organization and Basis of Pre34

Organization and Basis of Presentation - Additional Information (Detail)	Apr. 27, 2016USD ($)	Jun. 30, 2017Segment
Consolidation And Basis Of Presentation [Line Items]
Number of reportable business segments | Segment		1
MEMP GP [Member]
Consolidation And Basis Of Presentation [Line Items]
Acquisition purchase price	$ 800,000
Partnership ownership percentage	0.10%
Gain (loss) on acquisition	$ 0
Related party transaction, description of transaction		In connection with the closing of the transactions on June 1, 2016, our Predecessor’s partnership agreement was amended and restated to, among other things, (i) convert the 0.1% general partner interest in the Predecessor held by MEMP GP into a non-economic general partner interest, (ii) cancel the IDRs and (iii) provide that the limited partners of the Predecessor will have the ability to elect the members of MEMP GP’s board of directors.
General Partner [Member] | Incentive Distribution Rights ("IDRs") [Member] | MEMP GP [Member]
Consolidation And Basis Of Presentation [Line Items]
Partnership ownership percentage	50.00%
Natural Gas Partners [Member] | Incentive Distribution Rights ("IDRs") [Member]
Consolidation And Basis Of Presentation [Line Items]
Agreed ownership interest percentage to acquire	50.00%

Emergence from Voluntary Reor35

Emergence from Voluntary Reorganization under Chapter 11 - Additional Information (Detail) - USD ($)	May 04, 2017	Jun. 30, 2017
Reorganizations [Line Items]
Stock issued during period	25,000,000	0
Common stock, par value		$ 0.0001
Percentage of new common shares issued to predecessor	2.00%
Aggregate cash amount to predecessor	$ 1,300,000
Common Stock [Member]
Reorganizations [Line Items]
Stock issued during period	25,000,000
Warrants [Member]
Reorganizations [Line Items]
Warrant life period	5 years
Percentage of common shares to be issued upon exercise of warrants	8.00%
Warrant exercise price	$ 42.60
Plan of Reorganization [Member]
Reorganizations [Line Items]
Warrant life period	5 years
Percentage of common shares to be issued upon exercise of warrants	8.00%
Common stock, par value	$ 0.0001
Percentage of new common shares issued to predecessor	2.00%
Aggregate cash amount to predecessor	$ 1,300,000
Plan of Reorganization [Member] | Management Incentive Plan [Member]
Reorganizations [Line Items]
Aggregate shares of common stock available for grants	2,322,404
Plan of Reorganization [Member] | Exit Credit Facility [Member]
Reorganizations [Line Items]
Revolving credit facility	$ 1,000,000,000
Plan of Reorganization [Member] | Common Stock [Member]
Reorganizations [Line Items]
Stock issued during period	25,000,000
Plan of Reorganization [Member] | Warrants [Member]
Reorganizations [Line Items]
Warrant issued during period	2,173,913
Warrant exercise price	$ 42.60
Noteholder Plan Support Agreement [Member]
Reorganizations [Line Items]
Percentage of new common shares issued	98.00%
Unsecured noteholders to receive pro rata share of cash distribution	$ 24,600,000

Fresh Start Accounting - Additi

Fresh Start Accounting - Additional Information (Detail) - USD ($)	May 04, 2017	Jun. 30, 2017
Fresh Start Adjustment [Line Items]
Enterprise value	$ 800,000,000
Repayment of predecessor’s revolving credit facility		$ 12,000,000
Reorganization Adjustments [Member]
Fresh Start Adjustment [Line Items]
Repayment of predecessor’s revolving credit facility	24,800,000
Reclassification of borrowings under the exit credit facility to long-term debt	430,000,000
Fresh Start Adjustments [Member]
Fresh Start Adjustment [Line Items]
Decrease in asset retirement obligations	62,900,000
Maximum [Member]
Fresh Start Adjustment [Line Items]
Percentage of voting shares to be received by voting share holders		50.00%
Enterprise value	900,000,000
Minimum
Fresh Start Adjustment [Line Items]
Enterprise value	$ 700,000,000

Fresh Start Accounting - Reconc

Fresh Start Accounting - Reconciliation of the Enterprise Value to the Reorganization Value (Detail) $ in Thousands	May 04, 2017USD ($)
Reorganizations [Abstract]
Enterprise value	$ 800,000
Plus: Cash and cash equivalents	20,140
Plus: Other working capital liabilities	63,817
Plus: Other long-term liabilities	97,470
Reorganization value of Successor assets	$ 981,427

