10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

_______________________________________

FORM 10-Q

_______________________________________

(Mark One)

x   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended: September 30, 2018

OR

¨   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from            to

Commission file number: 333-173751

_______________________________________

ALTA MESA HOLDINGS, LP

(Exact name of registrant as specified in its charter)

_______________________________________

Texas	20-3565150
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
15021 Katy Freeway, Suite 400, Houston, Texas	77094
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: 281-530-0991

_______________________________________

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ¨    No  x

(Explanatory Note: The registrant is a voluntary filer and is not subject to the filing requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934.   However, the registrant has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months, or for such shorter period that the registrant would have been required to file such reports, as if it were subject to such filing requirements.)

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files.)    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See definition of “large accelerated filer”, “accelerated filer”, “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act. (Check one)

Large accelerated filer	¨	Accelerated filer	¨	Non-accelerated filer	x
Smaller reporting company	¨	Emerging growth company	x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

Table of Contents

໿

	Page Number
Glossary of Terms	3
Cautionary Statement Regarding Forward-Looking Statements	4
PART I — FINANCIAL INFORMATION
Item 1. Financial Statements (unaudited)
Condensed Consolidated Balance Sheets	6
Condensed Consolidated Statements of Operations	8
Condensed Consolidated Statements of Changes in Partners’ Capital	9
Condensed Consolidated Statements of Cash Flows	10
Notes to Condensed Consolidated Financial Statements	11
Note 1 — Description of Business	11
Note 2 — Summary of Significant Accounting Policies	11
Note 3 — Supplemental Cash Flow Information	15
Note 4 — Accounts Receivable	15
Note 5 — Business Combination	15
Note 6 — Property and Equipment	19
Note 7 — Discontinued Operations (Predecessor)	19
Note 8 — Fair Value Measurements	21
Note 9 — Derivative Financial Instruments	23
Note 10 — Asset Retirement Obligations	26
Note 11 — Long-Term Debt, Net	27
Note 12 — Accounts Payable and Accrued Liabilities	29
Note 13 — Commitments and Contingencies	29
Note 14 — Significant Risks and Uncertainties	30
Note 15 — Partners' Capital	30
Note 16 — Equity-based Compensation (Successor)	30
Note 17 — Related Party Transactions	32
Note 18 — Subsidiary Guarantors	32
Note 19 — Subsequent Events	32
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	33
Item 3. Quantitative and Qualitative Disclosures about Market Risk	46
Item 4. Controls and Procedures	46
PART II — OTHER INFORMATION
Item 1. Legal Proceedings	46
Item 1A. Risk Factors	46
Item 5. Other Information	46
Item 6. Exhibits	47
Signatures	48

2

Glossary of Terms

Certain terms and abbreviations used in this Quarterly Report on Form 10-Q are defined as follows:

bbl -	Barrels
bbl/d -	Barrels per day
BOE -	Barrels of oil equivalent
Btu -	British thermal units
Completion -	The installation of permanent equipment for the production of oil and gas
EBITDAX -	Earnings before interest, taxes, depreciation, depletion, amortization and exploration expenses
Mbbls -	One thousand barrels
Mbbls/d -	One thousand barrels per day
MBoe/d -	One thousand barrels of oil equivalent per day
Mcf -	One thousand cubic feet
Mcf/d -	One thousand cubic feet per day
MMBtu -	One million British thermal units
MMcf -	One million cubic feet
MMcf/d -	One million cubic feet per day
NYMEX -	New York Mercantile Exchange
NGLs -	Natural gas liquids are a group of hydrocarbons including ethane, propane, normal butane, isobutane and natural gasoline
VWAP -	Volume weighted average price
Wellbore -	A hole that is drilled to aid in the exploration and recovery of natural resources including oil or natural gas
Working interest -	An interest in a mineral property that entitles the owner of that interest to all of the share of the mineral production from the property, usually subject to a royalty

3

Cautionary Statement Regarding Forward-Looking Statements

The information in this report includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”).  All statements, other than statements of historical fact included in this Quarterly Report on Form 10-Q, regarding our strategy, future operations, financial position, estimated revenues and losses, projected costs, prospects, plans and objectives of management are forward-looking statements. When used in this report, the words “could”, “should”, “will”, “plan”, “believe”, “anticipate”, “intend”, “estimate”, “expect”, “project”, the negative of such terms and other similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words. These forward-looking statements are based on our current expectations and assumptions about future events and are based on currently available information as to the outcome and timing of future events. When considering forward-looking statements, you should keep in mind the risk factors and other cautionary statements described under the heading “Risk Factors” included in our 2017 Annual Report on Form 10-K and Part II, Item 1A of this report. These forward-looking statements reflect management’s current belief, based on currently available information, as to the outcome and timing of future events.

Forward-looking statements may include statements about:

• the benefits of the Business Combination, as defined in Note 5 of the accompanying Notes to Condensed Consolidated Financial Statements;

• the future financial performance of the combined company following the Business Combination;

• our business strategy;

• our reserve quantities and the present value of our reserves;

• our estimated purchase price and purchase price allocations;

• our exploration and drilling prospects, inventories, projects and programs;

• our horizontal drilling, completion and production technology;

• our ability to replace the reserves we produce through drilling and property acquisitions;

• our financial strategy, liquidity and capital required for our development program;

• future oil and natural gas prices;

• the supply and demand for crude oil, natural gas, and natural gas liquids;

• the timing and amount of future production of oil and natural gas;

• our hedging strategy and results;

• the drilling and completion of wells, including statements about future horizontal drilling plans;

• competition and government regulation;

• our ability to obtain permits and governmental approvals;

• changes in the Oklahoma forced pooling system;

• pending legal and environmental matters;

• our future drilling plans;

• our marketing of oil, natural gas and natural gas liquids;

• our leasehold or business acquisitions;

• our costs of developing our oil and gas properties;

• our liquidity and access to capital;

• our ability to hire, train or retain qualified personnel;

• general economic conditions;

• our future operating results, including initial production values and liquid yields in our type curve areas;

• the costs, terms and availability of gathering, processing, fractionation and other midstream services; and

• our plans, objectives, expectations and intentions contained in this report that are not historical.

We caution you that these forward-looking statements are subject to all of the risks and uncertainties, most of which are difficult to predict and many of which are beyond our control, incident to the exploration for and development, production, gathering and sale of oil, natural gas and natural gas liquids. These risks include, but are not limited to, commodity price volatility, low prices for oil, natural gas and/or natural gas liquids, global economic conditions, inflation, increased operating costs, lack of availability of drilling and production equipment, supplies, services and qualified personnel, uncertainties related to new technologies, geographical concentration of our operations, environmental risks, weather risks, security risks, drilling and other operating risks, regulatory changes, the uncertainty inherent in estimating oil and natural gas reserves and in projecting future rates of production, reductions in cash flow, lack of access to capital, our ability to satisfy future cash obligations, restrictions in our debt agreements, the timing of development expenditures, managing our growth and integration of acquisitions, failure to realize expected value creation from property acquisitions, title defects, limited control over non-operated properties and the other risks described under “Item 1A. Risk Factors” in our 2017 Annual Report on Form 10-K and in this report.

4

Reserve engineering is a process of estimating underground accumulations of oil and natural gas that cannot be measured in an exact way. The accuracy of any reserve estimate depends on the quality of available data, the interpretation of such data and price and cost assumptions made by reservoir engineers.  Specifically, future prices received for production and costs may vary, perhaps significantly, from the prices and costs assumed for purposes of these estimates.  In addition, the results of drilling, testing and production activities may justify revisions of estimates that were made previously. If significant, such revisions would change the schedule of any further production and development drilling. Accordingly, reserve estimates may differ significantly from the quantities of oil and natural gas that are ultimately recovered.

Should one or more of the risks or uncertainties described in the 2017 Annual Report on Form 10-K or this report occur, or should underlying assumptions prove incorrect, our actual results and plans could differ materially from those expressed in any forward-looking statements.

Except as otherwise required by applicable law, we disclaim any duty to update any forward-looking statements, all of which are expressly qualified by the statements in this section, to reflect events or circumstances occurring after the date of this Quarterly Report on Form 10-Q.

5

PART I — FINANCIAL INFORMATION

ITEM 1. Financial Statements

ALTA MESA HOLDINGS, LP AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited)

(in thousands) 

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
ASSETS
CURRENT ASSETS
Cash and cash equivalents	$	8,869	$	3,660
Restricted cash	872		1,269
Accounts receivable, net	107,984		76,161
Other receivables	246		1,388
Receivables due from affiliate	16,656		—
Receivables due from related party	13,085		790
Note receivable due from related party	1,642		—
Prepaid expenses and other current assets	3,423		2,932
Current assets — discontinued operations	—		5,195
Derivative financial instruments	—		216
Total current assets	152,777		91,611
PROPERTY AND EQUIPMENT
Oil and natural gas properties, successful efforts method, net	2,697,757		894,630
Other property and equipment, net	93,956		32,140
Total property and equipment, net	2,791,713		926,770
OTHER ASSETS
Deferred financing costs, net	1,216		1,787
Notes receivable due from related party	11,492		12,369
Deposits and other long-term assets	86		9,067
Non-current assets — discontinued operations	—		43,785
Derivative financial instruments	—		8
Total other assets	12,794		67,016
TOTAL ASSETS	$	2,957,284	$	1,085,397

The accompanying notes are an integral part of these condensed consolidated financial statements.

6

	Successor		Predecessor
	September 30, 2018		December 31, 2017
LIABILITIES AND PARTNERS’ CAPITAL
CURRENT LIABILITIES
Accounts payable and accrued liabilities	$	227,139	$	170,489
Accounts payable — affiliate	481		5,476
Advances from non-operators	9,233		5,502
Advances from related party	16,917		23,390
Asset retirement obligations	1,300		69
Current liabilities — discontinued operations	—		15,419
Derivative financial instruments	34,396		19,303
Total current liabilities	289,466		239,648
LONG-TERM LIABILITIES
Asset retirement obligations, net of current portion	9,169		10,400
Long-term debt, net	610,354		607,440
Noncurrent liabilities — discontinued operations	—		66,862
Derivative financial instruments	7,078		1,114
Other long-term liabilities	5		5,488
Total long-term liabilities	626,606		691,304
TOTAL LIABILITIES	916,072		930,952
Commitments and Contingencies (Note 13)
PARTNERS’ CAPITAL	2,041,212		154,445
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	$	2,957,284	$	1,085,397

The accompanying notes are an integral part of these condensed consolidated financial statements.

7

ALTA MESA HOLDINGS, LP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited)

(in thousands)

໿

	Successor			Predecessor			Successor			Predecessor
	Three			Three			February 9, 2018			January 1, 2018				Nine
	Months Ended			Months Ended			Through			Through				Months Ended
	September 30, 2018			September 30, 2017			September 30, 2018			February 8, 2018				September 30, 2017
OPERATING REVENUES AND OTHER
Oil	$	107,253		$	44,201		$	222,822		$	30,972			$	133,489
Natural gas	11,959			9,583			25,149			4,276				29,816
Natural gas liquids	13,880			7,548			28,835			4,000				21,201
Other revenues	1,011			1,792			3,795			888				5,005
Total operating revenues	134,103			63,124			280,601			40,136				189,511
Gain (loss) on sale of assets and other	(18		)	—			5,898			—				—
Gain on acquisition of oil and gas properties	—			5,267			—			—				5,267
Gain (loss) on derivative contracts	(11,212		)	(10,468		)	(63,077		)	7,298				38,024
Total operating revenues and other	122,873			57,923			223,422			47,434				232,802
OPERATING EXPENSES
Lease operating expense	16,351			10,407			37,347			4,485				32,897
Marketing and transportation expense	15,820			8,314			32,608			3,725				20,486
Production taxes	6,311			1,262			10,332			953				3,712
Workover expense	1,065			1,441			2,643			423				3,131
Exploration expense	1,029			3,649			14,067			3,633				11,888
Depreciation, depletion and amortization expense	45,623			24,159			83,068			11,784				63,247
Impairment expense	—			—			—			—				1,188
Accretion expense	226			108			489			39				234
General and administrative expense	7,918			17,445			57,188			24,352				35,474
Total operating expenses	94,343			66,785			237,742			49,394				172,257
INCOME (LOSS) FROM OPERATIONS	28,530			(8,862		)	(14,320		)	(1,960		)		60,545
OTHER INCOME (EXPENSE)
Interest expense	(11,008		)	(13,545		)	(26,565		)	(5,511		)		(38,165		)
Interest income and other	322			244			1,688			172				792
Total other income (expense), net	(10,686		)	(13,301		)	(24,877		)	(5,339		)	—	(37,373		)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE STATE INCOME TAXES	17,844			(22,163		)	(39,197		)	(7,299		)		23,172
Provision for state income taxes	—			—			7			—				285
INCOME (LOSS) FROM CONTINUING OPERATIONS	17,844			(22,163		)	(39,204		)	(7,299		)		22,887
Loss from discontinued operations, net of state income tax	—			(2,041		)	—			(7,593		)		(37,490		)
NET INCOME (LOSS)	$	17,844		$	(24,204	)	$	(39,204	)	$	(14,892	)		$	(14,603	)

The accompanying notes are an integral part of these condensed consolidated financial statements.

8

ALTA MESA HOLDINGS, LP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN PARTNERS’ CAPITAL (Unaudited)

(in thousands)

໿

	Successor						Predecessor
	Three Months Ended September 30, 2018			February 9, 2018 Through September 30, 2018			Three Months Ended September 30, 2017			January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Beginning balance	$	2,048,043		$	1,535,891		$	41,707		$	154,445		$	32,106
Distribution of non-stack (assets) net liability	—			—			—			33,102			—
Capital contributions	—			560,344			200,000			—			200,000
Distributions	(25,000		)	(32,000		)	—			—			—
Issuance of additional Alta Mesa purchase consideration	—			9,467			—			—			—
Equity-based compensation expense	325			6,714			—			—			—
Net income (loss)	17,844			(39,204		)	(24,204		)	(14,892		)	(14,603		)
Ending balance	$	2,041,212		$	2,041,212		$	217,503		$	172,655		$	217,503

The accompanying notes are an integral part of these condensed consolidated financial statements.

9

ALTA MESA HOLDINGS, LP AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited)

(in thousands)

໿

	Successor			Predecessor
	February 9, 2018			January 1, 2018			Nine
	Through			Through			Months Ended
	September 30, 2018			February 8, 2018			September 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$	(39,204	)	$	(14,892	)	$	(14,603	)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization expense	83,068			12,414			80,082
Impairment expense	—			5,560			29,206
Accretion expense	489			140			1,447
Amortization of deferred financing costs	151			171			2,205
Amortization of debt premium	(3,281		)	—			—
Equity-based compensation expense	6,714			—			—
Dry hole expense	—			(45		)	2,447
Expired leases	10,658			1,250			8,394
(Gain) loss on derivative contracts	63,077			(7,298		)	(38,024		)
Cash settlements of derivative contracts	(32,836		)	(1,661		)	1,775
Premium paid on derivative contracts	—			—			(520		)
Interest converted into debt	—			103			904
Interest added to notes receivable due from related party	(680		)	(85		)	(619		)
Loss on sale of assets and other	81			1,923			—
Gain on acquisition of oil and gas properties	—			—			(6,893		)
Impact on cash from changes in assets and liabilities:
Accounts receivable	(5,715		)	(20,895		)	(33,649		)
Other receivables	976			(9,887		)	7,382
Receivables due from affiliate	(16,656		)	—			—
Receivables due from related party	(12,178		)	(117		)	169
Prepaid expenses and other current and non-current assets	8,181			9,970			(9,938		)
Advances from related party	(30,589		)	24,116			5,266
Settlement of asset retirement obligations	(1,249		)	(63		)	(6,083		)
Accounts payable — related party	(4,994		)	—			—
Accounts payable, accrued liabilities and other liabilities	(10,531		)	25,815			27,308
NET CASH PROVIDED BY OPERATING ACTIVITIES	15,482			26,519			56,256
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures for property and equipment	(489,009		)	(38,096		)	(244,308		)
Acquisitions	—			—			(55,236		)
Proceeds from sale of assets and other, net	11			—			—
Notes receivable due from affiliate	—			—			(1,515		)
NET CASH USED IN INVESTING ACTIVITIES	(488,998		)	(38,096		)	(301,059		)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuances of long-term debt	80,000			60,000			286,065
Repayments of long-term debt	(134,065		)	(43,000		)	(251,622		)
Additions to deferred financing costs	(1,367		)	—			(220		)
Capital distributions	(32,000		)	(68		)	—
Capital contributions	560,344			—			207,875
NET CASH PROVIDED BY FINANCING ACTIVITIES	472,912			16,932			242,098
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	(604		)	5,355			(2,705		)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	10,345			4,990			7,618
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	$	9,741		$	10,345		$	4,913

The accompanying notes are an integral part of these condensed consolidated financial statements.

10

ALTA MESA HOLDINGS, LP AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

NOTE 1 — DESCRIPTION OF BUSINESS

Alta Mesa Holdings, LP, together with its subsidiaries (“we,” “us,” “our,” the “Company,” and “Alta Mesa”), is an exploration and production company focused on the acquisition, development, exploration and exploitation of unconventional onshore oil and natural gas reserves in the eastern portion of the Anadarko Basin in Oklahoma. Our activities are primarily directed at the horizontal development of an oil and liquids-rich resource play in an area of the basin commonly referred to as the Sooner Trend Anadarko Basin Canadian and Kingfisher County (“STACK”). 

As described further in Note 5 — Business Combination, certain transactions were consummated on February 9, 2018 that resulted in our acquisition by Alta Mesa Resources, Inc. (“AMR”). These transactions are referred to as the “Business Combination”. AMR is a publicly traded corporation that is not under the control of any person. Prior to the closing of the Business Combination, we were controlled by High Mesa Inc. (“High Mesa”) and indirectly by our founder and Chief Operating Officer, Michael E. Ellis.

In connection with the closing of the Business Combination, we distributed our non-STACK assets and liabilities to High Mesa Holdings, LP (the “AM Contributor”) and completed our transition from a diversified asset base composed of a portfolio of conventional assets to an oil and liquids-rich resource play in the STACK.  

NOTE 2 — SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

We have provided a discussion of significant accounting policies in Note 2 in our Annual Report on Form 10-K for the year ended December 31, 2017 (the “2017 Annual Report”).  As of September 30, 2018, our significant accounting policies are consistent with those discussed in Note 2 in the 2017 Annual Report, other than as noted below.

Basis of Presentation. As a result of the Business Combination, AMR was treated as the accounting acquirer and we are the accounting acquiree.  Pursuant to Financial Accounting Standards Board (“FASB”) Accounting Standard Codification (“ASC”) 805, Business Combinations, (“ASC 805”), our identifiable assets acquired and liabilities assumed were provisionally recorded at their estimated fair values on the Closing Date of the Business Combination (also referred to herein as the “acquisition date”).  Fair value adjustments related to the transaction have been pushed down to us resulting in our assets and liabilities being recorded at fair value as of the acquisition date.  As a result of the Transactions described above, the financial statements and certain footnote presentations separate the Company’s presentations into two distinct periods, the period before the consummation of the transaction (“Predecessor”) and the period after that date (“Successor”), to indicate the application of the different basis of accounting between the periods presented.  The Successor periods presented herein are for the three months ended September 30, 2018 and from February 9, 2018 to September 30, 2018 (collectively, “Successor Periods”); and the Predecessor periods presented herein are from January 1, 2018 to February 8, 2018 (“2018 Predecessor Period”), the three months ended September 30, 2017 and the nine months ended September 30, 2017 (“2017 Predecessor Period,” and, together with the 2018 Predecessor Period, the “Predecessor Periods”).