Fresh Start Accounting - Applic

Fresh Start Accounting - Application of Fresh Start Accounting to Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2017		May 05, 2017	May 04, 2017	Dec. 31, 2016		Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 10,951			$ 20,140
Restricted cash	7,561			7,411
Accounts receivable	29,894			33,560
Short-term derivative instruments	53,298			51,329
Prepaid expenses and other current assets	8,814			10,904
Total current assets	110,518			123,344
Property and equipment, net	663,867			657,336
Long-term derivative instruments	25,462			33,800
Restricted investments	156,566			156,443
Other long-term assets	10,212			10,504
Total assets	966,625			981,427
Current liabilities:
Accounts payable	5,446			2,890
Revenues payable	21,681			22,747
Accrued liabilities	33,843			38,180
Current portion of long-term debt	0	[1]		0
Total current liabilities	60,970			63,817
Liabilities subject to compromise				0
Long-term debt	418,000			430,000
Asset retirement obligations	96,290			95,186
Deferred tax liabilities	1,614			2,206
Other long-term liabilities	0			78
Total liabilities	576,874			591,287
Commitments and contingencies (see Note 14)				0
Stockholders'/ partners' equity:
Predecessor common units				0
Successor warrants	4,788			4,788
Successor common stock	3			3
Successor additional paid-in capital	385,866			385,349
Total stockholders' equity	389,751		$ 390,140	390,140
Total liabilities and equity	$ 966,625			981,427
Reorganization Adjustments [Member]
Current assets:
Cash and cash equivalents				(62,910)
Restricted cash				7,411
Accounts receivable				0
Short-term derivative instruments				0
Prepaid expenses and other current assets				675
Total current assets				(54,824)
Property and equipment, net				0
Long-term derivative instruments				0
Restricted investments				0
Other long-term assets				8,575
Total assets				(46,249)
Current liabilities:
Accounts payable				1,389
Revenues payable				0
Accrued liabilities				2,939
Current portion of long-term debt				(454,799)
Total current liabilities				(450,471)
Liabilities subject to compromise				(1,162,437)
Long-term debt				430,000
Asset retirement obligations				0
Deferred tax liabilities				0
Other long-term liabilities				0
Total liabilities				(1,182,908)
Commitments and contingencies (see Note 14)				0
Stockholders'/ partners' equity:
Predecessor common units				(80,601)
Successor warrants				4,788
Successor common stock				3
Successor additional paid-in capital				1,212,469
Total partners' equity				1,136,659
Total liabilities and equity				(46,249)
Fresh Start Adjustments [Member]
Current assets:
Cash and cash equivalents				0
Restricted cash				0
Accounts receivable				0
Short-term derivative instruments				0
Prepaid expenses and other current assets				0
Total current assets				0
Property and equipment, net				(894,164)
Long-term derivative instruments				0
Restricted investments				0
Other long-term assets				0
Total assets				(894,164)
Current liabilities:
Accounts payable				0
Revenues payable				0
Accrued liabilities				(1,713)
Current portion of long-term debt				0
Total current liabilities				(1,713)
Liabilities subject to compromise				0
Long-term debt				0
Asset retirement obligations				(62,928)
Deferred tax liabilities				0
Other long-term liabilities				(2,403)
Total liabilities				(67,044)
Commitments and contingencies (see Note 14)				0
Stockholders'/ partners' equity:
Predecessor common units				0
Successor warrants				0
Successor common stock				0
Successor additional paid-in capital				(827,120)
Total partners' equity				(827,120)
Total liabilities and equity				(894,164)
Predecessor [Member]
Current assets:
Cash and cash equivalents				20,140	$ 15,373		$ 0	$ 599
Restricted cash				0	0
Accounts receivable				33,560	34,584
Short-term derivative instruments				51,329	69,464
Prepaid expenses and other current assets				10,229	13,163
Total current assets				178,168	132,584
Property and equipment, net				1,551,500	1,579,702
Long-term derivative instruments				33,800	102,630
Restricted investments				156,443	156,234
Other long-term assets				1,929	2,104
Total assets				1,921,840	1,973,254
Current liabilities:
Accounts payable				1,501	4,353
Revenues payable				22,747	21,285
Accrued liabilities				36,954	65,235
Current portion of long-term debt				454,799	1,622,904	[1]
Total current liabilities				516,001	1,713,777
Liabilities subject to compromise				1,162,437
Long-term debt				0	0
Asset retirement obligations				158,114	154,913
Deferred tax liabilities				2,206	2,280
Other long-term liabilities				2,481	2,795
Total liabilities				1,841,239	1,873,765
Commitments and contingencies (see Note 14)				0
Stockholders'/ partners' equity:
Predecessor common units				80,601
Successor warrants				0
Successor common stock				0
Successor additional paid-in capital				0
Total partners' equity				80,601	99,489
Total liabilities and equity				1,921,840	$ 1,973,254
Predecessor [Member] | Reorganization Adjustments [Member]
Current assets:
Cash and cash equivalents				83,050
Current liabilities:
Liabilities subject to compromise				$ 1,162,437
[1]	Due to the existing and anticipated financial covenant violations as of December 31, 2016, the borrowings under the Predecessor’s revolving credit facility and the Notes were classified as current at December 31, 2016. There were no existing or anticipated financial covenant violations as of June 30, 2017.

Fresh Start Accounting - Summar

Fresh Start Accounting - Summary of Changes in Cash and Cash Equivalents (Details) - USD ($) $ in Thousands		May 04, 2017	Jun. 30, 2017
Payment to holders of the Notes			$ (8,193)
Net change in cash and cash equivalents			$ (9,189)
Reorganization Adjustments [Member]
Payment on the Predecessor's revolving credit facility		$ (24,799)
Payment to holders of the Notes	[1]	(16,446)
Payment of fees related to Exit Credit Facility		(8,575)
Funding of the professional fees escrow account		(7,411)
Payment of professional fees		(4,295)
Other		(1,384)
Net change in cash and cash equivalents		$ (62,910)
[1]	(1)The total cash settlement to the holders of the Notes was approximately $24.6 million, of which $16.4 million was paid upon emergence and $8.2 million was paid post-emergence and is reflected in accrued liabilities in the above condensed consolidated balance sheet

Fresh Start Accounting - Summ40

Fresh Start Accounting - Summary of Changes in Cash and Cash Equivalents (Parenthetical) (Details) - USD ($) $ in Thousands		May 04, 2017	Jun. 30, 2017
Total cash settlement to the holders of the notes			$ 8,193
Reorganization Adjustments [Member]
Total cash settlement to the holders of the notes	[1]	$ 16,446
Reorganization Adjustments [Member] | Paid Upon Emergence [Member]
Total cash settlement to the holders of the notes		16,400
Reorganization Adjustments [Member] | Paid Post-emergence [Member] | Accrued Liabilities [Member]
Total cash settlement to the holders of the notes		8,200
Reorganization Adjustments [Member] | Notes [Member]
Total cash settlement to the holders of the notes		$ 24,600
[1]	(1)The total cash settlement to the holders of the Notes was approximately $24.6 million, of which $16.4 million was paid upon emergence and $8.2 million was paid post-emergence and is reflected in accrued liabilities in the above condensed consolidated balance sheet

Fresh Start Accounting - Summ41

Fresh Start Accounting - Summary of Net Increase in Accrued liabilities (Details) - Reorganization Adjustments [Member] $ in Thousands	May 04, 2017USD ($)
Net Increase in Accrued Liabilities [Abstract]
Recognition of liability for settlement with holders of the Notes	$ 8,193
Payment of professional fees	(4,295)
Recognition of contribution from management	(1,500)
Recognition of settlement with Predecessor common unitholders	1,250
Other	(709)
Net increase in accrued liabilities due to reorganization items	$ 2,939

Fresh Start Accounting - Schedu

Fresh Start Accounting - Schedule of Settlement of Liabilities Subject to Compromise and Resulting Net Gain (Detail) - USD ($) $ in Thousands	May 04, 2017	May 04, 2017	Jun. 30, 2017	May 04, 2017	Jun. 30, 2016
Fresh Start Adjustment [Line Items]
Total liabilities subject to compromise of Predecessor	$ 0	$ 0		$ 0
Payment to holders of the Notes			$ (8,193)
Gain on settlement of liabilities subject to compromise			$ 0
Predecessor [Member]
Fresh Start Adjustment [Line Items]
Total liabilities subject to compromise of Predecessor	1,162,437	1,162,437		1,162,437
Payment to holders of the Notes				(16,446)	$ 0
Gain on settlement of liabilities subject to compromise		758,764		758,764
Reorganization Adjustments [Member]
Fresh Start Adjustment [Line Items]
Total liabilities subject to compromise of Predecessor	(1,162,437)	(1,162,437)		(1,162,437)
Recognition of payables for general unsecured claims	(1,389)
Payment to holders of the Notes	(24,639)
Issuance of common stock to holders of the Notes	(377,645)
Gain on settlement of liabilities subject to compromise	758,764
Reorganization Adjustments [Member] | Predecessor [Member]
Fresh Start Adjustment [Line Items]
Accounts payable	1,389	1,389		1,389
Accrued interest payable	49,796	49,796		49,796
Debt	1,111,252	1,111,252		1,111,252
Total liabilities subject to compromise of Predecessor	$ 1,162,437	$ 1,162,437		$ 1,162,437

Fresh Start Accounting - Sche43

Fresh Start Accounting - Schedule of Net Increase in Stockholders'/Partners' Equity (Detail) - USD ($) $ in Thousands	May 04, 2017	May 04, 2017	Jun. 30, 2017	May 04, 2017
Fresh Start Adjustment [Line Items]
Recognition on gain on settlement of liabilities subject to compromise			$ 0
Par value of common stock				$ (377,645)
Successor common stock	$ 3	$ 3	$ 3	3
Predecessor [Member]
Fresh Start Adjustment [Line Items]
Recognition on gain on settlement of liabilities subject to compromise		758,764		758,764
Successor common stock	0	0		0
Reorganization Adjustments [Member]
Fresh Start Adjustment [Line Items]
Issuance of common stock	377,645
Recognition on gain on settlement of liabilities subject to compromise	758,764
Contribution from management	1,500
Par value of common stock	(3)
Change in Successor additional paid-in capital	1,212,469	1,212,469		1,212,469
Successor common stock	3	3		3
Net increase in capital accounts	1,136,659
Reorganization Adjustments [Member] | Predecessor [Member]
Fresh Start Adjustment [Line Items]
Issuance of common stock	7,707
Cancellation of the Predecessor's units issued and outstanding	80,601
Recognition of issuance of common stock to Predecessor common unitholders	(7,707)
Recognition of issuance of warrants to Predecessor common unitholders	(4,788)
Recognition of settlement with Predecessor common unitholders	(1,250)
Issuance of warrants to Predecessor common unitholders	4,788
Predecessor units issued and outstanding	$ (80,601)	$ (80,601)		$ (80,601)

Fresh Start Accounting - Sche44

Fresh Start Accounting - Schedule of Fresh Start Adjustments to Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	May 04, 2017	Dec. 31, 2016
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method	$ 565,899	$ 657,336
Support equipment and facilities	100,311
Other	6,007	6,007
Accumulated depreciation, depletion and impairment	(8,350)	0
Property and equipment, net	$ 663,867	657,336
Support Equipment and Facilities [Member]
Property and equipment, at cost:
Support equipment and facilities		97,580
Fresh Start Adjustments [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		(2,681,684)
Other		(9,413)
Accumulated depreciation, depletion and impairment		1,787,520
Property and equipment, net		(894,164)
Fresh Start Adjustments [Member] | Support Equipment and Facilities [Member]
Property and equipment, at cost:
Support equipment and facilities		(101,883)
Proved Oil and Natural Gas Properties [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		509,061
Proved Oil and Natural Gas Properties [Member] | Fresh Start Adjustments [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		(2,615,076)
Unproved Oil and Natural Gas Properties [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		44,688
Unproved Oil and Natural Gas Properties [Member] | Fresh Start Adjustments [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		44,688
Predecessor [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		3,339,020	$ 3,115,012
Support equipment and facilities			199,093
Other		15,420	15,344
Accumulated depreciation, depletion and impairment		(1,787,520)	(1,749,747)
Property and equipment, net		1,551,500	$ 1,579,702
Predecessor [Member] | Support Equipment and Facilities [Member]
Property and equipment, at cost:
Support equipment and facilities		199,463
Predecessor [Member] | Proved Oil and Natural Gas Properties [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		3,124,137
Predecessor [Member] | Unproved Oil and Natural Gas Properties [Member]
Property and equipment, at cost:
Oil and natural gas properties, successful efforts method		$ 0

Fresh Start Accounting - Sche45

Fresh Start Accounting - Schedule of Reorganization Items, net (Detail) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Fresh Start Adjustment [Line Items]
Gain on settlement of liabilities subject to compromise		$ 0
Fresh start valuation adjustments		0
Professional fees		(349)
Other		0
Reorganization items, net		$ (349)
Predecessor [Member]
Fresh Start Adjustment [Line Items]
Gain on settlement of liabilities subject to compromise	$ 758,764			$ 758,764
Fresh start valuation adjustments	(827,120)			(827,120)
Professional fees	(12,239)			(19,824)
Other	(526)			(594)
Reorganization items, net	$ (81,121)		$ 0	$ (88,774)	$ 0

Summary of Significant Accoun46

Summary of Significant Accounting Policies - Summary of Current Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	May 04, 2017	Dec. 31, 2016
Schedule Of Accrued Liabilities [Line Items]
Accrued general and administrative expenses	$ 12,533
Accrued lease operating expense	8,568
Accrued capital expenditures	7,948
Accrued ad valorem tax	2,120
Accrued interest payable	1,612
Asset retirement obligation	941
Other	121
Accrued liabilities	$ 33,843	$ 38,180
Predecessor [Member]
Schedule Of Accrued Liabilities [Line Items]
Accrued general and administrative expenses			$ 3,040
Accrued lease operating expense			10,411
Accrued capital expenditures			1,826
Accrued ad valorem tax			977
Accrued interest payable			46,417
Asset retirement obligation			789
Other			1,775
Accrued liabilities		$ 36,954	$ 65,235

Summary of Significant Accoun47

Summary of Significant Accounting Policies - Summary of Supplemental Cash Flows (Detail) - USD ($) $ in Thousands	2 Months Ended	4 Months Ended	6 Months Ended
	Jun. 30, 2017	May 04, 2017	Jun. 30, 2016
Supplemental cash flows:
Cash paid for interest, net of amounts capitalized	$ 1,752
Cash paid for reorganization items, net	412
Noncash investing and financing activities:
Increase (decrease) in capital expenditures in payables and accrued liabilities	5,288
(Increase) decrease in accounts receivable/payable related to divestitures	0
Asset retirement obligation removal related to divestitures	$ 0
Predecessor [Member]
Supplemental cash flows:
Cash paid for interest, net of amounts capitalized		$ 6,598	$ 57,589
Cash paid for reorganization items, net		11,999	0
Noncash investing and financing activities:
Increase (decrease) in capital expenditures in payables and accrued liabilities		3,173	(1,759)
(Increase) decrease in accounts receivable/payable related to divestitures		0	(856)
Asset retirement obligation removal related to divestitures		$ 0	$ 6,212

Acquisitions and Divestitures -

Acquisitions and Divestitures - Acquisition and Divestiture Related Expenses (Detail) - General and Administrative Expense - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Business Acquisition [Line Items]
Business Acquisition and Divestiture, Related Expenses		$ 0
Predecessor [Member]
Business Acquisition [Line Items]
Business Acquisition and Divestiture, Related Expenses	$ 0		$ 927	$ 0	$ 1,013