As noted above, we distributed our non-STACK assets and liabilities to the AM Contributor in connection with the closing of the Business Combination.  The distribution of our non-STACK assets and liabilities and the sale of our Weeks Island field during the fourth quarter of 2017 (collectively, the “non-STACK assets”) were part of the Company’s overall strategic shift to operate only in the eastern Anadarko Basin.  As a result, we have classified the assets and liabilities and operating results of the non-STACK assets as discontinued operations during the Predecessor Periods within the condensed consolidated financial statements.  See Note 7 — Discontinued Operations (Predecessor) for further discussion.

Principles of Consolidation and Reporting. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The condensed consolidated financial statements reflect our accounts after elimination of all significant intercompany transactions and balances.

The condensed consolidated financial statements included herein as of September 30, 2018, and for the three months ended September 30, 2018 (Successor) and the period from February 9, 2018 through September 30, 2018 (Successor), the period from January 1, 2018 through February 8, 2018 (Predecessor) and the three and nine months endedSeptember 30, 2017 (Predecessor),

11

are unaudited, and in the opinion of management, the information furnished reflects all material adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of consolidated financial position and of the results of operations for the interim periods presented.  The condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our annual consolidated financial statements for the year ended December 31, 2017, which were filed with the Securities and Exchange Commission (the “SEC”) in our 2017 Annual Report.  Certain reclassifications of prior period condensed consolidated financial statements have been made to conform to current reporting practices.  The reclassifications had no impact on net income (loss) or partners’ capital. The consolidated results of operations for interim periods are not necessarily indicative of results to be expected for a full year. 

The Company’s condensed consolidated statement of operations subsequent to the Business Combination includes depreciation and amortization expense on the Company’s property and equipment balances resulting from the fair value adjustments made under the new basis of accounting. Certain other items of income and expense were also impacted. Therefore, the Company’s financial information prior to the Business Combination is not comparable to its financial information subsequent to the Business Combination.

Use of Estimates. The preparation of 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period.

Reserve estimates significantly impact depreciation, depletion, and amortization expense and potential impairments of oil and natural gas properties and are subject to change based on changes in oil and natural gas prices and trends and changes in estimated reserve quantities. Other estimates are utilized to determine amounts related to oil and natural gas revenues, the value of oil and natural gas properties, the value of other property and equipment, bad debts, asset retirement obligations, derivative contracts, accounting for business combinations, state taxes, share-based compensation and contingencies and litigation. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances.  We review estimates and underlying assumptions on a regular basis.  Actual results may differ from these estimates.

Restricted Cash. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets and the consolidated statements of cash flows (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Cash and cash equivalents	$	8,869	$	3,660
Restricted cash	872		1,269
Cash of discontinued operations	—		61
Total cash, cash equivalents and restricted cash	$	9,741	$	4,990

Bond Premium on Senior Unsecured Notes. As a result of the pushdown accounting related to the Business Combination, the Company estimated the fair value of our $500.0 million senior unsecured notes at $533.6 million as of the acquisition date.  The amount in excess of the original principal balance was recorded as a bond premium, which is being amortized as a reduction to interest expense. 

Equity-Based Compensation (Successor). The Company recognizes compensation related to all stock-based awards in the financial statements based on their estimated grant-date fair value. AMR grants various types of stock-based awards including stock options, restricted stock and performance-based restricted stock units. The fair value of stock option awards is determined using the Black-Scholes option pricing model. Service-based restricted stock awards and performance-based restricted stock units are valued using the market price of AMR’s common stock on the grant date. Compensation cost is recognized ratably over the applicable vesting period.  See Note 16 — Equity-Based Compensation for additional information regarding the Company’s equity based compensation.

Going Concern. The Company’s management is required to evaluate an entity’s ability to continue as a going concern for a period of one year following the date of the issuance of the Company’s consolidated financial statements. Disclosure is required if substantial doubt exists about an entity’s ability to continue as a going concern during the evaluation period, including management’s plans to alleviate the conditions and events that raise substantial doubt of going concern, if applicable.

12

At the date of the issuance of these consolidated financial statements, management considers the Company to be a going concern and has prepared these consolidated financial statements on a going concern basis.

Recent Accounting Pronouncements Issued But Not Yet Adopted. In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (“ASU 2018-15”). The amendments in this standard align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal use software (and hosting arrangements that include an internal-use software license). Under this new standard, a customer in a hosting arrangement that is a service contract is required to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as a prepaid asset related to the service contract and which costs to expense. The capitalized implementation costs are to be expensed over the term of the hosting arrangement and reflected in the same line in the consolidated statement of operations as the fees associated with the hosting element of the arrangement. Similarly, capitalized implementation costs are to be presented in the statement of cash flows in the same line as payments made for fees associated with the hosting element. The Company will adopt this new standard at the same time as our parent company, which will be no later than the fiscal year beginning after December 15, 2019, although early adoption is permitted. The Company is currently evaluating the impact of this new standard on its consolidated financial position and results of operations and has not yet determined when to adopt and whether to apply the new standard retrospectively or prospectively to implementation costs incurred after the date of adoption.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which seeks to provide a single, comprehensive revenue recognition model for all contracts with customers concerning the recognition, measurement and disclosure of revenue from those contracts. Subsequent to the issuance of ASU 2014-09, the FASB amended the standard to provide clarification and interpretive guidance to assist entities with implementation efforts, including guidance pertaining to the presentation of revenues on a gross basis (revenues presented separately from associated expenses) versus a net basis. The core principle of the new amended standard is that a company will recognize revenue when it transfers promised goods and services to customers in an amount that reflects the consideration to which the company is entitled in exchange for those services. In order to comply with the new standard, companies will need to (i) identify performance obligations in each contract, (ii) estimate the amount of variable consideration to include in the transaction price and (iii) allocate the transaction price to each separate performance obligation.

ASU 2014-09, as amended, is effective for interim and annual periods beginning after December 15, 2017, except for emerging growth companies that elect to use the extended transition period for complying with any new or revised financial accounting standards pursuant to Section 7(a)(2)(b) of the Securities Act.

ASU 2014-09 allows for either full retrospective adoption, meaning the standard is applied to all periods presented in the financial statements, or modified retrospective adoption, meaning the standard is applied only to the most current period presented. As an emerging growth company, we previously elected to use the extended transition period to defer implementation of the new standard until the first quarter of 2019 using the modified retrospective method with a cumulative adjustment to retained earnings as necessary. AMR, our parent company, is also an emerging growth company, but will cease to be an emerging growth company on December 31, 2018, which will require them to adopt ASU 2014-09 on December 31, 2018, with modified retroactive implementation as of January 1, 2018. Accordingly, we will also adopt ASU 2014-09 at the same time as our parent company.

We are continuing our review of contracts for each of our revenue streams and evaluating the impact on our consolidated financial statements. We are continuing to evaluate the provisions of ASU 2014-09, as it relates to certain sales contracts, and in particular, as it relates to disclosure requirements. In addition, we are evaluating the impact, if any, on the presentation of our revenues and expenses under the new gross-versus-net presentation guidance and on our current accounting policies, including the need to make changes to relevant accounting policies and internal controls, if needed. Based on assessments performed to date, we do not expect ASU 2014-09 to have an effect on the timing of revenue recognition or our financial position. In addition, we currently expect the impact regarding gross-versus-net presentation to involve certain presentation changes specifically related to natural gas processing contracts; however, the impact of such presentation changes will not impact our consolidated operating income, net income or cash flows.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”), which supersedes ASC 840 “Leases” and creates a new topic, ASC 842 “Leases.” The amendments in this update require, among other things, that lessees recognize the following for all leases (except for short-term leases) at the commencement date: (i) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (ii) a right-of-use asset, which is an asset that represents a lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the

13

earliest comparative period presented in the financial statements. ASU 2016-02 also requires disclosures designed to provide information on the amount, timing, and uncertainty of cash flows arising from leases.  In January 2018, the FASB issued ASU No. 2018-01, Land easement practical expedient for transition to Topic 842 (“ASU 2018-01”), which provides an optional transition practical expedient to not evaluate under Topic 842 existing or expired land easements that were not previously accounted for as leases under Topic 840, Leases.  The standard, as amended, will be effective for interim and annual periods beginning after December 15, 2018. In the normal course of business, we enter into operating lease agreements to support our exploration and development operations and lease assets such as drilling rigs, well equipment, compressors, office space and other assets.

The standard provides several optional practical expedients in transition. We expect to elect the “package of practical expedients”, which permits us to forgo reassessment of our prior conclusions about lease identification, lease classification and initial direct costs for leases entered into prior to the effective date. We also expect to elect the land easement relief which permits us to forgo reassessment of existing or expired land easements not previously accounted for under ASC 840. Additionally, we expect to elect the practical expedient to not provide comparative reporting periods and therefore financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. We do not expect to elect the use-of-hindsight practical expedient.

At this time, we are evaluating the financial impact ASU 2016-02 will have on our financial statements; however, the adoption and implementation of ASU 2016-02 is expected to have an impact on our consolidated balance sheets resulting in an increase in both the assets and liabilities relating to our operating lease activities greater than twelve months.  The adoption may also result in a change in the amount of lease expense recorded on our consolidated statements of operations, as well as add additional disclosures.  We expect our implementation work team will complete its evaluation of this new standard by the end of 2018.  

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”), which is intended to reduce diversity in practice in how certain transactions are classified in the statements of cash flows. ASU 2016-15 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2017. As an emerging growth company, we had elected to use the extended transition period to defer adoption of this standard until 2019.  However, our parent company will lose its emerging growth status, effective December 31, 2018.  Accordingly, we will be required to adopt this new standard on December 31, 2018, when adopted by our parent company. The adoption of this guidance will not impact our financial position or results of operations but could result in presentational changes in our consolidated statements of cash flows. 

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard requires the use of a new “expected credit loss” impairment model rather than the “incurred loss” model used today. With respect to our trade receivables and certain other financial instruments, we may be required to (i) maintain and use lifetime loss information rather than annual loss data and (ii) forecast future economic conditions and quantify the effect of those conditions on future expected losses. The standard, which will be effective for us in fiscal years beginning after December 15, 2019, also requires additional disclosures regarding the credit quality of our trade receivables and other financial instruments. No determination has yet been made of the impact of this new standard on our financial position or results of operations.

14

NOTE 3 — SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow disclosures and non-cash investing and financing activities are presented below (in thousands):

໿

	Successor			Predecessor
	February 9, 2018			January 1, 2018		Nine
	Through			Through		Months Ended
	September 30, 2018			February 8, 2018		September 30, 2017
Supplemental cash flow information:
Cash paid for interest	$	22,073		$	1,145	$	25,675
Cash paid for state income taxes	7			—		—
Non-cash investing and financing activities:
Increase in asset retirement obligations	4,652			—		3,778
Asset retirement obligations assumed, purchased properties	—			—		705
Increase in accruals or payables for capital expenditures	35,967			4,712		41,322
Distribution of non-STACK (assets) net liability	—			33,102		—
Increase in accounts receivable for sale of assets	(524		)	—		—

NOTE 4 — ACCOUNTS RECEIVABLE

Accounts receivable consisted of the following (in thousands):

໿

	Successor			Predecessor
	September 30, 2018			December 31, 2017
Oil, natural gas and natural gas liquids sales	$	40,134		$	26,916
Joint interest billings	44,548			13,821
Pooling interest (1)	23,367			35,839
Allowance for doubtful accounts	(65		)	(415		)
Total accounts receivable, net	$	107,984		$	76,161

_________________

(1) Pooling interest relates to Oklahoma’s forced pooling process which requires the Company to offer mineral interest owners the option to participate in the drilling of proposed wells.  The pooling interest listed above represents costs of unbilled interests on wells which the Company incurred before the pooling process was completed.  Depending upon the outcome of the pooling process, these costs may be billed to potential working interest owners or added to oil and gas properties.

NOTE 5 — BUSINESS COMBINATION

On February 9, 2018 (the “Closing Date”), we consummated the transactions contemplated by the Contribution Agreement, dated August 16, 2017, with AMR (formerly Silver Run Acquisition Corporation II), AM Contributor, High Mesa Holdings GP, LLC,  the sole general partner of the AM Contributor, Alta Mesa Holdings GP, LLC, our sole general partner (“AMH GP”), and, solely for certain provisions therein, the equity owners of the AM Contributor (“AM Contribution Agreement”). Simultaneous with the execution of the AM Contribution Agreement, AMR entered into (i) a Contribution Agreement, dated August 16, 2017, with KFM Holdco, LLC, a Delaware limited liability company (the “KFM Contributor”), Kingfisher Midstream, LLC, a Delaware limited liability company (“Kingfisher”), and, solely for certain provisions therein, the equity owners of the KFM Contributor (the “KFM Contribution Agreement”); and (ii) a Contribution Agreement (the “Riverstone Contribution Agreement” and, together with the AM Contribution Agreement and the KFM Contribution Agreement, the “Contribution Agreements”) with Riverstone VI Alta Mesa Holdings, L.P., a Delaware limited partnership (the “Riverstone Contributor”).

Pursuant to the Contribution Agreements, SRII Opco, LP, a newly formed subsidiary of AMR (“SRII Opco”), acquired (a) (i) all of the limited partner interests in us and (ii) 100% of the economic interests and 90% of the voting interests in AMH GP ((i) and (ii) together, the “AM Contribution”) and (b) 100% of the economic interests in Kingfisher (the “Kingfisher Contribution”). The

15

acquisition of us and Kingfisher pursuant to the Contribution Agreements is referred to herein as the “Business Combination” and the transactions contemplated by the Contribution Agreements are referred to herein as the “Transactions.” As a result of the Transactions, AMR has obtained control over the management of AMH GP and, consequently, us.

At the closing of the Transactions, the AM Contributor received 138,402,398 common units representing limited partner interests (the “Common Units”) in SRII Opco.  The AM Contributor also acquired from AMR a number of newly issued shares of non-economic capital stock of AMR, designated as Class C common stock, par value $0.0001 per share (the “Class C Common Stock”), corresponding to the number of Common Units received by the AM Contributor at closing.  

Additionally, for a period of seven years following the closing, the AM Contributor will be entitled to receive additional SRII Opco Common Units (and acquire a corresponding number of shares of AMR’s Class C Common Stock) as earn-out consideration if the 20-day volume-weighted average price (“20-Day VWAP”) of the Class A Common Stock of AMR equals or exceeds the following prices (each such payment, an “Earn-Out Payment”):

໿

20-Day VWAP	Earn-Out Consideration
$14.00	10,714,285 Common Units
$16.00	9,375,000 Common Units
$18.00	13,888,889 Common Units
$20.00	12,500,000 Common Units

The AM Contributor will not be entitled to receive a particular Earn-Out Payment on more than one occasion and, if, on a particular date, the 20-Day VWAP entitles the AM Contributor to more than one Earn-Out Payment (each of which has not been previously paid), the AM Contributor will be entitled to receive each such Earn-Out Payment. The AM Contributor will be entitled to the earn-out consideration described above in connection with certain liquidity events of AMR, including a merger or sale of all or substantially all of AMR’s assets, if the consideration paid to holders of Class A Common Stock in connection with such liquidity event is greater than any of the above-specified 20-Day VWAP hurdles.

AMR also contributed $560 million in net cash to us at the closing. AMR’s source for these funds was from the sale of its securities to investors in a public offering and in private placements.  We used a portion of the amount to repay all outstanding balance under the senior secured revolving credit facility described in Note 11 — Long-Term Debt, Net.

Pursuant to the AM Contribution Agreement, AM Contributor delivered a final closing statement during the second quarter of 2018. Based on the final closing statement, the AM Contributor received an additional 1,197,934 SRII Opco Common Units and an equivalent number of shares of AMR’s Class C Common Stock.

The Business Combination has been accounted for using the acquisition method. The acquisition method of accounting is based on FASB ASC 805, Business Combination (“ASC 805”), and uses the fair value concepts defined in FASB ASC 820, Fair Value Measurements (“ASC 820”). ASC 805 requires, among other things, that our assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date by AMR, who was determined to be the accounting acquirer.  We have not completed the detailed valuation studies necessary to arrive at the final determination of the fair value of the assets acquired, the liabilities assumed and the related allocations of the purchase price in the Business Combination. As a result, the values of certain of our long-term assets and liabilities are preliminary in nature and are subject to change as additional information becomes available and as additional analysis is performed.  Pursuant to ASC 805, finalization of the values is to be completed within one year of the acquisition date.

16

Preliminary Estimated Purchase Price

AMR’s preliminary estimated purchase price consideration for Alta Mesa was as follows (in thousands):

໿

	February 9, 2018 (As initially reported)		Measurement Period Adjustment (1)		February 9, 2018 (As adjusted)
Preliminary Purchase Consideration:(2)
SRII Opco Common Units issued (3)	$	1,251,782	$	9,467	$	1,261,249
Estimated fair value of contingent earn-out purchase consideration (4)	284,109		—		284,109
Total purchase price consideration	$	1,535,891	$	9,467	$	1,545,358

_________________

(1) The measurement period adjustment relates to the issuance of 1,197,934 of additional SRII Opco Common Units, valued at approximately $7.90 per unit, to the AM Contributor based on a final closing statement agreed to by the parties during the three months ended June 30, 2018 (Successor).

(2) The preliminary purchase price consideration is for 100% of the limited partner interests in us and 100% of the economic interests and 90% of the voting interests in AMH GP.  

(3) At closing, the Riverstone Contributor received consideration of 20,000,000 SRII Opco Common Units and the AM Contributor received consideration of 138,402,398 SRII Opco Common Units. The estimated fair value of an SRII Opco Common Unit was approximately $7.90 per unit and reflects discounts for holding requirements and liquidity.

(4) For a period of seven years following Closing, the AM Contributor will be entitled to receive an earn-out consideration to be paid in the form of SRII Opco Common Units (and a corresponding number of shares of AMR Class C Common Stock) if the 20-day VWAP of the Class A Common Stock of AMR equals or exceeds the specified prices pursuant to the AM Contribution Agreement. Pursuant to ASC 805 and ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), we have determined that the fair value of the earn-out consideration was approximately $284.1 million, which was classified as equity. The fair value of the contingent equity earn-out consideration was determined using the Monte Carlo simulation valuation method based on Level 3 inputs as defined in the fair value hierarchy. The key inputs included the listed market price for Class A Common Stock, market volatility of a peer group of companies similar to AMR (due to the lack of trading activity in the Class A Common Stock), no dividend yield, an expected life of each earn-out threshold based on the remaining contractual term of the contingent liability earn-out period and a risk-free rate based on U.S. dollar overnight indexed swaps with a maturity equivalent to the earn-out’s expected life.