Acquisitions and Divestitures49

Acquisitions and Divestitures - Additional Information (Detail) - Disposal Group Not Discontinued Operation [Member] - USD ($) $ in Millions	Jul. 14, 2016	Jun. 14, 2016
Rockies Divestiture [Member]
Business Acquisition And Divestiture [Line Items]
Proceeds from divestitures	$ 16.4
Permian Divestiture [Member]
Business Acquisition And Divestiture [Line Items]
Proceeds from divestitures		$ 36.7

Acquisitions and Divestitures50

Acquisitions and Divestitures - Schedule of Income (Loss) before Income Taxes Including (Gain) Loss on Divestiture (Detail) - Predecessor [Member] - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016
Permian Divestiture [Member]
Business Acquisition And Divestiture [Line Items]
Income (loss) before income taxes	$ 6,855	$ 4,832
Rockies Divestiture [Member]
Business Acquisition And Divestiture [Line Items]
Income (loss) before income taxes	$ (5,860)	$ (7,620)

Fair Value Measurements of Fi51

Fair Value Measurements of Financial Instruments - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value [Member] - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	$ 88,797
Liabilities	10,037
Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		$ 189,851
Liabilities		17,757
Significant Unobservable Inputs (Level 1) [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	0
Liabilities	0
Significant Unobservable Inputs (Level 1) [Member] | Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		0
Liabilities		0
Significant Unobservable Inputs (Level 2) [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	88,797
Liabilities	10,037
Significant Unobservable Inputs (Level 2) [Member] | Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		189,851
Liabilities		17,757
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	0
Liabilities	0
Significant Unobservable Inputs (Level 3) [Member] | Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		0
Liabilities		0
Commodity derivatives [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	88,797
Liabilities	10,037
Commodity derivatives [Member] | Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		189,851
Liabilities		17,757
Commodity derivatives [Member] | Significant Unobservable Inputs (Level 1) [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	0
Liabilities	0
Commodity derivatives [Member] | Significant Unobservable Inputs (Level 1) [Member] | Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		0
Liabilities		0
Commodity derivatives [Member] | Significant Unobservable Inputs (Level 2) [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	88,797
Liabilities	10,037
Commodity derivatives [Member] | Significant Unobservable Inputs (Level 2) [Member] | Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		189,851
Liabilities		17,757
Commodity derivatives [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets	0
Liabilities	$ 0
Commodity derivatives [Member] | Significant Unobservable Inputs (Level 3) [Member] | Predecessor [Member]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Assets		0
Liabilities		$ 0

Fair Value Measurements of Fi52

Fair Value Measurements of Financial Instruments - Additional Information (Detail) - USD ($)	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Assets And Liabilities Carrying Value And Fair Value [Line Items]
Impairment of proved oil and natural gas properties		$ 0
Predecessor [Member]
Assets And Liabilities Carrying Value And Fair Value [Line Items]
Impairment of proved oil and natural gas properties	$ 0		$ 0	$ 0	$ 8,342,000
East Texas [Member] | Predecessor [Member]
Assets And Liabilities Carrying Value And Fair Value [Line Items]
Impairment of proved oil and natural gas properties					8,300,000
Carrying value of properties after impairment charges			$ 11,000,000		$ 11,000,000

Risk Management and Derivativ53

Risk Management and Derivative Instruments - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Jan. 31, 2017	Jun. 30, 2016	Jun. 30, 2017
Derivative Instruments Gain Loss [Line Items]
Conditional rights of set-off under ISDA Master Agreement reduce the maximum amount of loss due to credit risk			$ 78.8
Commodity derivatives [Member]
Derivative Instruments Gain Loss [Line Items]
Cash settlement receipt	$ 94.1	$ 39.3

Risk Management and Derivativ54

Risk Management and Derivative Instruments - Open Commodity Positions (Detail)	6 Months Ended
	Jun. 30, 2017MMBTU$ / MMBTU$ / bblbbl
Natural Gas Derivative Contracts Fixed Price Swap 2017 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) | MMBTU	1,295,000
Weighted-average fixed price | $ / MMBTU	3.96
Crude Oil Derivative Contracts Collar 2017 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) | bbl	10,000
Weighted-average floor price	45
Weighted-average ceiling price	54.50
Crude Oil Derivative Contracts Fixed Price Swap 2017 [Member]
Derivative [Line Items]
Weighted-average fixed price	71.44
Average monthly volume (Bbls) | bbl	129,000
NGL Derivative Contracts Fixed Price Swap 2017 [Member]
Derivative [Line Items]
Weighted-average fixed price	30.29
Average monthly volume (Bbls) | bbl	78,400
Natural Gas Derivative Contracts Fixed Price Swap 2018 [Member]
Derivative [Line Items]
Average monthly volume (MMBtu) | MMBTU	1,102,000
Weighted-average fixed price | $ / MMBTU	3.91
Crude Oil Derivative Contracts Fixed Price Swap 2018 [Member]
Derivative [Line Items]
Weighted-average fixed price	75.69
Average monthly volume (Bbls) | bbl	122,000
Crude Oil Derivative Contracts Collar 2018 [Member]
Derivative [Line Items]
Average monthly volume (Bbls) | bbl	0
Weighted-average floor price	0
Weighted-average ceiling price	0
NGL Derivative Contracts Fixed Price Swap Contracts 2018 [Member]
Derivative [Line Items]
Weighted-average fixed price	24.13
Average monthly volume (Bbls) | bbl	65,700

Risk Management and Derivativ55

Risk Management and Derivative Instruments - Gross Fair Value of Derivative Instruments by Appropriate Balance Sheet (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	May 04, 2017	Dec. 31, 2016
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Net recorded fair value	$ 53,298	$ 51,329
Asset Derivatives, Net recorded fair value	25,462	33,800
Predecessor [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Net recorded fair value		51,329	$ 69,464
Asset Derivatives, Net recorded fair value		$ 33,800	102,630
Short-Term Derivative Instruments [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	63,214
Asset Derivatives, Netting arrangements	(9,916)
Asset Derivatives, Net recorded fair value	53,298
Liability Derivatives, Gross fair value	9,916
Liability Derivatives, Netting arrangements	(9,916)
Liability Derivatives, Net recorded fair value	0
Short-Term Derivative Instruments [Member] | Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	63,214
Liability Derivatives, Gross fair value	9,916
Short-Term Derivative Instruments [Member] | Predecessor [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value			86,335
Asset Derivatives, Netting arrangements			(16,871)
Asset Derivatives, Net recorded fair value			69,464
Liability Derivatives, Gross fair value			16,871
Liability Derivatives, Netting arrangements			(16,871)
Liability Derivatives, Net recorded fair value			0
Short-Term Derivative Instruments [Member] | Predecessor [Member] | Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value			86,335
Liability Derivatives, Gross fair value			16,871
Long-Term Derivative Instruments [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	25,583
Asset Derivatives, Netting arrangements	(121)
Asset Derivatives, Net recorded fair value	25,462
Liability Derivatives, Gross fair value	121
Liability Derivatives, Netting arrangements	(121)
Liability Derivatives, Net recorded fair value	0
Long-Term Derivative Instruments [Member] | Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value	25,583
Liability Derivatives, Gross fair value	$ 121
Long-Term Derivative Instruments [Member] | Predecessor [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value			103,515
Asset Derivatives, Netting arrangements			(885)
Asset Derivatives, Net recorded fair value			102,630
Liability Derivatives, Gross fair value			885
Liability Derivatives, Netting arrangements			(885)
Liability Derivatives, Net recorded fair value			0
Long-Term Derivative Instruments [Member] | Predecessor [Member] | Commodity derivatives [Member]
Derivative Instruments and Hedges, Assets [Abstract]
Asset Derivatives, Gross fair value			103,515
Liability Derivatives, Gross fair value			$ 885