17

Preliminary Estimated Purchase Price Allocation

The allocation of AMR’s preliminary estimate of the purchase consideration to the assets acquired and liabilities assumed in the acquisition of Alta Mesa was as follows (in thousands):

໿

	February 9, 2018 (As initially reported)		Measurement Period Adjustment (1)			February 9, 2018 (As adjusted)
Estimated Fair Value of Assets Acquired(2)
Cash, cash equivalents and short term restricted cash	$	10,345	$	—		$	10,345
Accounts receivable	101,745		—			101,745
Other receivables	1,222		—			1,222
Receivables due from related party	907		—			907
Prepaid expenses and other current assets	1,405		—			1,405
Derivative financial instruments	352		—			352
Property and equipment:(3)
Oil and natural gas properties, successful efforts	2,314,858		(1,479		)	2,313,379
Other property and equipment, net	43,318		—			43,318
Notes receivable due from related party	12,454		—			12,454
Deposits and other long-term assets	10,286		—			10,286
Total fair value of assets acquired	2,496,892		(1,479		)	2,495,413
Estimated Fair Value of Liabilities Assumed (2)
Accounts payable and accrued liabilities	210,867		(10,946		)	199,921
Accounts payable — affiliate	5,476		—			5,476
Advances from non-operators	6,803		—			6,803
Advances from related party	47,506		—			47,506
Asset retirement obligations (3)	5,998		—			5,998
Derivative financial instruments	11,585		—			11,585
Long-term debt(4)	667,700		—			667,700
Other long-term liabilities	5,066		—			5,066
Total fair value of liabilities assumed	961,001		(10,946		)	950,055
Total consideration and fair value	$	1,535,891	$	9,467		$	1,545,358

_________________

(1) The measurement period adjustments are recognized in the reporting period in which the adjustments were determined and calculated as if the accounting had been completed at the acquisition date.

(2) The assets acquired and liabilities assumed relate to Alta Mesa’s STACK assets.

(3) The estimated fair values of oil and natural gas properties and asset retirement obligations were determined using valuation techniques that convert future cash flows to a single discounted amount and involve the use of certain inputs that are not observable in the market (Level 3 inputs). Significant inputs include, but are not limited to recoverable reserves, production rates, future operating and development costs, future commodity prices, appropriate risk-adjusted discount rates and other relevant data. These inputs required significant judgments and estimates by management at the time of the valuation. Actual results may vary from these estimates.

(4) Represents the approximate fair value as of the acquisition date of Alta Mesa’s $500.0 million aggregate principal amount of 7.875% senior unsecured notes due December 15, 2024, totaling approximately $533.6 million, based on Level 1 inputs, and outstanding borrowings under the Eighth A&R credit facility (described in Note 11 — Long-Term Debt, Net) of approximately $134.1 million as of the acquisition date.

18

NOTE 6 — PROPERTY AND EQUIPMENT

Property and equipment consisted of the following (in thousands):

	Successor			Predecessor
	September 30, 2018			December 31, 2017
OIL AND NATURAL GAS PROPERTIES
Unproved properties	$	865,695		$	84,590
Accumulated impairment of unproved properties	—			—
Unproved properties, net	865,695			84,590
Proved oil and natural gas properties	1,913,526			1,061,105
Accumulated depreciation, depletion, amortization and impairment	(81,464		)	(251,065		)
Proved oil and natural gas properties, net	1,832,062			810,040
TOTAL OIL AND NATURAL GAS PROPERTIES, net	2,697,757			894,630
OTHER PROPERTY AND EQUIPMENT
Land	5,059			2,912
Salt water disposal system	88,176			30,990
Office furniture and equipment and vehicles	2,325			20,008
Accumulated depreciation	(1,604		)	(21,770		)
OTHER PROPERTY AND EQUIPMENT, net	93,956			32,140
TOTAL PROPERTY AND EQUIPMENT, net	$	2,791,713		$	926,770

In conjunction with pushdown accounting, property and equipment was measured at fair value as of the acquisition date, which also impacted how value was assigned between the categories within property and equipment (see Note 5 — Business Combination for details).

NOTE 7 — DISCONTINUED OPERATIONS (Predecessor)

We distributed our non-STACK assets and related liabilities to the AM Contributor immediately prior to the Closing Date of the Business Combination.  The distribution of our non-STACK assets and related liabilities and the sale of our Weeks Island field during the fourth quarter of 2017 were part of our overall strategic shift to operate only in the eastern Anadarko Basin.  As a result, the Predecessor’s non-STACK assets and liabilities have been presented as discontinued operations in the consolidated balance sheets.  The operating results directly related to non-STACK assets and liabilities have been segregated and presented as discontinued operations within the condensed consolidated financial statements in the 2018 Predecessor Period and the 2017 Predecessor Periods. 

Prior to the Business Combination, we had notes payable to our founder (“Founder Notes”) that bore simple interest at 10%.  In connection with the Transactions described in Note 5 –Business Combination, the Founder Notes were converted into an equity interest in the AM Contributor immediately prior to the closing of the Business Combination as they were considered part of the non-STACK asset distribution.  The balance of the Founder Notes at the time of conversion was approximately $28.3 million, including accrued interest.  Interest on the Founder Notes was $0.1 million for the 2018 Predecessor Period and $0.3 million and $0.9 million for the three months ended September 30, 2017 (Predecessor) and 2017 Predecessor Period, respectively.

19

The assets and liabilities directly related to the non-STACK assets presented as discontinued operations in the condensed consolidated balance sheets were as follows (in thousands):

໿

	Predecessor
	December 31, 2017
Assets associated with discontinued operations:
Current assets
Cash	$	61
Accounts receivable	4,980
Other receivables	154
Total current assets	5,195
Noncurrent assets
Investments in LLC - Cost	9,000
Proved oil and natural gas properties, net	15,408
Unproved properties, net	15,504
Land	2,706
Other long-term assets	1,167
Total noncurrent assets	43,785
Total assets associated with discontinued operations	$	48,980
Liabilities associated with discontinued operations:
Current liabilities
Accounts payable and accrued liabilities	$	7,882
Asset retirement obligations	7,537
Total current liabilities	15,419
Noncurrent liabilities
Asset retirement obligations, net of current	37,049
Founder notes	28,166
Other long-term liabilities	1,647
Total noncurrent liabilities	66,862
Total liabilities associated with discontinued operations	$	82,281

20

The operating results directly related to the non-STACK assets and liabilities presented as discontinued operations within the condensed consolidated financial statements were as follows (in thousands):

໿

	Predecessor
	Three Months Ended September 30, 2017			January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Operating revenues and other:
Oil	$	10,994		$	1,617		$	36,122
Natural gas	2,376			1,023			7,964
Natural gas liquids	571			236			1,613
Other revenues	72			16			274
Total operating revenues	14,013			2,892			45,973
Loss on sale of assets	—			(1,923		)	—
Gain on acquisition of oil and gas properties	—			—			1,626
Total operating revenues and other	14,013			969			47,599
Operating expenses:
Lease operating expense	6,888			1,770			21,944
Marketing and transportation expense	352			83			1,080
Production taxes	1,443			167			5,100
Workover expense	273			127			1,981
Exploration expense	1,874			—			8,042
Depreciation, depletion and amortization	4,625			630			16,835
Impairment expense	82			5,560			28,018
Accretion expense	287			101			1,213
General and administrative expense	13			21			60
Total operating expenses	15,837			8,459			84,273
Other income (expense)
Interest expense	(305		)	(103		)	(904		)
Interest income and other	88			—			88
Total other income (expense)	(217		)	(103		)	(816		)
Loss from discontinued operations, net of state income taxes	$	(2,041	)	$	(7,593	)	$	(37,490	)

The total operating and investing cash flows of the non-STACK assets were as follows (in thousands):

໿

	Predecessor
	January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Total operating cash flows of discontinued operations	$	(6,838	)	$	16,166
Total investing cash flows of discontinued operations	(570		)	(15,950		)

NOTE 8 — FAIR VALUE MEASUREMENTS

We follow ASC 820, which provides a hierarchy of fair value measurements based on the inputs to the fair value estimation process. It requires disclosure of fair values classified according to defined “levels,” which are based on the reliability of the evidence used to determine fair value, with Level 1 being the most reliable and Level 3 the least reliable. Level 1 evidence consists of observable inputs, such as quoted prices in an active market. Level 2 inputs typically correlate the fair value of the asset or liability to a similar, but not identical item which is actively traded. Level 3 inputs include at least some unobservable inputs, such as valuation models developed using the best information available in the circumstances.

21

In connection with our acquisition, we recorded the fair value of our $500.0 million unsecured senior notes at $533.6 million as of the acquisition date. We have estimated the fair value of our senior notes to be $476.3 million at September 30, 2018 (Successor).  This estimation was based on the most recent trading values of the senior notes at or near the reporting date, which is a Level 1 determination. See Note 11— Long-Term Debt, Net for information on long-term debt.

We utilize the modified Black-Scholes and the Turnbull Wakeman option pricing models to estimate the fair values of oil, natural gas and natural gas liquids derivative contracts. Inputs to these models include observable inputs from the NYMEX for futures contracts, and inputs derived from NYMEX observable inputs, such as implied volatility of oil, natural gas and natural gas liquids prices. We have classified the inputs used to determine fair values of all our oil, natural gas and natural gas liquids derivative contracts as Level 2.

Oil and natural gas properties are subject to impairment testing and potential impairment write down. During the 2017 Predecessor Period, certain of our oil and natural gas properties with a carrying amount of $3.3 million were written down to their fair value of $2.1 million, resulting in an impairment charge of $1.2 million.  Significant Level 3 assumptions used in the calculation of estimated discounted cash flows in the impairment analysis included our estimate of future oil and natural gas prices, production costs, development expenditures, estimated timing of production of proved reserves, appropriate risk-adjusted discount rates and other relevant data.

New additions to asset retirement obligations result from estimations for new or acquired properties. Such estimations of fair value are based on present value techniques that utilize company-specific information for such inputs as cost and timing of plugging and abandonment of wells and facilities. These inputs are classified as Level 3. We recorded $1.7 million, zero and $1.0 million in additions to asset retirement obligations measured at fair value during the Successor Period, the 2018 Predecessor Period, and the 2017 Predecessor Period, respectively.

The following table presents information about our financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017, and indicates the fair value hierarchy of the valuation techniques we utilized to determine such fair value:

	Level 1	Level 2		Level 3	Total
	(in thousands)
At September 30, 2018: (Successor)
Financial Assets:
Derivative contracts for oil and natural gas	—	$	5,670	—	$	5,670
Financial Liabilities:
Derivative contracts for oil and natural gas	—	$	47,144	—	$	47,144
At December 31, 2017: (Predecessor)
Financial Assets:
Derivative contracts for oil and natural gas	—	$	4,416	—	$	4,416
Financial Liabilities:
Derivative contracts for oil and natural gas	—	$	24,609	—	$	24,609

The amounts above are presented on a gross basis.  We will net the value of assets and liabilities with the same counterparty for purposes of presentation in our condensed consolidated balance sheets where master netting agreements are in place. For additional information on derivative contracts, see Note 9 — Derivative Financial Instruments.

22

NOTE 9 — DERIVATIVE FINANCIAL INSTRUMENTS

We have entered into forward-swap contracts and collar contracts to reduce our exposure to price risk in the spot market for oil, natural gas and natural gas liquids. From time to time, we also utilize financial basis swap contracts, which address the price differential between market-wide benchmark prices and other benchmark pricing referenced in certain of our oil, natural gas and natural gas liquids sales contracts. Substantially all of our derivative contracts are executed by affiliates of our lenders under the senior secured revolving credit facility described in Note 11 — Long-Term Debt, Net, and are collateralized by the security interests of the respective affiliated lenders in certain of our assets under the senior secured revolving credit facility. The derivative contracts settle monthly and are scheduled to coincide with oil production equivalent to barrels (bbl) per month, natural gas production equivalent to volumes in millions of British thermal units (MMBtu) per month, and natural gas liquids production equivalent to volumes in gallons (gal) per month. The derivative contracts represent agreements between us and the counterparties to exchange cash based on a designated price, or in the case of financial basis hedging contracts, based on a designated price differential between various benchmark prices. Cash settlement occurs monthly. No derivative contracts have been entered into for trading or speculative purposes. 

From time to time, we enter into interest rate swap agreements with financial institutions to mitigate the risk of loss due to changes in interest rates.  As of September 30, 2018, we are not a party to any interest rate swap agreements.

We have not designated any of our derivative contracts as fair value or cash flow hedges.  Accordingly, we use mark-to-market accounting, recognizing changes in the fair value of derivative contracts in the condensed consolidated statements of operations at each reporting date.

Derivative contracts are subject to master netting arrangements and are presented on a net basis in the condensed consolidated balance sheets. This netting can cause derivative assets to be ultimately presented in a liability account on the condensed consolidated balance sheets. Likewise, derivative liabilities could be presented in a derivative asset account. 

The following table summarizes the fair value and classification of our derivative instruments, none of which have been designated as hedging instruments under ASC 815:

Fair Values of Derivative Contracts:

໿

	September 30, 2018 (Successor)
Balance sheet location	Gross fair value of assets		Gross liabilities offset against assets in the Balance Sheet			Net fair value of assets presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current assets	$	2,407	$	(2,407	)	$	—
Derivative financial instruments, long-term assets	3,263		(3,263		)	—
Total	$	5,670	$	(5,670	)	$	—

໿

Balance sheet location	Gross fair value of liabilities		Gross assets offset against liabilities in the Balance Sheet			Net fair value of liabilities presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current liabilities	$	36,803	$	(2,407	)	$	34,396
Derivative financial instruments, long-term liabilities	10,341		(3,263		)	7,078
Total	$	47,144	$	(5,670	)	$	41,474

໿

23

	December 31, 2017 (Predecessor)
Balance sheet location	Gross fair value of assets		Gross liabilities offset against assets in the Balance Sheet			Net fair value of assets presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current assets	$	1,406	$	(1,190	)	$	216
Derivative financial instruments, long-term assets	3,010		(3,002		)	8
Total	$	4,416	$	(4,192	)	$	224

໿

Balance sheet location	Gross fair value of liabilities		Gross assets offset against liabilities in the Balance Sheet			Net fair value of liabilities presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current liabilities	$	20,493	$	(1,190	)	$	19,303
Derivative financial instruments, long-term liabilities	4,116		(3,002		)	1,114
Total	$	24,609	$	(4,192	)	$	20,417

The following table summarizes the effect of our derivative instruments in the condensed consolidated statements of operations (in thousands):

໿

	Successor			Predecessor			Successor			Predecessor
Derivatives not	Three			Three			February 9, 2018			January 1, 2018		Nine
designated as hedging	Months Ended			Months Ended			Through			Through		Months Ended
instruments under ASC 815	September 30, 2018			September 30, 2017			September 30, 2018			February 8, 2018		September 30, 2017
Gain (loss) on derivative contracts
Oil commodity contracts	$	(12,339	)	$	(10,873	)	$	(63,630	)	$	5,431	$	31,665
Natural gas commodity contracts	1,127			1,035			553			1,867		6,763
Natural gas liquids commodity contracts	—			(630		)	—			—		(404		)
Total gain (loss) on derivative contracts	$	(11,212	)	$	(10,468	)	$	(63,077	)	$	7,298	$	38,024

The Company periodically monitors the creditworthiness of its counterparties. Although our counterparties provide no collateral, the master derivative agreements with each counterparty effectively allow us, under certain circumstances, to set-off an unpaid hedging agreement receivable against the interest of the counterparty in any outstanding balance under the senior secured revolving credit facility described in Note 11 — Long-Term Debt, Net.

If a counterparty were to default on payment of an obligation under the master derivative agreements, we could be exposed to commodity price fluctuations, and the protection intended by the derivative could be lost. The value of our derivative financial instruments would be impacted.

24

We had the following open derivative contracts for crude oil at September 30, 2018:

OIL DERIVATIVE CONTRACTS

໿

໿

	Volume in bbls	Weighted Average		Range
Settlement Period and Type of Contract				High		Low
2018
Price Swap Contracts	552,000	$	53.55	$	61.26	$	50.27
Collar Contracts
Short Call Options	552,000	61.28		64.60		60.50
Long Put Options	552,000	51.67		60.00		50.00
Short Put Options	552,000	42.08		52.50		40.00
2019
Price Swap Contracts	182,500	63.03		63.03		63.03
Collar Contracts
Short Call Options	2,701,000	66.31		75.20		56.50
Long Put Options	2,883,500	53.80		62.00		50.00
Short Put Options	2,883,500	42.72		52.00		37.50
2020
Collar Contracts
Short Call Options	366,000	67.00		73.80		60.20
Long Put Options	1,317,600	56.46		62.50		50.00
Short Put Options	1,317,600	45.83		50.00		40.00

We had the following open derivative contracts for natural gas at September 30, 2018:

NATURAL GAS DERIVATIVE CONTRACTS

໿

	Volume in MMBtu	Weighted Average		Range
Settlement Period and Type of Contract				High		Low
2018
Price Swap Contracts	1,842,500	$	2.95	$	3.09	$	2.75
Collar Contracts
Short Call Options	1,832,500	3.36		3.75		3.14
Long Put Options	1,527,500	2.89		2.90		2.75
Short Put Options	610,000	2.40		2.40		2.40
2019
Price Swap Contracts	10,905,000	2.69		3.09		2.64
Collar Contracts
Short Call Options	4,000,000	3.31		3.75		3.17
Long Put Options	3,550,000	2.81		2.90		2.70
Short Put Options	2,425,000	2.27		2.40		2.20
2020
Collar Contracts
Short Call Options	2,275,000	3.19		3.20		3.17
Long Put Options	9,150,000	2.57		2.70		2.50
Short Put Options	9,150,000	2.07		2.20		2.00
2021
Collar Contracts
Long Put Options	2,250,000	2.65		2.65		2.65
Short Put Options	2,250,000	2.15		2.15		2.15

In those instances where contracts are identical as to time period, volume and strike price, and counterparty, but opposite as to direction (long and short), the volumes and average prices have been netted in the two tables above.  Prices stated in the table

25

above for oil may settle against either the NYMEX index or may reflect a mix of positions settling on various combinations of these benchmarks.

We had the following open financial basis swaps at September 30, 2018:

NATURAL GAS BASIS SWAP DERIVATIVE CONTRACTS

Volume in MMBtu(1)	Reference Price 1 (1)	Reference Price 2 (1)	Period			Weighted Average Spread ($ per MMBtu)
460,000	OneOK	NYMEX Henry Hub	Jul '19	—	Dec '19	$	(0.93	)
4,445,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Oct '18	—	Dec '18	(0.63		)
17,950,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Jan '19	—	Dec '19	(0.68		)
910,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Jan '20	—	Mar '20	(0.49		)
152,500	San Juan	NYMEX Henry Hub	Nov '18	—	Dec '18	(0.47		)
2,365,000	San Juan	NYMEX Henry Hub	Jan '19	—	Oct '19	(0.78		)

_________________

(1) Represents short swaps that fix the basis differentials between OneOK, Tex/OKL Panhandle Eastern Pipeline (“PEPL”), San Juan and NYMEX Henry Hub.