Risk Management and Derivativ56

Risk Management and Derivative Instruments - Unrealized and Realized Gains and Losses Related to Derivative Instruments (Detail) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Derivative Instruments Gain Loss [Line Items]
(Gain) loss on commodity derivative instruments		$ (1,915)
Interest expense, net		(3,797)
Predecessor [Member]
Derivative Instruments Gain Loss [Line Items]
(Gain) loss on commodity derivative instruments	$ (12,835)		$ 124,580	$ (23,076)	$ 72,835
Interest expense, net	(1,843)		(32,143)	(10,243)	(64,695)
Commodity derivatives [Member]
Derivative Instruments Gain Loss [Line Items]
(Gain) loss on commodity derivative instruments		(1,915)
Commodity derivatives [Member] | Predecessor [Member]
Derivative Instruments Gain Loss [Line Items]
(Gain) loss on commodity derivative instruments	(12,835)		124,580	(23,076)	72,835
Interest rate derivatives [Member]
Derivative Instruments Gain Loss [Line Items]
Interest expense, net		$ 0
Interest rate derivatives [Member] | Predecessor [Member]
Derivative Instruments Gain Loss [Line Items]
Interest expense, net	$ 0		$ 1,844	$ 0	$ 5,526

Asset Retirement Obligations -

Asset Retirement Obligations - Summary of Changes in Asset Retirement Obligations (Detail) - USD ($) $ in Thousands		1 Months Ended	2 Months Ended		3 Months Ended	4 Months Ended	6 Months Ended
		May 04, 2017	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016	May 05, 2017	Dec. 31, 2016
Asset Retirement Obligations [Line Items]
Asset retirement obligations at beginning of period			$ 96,127
Liabilities added from acquisitions or drilling			8
Liabilities settled			0
Accretion expense			1,027	$ 1,027
Revision of estimates			69
Asset retirement obligation at end of period			97,231	97,231
Fresh start adjustments	[1]							$ (62,928)
Less: Current Portion			(941)	(941)
Asset retirement obligations - long-term portion		$ 95,186	$ 96,290	96,290		$ 95,186
Predecessor [Member]
Asset Retirement Obligations [Line Items]
Asset retirement obligations at beginning of period				$ 159,055		155,702
Liabilities added from acquisitions or drilling						6
Liabilities settled						(164)
Accretion expense		912			$ 2,712	3,407	$ 5,419
Revision of estimates						104
Asset retirement obligation at end of period		159,055				159,055
Less: Current Portion									$ (789)
Asset retirement obligations - long-term portion		$ 158,114				$ 158,114			$ 154,913
[1]	As a result of the application of fresh start accounting, the Successor recorded its asset retirement obligations at fair value as of the Effective Date.

Debt - Consolidated Debt Obliga

Debt - Consolidated Debt Obligations (Detail) - USD ($) $ in Thousands		Jun. 30, 2017		May 04, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt		$ 418,000
Less: current portion of long-term debt		0	[1]	$ 0
Long-term debt (see Note 9)		418,000		430,000
Predecessor [Member]
Debt Instrument [Line Items]
Total debt					$ 1,622,904
Less: current portion of long-term debt				(454,799)	(1,622,904)	[1]
Long-term debt (see Note 9)				$ 0	0
Successor $1.0 billion Exit Credit Facility, variable-rate, due March 2021
Debt Instrument [Line Items]
Aggregate principal outstanding	[2]	$ 418,000
2021 Senior Notes, fixed-rate, due May 2021 [Member] | Predecessor [Member]
Debt Instrument [Line Items]
Senior Notes, fixed-rate	[3],[4]				646,287
Predecessor $2.0 billion revolving credit facility, variable-rate, due March 2018 [Member] | Predecessor [Member]
Debt Instrument [Line Items]
Aggregate principal outstanding	[2]				511,652
2022 Senior Notes, fixed-rate, due August 2022 [Member] | Predecessor [Member]
Debt Instrument [Line Items]
Senior Notes, fixed-rate	[3],[5]				$ 464,965
[1]	Due to the existing and anticipated financial covenant violations as of December 31, 2016, the borrowings under the Predecessor’s revolving credit facility and the Notes were classified as current at December 31, 2016. There were no existing or anticipated financial covenant violations as of June 30, 2017.
[2]	The carrying amount of our Predecessor’s revolving credit facility and Successor Exit Credit Facility approximates fair value because the interest rates are variable and reflective of market rates.
[3]	The estimated fair value is based on quoted market prices and is classified as Level 2 within the fair value hierarchy.
[4]	The estimated fair value of our 2021 Senior Notes was $314.3 million at December 31, 2016.
[5]	The estimated fair value of our 2022 Senior Notes was $223.2 million at December 31, 2016.

Debt - Consolidated Debt Obli59

Debt - Consolidated Debt Obligations (Parenthetical) (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Successor $1.0 billion Exit Credit Facility, variable-rate, due March 2021
Debt Instrument [Line Items]
Revolving credit facility	$ 1,000,000,000
Maturity date	Mar. 19, 2021
Predecessor $2.0 billion revolving credit facility, variable-rate, due March 2018 [Member]
Debt Instrument [Line Items]
Revolving credit facility	$ 2,000,000,000
Maturity date	Mar. 19, 2018
2021 Senior Notes, fixed-rate, due May 2021 [Member]
Debt Instrument [Line Items]
Maturity date	May 1, 2021
Estimated fair value of fixed-rate debt		$ 314,300,000
2022 Senior Notes, fixed-rate, due August 2022 [Member]
Debt Instrument [Line Items]
Maturity date	Aug. 1, 2022
Estimated fair value of fixed-rate debt		$ 223,200,000

Debt - Credit Facility - Additi

Debt - Credit Facility - Additional Information (Detail) - USD ($)	May 04, 2017	Jun. 30, 2017
Line of Credit Facility [Line Items]
Letters of credit outstanding		$ 2,500,000
Repayment of predecessor’s revolving credit facility		12,000,000
Predecessor $2.0 billion revolving credit facility, variable-rate, due March 2018 [Member]
Line of Credit Facility [Line Items]
Revolving credit facility, maximum borrowing capacity		2,000,000,000
Repayment of predecessor’s revolving credit facility	$ 24,800,000
Exit Credit Facility [Member] | Amplify Energy Operating LLC
Line of Credit Facility [Line Items]
Aggregate principal outstanding	430,000,000
Borrowing base	490,000,000
Amortization of deferred charges	$ 2,500,000
Maturity date	Mar. 19, 2021
Percentage of revolving unused commitment fee	0.50%
Minimum Percentage of Oil and Gas Properties mortgage as collateral security for the obligations	95.00%
Interest coverage ratio maximum	250.00%
Current ratio	100.00%
Total leverage ratio maximum	400.00%
Exit Credit Facility [Member] | Amplify Energy Operating LLC | Minimum | Alternative Base Rate [Member]
Line of Credit Facility [Line Items]
Base rate borrowing percentage	2.00%
Exit Credit Facility [Member] | Amplify Energy Operating LLC | Minimum | LIBOR/Eurodollar [Member]
Line of Credit Facility [Line Items]
Base rate borrowing percentage	3.00%
Exit Credit Facility [Member] | Amplify Energy Operating LLC | Maximum [Member] | Alternative Base Rate [Member]
Line of Credit Facility [Line Items]
Base rate borrowing percentage	3.00%
Exit Credit Facility [Member] | Amplify Energy Operating LLC | Maximum [Member] | LIBOR/Eurodollar [Member]
Line of Credit Facility [Line Items]
Base rate borrowing percentage	4.00%
Successor Exit Credit Facility [Member]
Line of Credit Facility [Line Items]
Borrowing base		487,500,000
Unamortized deferred financing costs		$ 8,400,000

Debt - Senior Notes - Additiona

Debt - Senior Notes - Additional Information (Detail) - USD ($) $ in Thousands	May 04, 2017	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	May 04, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Repurchase of senior notes			$ 0
Gain on extinguishment of debt			$ 0
Senior Notes [Member]
Debt Instrument [Line Items]
Unrecorded contractual interest		$ 7,500			$ 24,200
Noteholder Plan Support Agreement [Member]
Debt Instrument [Line Items]
Unsecured noteholders to receive pro rata share of cash distribution	$ 24,600
Predecessor [Member]
Debt Instrument [Line Items]
Repurchase of senior notes				$ 40,500		$ 0	$ 40,470
Gain on extinguishment of debt		$ 0		41,664		$ 0	41,664
Predecessor [Member] | 2021 Senior Notes [Member]
Debt Instrument [Line Items]
Repurchase of debt				52,200			52,200
Predecessor [Member] | 2022 Senior Notes [Member]
Debt Instrument [Line Items]
Repurchase of debt				$ 32,000			$ 32,000

Debt - Summary of Weighted-Aver

Debt - Summary of Weighted-Average Interest Rates Paid Excluding Commitment Fees on Variable-Rate Debt Obligations (Detail)	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Successor Exit Credit Facility [Member]
Debt Instrument [Line Items]
Revolving credit facility, weighted-average interest rates		4.91%
Predecessor's Revolving Credit Facility [Member] | Predecessor [Member]
Debt Instrument [Line Items]
Revolving credit facility, weighted-average interest rates	3.80%		3.30%	4.04%	2.85%

Equity and Distributions - Addi

Equity and Distributions - Additional Information (Detail) - USD ($)	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016	May 05, 2017	Dec. 31, 2016	May 25, 2016
Equity and Distributions [Line Items]
Stock issued during period	25,000,000	0
Percentage of new common shares issued to predecessor	2.00%			2.00%
Aggregate cash amount to predecessor	$ 1,300,000
Common stock, shares issued	25,000,000	25,000,000		25,000,000			0
Common stock, shares outstanding	25,000,000	25,000,000		25,000,000		25,000,000
Proceeds from sale of common units, net		$ 0
Predecessor [Member]
Equity and Distributions [Line Items]
Proceeds from sale of common units, net				$ 0	$ 1,703,000
Predecessor [Member] | Limited Partners Common Units [Member]
Equity and Distributions [Line Items]
Common unit, issued			822,313		822,313
Predecessor [Member] | ATM Program [Member]
Equity and Distributions [Line Items]
Authorized Value								$ 60,000,000
Proceeds from sale of common units, net			$ 1,600,000		$ 1,600,000
Fees on sale of common unit			$ 100,000		$ 100,000
Common Stock [Member]
Equity and Distributions [Line Items]
Stock issued during period	25,000,000
Warrants [Member]
Equity and Distributions [Line Items]
Warrant issued during period	2,173,913			2,173,913
Warrant life period	5 years
Percentage of common shares to be issued upon exercise of warrants	8.00%			8.00%
Warrant exercise price	$ 42.60			$ 42.60

Equity and Distributions - Summ

Equity and Distributions - Summary of Changes in Number of Outstanding Common Units and Shares of Common Stock (Detail) - shares		May 04, 2017	Jun. 30, 2017	Jun. 30, 2017	May 04, 2017
Summary of Changes in Number of Outstanding Units/Shares [Line Item]
Beginning balance			25,000,000	25,000,000
Stock issued during period		25,000,000		0
Ending balance		25,000,000	25,000,000	25,000,000	25,000,000
Limited Partners Common Units [Member] | Predecessor [Member]
Summary of Changes in Number of Outstanding Units/Shares [Line Item]
Beginning balance				0	83,827,920
Restricted common units issued					0
Restricted common units/shares forfeited					(12,952)
Restricted common units/shares repurchased	[1]				(14,681)
Ending balance before cancellation		83,800,287			83,800,287
Cancellation of Predecessor common units					(83,800,287)
Ending balance		0			0
[1]	Restricted common units are generally net-settled by unitholders to cover the required withholding tax upon vesting. Unitholders surrendered units with value equivalent to the employees’ minimum statutory obligation for the applicable income and other employment taxes. Total payments remitted for the employees’ tax obligations to the appropriate taxing authorities were less than approximately $0.1 million for the period from January 1, 2017 through May 4, 2017. The net-settlement had the effect of unit repurchase by the Company as they reduced the number of units that would have otherwise been outstanding as a result of the vesting and did not represent an expense to the Company.