OIL BASIS SWAP DERIVATIVE CONTRACTS

໿

Volume in bbl (1)	Reference Price 1 (1)	Reference Price 2 (1)	Period			Weighted Average Spread ($ per bbl)
552,000	CMA Oil	WTI	Oct '18	—	Dec '18	$	(0.54	)

_________________

(1) Represents basis swaps for the basis differentials between NYMEX CMA (Calendar Monthly Average) Roll that reconcile the trade month versus the delivery month for physical contract pricing and West Texas Intermediate (“WTI”).

NOTE 10 — ASSET RETIREMENT OBLIGATIONS

A summary of the changes in asset retirement obligations is included in the table below (in thousands):

໿

	2018
Balance, as of January 1 (Predecessor)	$	10,469
Liabilities settled	(63		)
Revisions to estimates	63
Accretion expense	39
Balance, as of February 8 (Predecessor)	$	10,508
Balance, as of February 9 (Successor)	$	—
Liabilities assumed from Business Combination	5,998
Liabilities incurred	1,689
Liabilities settled	(1,249		)
Liabilities transferred in sale of properties	(20		)
Revisions to estimates (1)	3,562
Accretion expense	489
Balance, as of September 30 (Successor)	10,469
Less: Current portion	1,300
Long-term portion	$	9,169

⁽¹⁾The total revisions included $3.0 million related to additions to property, plant and equipment for the Successor Period.

26

NOTE 11 — LONG-TERM DEBT, NET

Long-term debt, net consisted of the following (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Senior secured revolving credit facility	$	80,000	$	117,065
7.875% senior unsecured notes due 2024	500,000		500,000
Unamortized premium on senior unsecured notes	30,354		—
Unamortized deferred financing costs	—		(9,625		)
Total long-term debt, net	$	610,354	$	607,440

Senior Secured Revolving Credit Facility (Successor). In connection with the consummation of the Business Combination, all indebtedness at that time under the senior secured revolving credit facility was repaid in full. On February 9, 2018, and in connection with the closing of the AM Contribution Agreement (as described in Note 5), we entered into the Eighth Amended and Restated Credit Agreement with Wells Fargo Bank, National Association, as the administrative agent (the “Eighth A&R credit facility”). The Eighth A&R credit facility is for an aggregate maximum credit amount of $1.0 billion with an initial $350.0 million borrowing base. In April 2018, our borrowing base was increased to $400.0 million. This borrowing base was reaffirmed by the lenders subsequent to September 30, 2018. The next scheduled redetermination will occur in April 2019, at which time the borrowing base may be increased, lowered or stay the same. The Eighth A&R credit facility does not permit us to borrow funds if, at the time of such borrowing, we are not in compliance with the financial covenants set forth in the Eighth A&R credit facility. As of September 30, 2018, we had $80.0 million of borrowings outstanding under the Eighth A&R credit facility and had $21.9 million of outstanding letters of credit, leaving a total borrowing capacity of $298.1 million remaining available for future use.

The principal amounts borrowed are payable on the maturity date of February 9, 2023. We have a choice of borrowing in Eurodollars or at the reference rate, with such borrowings bearing interest, payable quarterly for reference rate loans or, for Eurodollar loans, in one, three or six-month tranches. Eurodollar loans bear interest at a rate per annum equal to the applicable LIBOR rate, plus a margin ranging from 2.00% to 3.00%.  Reference rate loans bear interest at a rate per annum equal to the greater of (i) the agent bank’s reference rate, (ii) the federal funds effective rate plus 50 basis points or (iii) the rate for one-month Eurodollar loans plus 1.00%, plus a margin ranging from 1.00% to 2.00%.  

The amounts outstanding under the Eighth A&R credit facility are secured by the first priority liens on substantially all of the Company’s, and its material operating subsidiaries’, oil and natural gas properties and associated assets and all of the equity of our material operating subsidiaries that are guarantors of the Eighth A&R credit facility. Additionally, SRII Opco and AMH GP have pledged their respective limited partner interests in us as security for our obligations. If an event of default occurs under the Eighth A&R credit facility, the administrative agent will have the right to proceed against the pledged collateral and take control of substantially all of our assets and our material operating subsidiaries that are guarantors.

The Eighth A&R credit facility, as amended effective August 13, 2018, contains restrictive covenants that may limit our ability to, among other things, incur additional indebtedness, sell assets, guaranty or make loans to others, make investments, enter into mergers, make certain payments and distributions in excess of specific amounts, enter into or be party to hedge agreements, amend organizational documents, incur liens and engage in certain other transactions without the prior consent of the lenders. The Eighth A&R credit facility permits us to make distributions to any parent entity (i) to pay for reimbursement of third party costs and general and administrative expenses (“G&A”) incurred in the ordinary course of business by such parent entity or (ii) in order to permit such parent entity to (x) make permitted tax distributions and (y) pay the obligations under the tax receivable agreement.

The Eighth A&R credit facility also requires us to maintain the following two financial ratios:

• a current ratio, subject to various adjustments as defined in the Eighth A&R credit facility, tested quarterly, commencing with the fiscal quarter ended June 30, 2018, of our consolidated current assets to our consolidated current liabilities of not less than 1.0 to 1.0 as of the end of each fiscal quarter; and

• a leverage ratio, tested quarterly, commencing with the fiscal quarter ended June 30, 2018, of our consolidated debt (other than obligations under hedge agreements) as of the end of such fiscal quarter to our consolidated EBITDAX annualized by multiplying EBITDAX for the period of (a) the fiscal quarter ended June 30, 2018 times 4, (b) the two fiscal quarter periods ended September 30, 2018 times 2 (c) the three fiscal quarter periods ending December 31, 2018 times 4/3rds and

27

(d) for each fiscal quarter on or after March 31, 2019, EBITDAX for the four-fiscal quarter period then ended, of not greater than 4.0 to 1.0.

As of September 30, 2018, we were in compliance with the financial ratios described above.

Senior Secured Revolving Credit Facility (Predecessor).  As of December 31, 2017, the Company had $117.1 million of borrowings outstanding.  At the date of the Business Combination, the outstanding balance under our credit facility was paid off.

Senior Unsecured Notes. We have $500.0 million in aggregate principal amount of 7.875% senior unsecured notes (the “senior notes”) which were issued at par by us and our wholly owned subsidiary Alta Mesa Finance Services Corp. (collectively, the “Issuers”) during the fourth quarter of 2016.  The senior notes were issued in a private placement but were exchanged for substantially identical registered senior notes in November 2017. 

The senior notes will mature on December 15, 2024, and interest is payable semi-annually on June 15 and December 15 of each year. At any time prior to December 15, 2019, we may, from time to time, redeem up to 35% of the aggregate principal amount of the senior notes for an amount of cash not greater than the net cash proceeds from certain equity offerings at a redemption price of 107.875% of the principal amount, plus accrued and unpaid interest, if any, to the date of redemption, if at least 65% of the aggregate principal amount of the senior notes remains outstanding after such redemption and the redemption occurs within 120 days of the closing date of such equity offering. At any time prior to December 15, 2019, we may, on any one or more occasions, redeem all or part of the senior notes for cash at a redemption price equal to 100% of their principal amount of the senior notes redeemed plus an applicable make-whole premium and accrued and unpaid interest, if any, to the date of redemption. Upon the occurrence of certain kinds of change of control, each holder of the senior notes may require us to repurchase all or a portion of the senior notes for cash at a price equal to 101% of the aggregate principal amount of the senior notes, plus accrued and unpaid interest, if any, to the date of repurchase. On and after December 15, 2019, we may redeem the senior notes, in whole or in part, at redemption prices (expressed as percentages of principal amount) equal to 105.906% for the twelve-month period beginning on December 15, 2019, 103.938% for the twelve-month period beginning on December 15, 2020, 101.969% for the twelve-month period beginning on December 15, 2021 and 100.000% beginning on December 15, 2022, plus accrued and unpaid interest, if any, to the date of redemption.

The senior notes are fully and unconditionally guaranteed on a senior unsecured basis by each of our material subsidiaries, subject to certain customary release provisions. Accordingly, they will rank equal in right of payment to all of our existing and future senior indebtedness; senior in right of payment to all of our existing and future indebtedness that is expressly subordinated to the senior notes or the respective guarantees; effectively subordinated to all of our existing and future secured indebtedness to the extent of the value of the collateral securing such indebtedness, including amounts outstanding under our credit facility; and structurally subordinated to all existing and future indebtedness and obligations of any of our subsidiaries that do not guarantee the senior notes.

The senior notes contain certain covenants limiting the Issuers’ ability and the ability of the Restricted Subsidiaries (as defined in the indenture governing the senior notes to, under certain circumstances, prepay subordinated indebtedness, pay distributions, redeem stock or make certain restricted investments; incur indebtedness; create liens on the Issuers’ assets to secure debt; restrict dividends, distributions or other payments; enter into transactions with affiliates; designate subsidiaries as unrestricted subsidiaries; sell or otherwise transfer or dispose of assets, including equity interests of restricted subsidiaries; effect a consolidation or merger; and change our line of business. 

Under the terms of the indenture for the senior notes, if we experience certain specific change of control events, unless the Issuers have previously or concurrently exercised their right to redeem all of the senior notes under the optional redemption provision, such holder has the right to require us to purchase such holder’s senior notes at 101% of the principal amount plus accrued and unpaid interest to the date of the purchase.  The closing of the Business Combination with AMR did not constitute a change of control under the indenture governing the senior notes because certain existing owners of the Company and SRII Opco entered into an amended and restated voting agreement with respect to the voting interests in AMH GP.  See Note 5 — Business Combination to the consolidated condensed financial statements for further detail.

The indenture contains customary events of default, including: 

• default in any payment of interest on the senior notes when due, continued for 30 days;

• default in the payment of principal or premium, if any, on the senior notes when due;

• failure by the Issuers or any subsidiary guarantor to comply with its obligations under the indenture;

• default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any indebtedness for money borrowed by the Issuers or restricted subsidiaries;

28

• certain events of bankruptcy, insolvency or reorganization of the Issuers or restricted subsidiaries; and

• failure by the Issuers or certain subsidiaries that would constitute a payment of final judgment aggregating in excess of $20 million.

If an event of default occurs and is continuing, the holders of such indebtedness may elect to declare all the funds borrowed to be immediately due and payable with accrued and unpaid interest.  Borrowings under other debt instruments that contain cross-acceleration or cross-default provisions may also be accelerated and become due and payable.

As of September 30, 2018, we were in compliance with the indentures governing the senior notes.

Bond Premium (Successor). As discussed in Note 5, the fair value of our senior notes as of the acquisition date was $533.6 million.  The bond premium of $33.6 million is being amortized over the respective term of the senior notes.  The bond premium amortization recognized in interest expense was $1.2 million and $3.3 million for the three months ended September 30, 2018 (Successor) and the Successor Period, respectively. The unamortized bond premium related to the senior notes is included as a component of long-term debt in the condensed consolidated balance sheet as of September 30, 2018. 

Deferred financing costs. As of December 31, 2017 (Predecessor), we had $11.4 million of unamortized deferred financing costs related to both our senior secured notes and the Eighth A&R credit facility. As a result of the Business Combination, our unamortized deferred financing costs were adjusted to a fair value of zero at February 9, 2018.  During the Successor Period, we incurred additional deferred financing costs related to the Eighth A&R credit facility of $1.4 million. These costs are reflected as deferred financing costs, net in other noncurrent assets in the condensed consolidated balance sheets as of September 30, 2018 (Successor). The amortization of the deferred financing costs is included in interest expense in the consolidated statements of operations. For the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), the amortization of deferred financing costs was $0.1 million and $0.7 million, respectively. For the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, the amortization of deferred financing costs was $0.2 million, $0.2 million and $2.2 million, respectively.   

NOTE 12 — ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

The following provides the details of accounts payable and accrued liabilities (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Accruals for capital expenditures	$	83,687	$	48,771
Revenues and royalties payable	44,626		29,514
Accruals for operating expenses/taxes	8,156		14,632
Accrued interest	11,651		2,587
Derivative settlement payable	4,593		2,106
Other	3,408		4,301
Total accrued liabilities	156,121		101,911
Accounts payable	71,018		68,578
Accounts payable and accrued liabilities	$	227,139	$	170,489

NOTE 13 — COMMITMENTS AND CONTINGENCIES

Commitments

We lease office space and certain field equipment such as compressors, under long-term operating lease agreements.  On April 1, 2018, we amended the lease agreement for our corporate headquarters located in Houston, Texas.  The amended lease agreement provides for additional office space and extends the original lease term through April 2028.  Due to the amendment, we have additional lease commitment obligations of approximately $17.6 million through April 2028. Any initial rent-free months are amortized over the life of the lease.

The Company has entered into certain firm transportation contracts that extend through 2028.  At September 30, 2018, the future minimum commitments related to these contracts were approximately $5.7 million a year.

Contingencies

Environmental claims. Various landowners have sued us in lawsuits concerning several fields in which we have, or historically had, operations.  The lawsuits seek injunctive relief and other relief, including unspecified amounts in both actual and punitive damages for alleged breaches of mineral leases and alleged failure to restore the plaintiffs’ lands from alleged contamination and otherwise from our oil and natural gas operations. We are unable to express an opinion with respect to the likelihood of an unfavorable outcome of the various environmental claims or to estimate the amount or range of potential loss should the outcome be unfavorable. Therefore, we have not provided any material amounts for these claims in our condensed consolidated financial statements at September 30, 2018.

Title/lease disputes. Title and lease disputes may arise in the normal course of our operations. These disputes are usually small but could result in an increase or decrease in reserves and/or other forms of settlement, such as cash, once a final resolution to the title dispute is made.

Litigation (Predecessor). On April 13, 2005, Henry Sarpy and several other plaintiffs (collectively, “Plaintiffs”) filed a petition against Exxon, Extex, The Meridian Resource Corporation (“TMRC,” our former subsidiary), and the State of Louisiana for contamination of their land in the New Sarpy and/or Good Hope Field in St. Charles Parish.  Plaintiffs claimed they are owners of land upon which oil field waste pits containing dangerous and contaminating substances are located.  Plaintiffs alleged that they discovered in May 2004 that their property is contaminated with oil field wastes greater than represented by Exxon.  The property was originally owned by Exxon and was sold to TMRC.  TMRC subsequently sold the property to Extex.  On April 14, 2015, TMRC entered into a Memorandum of Understanding with Exxon to settle the claims in this ongoing matter.  On July 10, 2015, the settlement and comprised agreements were finalized and signed by the Plaintiffs and Exxon.  On July 28, 2015, the State of Louisiana issued a letter of no objection to the settlement.  In connection with the Business Combination, the liability was included in the distribution of our non-STACK assets to the AM Contributor.

On January 25, 2017, Bollenbach Enterprises Limited Partnership filed a class action petition in Kingfisher County, Oklahoma against Oklahoma Energy Acquisitions, LP and Alta Mesa Services, LP, each a wholly owned subsidiary, and us (collectively, the “AMH Parties”) claiming royalty underpayment or non-payment of royalty.  The suit alleged that the AMH Parties made improper post production deductions that resulted in underpayment of royalties on natural gas and/or constituents of the gas stream produced from wells.  The case was moved to federal court and stayed by the court pending the parties’ efforts to settle the case.  In June 2017, the court administratively closed the case following mediation.  As of December 31, 2017, we had accruals of approximately $4.7 million in accounts payable and accrued liabilities in our condensed consolidated balance sheets and in G&A in our condensed consolidated statements of operations as a result of this litigation.  During January 2018, approximately $4.7 million was paid to fund the settlement. On March 12, 2018, the class settlement was approved by the Court.  

Litigation (Successor). On March 1, 2017, Mustang Gas Products, LLC (“Mustang”) filed suit in the District Court of Kingfisher County, Oklahoma, against Oklahoma Energy Acquisitions, LP, and eight other entities, including us. Mustang alleges that (1) Mustang is a party to gas purchase agreements with Oklahoma Energy containing gas dedication covenants that burden land, leases and wells in Kingfisher County, Oklahoma, and (2) Oklahoma Energy, in concert with the other defendants, has wrongfully diverted gas sales to us in contravention of these agreements. Mustang asserts claims for declaratory judgment, anticipatory repudiation and breach of contract against Oklahoma Energy only. Mustang also claims tortious interference with contract, conspiracy and unjust enrichment/constructive trust against all defendants, including us. We believe that the allegations contained in this lawsuit are without merit and intend to vigorously defend ourselves.

Other contingencies. We are subject to legal proceedings, claims and liabilities arising in the ordinary course of business.  The outcomes cannot be reasonably estimated; however, in the opinion of management, such litigation and claims will be resolved without material adverse effect on our financial position, results of operations or cash flows. Accruals for losses associated with litigation are made when losses are deemed probable and can be reasonably estimated.

Performance appreciation rights.  In the third quarter of 2014, we adopted the Alta Mesa Holdings, LP Amended and Restated Performance Appreciation Rights Plan (the “Plan”), effective September 24, 2014.  The Plan was intended to provide incentive compensation to key employees and consultants who make significant contributions to the Company.  Under the Plan, participants were granted performance appreciation rights (“PARs”) with a stipulated initial designated value. The Company accelerated the vesting and payment of all outstanding PARs in connection with the Business Combination with AMR as described in Note

29

5.  The value of the PARs that vested was approximately $10.9 million and such amount was recorded in G&A in the Successor Period.  Following the closing of the Business Combination, the Plan was terminated.

Nonqualified Deferred Compensation.  In 2013, we established a nonqualified deferred compensation plan, the Alta Mesa Holdings, L.P. Supplemental Executive Retirement Plan (the “Retirement Plan”).  The Retirement Plan was intended to provide additional flexibility and tax planning advantages to our senior executives and other key highly compensated employees. In connection with the Business Combination, we terminated the Retirement Plan resulting in approximately $9.4 million being recorded in G&A in the Successor Period. 

NOTE 14 — SIGNIFICANT RISKS AND UNCERTAINTIES

Our business makes us vulnerable to changes in wellhead prices of oil and natural gas. Historically, world-wide oil and natural gas prices and markets have been volatile, and may continue to be volatile in the future. Prices for oil and natural gas can fluctuate widely in response to relatively minor changes in the global and regional supply of and demand for oil and natural gas, as well as market uncertainty, economic conditions and a variety of additional factors. The duration and magnitude of changes in oil and natural gas prices cannot be predicted. Declines in oil and/or natural gas prices or any other unfavorable market conditions could have a material adverse effect on our financial condition and on the carrying value of our proved oil and natural gas reserves. Low prices may also reduce our cash available for distribution, acquisitions and for servicing our indebtedness. We mitigate some of this vulnerability by entering into oil, natural gas, and natural gas liquids price derivative contracts. See Note 9 — Derivative Financial Instruments for further details on derivatives.

NOTE 15 — PARTNERS’ CAPITAL

Management and Control:   Our Seventh Amended and Restated Agreement of Limited Partnership (the “Seventh Amended Partnership Agreement”) currently provides for interests to be divided into economic units held by the partners referred to as “LP Units” and non-economic general partner interests owned by AMH GP referred to as “GP Units”.  AMH GP owns all the GP Units and in connection with the Business Combination, SRII Opco owns all the LP Units. 

As a limited partnership, our operations and activities are managed by the board of directors (the “Board of Directors”) of our general partner, AMH GP.  The limited liability company agreement of AMH GP provides for two classes of interests: (i) Class A Units, which hold 100% of the economic interests in AMH GP and (ii) Class B Units, which hold 100% of the voting interests in AMH GP.

SRII Opco is the sole owner of Class A Units and owns 90% of the Class B Units.  Harlan H. Chappelle, our Chief Executive Officer and a director, Michael Ellis, the founder, our Chief Operating Officer and a director and certain affiliates of Bayou City Energy Management, LLC, a Delaware limited liability company, and HPS Investment Partners, LLC, a Delaware limited liability company, own an aggregate 10% of the Class B Units.  AMH GP’s Board of Directors are selected by the Class B members.  Notwithstanding the foregoing, voting control of AMH GP is vested in SRII Opco pursuant to a voting agreement.

The Seventh Amended Partnership Agreement specifies the manner in which we will make cash distribution to our partners.  When AMH GP so directs, we shall make distributions of Net Cash Flow (as defined in the Seventh Amended Partnership Agreement) to the limited partner.

NOTE 16 — EQUITY-BASED COMPENSATION (Successor)

Following the closing of the Business Combination, AMR adopted the Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan (the “LTIP”).  A total of 50,000,000 shares of AMR’s Class A Common Stock were reserved for issuance under the LTIP.  The LTIP provides for the grant of stock options, including incentive stock options (“ISOs”), nonqualified stock options (“NSOs”), stock appreciation rights (“SARs”), restricted stock, dividend equivalents, restricted stock units (“RSUs”) and other stock-based awards in AMR’s Class A Common Stock.  Prior to the Business Combination, we did not have any equity-based compensation programs. Pursuant to the LTIP, certain grants of stock-based awards have been made to various employees of the Company since February 9, 2018.  During the Successor Period, we recognized non-cash stock-based compensation expense of $6.7 million resulting from stock options, restricted stock, and RSUs awards granted to our employees, which is included in general and administrative expense in the accompanying condensed consolidated statements of operations.  Historical amounts may not be representative of future amounts as the value of future awards may vary from historical amounts.

30

We recognize compensation expense on a straight-line basis for service-based grants to our employees over the vesting period.  The fair value of restricted stock awards and performance-based restricted stock units is determined based on the estimated fair market value of AMR’s Class A Common Stock on the date of grant. As provided in ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, the Company has elected to recognize actual forfeitures as they occur.

Stock options.  Options that have been granted under the LTIP expire seven years from the grant date and generally vest in one-third increments each year on the anniversary date following the date of grant, based on continued employment. The exercise price for an option granted under the LTIP may not be below the fair value of AMR’s Class A Common Stock on the grant date.  

Information about outstanding stock options is summarized in the table below:

໿

	Successor
	Stock Options		Weighted Average Grant - Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of February 9, 2018	—		$	—	—
Granted	4,704,433		4.45		—
Exercised	—		—		—
Forfeited or expired	(94,693	)	4.52		—
Outstanding as of September 30, 2018	4,609,740		$	4.44	6.4	$	—
Exercisable as of September 30, 2018	—		$	—	—	$	—

Compensation cost related to stock options is based on the grant-date fair value of the award, recognized ratably over the applicable three-year vesting period.  The Company estimates the fair value using the Black-Scholes option-pricing model. Expected volatilities are based on the re-levered asset volatility implied by a set of comparable companies.  Expected term is based on the simplified method, and is estimated as the average of the weighted average vesting term and the time to expiration as of the grant date.  The Company uses U.S. Treasury bond rates in effect at the grant date for its risk-free interest rates.

The following summarizes the assumptions used to determine the fair value of those options:

໿

	Successor
	February 9, 2018 Through September 30, 2018
Expected term (in years)	4.5
Expected stock volatility	64.6	%
Dividend yield	—
Risk-free interest rate	2.4	%

As of September 30, 2018, there was $16.2 million of unrecognized compensation cost related to non-vested stock options.  The Company expects to recognize that cost on a pro rata basis over a weighted average period of 2.4 years.

Restricted stock. Restricted stock granted to employees generally vests in one-third increments each year on the anniversary date following the date of grant, based on continued employment. Prior to vesting, no dividends are paid and the shares may not be traded.

31

The following table provides information about restricted stock awards granted during the Successor Period:

໿

	Successor
	Restricted Stock Awards		Weighted Average Grant Date Fair Value per share
Outstanding as of February 9, 2018	—		$	—
Granted	1,658,756		7.77
Vested	—		—
Forfeited or expired	(42,086	)	8.74
Outstanding as of September 30, 2018	1,616,670		$	7.75

Compensation cost for restricted shares is based upon the grant-date market value of the award, recognized ratably over the applicable three-year vesting period, subject to the employee’s continued service.  Unrecognized compensation cost related to unvested restricted shares at September 30, 2018 was $10.1 million, which the Company expects to recognize over a weighted average remaining period of 2.5 years.

Restricted stock units. The Company also grants performance-based restricted stock units (“PSUs”) to key employees under the LTIP. PSUs granted during the period will vest over three years at 20% during the first year, 30% during the second year and 50% during the third year. The number of PSUs vesting each year will be based on the achievement of annual company-specified performance goals and objectives applicable to each respective year of vesting. Based on achievement of those goals and objectives, the number of PSUs that vest can range from 0% to 200% of the target grant applicable to each vesting period. For accounting purposes, the Company will only recognize PSUs granted when the specified performance thresholds for future periods have been established. For PSUs granted during the period February 9, 2018 to September 30, 2018, only the performance goals and objectives for 2018 have been established to date. Those 2018 performance goals are related to the Company achieving a specified level of EBITDAX for the period ended December 31, 2018.

The following summary provides information about the target number of PSUs granted during the Successor Period:

	Successor
	PSUs			Weighted Average Grant - Date Fair Value per unit
Outstanding as of February 9, 2018	—			$	—
Granted	781,200			8.69
Vested	—			—
Forfeited or expired	(4,174	)		8.45
Outstanding as of September 30, 2018	777,026		—	$	8.69

As of September 30, 2018, there was no material unrecognized compensation cost related to the unvested PSUs.

NOTE 17 — RELATED PARTY TRANSACTIONS

On January 13, 2016, Alta Mesa’s wholly owned subsidiary Oklahoma Energy Acquisitions, LP (“Oklahoma Energy”) entered into a Joint Development Agreement, as amended on June 10, 2016 and December 31, 2016, (the “Joint Development Agreement”), with BCE-STACK Development LLC (“BCE”), a fund advised by Bayou City, to fund a portion of Alta Mesa’s drilling operations and to allow Alta Mesa to accelerate development of our STACK acreage.  The Joint Development Agreement, as amended, establishes a development plan of 60 wells in three tranches, and provides opportunities for the parties to potentially agree to an additional 20 wells. 

Pursuant to the terms and provisions of the Joint Development Agreement, BCE committed to fund 100% of Alta Mesa’s working interest share up to a maximum average well cost of $3.2 million in drilling and completion costs per well for any tranche, subject to modifications or adjustments proposed and approved by the parties. We are responsible for any drilling and completion costs exceeding approved amounts. In exchange for the payment of drilling and completion costs, BCE receives 80% of our working interest in each wellbore, which BCE interest will be reduced to 20% of our initial working interest upon BCE achieving a 15% internal rate of return on the wells within a tranche and automatically further reduced to 12.5% of our initial interest upon BCE achieving a 25% internal rate of return.  Following the completion of each joint well, Alta Mesa and BCE will each bear its

respective proportionate working interest share of all subsequent costs and expenses related to such joint well.  Mr. William McMullen, one of our former directors, is founder and managing partner of BCE. The approximate dollar value of the amount involved in this transaction, or Mr. McMullen’s interests in the transaction, depends on a number of factors outside his control and is not known at this time.  During the 2018 Predecessor Period, BCE advanced us approximately $39.5 million to drill wells under the Joint Development Agreement. As of September 30, 2018, 55 joint wells have been drilled or spudded. As of September 30, 2018 (Successor), and December 31, 2017 (Predecessor), $16.9 million and $23.4 million, respectively, of net advances remaining from BCE for their working interest share of the drilling and development costs arising under the Joint Development Agreement were included as “Advances from related party” in our consolidated balance sheets. BCE may request refunds of certain advances from time to time if funded wells previously on the drilling schedule were subsequently removed.

On August 31, 2015, Oklahoma Energy entered into a Crude Oil Gathering Agreement (the “Crude Oil Gathering Agreement”) and Gas Gathering and Processing Agreement (the “Gas Gathering and Processing Agreement”) with Kingfisher. The Gas Gathering and Processing Agreement was subsequently amended on February 3, 2017, effective as of December 1, 2016, and thereafter amended on June 29, 2018, effective as of April 1, 2018.  The recent amendment to the Gas Gathering and Processing Agreement impacts our net NGL production volumes but will not impact our consolidated financial statements.

Effective June 1, 2018, we entered into a Marketing Services Agreement with ARM Energy Management, LLC (“AEM”) pursuant to which AEM markets our oil, natural gas and natural gas liquids and sells them under short-term contracts generally with month-to-month pricing based on published regional indices, with differentials for transportation, location and quality taken into account. AEM remits monthly collections on these sales to us, and receives a marketing fee. In addition, AEM markets our firm transportation on the ONEOK Gas Transportation, L.L.C. system for an asset management fee. The AM Contributor owns less than 10% of AEM. For the period from June 1, 2018 to September 30, 2018, we paid AEM $0.8 million for our share of the marketing fees.

NOTE 18 — SUBSIDIARY GUARANTORS

All of our wholly owned subsidiaries are guarantors under the terms of the senior notes and the Eighth A&R credit facility. Our condensed consolidated financial statements reflect the financial position of these subsidiary guarantors. As the parent company to these subsidiaries, we have no independent operations, assets, or liabilities. The guarantees are full and unconditional (except for customary release provisions) and joint and several.  Those subsidiaries which are not wholly owned by us and are not guarantors of our senior notes or our credit facility, are immaterial subsidiaries.  There are no restrictions on dividends, distributions, loans or other transfers of funds from the subsidiary guarantors to us.

NOTE 19—SUBSEQUENT EVENTS

Sale of Produced Water Assets

Effective November 9, 2018, the Company sold its produced water assets, consisting of over 200 miles of produced water gathering pipelines, and related facilities and equipment, along with 20 produced water disposal wells, surface leases, easements and other agreements, net of related obligations, to a subsidiary of Kingfisher Midstream, LLC, a related party and wholly owned subsidiary of our parent, AMR, for a total purchase price of $90.0 million in cash, subject to normal acquisition adjustments. At

32

September 30, 2018, the net book value of long-lived assets associated with these operations totaled $86.9 million. In conjunction with the sale, the Company entered into a new fifteen-year water gathering and disposal agreement with Kingfisher Midstream.

ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis should be read in conjunction with the condensed consolidated financial statements and related notes included elsewhere in this report. In addition, such analysis should be read in conjunction with the consolidated financial statements and the related notes included in our Annual Report on Form 10-K for the year ended December 31, 2017 (“2017 Annual Report”).  The following discussion and analysis contains forward-looking statements that reflect our future plans, estimates, beliefs and expected performance. The forward-looking statements are dependent upon events, risks and uncertainties that may be outside our control. Our actual results could differ materially from those discussed in these forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, the volatility of oil and natural gas prices, production timing and volumes, estimates of proved reserves, operating costs and capital expenditures, economic and competitive conditions, regulatory changes and other uncertainties, as well as those factors discussed in “Cautionary Statement Regarding Forward-Looking Statements,” at the beginning of this Quarterly Report and in our 2017 Annual Report, particularly in the section titled “Risk Factors,” all of which are difficult to predict. As a result of these risks, uncertainties and assumptions, the forward-looking events discussed may not occur.

Overview

Alta Mesa Holdings, LP and its subsidiaries (“we,” “us,” “our,” the “Company,” and “Alta Mesa”) is an independent exploration and production company focused on the acquisition, development, exploration and exploitation of unconventional onshore oil and natural gas reserves in the eastern portion of the Anadarko Basin in Oklahoma. Our activities are primarily directed at the horizontal development of an oil and liquids-rich resource play in an area of the basin commonly referred to as the Sooner Trend Anadarko Basin Canadian and Kingfisher County (“STACK”). We maintain operational control of the majority of our properties, either through directly operating them or through operating arrangements with other interest owners.

As of September 30, 2018, we have assembled a highly contiguous position of approximately 134,000 net acres in the up-dip, naturally-fractured oil portion of the STACK, primarily in eastern Kingfisher County and Major County, Oklahoma. Our drilling locations primarily target the Osage, Meramec and Oswego formations. We continue to acquire acreage within and adjacent to our acreage footprint with the goal of operating the drilling, completion and production operations in such locations. At present, we are operating nine horizontal drilling rigs in the STACK.  

Additional information relating to the acquisition of Alta Mesa by Alta Mesa Resources, Inc. and certain other transactions that occurred on February 9, 2018, may be found in Note 5 — Business Combination of the Notes to Condensed Consolidated Financial Statements. Immediately prior to the closing of the business combination described in Note 5, we also distributed our non-STACK assets and related liabilities to High Mesa Holdings, LP (the “AM Contributor”), which is more fully described in Note 7 — Discontinued Operations (Predecessor) of the Notes to Condensed Consolidated Financial Statements, relating to discontinued operations.

Outlook, Market Conditions and Commodity Prices

Our revenue, profitability and future growth rate depend on many factors, particularly the prices of oil, natural gas and natural gas liquids, which are beyond our control.  The success of our business is significantly affected by the price of oil due to our current focus on development of oil reserves and exploration for oil.

33

Factors affecting oil prices include worldwide economic conditions; geopolitical activities in various regions of the world; worldwide supply and demand conditions; weather conditions; actions taken by the Organization of Petroleum Exporting Countries; and the value of the U.S. dollar in international currency markets. Commodity prices remain unpredictable and it is uncertain whether the increase in market prices experienced in recent months will be sustained.  As a result, we cannot accurately predict future commodity prices and, therefore, cannot determine with any degree of certainty what effect increases or decreases in these prices will have on our capital expenditures, production volumes or revenues.  If oil, natural gas and NGLs prices were to significantly decrease, such decreases could have a material adverse effect on our financial condition, the carrying value of our oil and natural gas properties, our proved reserves and our ability to finance operations, including the amount of our borrowing capacity under the Eighth A&R credit facility.  The following tables set forth the average New York Mercantile Exchange prices for oil and natural gas for the three and nine months ended September 30, 2018 and 2017:

	Three Months Ended September 30,
	2018		2017		Change			%
Average NYMEX daily prices:
Oil (per bbl)	$	69.43	$	48.20	$	21.23		44	%
Natural gas (per MMBtu)	$	2.87	$	2.95	$	(0.08	)	(3	)%

	Nine Months Ended September 30,
	2018		2017		Change			%
Average NYMEX daily prices:
Oil (per bbl)	$	66.73	$	49.36	$	17.37		35	%
Natural gas (per MMBtu)	$	2.85	$	3.05	$	(0.20	)	(7	)%

Our derivative contracts are reported at fair value on our condensed consolidated balance sheets and are sensitive to changes in the price of oil, natural gas and NGLs. Changes in our derivative assets and liabilities are reported in our condensed consolidated statements of operations as “Gain (loss) on derivative contracts”, which include both the non-cash increase or decrease in the fair value of derivative contracts, as well as the effect of cash settlements of derivative contracts during the period. For the three months ended September 30, 2018 (Successor), we recognized a net loss on our derivative contracts of $11.2 million, which includes $13.9 million in cash settlements paid for derivative contracts. We recognized a net loss on our derivative contracts of $63.1 million in the Successor Period, which includes $32.8 million in cash settlements paid for derivative contracts. The objective of our hedging program is to produce, over time, relative revenue stability. However, in the short term, both settlements and fair value changes in our derivative contracts can significantly impact our results of operations, and we expect these gains and losses to continue to reflect the impact of changes in oil and natural gas prices.

Operations Update

Our STACK properties consist largely of contiguous leased acreage in Kingfisher County and Major County, Oklahoma, which is the eastern portion of the Anadarko Basin referred to as the STACK.  This position is characterized by multiple productive zones located at total vertical depths between 4,000 feet and 8,000 feet.  The legacy operations within our acreage are primarily shallow-decline, long-lived oil fields developed on 80-acre vertical well spacing associated with waterfloods in the Oswego, Big Lime and Manning Limestones.  We continue to maintain production in these historical field pay zones. 

During the three months ended September 30, 2018, we brought 53 operated horizontal wells on production of which two were funded through our joint development agreement with BCE-STACK Development LLC (“BCE”).  We had 38 operated horizontal wells in progress as of September 30, 2018, of which three were funded through our joint development agreement with BCE.  As of November 1, 2018, 16 of the 38 operated horizontal wells in progress as of September 30, 2018 were on production. 

As of September 30, 2018, we had eight drilling rigs concurrently operating in the STACK focused on drilling wells targeting oil production and/or Company-owned saltwater disposal wells.  At the beginning of November 2018, we had nine drilling rigs operating in the STACK.  We plan to continue targeting the Mississippian-age Osage, Meramec, and Manning formations and the Pennsylvanian-age Oswego formation with horizontal drilling.  We will also participate in other horizontal wells as a non-operator, primarily targeting the Oswego Lime, Meramec and Osage formations. 

34

Production from our STACK assets was as follows:

	Successor		Predecessor		Successor		Predecessor
	Three		Three		February 9, 2018		January 1, 2018		Nine
	Months Ended		Months Ended		Through		Through		Months Ended
	September 30, 2018		September 30, 2017		September 30, 2018		February 8, 2018		September 30, 2017
Average, net to our interest (MBOE/d)	33.4		20.4		28.5		23.4		20.1
Percentage of oil	50	%	50	%	50	%	54	%	50	%
Percentage of NGLs	22	%	17	%	22	%	17	%	17	%
Percentage of oil and NGLs	72	%	67	%	72	%	71	%	67	%

As described in Note 19, onNovember 9, 2018, the Company sold its produced water assets, consisting of over 200 miles of produced water gathering pipelines, and related facilities and equipment, along with 20 produced water disposal wells, surface leases, easements and other agreements, net of related obligations, to a subsidiary of Kingfisher Midstream, LLC, a related party and wholly owned subsidiary of our parent, AMR, for a total purchase price of$90.0 million in cash, subject to normal acquisition adjustments. In conjunction with the sale, the Company entered into a new fifteen-year water gathering and disposal agreement with Kingfisher Midstream.

Results of Operations

For the Three Months Ended September 30, 2018 (Successor) Compared to Three Months Ended September 30, 2017 (Predecessor)

The tables included below set forth financial information for the three months ended September 30, 2018 (Successor) and September 30, 2017 (Predecessor).  The amounts below exclude operating results related to discontinued operations.