Equity and Distributions - Su65

Equity and Distributions - Summary of Changes in Number of Outstanding Common Units and Shares of Common Stock (Parenthetical) (Detail) $ in Millions	4 Months Ended
	May 04, 2017USD ($)
Limited Partners Common Units [Member] | Predecessor [Member] | Maximum [Member]
Summary of Changes in Number of Outstanding Units/Shares [Line Item]
Withholding tax withheld and paid related to vesting of restricted common units	$ 0.1

Equity and Distributions - Su66

Equity and Distributions - Summary of Assumptions used to Estimate the Fair Value (Detail) - Warrants [Member]	2 Months Ended
	Jun. 30, 2017$ / shares
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]
Risk-free interest rate	2.06%
Dividend yield	0.00%
Expected life (in years)	5 years
Expected volatility	50.00%
Strike Price	$ 42.60
Calculated fair value	$ 2.20

Equity and Distributions - Su67

Equity and Distributions - Summary of Quarterly Cash Distribution Rates and Amounts (Detail) - Predecessor [Member] - USD ($)	3 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Limited Partners Capital Account [Line Items]
Distribution made to member or limited partner, date of declaration	Jul. 26, 2016	Apr. 26, 2016	Jan. 26, 2016
Distribution made to member or limited partner, date of record	Aug. 5, 2016	May 6, 2016	Feb. 5, 2016
Distribution made to member or limited partner, date of distribution	Aug. 12, 2016	May 13, 2016	Feb. 12, 2016
Distribution per unit	$ 0.0300	$ 0.0300	$ 0.1000
Aggregate Distribution	$ 2,500,000	$ 2,500,000	$ 8,300,000
Maximum [Member]
Limited Partners Capital Account [Line Items]
Distribution Received by Affiliates	$ 100,000	$ 100,000	$ 100,000

Earnings Per Share_Unit - Calcu

Earnings Per Share/Unit - Calculation of Earnings (Loss) Per Share/Unit (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Earnings Per Share/Unit [Line Items]
Net income (loss) attributable to Successor/Predecessor		$ (906)
Less: predecessor's general partner's 0.1% interest in net income (loss)		0
Net (income) allocated to participating restricted stockholders		0
Net income (loss) available to common stockholders/limited partners		$ (906)
Common shares/units:
Common shares/units outstanding — basic		25,000
Dilutive effect of potential common shares/units		0
Common shares/units outstanding — diluted		25,000
Net earnings per share/unit:
Basic		$ (0.04)
Diluted		$ (0.04)
Stock Options [Member]
Net earnings per share/unit:
Antidilutive stock options or warrants		516
Warrants [Member]
Net earnings per share/unit:
Antidilutive stock options or warrants		2,174
Predecessor [Member]
Earnings Per Share/Unit [Line Items]
Net income (loss) attributable to Successor/Predecessor	$ (74,578)		$ (147,550)	$ (90,955)	$ (185,647)
Less: predecessor's general partner's 0.1% interest in net income (loss)			(128)		(168)
Net (income) allocated to participating restricted stockholders	0		0	0	0
Net income (loss) available to common stockholders/limited partners	$ (74,578)		$ (147,422)	$ (90,955)	$ (185,479)
Common shares/units:
Common shares/units outstanding — basic	83,800		83,007	83,807	82,971
Dilutive effect of potential common shares/units	0		0	0	0
Common shares/units outstanding — diluted	83,800		83,007	83,807	82,971
Net earnings per share/unit:
Basic	$ (0.89)		$ (1.78)	$ (1.09)	$ (2.24)
Diluted	$ (0.89)		$ (1.78)	$ (1.09)	$ (2.24)
Predecessor [Member] | Stock Options [Member]
Net earnings per share/unit:
Antidilutive stock options or warrants	0		0	0	0
Predecessor [Member] | Warrants [Member]
Net earnings per share/unit:
Antidilutive stock options or warrants	0		0	0	0

Earnings Per Share_Unit - Cal69

Earnings Per Share/Unit - Calculation of Earnings (Loss) Per Share/Unit (Parenthetical) (Detail)	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share/Unit [Line Items]
General partner's interest in net income, percentage		0.10%
Average [Member] | Predecessor [Member]
Earnings Per Share/Unit [Line Items]
General partner's interest in net income, percentage	0.105%		0.105%

Long-Term Incentive Plans - Add

Long-Term Incentive Plans - Additional Information (Detail)	May 04, 2017shares	May 01, 2017USD ($)	Jun. 01, 2016USD ($)	Mar. 09, 2016USD ($)	Jun. 30, 2016USD ($)	Jan. 31, 2016USD ($)	Jun. 30, 2017USD ($)shares	May 04, 2017USD ($)shares	Jun. 30, 2017USD ($)Installment	Jun. 30, 2016USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of vesting annually equal installments | Installment									3
Vesting date description									The Emergence Awards will generally vest annually in three equal installments on each of the first three anniversaries of the Effective Date, subject to the grantee’s continued employment through each such vesting date.
Share/unit-based compensation (see Note 12)							$ 526,000
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost							$ 8,600,000		$ 8,600,000
Weighted-average period of unrecognized compensation cost									2 years 10 months 25 days
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, granted | shares							0
Weighted-average period of unrecognized compensation cost									2 years 10 months 25 days
Unrecognized compensation cost							$ 2,400,000		$ 2,400,000
Predecessor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share/unit-based compensation (see Note 12)								$ 3,667,000		$ 5,299,000
Reversed share based compensation				$ 500,000
Fair value of compensation cost recognized on the date of plan modification				$ 300,000
Predecessor [Member] | MEMP GP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Reversed share based compensation			$ 100,000
Fair value of compensation cost recognized on the date of plan modification			$ 500,000
Predecessor [Member] | Phantom Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock units, granted | shares								0
Predecessor [Member] | Phantom Units [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Phantom units settled in cash					$ 100,000
Non-Employee Directors [Member] | Predecessor [Member] | Phantom Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period date									2017-01
Non-Employee Directors [Member] | Predecessor [Member] | First Anniversary Of Grant Date [Member] | Phantom Units [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Phantom units settled in cash						$ 100,000
Certain Employee [Member] | Predecessor [Member] | First Anniversary Of Grant Date [Member] | Phantom Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage from the date of grant					33.33%
Certain Employee [Member] | Predecessor [Member] | Second Anniversary Of Grant Date [Member] | Phantom Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage from the date of grant					33.33%
Certain Employee [Member] | Predecessor [Member] | Third Anniversary Of Grant Date [Member] | Phantom Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting percentage from the date of grant					33.33%
Management Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate shares of common stock reserved for issuance | shares	2,322,404							2,322,404
Stock options, granted | shares	614,754
Restricted stock units, granted | shares	614,754
Long Term Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share/unit-based compensation (see Note 12)		$ 2,300,000

Long-Term Incentive Plans - Sum

Long-Term Incentive Plans - Summary of Information Regarding Restricted Stock Unit Awards (Detail) - Restricted Stock Units [Member]	2 Months Ended
	Jun. 30, 2017$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance | shares	614,754
Granted, Number of Units | shares	143,341
Forfeited, Number of Units | shares	(99,232)
Vested, Number of Units | shares	0
Outstanding, Number of Units, Ending Balance | shares	658,863
Outstanding, Weighted Average Grant Date Fair Value per unit, Beginning balance | $ / shares	$ 13.77
Granted, Weighted-Average Grant Date Fair Value per Unit | $ / shares	13.77
Forfeited, Weighted-Average Grant Date Fair Value per Unit | $ / shares	13.77
Vested, Weighted-Average Grant Date Fair Value per Unit | $ / shares	0
Outstanding, Weighted Average Grant Date Fair Value per unit, Ending balance | $ / shares	$ 13.77