35

Revenues

Our oil, natural gas and NGLs revenues vary as a result of changes in commodity prices and production volumes. The following table summarizes our E&P revenues and production data for the periods presented:໿

໿

	Successor			Predecessor
	Three Months Ended September 30, 2018			Three Months Ended September 30, 2017
Net sales revenues (in thousands, except per unit data)
Oil sales	$	107,253		$	44,201
Natural gas sales	11,959			9,583
Natural gas liquids sales	13,880			7,548
Total net sales revenues	$	133,092		$	61,332
Net production:
Oil (Mbbls)	1,539			938
Natural gas (MMcf)	5,116			3,729
NGLs (Mbbls)	685			322
Total (MBoe)	3,077			1,881
Average net daily production volume:
Oil (Mbbls/d)	16.7			10.2
Natural gas (MMcf/d)	55.6			40.5
NGLs (Mbbls/d)	7.4			3.5
Total (MBoe/d)	33.4			20.4
Average sales prices:
Oil (per bbl)	$	69.67		$	47.15
Effect of derivative settlements on average price (per bbl)	(8.88		)	0.99
Oil, net of hedging (per bbl)	$	60.79		$	48.14
Percentage of unhedged realized oil price to NYMEX	100		%	98		%
Natural gas (per Mcf)	$	2.34		$	2.57
Effect of derivative settlements on average price (per Mcf)	(0.04		)	0.27
Natural gas, net of hedging (per Mcf)	$	2.30		$	2.84
Percentage of unhedged realized natural gas. price to NYMEX	82		%	87		%
Natural gas liquids (per bbl)	$	20.26		$	23.44
Effect of derivative settlements on average price (per bbl)	—			(1.24		)
Natural gas liquids, net of hedging (per bbl)	$	20.26		$	22.20
Percentage of unhedged realized oil price to NYMEX	29		%	49		%

Oil revenues were 81% and 72% of our total net sales revenues for the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), respectively. Oil revenues for the three months ended September 30, 2018 (Successor) increased approximately $63.1 million, or 143%, as compared to the three months ended September 30, 2017 (Predecessor) due to higher average prices and an increase in production. The higher average prices are tied to the overall increase in oil commodity prices as discussed above.  The increase in production for the three months ended September 30, 2018 (Successor) was due to an increase in wells drilled and new wells on production, as compared to the same period in 2017. Oil production was 50% and 50% of total BOE production volume for the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), respectively.

36

Natural gas revenues were 9% and 16% of our total net sales revenues for the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), respectively. Natural gas revenues for the three months ended September 30, 2018 (Successor) increased approximately $2.4 million, or 25%, as compared to September 30, 2017 (Predecessor) due to an increase in production, partially offset by lower average prices. Natural gas production was 28% and 33% of total BOE production volume for the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), respectively. The lower average prices are tied to the overall decrease in natural gas commodity prices as discussed above.

Natural gas liquids revenues were 10% and 12% of our total net sales revenues for the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), respectively. Natural gas liquids revenues for the three months ended September 30, 2018 (Successor) increased approximately $6.3 million, or 84%, as compared to September 30, 2017 (Predecessor) due to an increase in production, partially offset by lower prices. Natural gas liquids production was 22% and 17% of total BOE production volume for the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), respectively. The increase in production volume was primarily due to (i) increased BOE production of oil and natural gas and (ii) an amended contract, commencing in the second quarter of 2018, which allows for a greater recovery of ethane.  

Gain (loss) on derivative contracts presented in the table below represents cash settlements related to the commodity as well as fair value changes on our open oil, natural gas and natural gas liquids derivative contracts.  The changes in fair value resulted from new positions and settlements that occurred during each period, as well as the relationship between contract prices and the associated forward curves.

	Successor			Predecessor
	Three Months Ended September 30, 2018			Three Months Ended September 30, 2017
Gain (loss) on derivative contracts (in thousands):
Oil	$	(13,663	)	$	925
Natural gas	(204		)	994
Natural gas liquids	—			(398		)
Total cash settlements	(13,867		)	1,521
Valuation changes	2,655			(11,989		)
Total gain (loss) on derivative contracts	$	(11,212	)	$	(10,468	)

Operating Expenses

The following table summarizes selected operating expenses for the periods indicated:

໿

	Successor		Predecessor
	Three Months Ended September 30, 2018		Three Months Ended September 30, 2017
Operating expenses (in thousands, except per BOE data):
Lease operating expense	$	16,351	$	10,407
Marketing and transportation expense	15,820		8,314
Production taxes	6,311		1,262
Workover expense	1,065		1,441
Depreciation, depletion and amortization expense	45,623		24,159
Production cost per BOE:
Lease operating expense	$	5.31	$	5.53
Marketing and transportation expense	5.14		4.42
Production taxes	2.05		0.67
Workover expense	0.35		0.77
Depreciation, depletion and amortization expense	14.83		12.84

37

Lease operating expense primarily consists of costs related to compression, chemicals, fuel, power and water and associated labor. Lease operating expense for the three months ended September 30, 2018 (Successor) increased approximately $5.9 million, or 57%, as compared to the three months ended September 30, 2017 (Predecessor), primarily due to increased costs associated with salt water disposal and additional wells drilled. The decrease in cost per BOE was primarily due to increased NGL production resulting from higher plant recovery rates and from an amended contract which allows for a greater recovery of ethane, commencing in the second quarter of 2018. See Note 17 — Related Party Transactions for further detail. 

Marketing and transportation expense represents throughput for our properties in the STACK primarily at the Kingfisher processing facility. Marketing and transportation expense for the three months ended September 30, 2018 (Successor) increased approximately $7.5 million or 90%, as compared to September 30, 2017 (Predecessor), primarily due to higher volumes flowing from our operated wells into the Kingfisher plant. The fee we pay per unit reflects the firm processing capacity at the plant, as well as firm transport for our residue gas at the tailgate of the plant. 

Production taxes for the three months ended September 30, 2018 (Successor) increased approximately $5.0 million, or 400%, as compared to the three months ended September 30, 2017 (Predecessor), primarily due to an increase in oil and natural gas liquids revenue and an increase in the severance tax rate effective in the third quarter of 2018. 

Workover expenses associated with maintenance and remedial efforts to increase production decreased approximately $0.4 million during the three months ended September 30, 2018 (Successor), as compared to the three months ended September 30, 2017 (Predecessor), primarily due to the timing and extent of related projects during each period.

Depreciation, depletion and amortization expense was higher on a per BOE basis for the three months ended September 30, 2018 (Successor) as compared to the three months ended September 30, 2017 (Predecessor), primarily due to an increase in capital spending and in production in relation to current reserves.

໿

໿

	Successor			Predecessor
	Three Months Ended September 30, 2018			Three Months Ended September 30, 2017
Exploration expense (in thousands):
Geological and geophysical costs	$	947		$	1,203
Exploration expense	149			2,445
Loss on ARO settlement	(67		)	1
Total exploration expense	$	1,029		$	3,649

Exploration expense consists primarily of geological and geophysical personnel and data costs, lease rental expenses, expired leases, dry hole costs and settlements of asset retirement obligations (“ARO”) in excess of recorded estimates.  Total exploration expense decreased$2.6 million, primarily due to a decrease in expired leaseholds of $2.3 million that were recognized in the Predecessor period.

	Successor		Predecessor
	Three Months Ended September 30, 2018		Three Months Ended September 30, 2017
General and administrative expenses (in thousands):
Equity-based compensation expense	$	325	$	—
General and administrative expenses	7,593		17,445
Total general and administrative expenses	$	7,918	$	17,445

General and administrative expense(“G&A”). For the three months ended September 30, 2018 (Successor), G&A decreased approximately $9.5 million, or 55%, as compared to the three months ended September 30, 2017 (Predecessor), primarily due to (i) lower legal costs associated with a 2017 legal settlement of $4.7 million, (ii) lower costs related to non-recurring consulting fees attributable to the Contribution Agreement with SRII Opco of approximately $2.5 million incurred during the third quarter of 2017 and (iii) a reduction in employee incentive compensation expense during the three months ended September 30, 2018 as compared to the Predecessor Period.

38

Other Income (Expense)

	Successor		Predecessor
	Three Months Ended September 30, 2018		Three Months Ended September 30, 2017
Interest expense (in thousands):
Senior secured revolving credit facility	$	528	$	3,139
Senior unsecured notes	8,613		10,187
Other	1,867		219
Total interest expense	$	11,008	$	13,545

Interest expense.  For the three months ended September 30, 2018 (Successor), interest expense decreased$2.5 million, or 19%, as compared to the three months ended September 30, 2017 (Predecessor), primarily due to (i) lower interest on the Eighth A&R credit facility of $2.6 million, resulting from the repayment of our predecessor senior secured revolving credit facility in connection with the Business Combination, and (ii) bond premium amortization of $1.2 million. These decreases were partially offset by the increase in other interest expense of $1.2 million related our joint development agreement with BCE.

For the Periods from February 9, 2018 Through September 30, 2018 (Successor) and January 1, 2018 Through February 8, 2018 (Predecessor) Compared to the Nine Months Ended September 30, 2017 (Predecessor)

The tables included below set forth financial information for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period which are distinct reporting periods as a result of the Business Combination.  The amounts below exclude operating results related to discontinued operations.

39

Revenues

Our oil, natural gas and NGLs revenues vary as a result of changes in commodity prices and production volumes. The following table summarizes our revenues and production data for the periods presented:໿

໿

	Successor			Predecessor
	February 9, 2018 Through September 30, 2018			January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Net sales revenues (in thousands, except per unit data)
Oil sales	$	222,822		$	30,972		$	133,489
Natural gas sales	25,149			4,276			29,816
Natural gas liquids sales	28,835			4,000			21,201
Total net sales revenues	$	276,806		$	39,248		$	184,506
Net production:
Oil (Mbbls)	3,313			494			2,783
Natural gas (MMcf)	11,308			1,609			10,732
NGLs (Mbbls)	1,462			151			911
Total (MBoe)	6,660			914			5,483
Average net daily production volume:
Oil (Mbbls/d)	14.2			12.7			10.2
Natural gas (MMcf/d)	48.3			41.2			39.3
NGLs (Mbbls/d)	6.2			3.9			3.3
Total (MBoe/d)	28.5			23.4			20.1
Average sales prices:
Oil (per bbl)	$	67.26		$	62.68		$	47.97
Effect of derivative settlements on average price (per bbl)	(10.02		)	(6.44		)	0.30
Oil, net of hedging (per bbl)	$	57.24		$	56.24		$	48.27
Percentage of unhedged realized oil price to NYMEX	100		%	99		%	97		%
Natural gas (per Mcf)	$	2.22		$	2.66		$	2.78
Effect of derivative settlements on average price (per Mcf)	0.03			0.94			0.16
Natural gas, net of hedging (per Mcf)	$	2.25		$	3.60		$	2.94
Percentage of unhedged realized natural gas price to NYMEX	79		%	87		%	91		%
Natural gas liquids (per bbl)	$	19.72		$	26.41		$	23.27
Effect of derivative settlements on average price (per bbl)	—			—			(0.87		)
Natural gas liquids, net of hedging (per bbl)	$	19.72		$	26.41		$	22.40
Percentage of unhedged realized oil price to NYMEX	29		%	42		%	47		%

Oil revenues were 81%, 79% and 72% of our total net sales revenues for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively. Oil revenues for the Successor Period and the 2018 Predecessor Period increased compared to the 2017 Predecessor Period due to higher average prices and an increase in production in 2018. The higher average prices are tied to the overall increase in oil commodity prices as discussed above.  The increase in production in 2018 was due to an increase in wells drilled and new wells on production. Oil production was approximately 50%, 54% and 50% of total BOE production volume in the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively.

40

Natural gas revenues were 9%, 11% and 16% of our total net sales revenues for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively. Natural gas revenues for the Successor Period and the 2018 Predecessor Period decreased slightly compared to the 2017 Predecessor Period due to lower average prices, partially offset by an increase in production in 2018. The lower average prices are tied to the overall decrease in natural gas commodity prices as discussed above. Natural gas production was approximately 28%, 29% and 33% of total BOE production volume for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively.

Natural gas liquid revenues were 10%, 10% and 12% of our total net sales revenues for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively. Natural gas liquid revenues for the Successor Period and the 2018 Predecessor Period increased compared to the 2017 Predecessor Period due to an increase in production during the period, partially offset by lower average prices. Natural gas liquids production was approximately 22%, 17% and 17% of total BOE production volume for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively. The increase in production volume was primarily due to (i) increased BOE production of oil and natural gas and (ii) an amended contract, commencing in the second quarter of 2018, which allows for a greater recovery of ethane.  

Gain (loss) on sale of assets and other primarily includes a gain for the sale of seismic data totaling $5.9 million in the Successor Period.

Gain (loss) on derivative contracts presented in the table below represents cash settlements related to the commodity as well as fair value changes in our oil, natural gas and natural gas liquids derivative contracts.  The changes in fair value resulted from new positions and settlements that occurred during each period, as well as the relationship between contract prices and the associated forward curves.

	Successor			Predecessor
	February 9, 2018 Through September 30, 2018			January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Gain (loss) on derivative contracts (in thousands):
Oil	$	(33,190	)	$	(3,184	)	$	846
Natural gas	354			1,523			1,719
Natural gas liquids	—			—			(790		)
Total cash settlements	(32,836		)	(1,661		)	1,775
Valuation changes	(30,241		)	8,959			36,249
Total gain (loss) on derivative contracts	$	(63,077	)	$	7,298		$	38,024

41

Operating Expenses

The following table summarizes selected operating expenses for the periods indicated:

໿

	Successor		Predecessor
	February 9, 2018 Through September 30, 2018		January 1, 2018 Through February 8, 2018		Nine Months Ended September 30, 2017
Operating expenses (in thousands, except per BOE data):
Lease operating expense	$	37,347	$	4,485	$	32,897
Marketing and transportation expense	32,608		3,725		20,486
Production taxes	10,332		953		3,712
Workover expense	2,643		423		3,131
Depreciation, depletion and amortization expense	83,068		11,784		63,247
Production cost per BOE:
Lease operating expense	$	5.61	$	4.91	$	6.00
Marketing and transportation expense	4.90		4.08		3.74
Production taxes	1.55		1.04		0.68
Workover expense	0.40		0.46		0.57
Depreciation, depletion and amortization expense	12.47		12.89		11.54

Lease operating expense primarily consists of costs related to compression, chemicals, fuel, power and water and associated labor. Lease operating expense for the Successor Period and the 2018 Predecessor Period increased compared to the 2017 Predecessor Period due to increased costs associated with salt water disposal and additional wells drilled. The lease operating expense cost per BOE for the Successor Period and 2018 Predecessor Period was lower as compared to the 2017 Predecessor Period primarily due to increased NGL production resulting from higher BOE production of oil and natural gas and from an amended contract which allows for a greater recovery of ethane, commencing in the second quarter of 2018.  See Note 17 — Related Party Transactions for further detail. 

Marketing and transportation expense represents throughput for our properties in the STACK primarily at the Kingfisher processing facility. The increase is primarily due to higher volumes flowing from our operated wells into the Kingfisher plant. The fee we pay per unit reflects the firm processing capacity at the plant, as well as firm transport for our residue gas at the tailgate of the plant.

Production taxes for the Successor Period and 2018 Predecessor Period are higher as compared to the 2017 Predecessor Period primarily due to the increase in oil and natural gas liquids revenue and an increase in the severance tax rate effective in the third quarter of 2018. 

Workover expenses associated with maintenance and remedial efforts to increase production decreased slightly for the Successor Period and 2018 Predecessor Period, as compared to the 2017 Predecessor Period primarily due to the timing and extent of related projects during each period.

Depreciation, depletion and amortization expense was higher on a per BOE basis for the Successor Period as compared to the 2018 Predecessor Period and the 2017 Predecessor Period, primarily due to an increase in capital spending and in production in relation to current reserves.

໿

42

	Successor		Predecessor
	February 9, 2018 Through September 30, 2018		January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Exploration expense (in thousands):
Geological and geophysical costs	$	2,537	$	2,440		$	4,783
Exploratory dry hole costs	—		(45		)	—
Exploration expense	10,931		1,179			7,068
Loss on ARO settlements	599		59			37
Total exploration expense	$	14,067	$	3,633		$	11,888

Exploration expense consists primarily of geological and geophysical personnel and data costs, lease rental expenses, expired leases, dry hole costs and settlements of asset retirement obligations in excess of recorded estimates.  Total exploration expense for the Successor Period and the 2018 Predecessor Period increased compared to the 2017 Predecessor Period, primarily due to an increase in expired leaseholds of $5.2 million.

໿

	Successor		Predecessor
	February 9, 2018 Through September 30, 2018		January 1, 2018 Through February 8, 2018		Nine Months Ended September 30, 2017
General and administrative expense (in thousands):
Equity-based compensation expense	$	6,714	$	—	$	—
General and administrative expenses	50,474		24,352		35,474
Total general and administrative expenses	$	57,188	$	24,352	$	35,474

General and administrative expense includes non-cash charges for equity-based compensation awards in the Successor Period.  See Note 16 — Equity-Based Compensation (Successor) for further detail on equity-based compensation awards granted during the Successor Period. No such awards were made during the Predecessor Periods.  G&A expenses for the Successor Period and the 2018 Predecessor Period included $25.7 million and $17.0 million, respectively, of transaction expenses primarily attributable to the consummation of the Business Combination.

Other Income (Expense)

	Successor		Predecessor
	February 9, 2018 Through September 30, 2018		January 1, 2018 Through February 8, 2018		Nine Months Ended September 30, 2017
Interest expense (in thousands):
Senior secured revolving credit facility	$	608	$	867	$	6,880
Senior unsecured notes	22,148		3,399		30,534
Other	3,809		1,245		751
Total interest expense	$	26,565	$	5,511	$	38,165

Interest expense.  Interest expense in the Successor Period includes amortization of our deferred financing cost related to the Eighth A&R credit facility, interest on our senior unsecured notes, net of bond premium amortization of $3.3 million, and other interest, such as commitment fees and interest expense related our joint development agreement with BCE. The amounts outstanding under the previous revolving credit facility during the Predecessor Periods were repaid in full at the time of the Business Combination.

Liquidity and Capital Resources

Our principal requirements for capital are to fund our day-to-day operations, exploration and development activities, and to satisfy our contractual obligations, primarily for the payment of interest on our debt and any amounts owed during the period related to

43

our hedging positions. Our main sources of liquidity and capital resources come from cash flows generated from operations, borrowings under the Eighth A&R credit facility and capital contributions from our parent AMR.

Our future drilling plans, plans of our drilling operators and capital budgets are subject to change based upon various factors, some of which are beyond our control, including drilling results, oil and natural gas prices, the availability and cost of capital, drilling and production costs, availability of drilling services and equipment, actions of our operators, gathering system and pipeline transportation constraints and regulatory approvals. A deferral of planned capital expenditures, particularly with respect to drilling and completing new wells, could result in a reduction in anticipated production, revenues and cash flows. Additionally, if we curtail our drilling program, we may lose a portion of our acreage through lease expirations. However, since a large percentage of our acreage is held for production, we have the ability to materially increase or decrease our drilling and recompletion budget in response to market conditions with decreased risk of losing significant acreage. In addition, we may be required to reclassify some portion of our reserves currently booked as proved undeveloped reserves to no longer be considered proved reserves if such a deferral of planned capital expenditures means we will be unable to develop such reserves within five years of their initial booking.

We strive to maintain financial flexibility and may access the debt or equity capital markets as necessary to facilitate drilling on our large undeveloped acreage position and permit us to selectively expand our acreage position. In the event our cash flows are materially less than anticipated and other sources of capital we historically have utilized are not available on acceptable terms, we may curtail our capital spending.  

We expect to fund our capital budget for the remainder of 2018 predominantly with cash flows from operations, borrowings under the Eighth A&R credit facility and drilling and completion capital funded through our joint development agreement with BCE. As we execute our business strategy, we will continually monitor the capital resources available to meet future financial obligations and planned capital expenditures. We believe our cash flows provided by operating activities, cash on hand and availability under the Eighth A&R credit facility will provide us with the financial flexibility and wherewithal to meet our cash requirements, including normal operating needs, and to pursue our currently planned and future development activities. However, future cash flows are subject to a number of variables, including the level of oil and natural gas production and prices, and significant additional capital expenditures will be required to more fully develop our properties and acquire additional properties.  We cannot assure you that operations and other needed capital will be available on acceptable terms, or at all. 

Senior Unsecured Notes

We have $500 million in aggregate principal amount of 7.875% senior unsecured notes (the “senior notes”), which were issued at par by us and our wholly owned subsidiary Alta Mesa Finance Services Corp. during the fourth quarter of 2016.  The senior notes were issued in a private placement but were exchanged for substantially identical registered senior notes in November 2017.

The senior notes will mature on December 15, 2024, and interest is payable semi-annually on June 15 and December 15 of each year. As described further in Note 11 of the Notes to Condensed Consolidated Financial Statements, we may, from time to time, redeem certain amounts of the outstanding senior notes at specified amounts in relation to the principal balance of the notes redeemed.

As of September 30, 2018, we were in compliance with the indentures governing the senior notes.

Senior Secured Revolving Credit Facility

In connection with the consummation of the Business Combination, all indebtedness at that time under the senior secured revolving credit facility was repaid in full.  On February 9, 2018, we entered into the Eighth A&R credit facility with Wells Fargo Bank, National Association, as the administrative agent. The Eighth A&R credit facility, which will mature on February 9, 2023, is for an aggregate of $1.0 billion with a current borrowing base of $400.0 million. The Eighth A&R credit facility does not permit us to borrow funds if at the time of such borrowing we are not in compliance with the financial covenants set forth in the Eighth A&R credit facility. As of September 30, 2018, we have $80.0 million of borrowings under the Eighth A&R credit facility and have $21.9 million of outstanding letters of credit, leaving a total borrowing capacity of $298.1 million available for future use.

On November 13, 2018, the remaining amount available under the Eighth A&R credit facility totaled $270.1 million reflecting borrowings for capital spending and working capital needs, net of proceeds received from the sale of the produced water assets from the Company to a subsidiary of Kingfisher Midstream, LLC as described further in Note 19 of the Notes to Condensed Consolidated Financial Statements.

44

As of September 30, 2018, we were in compliance with the financial ratios specified in the Eight A&R credit facility.

Cash flow provided by operating activities

Cash provided by operating activities was $15.5 million, $26.5 million and $56.3 million for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively.  Cash-based items of net income (loss) including revenues (exclusive of unrealized commodity gains or losses), operating expenses and taxes, general and administrative expenses, and the cash portion of our interest expense were approximately $88.2 million, $(2.4) million, and $65.8 million for the Successor Period, 2018 Predecessor Period and the 2017 Predecessor Period, respectively.  Changes in working capital and other assets and liabilities resulted in a decrease in cash of $72.8 million and $9.5 million for the Successor Period and the 2017 Predecessor Period, respectively.  Changes in working capital and other assets and liabilities during the 2018 Predecessor Period resulted in an increase in cash of approximately $28.9 million.

Cash flow used in investing activities

Investing activities used cash for capital expenditures for property and equipment of approximately $489.0 million, $38.1 million and $244.3 million for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively. During the 2017 Predecessor Period, cash used for acquisitions totaled $55.2 million. Additionally, during the 2017 Predecessor Period, we entered into an interest bearing promissory note receivable with our affiliate Northwest Gas Processing, LLC for approximately $1.5 million.

Cash flow provided by financing activities

Cash provided by financing activities was $472.9 million, $16.9 million and $242.1 million for the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, respectively. The Successor Period included capital contributions totaling $560.3 million and proceeds from the issuance of long-term debt totaling $80.0 million, offset by repayments on the Alta Mesa senior secured revolving facility totaling $134.1 million, capital distribution of $32.0 million and incurred deferred financing costs of $1.4 million. The 2018 Predecessor Period included proceeds from the issuance of long-term debt totaling $60.0 million, offset by repayments of long-term debt totaling $43.0 million. The 2017 Predecessor Period included proceeds from the issuance of long-term debt totaling $286.1 million and capital contributions totaling $207.9 million, partially offset by repayments of long-term debt totaling $251.6 million.

45

ITEM 3. Quantitative and Qualitative Disclosures about Market Risk

For information regarding our exposure to certain market risks, see “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Risk Management Activities—Commodity Derivative Instruments” and “Item 7A. Quantitative and Qualitative Disclosures about Market Risk” in our 2017 Annual Report. There have been no material changes to the disclosure regarding market risks other than as noted below. See Part I, Item 1, Notes 8 and 9 to our condensed consolidated financial statements for a description of our outstanding derivative contracts at the most recent reporting date.

The fair value of our commodity derivative contracts at September 30, 2018 was a net liability of $41.5 million. A 10% increase or decrease in oil, natural gas and natural gas liquids prices with all other factors held constant would result in a decrease or increase, respectively, in the estimated fair value (generally correlated to our estimated future net cash flows from such instruments) of our commodity derivative contracts of approximately $27.6 million (decrease in value) or $31.2 million (increase in value), respectively, as of September 30, 2018.

We are subject to interest rate risk on our variable interest rate borrowings. Although in the past we have used interest rate swaps to mitigate the effect of fluctuating interest rates on interest expense, we currently have no open interest rate derivative contracts.  A 1% increase in interest rates would increase interest expense on our Eighth A&R credit facility by $0.8 million, based on the balance outstanding at September 30, 2018. 

ITEM 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

In accordance with Rules 13a-15 and 15d-15 under the Exchange Act, we carried out an evaluation, under the supervision and with the participation of management, including our Chief Executive Officer and our Chief Financial Officer, of the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report.  Based on that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of September 30, 2018 to provide reasonable assurance that information required to be disclosed in our reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Our disclosure controls and procedures include controls and procedures designed to ensure that information required to be disclosed in reports filed or submitted under the Exchange Act is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure.

Changes in Internal Control Over Financial Reporting

The internal controls over financial reporting that existed prior to the Business Combination were reviewed by management in anticipation of the Business Combination. Subsequent to the Business Combination, our parent company, AMR, has continued to analyze, evaluate and, where appropriate, make changes in controls and procedures in a manner commensurate with the size, complexity and scale of its operations subsequent to the Business Combination. Other than such changes and enhancements, there have been no material changes in our internal control over financial reporting during the three months ended September 30, 2018 that materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

PART II — OTHER INFORMATION

ITEM 1. Legal Proceedings

See Part I, Item 1, Note 13 — Commitments and Contingencies to our condensed consolidated financial statements, which is incorporated in this item by reference.

ITEM 1A. Risk Factors

We are subject to certain risks and hazards due to the nature of the business activities we conduct. For a discussion of these risks, see “Item 1A. Risk Factors” in the 2017 Annual Report. There have been no material changes with respect to the risk factors disclosed in the 2017 Annual Report during the quarter ended September 30, 2018.

ITEM 5. Other Information

On November 13, 2018, Michael A. McCabe, Chief Financial Officer and Assistant Secretary, announced his plans to retire following more than 12 years of service. Mr. McCabe will remain with the Company to help ensure an orderly transition until the earlier of March 31, 2019 or a date to be determined by the Company. In connection with his departure, the Company has entered into a Separation Agreement with Mr. McCabe pursuant to which he is entitled to (i) vesting acceleration for his outstanding awards under the Company’s 2018 Long-Term Incentive Plan, (ii) 150% of his base salary in effect on the separation date, (iii) 150% of the greater of (x) his target bonus or (y) the amount of bonus paid for the year immediately preceding the year containing the separation date, and (iv) a lump sum payment of approximately $117,000, in each case in exchange for certain waivers and releases for the Company’s benefit. Mr. McCabe will also receive certain other benefits, such as continued coverage pursuant to the consolidated omnibus budget reconciliation Act of 1985, as set forth in the separation agreement. These payments will be paid to Mr. McCabe upon his departure.

46

ITEM 6. Exhibits

3.1	Certificate of Limited Partnership of Alta Mesa Holdings, LP, dated September 26, 2005 (incorporated by reference from Exhibit 3.3 to Alta Mesa Holdings, LP’s Registration Statement on Form S-4 filed with the SEC on April 27, 2011 (File No. 333-173751)).
3.2	Seventh Amended and Restated Agreement of Limited Partnership of Alta Mesa Holdings, LP, dated as of February 9, 2018 (incorporated by reference from Exhibit 3.1 to Alta Mesa Holdings, LP’s Current Report on Form 8-K filed with the SEC on February 14, 2018 (File No. 333-173751)).
3.3	Articles of Organization of Alta Mesa Holdings GP, LLC, dated September 26, 2005 (incorporated by reference from Exhibit 3.1 to Alta Mesa Holdings, LP’s Registration Statement on Form S-4 filed with the SEC on April 27, 2011 (File No. 333-173751)).
3.4	Sixth Amended and Restated Limited Liability Company Agreement of Alta Mesa Holdings GP, LLC, dated February 9, 2018 (incorporated by reference from Exhibit 3.2 to Alta Mesa Holdings, LP’s Current Report on Form 8-K filed with the SEC on February 14, 2018 (File No. 333-173751)).
3.5	Certificate of Incorporation of Alta Mesa Finance Services Corp., dated September 27, 2010 (incorporated by reference from Exhibit 3.7 to Alta Mesa Holdings, LP’s Registration Statement on Form S-4 filed with the SEC on April 27, 2011 (File No. 333-173751)).
3.6	Bylaws of Alta Mesa Finance Services Corp., dated September 27, 2010 (incorporated by reference from Exhibit 3.8 to Alta Mesa Holdings, LP’s Registration Statement on Form S-4 filed with the SEC on April 27, 2011 (File No. 333-173751)).
4.3	Indenture, dated December 8, 2016, by and among Alta Mesa Holdings, LP, Alta Mesa Finance Services Corp,. the Subsidiary Guarantors named therein and U.S. Bank National Association, as trustee (incorporated by reference to Exhibit 4.1 to Alta Mesa Holdings, LP's current report on Form 8-K filed with the SEC on December 8, 2016 (File No. 333-173751).
10.1*	Master Assignment, Increase Agreement and Amendment No. 1 to Credit Agreement dated as of May 14, 2018 to the Eighth Amended and Restated Credit Agreement dated as of February 9, 2018, among Alta Mesa Holdings, LP, as borrower, Wells Fargo Bank, National Association, as administrative agent for the Lenders and as issuing Lender, the Lenders listed therein and Barclays Bank PLC.
10.2*	Amendment No. 2 to Credit Agreement dated as of August 13, 2018 to the Eighth Amended and Restated Credit Agreement dated as of February 9, 2018, among Alta Mesa Holdings, LP, as borrower, Wells Fargo Bank, National Association, as administrative agent for the Lenders and as issuing lender and the Lenders listed therein.
31.1*	Certification of the Company’s Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 7241).
31.2*	Certification of the Company’s Chief Financial Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 7241).
32.1*	Certification of the Company’s Chief Executive Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350).
32.2*	Certification of the Company’s Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350).
101*	Interactive data files.
* filed herewith.

47

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	ALTA MESA HOLDINGS, LP
	(Registrant)
	By:	ALTA MESA HOLDINGS GP, LLC, its
November 14, 2018		general partner
	By:	/s/ Harlan H. Chappelle
		Harlan H. Chappelle
		President and Chief Executive Officer
November 14, 2018
	By:	/s/ Michael A. McCabe
		Michael A. McCabe
		Vice President and Chief Financial Officer

48

EX-10.1

EXHIBIT 10.1

Execution Version

MASTER ASSIGNMENT, INCREASE AGREEMENT AND

AMENDMENT NO. 1 TO CREDIT AGREEMENT

This Master Assignment, Increase Agreement and Amendment No. 1 to Credit Agreement ("Agreement") dated as of May 14, 2018 ("Effective Date"), is among Alta Mesa Holdings, LP, a Texas limited partnership ("Borrower"), the Lenders (as defined below), Wells Fargo Bank, National Association, as administrative agent for the Lenders (as defined below) (in such capacity, the "Administrative Agent"), and as issuing lender (in such capacity, the "Issuing Lender"), and Barclays Bank PLC (the “New Lender”).

RECITALS

A.The Borrower is party to that certain Eighth Amended and Restated Credit Agreement dated as of February 9, 2018, among the Borrower, the lenders party thereto from time to time (the "Lenders"), the Administrative Agent and the Issuing Lender (the "Credit Agreement").

B.The parties hereto wish to increase the Borrowing Base under the Credit Agreement and in connection with such increase, the Assignors (as defined below) wish to assign a certain percentage of their rights and obligations under the Credit Agreement as a Lender to the Assignees (as defined below) pursuant to the terms hereof.

C.After the assignment and acceptance of the rights and obligations set forth herein have been made effective, the parties hereto agree to, subject to the terms and conditions set forth herein, (i) amend the Credit Agreement as provided herein and (ii) increase the Borrowing Base.

THEREFORE, the Borrower, the Lenders (including the New Lender), the Issuing Lender and the Administrative Agent hereby agree as follows:

Section 1.Defined Terms; Interpretation. As used in this Agreement, each of the terms defined in the opening paragraph and the Recitals above shall have the meanings assigned to such terms therein. Each term defined in the Credit Agreement and used herein without definition shall have the meaning assigned to such term in the Credit Agreement, as amended by this Agreement, unless expressly provided to the contrary. The words "hereby", "herein", "hereinafter", "hereof", "hereto" and "hereunder" when used in this Agreement shall refer to this Agreement as a whole and not to any particular Article, Section, subsection or provision of this Agreement. Article, Section, subsection and Exhibit references herein are to such Articles, Sections, subsections and Exhibits of this Agreement unless otherwise specified. All titles or headings to Articles, Sections, subsections or other divisions of this Agreement or the exhibits hereto, if any, are only for the convenience of the parties and shall not be construed to have any effect or meaning with respect to the other content of such Articles, Sections, subsections, other divisions or exhibits, such other content being controlling as the agreement among the parties hereto. Whenever the context requires, reference herein made to the single number shall be understood to include the plural; and likewise, the plural shall be understood to include the singular. Words denoting sex shall be construed to include the masculine, feminine and neuter, when such construction is appropriate; and specific enumeration shall not exclude the general but shall be construed as cumulative. Definitions of terms defined in the singular or plural shall be equally applicable to the plural or singular, as the case may be, unless otherwise indicated.

Section 2.Assignments and Acceptances. In lieu of executing and delivering an Assignment and Acceptance, each existing Lender whose Pro Rata Share of the Commitments is decreasing in connection herewith (each an “Assignor” and, collectively, the “Assignors”) and each existing Lender whose Pro Rata Share of the Commitments is increasing in connection herewith (collectively, the “Increasing Existing Lenders”; and together with the Assignors, collectively, the “Existing Lenders”; and the Increasing Existing Lenders together with the New Lender, each an “Assignee” and, collectively, the “Assignees”) hereby agree to, and Borrower hereby accepts, the following:

1

#5701439

(a)Assignment. For an agreed consideration, each Assignor hereby irrevocably sells and assigns to the respective Assignees, and each Assignee hereby irrevocably purchases and assumes from the respective Assignors, subject to and in accordance with the terms hereof and the Credit Agreement, as of the Effective Date (i) such percentage in and to all of the respective Assignors’ rights and obligations in their respective capacities as Lenders under the Credit Agreement and any other documents or instruments delivered pursuant thereto to the extent related to the amount and percentage interest identified in Schedule II hereto that would result in Assignors and Assignees having the respective Commitments, and the corresponding Maximum Credit Amounts and Elected Commitment Amounts, as set forth in Schedule II attached hereto (including without limitation any letters of credit and guaranties provided in connection with the Credit Agreement), and (ii) to the extent permitted to be assigned under applicable law, all claims, suits, causes of action and any other right of the respective Assignors (in their respective capacities as Lenders) against any Person, whether known or unknown, arising under or in connection with the Credit Agreement, any other documents or instruments delivered pursuant thereto or the loan transactions governed thereby or in any way based on or related to any of the foregoing, including, but not limited to, contract claims, tort claims, malpractice claims, statutory claims and all other claims at law or in equity related to, and in proportion to, the rights and obligations sold and assigned pursuant to clause (i) above (the rights and obligations sold and assigned by any Assignor to any Assignee pursuant to clauses (i) and (ii) above being referred to herein collectively as an "Assigned Interest"). Each such sale and assignment is without recourse to any Assignor and, except as expressly provided in this Agreement, without representation or warranty by any Assignor.

(b)Representations and Warranties of Assignor. Each Assignor (i) represents and warrants that (A) it is the legal and beneficial owner of the relevant Assigned Interest, (B) such Assigned Interest is free and clear of any lien, encumbrance or other adverse claim, and (C) it has full power and authority, and has taken all action necessary, to execute and deliver this Agreement and to consummate the transactions contemplated hereby; and (ii) assumes no responsibility with respect to (A) any statements, warranties or representations made in or in connection with the Credit Agreement or any other Loan Document, (B) the execution, legality, validity, enforceability, genuineness, sufficiency or value of the Loan Documents or any collateral thereunder, (C) the financial condition of the Borrower, its Subsidiaries or Affiliates or any other Person obligated in respect of any Loan Document or (D) the performance or observance by the Borrower, its Subsidiaries or Affiliates or any other Person of any of its obligations under any Loan Document.

(c)Representations and Warranties of Assignee. Each Assignee (i) represents and warrants that (A) it has full power and authority, and has taken all action necessary, to execute and deliver this Agreement and to consummate the transactions contemplated hereby and to become a Lender under the Credit Agreement, (B) it meets all the requirements to be an assignee under Section 9.06 of the Credit Agreement (subject to such consents, if any, as may be required under Section 9.06 of the Credit Agreement), (C) from and after the Effective Date, it shall be bound by the provisions of the Credit Agreement as a Lender thereunder and, to the extent of the relevant Assigned Interest, shall have the obligations of a Lender thereunder, (D) it is sophisticated with respect to decisions to acquire assets of the type represented by the Assigned Interest and either it, or the person exercising discretion in making its decision to acquire the Assigned Interest, is experienced in acquiring assets of such type, (E) it has received a copy of the Credit Agreement and has received or has been accorded the opportunity to receive copies of the most recent financial statements delivered pursuant to Section 5.06 thereof, and such other documents and information as it deems appropriate to make its own credit analysis and decision to enter into this Agreement and to purchase such Assigned Interest, (F) it has, independently and without reliance upon the Administrative Agent or any Lender and based on such documents and information as it has deemed appropriate, made its own credit analysis and decision to enter into this Agreement and to purchase such Assigned Interest, and (G) if it is not incorporated under the laws of the United States of America or a state thereof, on or prior to the date hereof, it has delivered to Administrative Agent any documentation required to be delivered by it pursuant to the terms of the Credit Agreement, duly completed and executed by such Assignee; and (ii) agrees that (A) it will, independently and without reliance on the Administrative Agent, any Assignor, or any other Lenders, and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions in taking or not taking action under the Loan Documents, and (B) it will perform in accordance with their terms all of the obligations which by the terms of the Loan Documents are required to be performed by it as a Lender.