Long-Term Incentive Plans - S72

Long-Term Incentive Plans - Summary of Fair Value Assumptions (Detail) - Stock Options [Member]	2 Months Ended
	Jun. 30, 2017$ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	2.06%
Dividend yield	0.00%
Expected life (in years)	6 years
Expected volatility	50.00%
Strike Price	$ 21.58
Calculated fair value per stock option	$ 5.01

Long-Term Incentive Plans - S73

Long-Term Incentive Plans - Summary of Stock Option Awards (Detail) - Stock Options [Member]	2 Months Ended
	Jun. 30, 2017$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance | shares	614,754
Granted, Number of Units | shares	0
Forfeited, Number of Units | shares	(99,232)
Vested, Number of Units | shares	0
Outstanding, Number of Units, Ending Balance | shares	515,522
Outstanding, Weighted Average Grant Date Fair Value per unit, Beginning balance | $ / shares	$ 5.01
Granted, Weighted-Average Grant Date Fair Value per Unit | $ / shares	0
Forfeited, Weighted-Average Grant Date Fair Value per Unit | $ / shares	5.01
Vested, Weighted-Average Grant Date Fair Value per Unit | $ / shares	0
Outstanding, Weighted Average Grant Date Fair Value per unit, Ending balance | $ / shares	$ 5.01

Long-Term Incentive Plans - S74

Long-Term Incentive Plans - Summary of Information Regarding Restricted Common Unit Awards (Detail) - Restricted Common Units [Member] - Predecessor [Member] - $ / shares	4 Months Ended
	May 04, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance	432,160
Granted, Number of Units	0
Forfeited, Number of Units	(12,952)
Vested, Number of Units	(43,045)
Cancellation of Predecessor common units	(376,163)
Outstanding, Number of Units, Ending Balance	0
Outstanding, Weighted Average Grant Date Fair Value per unit, Beginning balance	$ 15
Granted, Weighted-Average Grant Date Fair Value per Unit	0
Forfeited, Weighted-Average Grant Date Fair Value per Unit	9.51
Vested, Weighted-Average Grant Date Fair Value per Unit	10.40
Cancelled	15.72
Outstanding, Weighted Average Grant Date Fair Value per unit, Before cancellation of non-vested shares	$ 0

Long-Term Incentive Plans - S75

Long-Term Incentive Plans - Summary of Information Regarding Predecessor's Phantom Unit Awards (Detail) - Phantom Units [Member] - shares	2 Months Ended	4 Months Ended
	Jun. 30, 2017	May 04, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Ending Balance	0
Cancelled	0
Predecessor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Number of Units, Beginning Balance	5,692,745	5,980,693
Restricted stock units, granted		0
Forfeited, Number of Units		(132,347)
Vested, Number of Units		(155,601)
Outstanding, Number of Units, Ending Balance		5,692,745
Cancelled	(5,692,745)

Long-Term Incentive Plans - S76

Long-Term Incentive Plans - Summary of Amount of Compensation Expense Recognized (Detail) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2016
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)		$ 527
Predecessor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)	$ 2,542		$ 2,731	$ 3,667	$ 5,299
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)		426
Restricted Stock Units [Member] | Predecessor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)	0		0	0	0
Restricted Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)		101
Restricted Stock Options [Member] | Predecessor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)	0		0	0	0
Restricted Common Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)		0
Restricted Common Units [Member] | Predecessor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)	2,644		2,507	3,713	4,999
Phantom Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)		$ 0
Phantom Units [Member] | Predecessor [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity based compensation expense (benefit)	$ (102)		$ 224	$ (46)	$ 300

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($)	Jun. 01, 2016	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	May 04, 2017	Jun. 30, 2017	Jun. 30, 2016	Apr. 27, 2016
Related Party Transaction [Line Items]
General and administrative expense			$ 7,382,000
Transition Services Agreement [Member]
Related Party Transaction [Line Items]
Transition service agreement cost			$ 0		$ 0
General and administrative expense				$ 500,000
Natural Gas Partners [Member] | Incentive Distribution Rights ("IDRs") [Member]
Related Party Transaction [Line Items]
Agreed ownership interest percentage to acquire								50.00%
Predecessor [Member]
Related Party Transaction [Line Items]
General and administrative expense		$ 8,236,000		$ 15,246,000	$ 31,606,000		$ 28,770,000
Predecessor [Member] | Multi-Shot, LLC [Member] | Maximum [Member]
Related Party Transaction [Line Items]
Drilling and completion expenses							$ 100,000
Predecessor [Member] | MEMP GP [Member]
Related Party Transaction [Line Items]
Common Control Acquisition Purchase Price	$ 800,000
Gain (loss) on acquisition	$ 0
Date of acquisition common control						Jun. 1, 2016
Partnership ownership percentage	0.10%
Related party transaction, description of transaction						In connection with the closing of the transaction, our Predecessor’s partnership agreement was amended and restated to, among other things, (i) convert MEMP GP’s 0.1% general partnership interest into a non-economic general partner interest, (ii) cancel the IDRs, and (iii) provide that the limited partners of our Predecessor had the ability to elect the members of MEMP GP’s board of directors. On June 1, 2016, our Predecessor also acquired the remaining 50% of the IDRs of MEMP owned by an NGP affiliate.
Predecessor [Member] | Natural Gas Partners [Member] | Incentive Distribution Rights ("IDRs") [Member]
Related Party Transaction [Line Items]
Date of acquisition common control						Jun. 1, 2016
Agreed ownership interest percentage to acquire	50.00%

Related Party Transactions - Sc

Related Party Transactions - Schedule of Amount of General and Administrative Costs and Expenses Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2016
Predecessor [Member] | Omnibus Agreement [Member]
Related Party Transaction [Line Items]
General and administrative costs and expenses under omnibus agreement	$ 4,418	$ 11,867

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Jun. 30, 2017	Dec. 31, 2016
Commitments And Contingencies Additional Textual [Abstract]
Remaining environmental accrued liability recorded	$ 0	$ 0
U S Bank Money Market [Member]
Commitments And Contingencies Additional Textual [Abstract]
Held-to-maturity investment, amortized cost	152,100,000
Minimum [Member]
Commitments And Contingencies Additional Textual [Abstract]
Minimum balances attributable to REO's net working interest	$ 152,000,000	$ 152,000,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	2 Months Ended	4 Months Ended	6 Months Ended
	Jun. 30, 2017	May 04, 2017	Jun. 30, 2016
Income Tax Disclosure [Abstract]
Income tax expense/(benefit)	$ (592)	$ (100)	$ 200
Effective tax rate	39.50%	0.10%	(0.10%)
Deferred tax benefit	$ 200