2

#5701439

(d)Payments. From and after the Effective Date, Administrative Agent shall make all payments in respect of each Assigned Interest (including payments of principal, interest, fees and other amounts) to the relevant Assignee whether such amounts have accrued prior to, on or after the Effective Date. The Assignors and Assignees shall make all appropriate adjustments in payments by Administrative Agent for periods prior to the Effective Date or with respect to the making of this assignment directly between themselves.

(e)Consent; Waiver of Administrative Fees. Administrative Agent, the Issuing Lender and Borrower hereby consent to each Assignor’s assignment of the Assigned Interests to the respective Assignees, and waive any other conditions to the effectiveness of such assignment that are not expressly set forth in this Agreement, and agree that the terms of this Agreement shall constitute an Assignment and Acceptance. Administrative Agent hereby consents to a one-time waiver of the $5,000 administrative fees that would otherwise be payable by each Assignee pursuant to Section 9.06(b)(iv) of the Credit Agreement as a result of the assignment provided for herein.

(f)Letters of Credit. On the Effective Date, after giving effect to the assignment made pursuant to Section 2 above and the increase in the Borrowing Base set forth in this Section 3, each Lender's share of the applicable Letter of Credit Exposure on the Effective Date shall automatically be deemed to equal such Lender's Pro Rata Share of such Letter of Credit Obligations (such Pro Rata Share for such Lender to be determined as of Effective Date after giving effect to increase in the Borrowing Base, Elected Commitment Amounts and assignments effected hereby) without further action by any party.

Section 3.Agreement - Increase in Borrowing Base. Subject to the terms of this Agreement, as of the Effective Date, the Borrowing Base shall be increased to $400,000,000 (which reflects an increase of $50,000,000 (the “Increase Amount”)). Such new Borrowing Base shall, unless otherwise adjusted in accordance with the terms of the Credit Agreement, remain in effect at that level until the effective date of the next Borrowing Base redetermination made in accordance with the Credit Agreement, as amended hereby. The parties hereto acknowledge and agree that the Borrowing Base redetermination set forth in this Section 3 shall be deemed to be the redetermination provided for in Section 2.02(b)(i) of the Credit Agreement and scheduled for April 1, 2018. Each Lender's Pro Rata Share of the resulting Borrowing Base and each Lender’s Elected Commitment Amount, after giving effect to the assignment made pursuant to Section 2 above and the increase in the Borrowing Base set forth in this Section 3, are as set forth next to its name in Schedule II attached hereto.

Section 4.Amendments to Credit Agreement.

(a)Section 1.01 of the Credit Agreement (Certain Defined Terms) is amended by replacing the definition of “Fee Letters” in its entirety with the following:

"Fee Letters" means (a) that certain amended and restated engagement and fee letter agreement dated January 26, 2018 from Wells Fargo Securities, LLC to the Borrower, (b) that certain administrative agent fee letter agreement dated January 26, 2018 from Wells Fargo Bank to the Borrower, and (c) that certain fee letter agreement dated May 14, 2018 from Wells Fargo Securities, LLC to the Borrower.

(b)Schedule II to the Credit Agreement (Notice Information and Commitments) is hereby deleted and replaced in its entirety with Schedule II attached hereto.

Section 5.Representations and Warranties. Each Loan Party represents and warrants that: (a) after giving effect to this Agreement, the representations and warranties contained in the Credit Agreement and the representations and warranties contained in the other Loan Documents are true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof) on and as of the date hereof except to the extent that any such representation or warranty expressly relates solely to an earlier date, in which case it shall have been true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof) as of such earlier date; (b) before and after giving effect to this Agreement, no Default has occurred and is continuing; (c) the execution, delivery and performance of this Agreement are within the corporate or limited liability company power and authority of such Loan Party, as applicable, and have been duly authorized by appropriate corporate or limited liability company action and proceedings, as applicable; (d) this Agreement constitutes the legal, valid, and binding obligation of such Loan Party enforceable in accordance with its terms, except as limited by applicable bankruptcy, insolvency, reorganization, moratorium, or

3

#5701439

similar laws affecting the rights of creditors generally and general principles of equity; and (e) there are no governmental or other third party consents, licenses and approvals required in connection with the execution, delivery, performance, validity and enforceability of this Agreement.

Section 6.Conditions to Effectiveness. This Agreement and the amendments provided herein shall become effective and enforceable against the parties hereto upon the occurrence of the following conditions precedent:

(a)Administrative Agent shall have received multiple original counterparts, as requested by Administrative Agent, of the following, duly and validly executed and delivered by duly authorized officers of the parties thereto:

(i)this Agreement;

(ii)Notes payable to the Assignees to the extent requested by such Assignees; and

(iii)fee letter dated the date hereof between the Arranger and the Borrower.

(b)Borrower shall have paid (i) the fees required under the fee letter referred to in Section 6(a)(iii) above, and (ii) all fees and expenses of the Administrative Agent's outside legal counsel and other consultants pursuant to all invoices presented for payment on or prior to the Effective Date.

Section 7.Effect on Loan Documents; Acknowledgments; Agreements.

(a)The Borrower and each Guarantor acknowledges that on the date hereof all outstanding Obligations are payable in accordance with their terms and the Borrower and each Guarantor hereby waives any defense, offset, counterclaim or recoupment with respect thereto.

(b)The Administrative Agent, the Issuing Lender, and the Lenders hereby expressly reserve all of their rights, remedies, and claims under the Loan Documents. Nothing in this Agreement shall constitute a waiver or relinquishment of (i) any Default or Event of Default under any of the Loan Documents, (ii) any of the agreements, terms or conditions contained in any of the Loan Documents, (iii) any rights or remedies of the Administrative Agent, the Issuing Lender, or any Lender with respect to the Loan Documents, or (iv) the rights of the Administrative Agent, the Issuing Lender, or any Lender to collect the full amounts owing to them under the Loan Documents.

(c)Each of the Borrower, the Administrative Agent, the Issuing Lender, and the Lenders does hereby adopt, ratify, and confirm the Credit Agreement, as amended hereby, and acknowledges and agrees that the Credit Agreement, as amended hereby, and all other Loan Documents are and remain in full force and effect, and the Borrower acknowledges and agrees that its liabilities under the Credit Agreement, as amended hereby, and the other Loan Documents are not impaired in any respect by this Agreement.

(d)From and after the Effective Date, all references to the Credit Agreement and the Loan Documents shall mean such Credit Agreement and such Loan Documents as amended prior hereto as described in the recitals, and by this Agreement.

(e)This Agreement is a Loan Document for the purposes of the provisions of the other Loan Documents. Without limiting the foregoing, any breach of representations, warranties, and covenants under this Agreement shall be a Default or Event of Default, as applicable, under the Credit Agreement.

(f)At the sole discretion of the Arranger, all or any portion of any fees paid to the Arranger may be allocated to any affiliate thereof or paid to any other Lender or Lenders.

Section 8.Reaffirmation of the Guaranty. Each Guarantor hereby ratifies, confirms, acknowledges and agrees that its obligations under its respective Guaranty are in full force and effect and that such Guarantor continues to unconditionally and irrevocably guarantee the full and punctual payment, when due, whether at stated maturity or earlier by acceleration or otherwise, of all of the Guaranteed Obligations (as defined in such Guaranty), as such Guaranteed Obligations may have been amended by this Agreement, and its execution and delivery of this Agreement does not indicate or establish an approval or consent requirement by such Guarantor under its respective Guaranty in connection with the execution and delivery of amendments, consents or waivers to the Credit Agreement, the Notes or any of the other Loan Documents.

4

#5701439

Section 9.Reaffirmation of Security Documents. Each Loan Party (a) represents and warrants that it has no defenses to the enforceability of any Security Instrument, (b) reaffirms the terms of and its obligations (and the security interests granted by it) under each Security Instrument, and agrees that each such Security Instrument will continue in full force and effect to secure the Obligations as the same may be amended, supplemented, or otherwise modified from time to time, and (c) acknowledges, represents, warrants and agrees that the Liens and security interests granted by it pursuant to the Security Instruments are valid and subsisting and create a security interest to secure the Obligations.

Section 10.Counterparts. This Agreement may be signed in any number of counterparts, each of which shall be an original and all of which, taken together, constitute a single instrument. This Agreement may be executed by facsimile or email (i.e., PDF) signature and all such signatures shall be effective as originals.

Section 11.Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the Borrower, Holdings, the Lenders, the Issuing Lender, and the Administrative Agent and their respective successors and assigns permitted pursuant to the Credit Agreement.

Section 12.Invalidity. In the event that any one or more of the provisions contained in this Agreement shall for any reason be held invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect any other provision of this Agreement.

Section 13.Governing Law. This Agreement and any claim, controversy, dispute or cause of action (whether in contract or tort or otherwise) based upon, arising out of or relating to this Agreement and the transactions contemplated hereby shall be governed by, and construed in accordance with, the law of the State of New York (including Section 5-1401 and Section 5-1402 of the General Obligations Law of the State of New York), without reference to any other conflicts or choice of law principles thereof.

Section 14.WAIVER OF JURY TRIAL. EACH LOAN PARTY, THE LENDERS, THE ISSUING LENDER AND THE ADMINISTRATIVE AGENT EACH HEREBY ACKNOWLEDGES THAT IT HAS BEEN REPRESENTED BY AND IT HAS CONSULTED WITH COUNSEL OF ITS CHOICE, AND EACH HEREBY KNOWINGLY, VOLUNTARILY, INTENTIONALLY, AND IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN RESPECT OF ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREBY.

Section 15.Entire Agreement. This AGREEMENT, the Credit Agreement, as amended by This AGREEMENT, the Notes, and the other Loan Documents constitute the entire understanding among the parties hereto with respect to the subject matter hereof and supersede any prior agreements, written or oral, with respect thereto.

[The remainder of this page has been left blank intentionally.]

5

#5701439

Execution Version

EXECUTED effective as of the date first above written.

BORROWER:

ALTA MESA HOLDINGS, LP

By: Alta Mesa Holdings GP, LLC,

its general partner

By: /s/ Michael A. McCabe

Michael A. McCabe

Chief Financial Officer

GUARANTORS:

ALTA MESA HOLDINGS GP, LLC

By: /s/ Michael E. Ellis

Name: Michael E. Ellis

Title: Chief Operating Officer

ALTA MESA FINANCE SERVICES CORP.

By: /s/ Michael E. Ellis

Name: Michael E. Ellis

Title: Chief Operating Officer

OEM GP, LLC

By: /s/ Michael E. Ellis

Name: Michael E. Ellis

Title: Chief Operating Officer

ALTA MESA SERVICES, LP

OKLAHOMA ENERGY ACQUISITIONS, LP

Each By: OEM GP, LLC, its general partner

By: /s/ Michael E. Ellis

Name: Michael E. Ellis

Title: Chief Operating Officer

Schedule II - Page 1

#5701439

ADMINISTRATIVE AGENT/ ISSUING LENDER/ EXISTING LENDER:

WELLS FARGO BANK, NATIONAL ASSOCIATION,

as Administrative Agent, Issuing Lender, and Lender

By: /s/ Michael Real

Name: Michael Real

Title: Director

Schedule II - Page 2

#5701439

EXISTING LENDERS:

TORONTO DOMINION (NEW YORK) LLC

By: /s/ Savo Bozic

Name: Savo Bozic

Title: Authorized Signatory

Schedule II - Page 3

#5701439

ING CAPITAL LLC

By: /s/ Josh Strong

Name: Josh Strong

Title: Director

By: /s/ Charles Hall

Name: Charles Hall

.

Title: Managing Director

Schedule II - Page 4

#5701439

CITIBANK, N.A.

By: /s/ William McNeely

Name: William McNeely

Title: Senior Vice President

Schedule II - Page 5

#5701439

Capital One, NATIONAL ASSOCIATION

By: /s/ Michael Higgins

Name: Michael Higgins

Title: Senior Director

Schedule II - Page 6

#5701439

BOKF, NA dba Bank of Texas

By: /s/ Martin W. Wilson

Name: Martin W. Wilson

Title: Senior Vice President

Schedule II - Page 7

#5701439

NATIXIS, NEW YORK BRANCH

By: /s/ Carlos Quinteros

Name: Carlos Quinteros

Title: Managing Director

By: /s/ Arnaud Roberdet

Name: Arnaud Roberdet

Title: Vice President

Schedule II - Page 8

#5701439

MORGAN STANLEY BANK, N.A.

By: /s/ Michael King

Name: Michael King

Title: Authorized Signatory

Schedule II - Page 9

#5701439

MORGAN STANLEY SENIOR FUNDING, INC.

By: /s/ Michael King

Name: Michael King

Title: Authorized Signatory

Schedule II - Page 10

#5701439

NEW LENDER:

BARCLAYS BANK PLC

By: /s/ Sydney G. Dennis

Name: Sydney G. Dennis

Title: Director

Schedule II - Page 11

#5701439

EX-10.2

EXHIBIT 10.2

Executed Version

AMENDMENT NO. 2 TO CREDIT AGREEMENT

This Amendment No. 2 to Credit Agreement ("Agreement") dated as of August 13, 2018 ("Effective Date"), is among Alta Mesa Holdings, LP, a Texas limited partnership ("Borrower"), the Lenders (as defined below), Wells Fargo Bank, National Association, as administrative agent for the Lenders (as defined below) (in such capacity, the "Administrative Agent"), and as issuing lender (in such capacity, the "Issuing Lender").

RECITALS

A.The Borrower is party to that certain Eighth Amended and Restated Credit Agreement dated as of February 9, 2018, among the Borrower, the lenders party thereto from time to time (the "Lenders"), the Administrative Agent and the Issuing Lender, as heretofore amended (as so amended, the "Credit Agreement").

B.The parties hereto agree to, subject to the terms and conditions set forth herein, amend the Credit Agreement as provided herein.

THEREFORE, the Borrower, the Lenders, the Issuing Lender and the Administrative Agent hereby agree as follows:

Section 1.Defined Terms; Interpretation. As used in this Agreement, each of the terms defined in the opening paragraph and the Recitals above shall have the meanings assigned to such terms therein. Each term defined in the Credit Agreement and used herein without definition shall have the meaning assigned to such term in the Credit Agreement, as amended by this Agreement, unless expressly provided to the contrary. The words "hereby", "herein", "hereinafter", "hereof", "hereto" and "hereunder" when used in this Agreement shall refer to this Agreement as a whole and not to any particular Article, Section, subsection or provision of this Agreement. Article, Section, subsection and Exhibit references herein are to such Articles, Sections, subsections and Exhibits of this Agreement unless otherwise specified. All titles or headings to Articles, Sections, subsections or other divisions of this Agreement or the exhibits hereto, if any, are only for the convenience of the parties and shall not be construed to have any effect or meaning with respect to the other content of such Articles, Sections, subsections, other divisions or exhibits, such other content being controlling as the agreement among the parties hereto. Whenever the context requires, reference herein made to the single number shall be understood to include the plural; and likewise, the plural shall be understood to include the singular. Words denoting sex shall be construed to include the masculine, feminine and neuter, when such construction is appropriate; and specific enumeration shall not exclude the general but shall be construed as cumulative. Definitions of terms defined in the singular or plural shall be equally applicable to the plural or singular, as the case may be, unless otherwise indicated.

Section 2.Amendments to Credit Agreement.

(a)Section 1.01 of the Credit Agreement (Certain Defined Terms) is hereby amended by (i) deleting the definition of “Excess Cash Flow” in its entirety, and (ii) adding the following new defined term to appear in alphabetical order therein:

“Restricted Payment Leverage Ratio” means, for purposes of determining whether a Restricted Payment is permitted under Section 6.05 in any Payment Period following a Subject Quarter, the ratio of (a) all Debt (other than obligations under Hedge Contracts) of the Borrower and its Restricted Subsidiaries as of the date such Restricted Payment is made (including the Debt, if any, incurred to make such Restricted Payment) to (b) Adjusted EBITDAX for such Subject Quarter.

1

(b)Section 6.05 of the Credit Agreement (Restricted Payments) is hereby amended by replacing clause (b) therein in its entirety with the following:

“(b)if the Borrower has delivered the required financial statements, Compliance Certificate and other items required under Section 5.06(a) or (b) for a fiscal quarter end (the "Subject Quarter"), commencing with the fiscal quarter ending June 30, 2018, the Borrower may make cash Restricted Payments in the period from the time such last item is delivered to the date the Borrower is required to deliver financial statements, Compliance Certificate and other items under Section 5.06(a) or (b) for the subsequent fiscal quarter end (the “Payment Period”) so long as: (i) the aggregate amount of Restricted Payments (includingsuch Restricted Payment, and for the avoidance of doubt, including the Restricted Payments permitted in the following proviso) made in any fiscal year and permitted under this clause (b) shall not exceed $75,000,000 in the aggregate, (ii) both before and after giving effect to the making of such Restricted Payment, no Default has occurred and is continuing, (iii) subject to the following proviso, both before and after giving effect to the making of such Restricted Payment, the Restricted Payment Leverage Ratio shall be less than 3.00 to 1.00, and (iv) both before and after giving effect to the making of such Restricted Payment, the aggregate Unused Commitment Amounts are equal to or greater than 20% of the aggregate Commitments; provided however, the Borrower may make cash Restricted Payments in the Payment Period immediately following the Subject Quarter ended June 30, 2018 in an aggregate amount up to $25,000,000 so long as (x) before and after giving effect to the making of such Restricted Payment, the Restricted Payment Leverage Ratio shall be less than 3.50 to 1.00, and (y) all other conditions in the preceding clauses (i), (ii) and (iv) have been met as to such Restricted Payment; ”

(c)Exhibit B - Form of Compliance Certificate attached to the Credit Agreement is hereby replaced in its entirety with Exhibit B - Form of Compliance Certificate attached hereto.

Section 3.Representations and Warranties. Each Loan Party represents and warrants that: (a) after giving effect to this Agreement, the representations and warranties contained in the Credit Agreement and the representations and warranties contained in the other Loan Documents are true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof) on and as of the date hereof except to the extent that any such representation or warranty expressly relates solely to an earlier date, in which case it shall have been true and correct in all material respects (except that such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof) as of such earlier date; (b) before and after giving effect to this Agreement, no Default has occurred and is continuing; (c) the execution, delivery and performance of this Agreement are within the corporate or limited liability company power and authority of such Loan Party, as applicable, and have been duly authorized by appropriate corporate or limited liability company action and proceedings, as applicable; (d) this Agreement constitutes the legal, valid, and binding obligation of such Loan Party enforceable in accordance with its terms, except as limited by applicable bankruptcy, insolvency, reorganization, moratorium, or similar laws affecting the rights of creditors generally and general principles of equity; and (e) there are no governmental or other third party consents, licenses and approvals required in connection with the execution, delivery, performance, validity and enforceability of this Agreement.

Section 4.Conditions to Effectiveness. This Agreement and the amendments provided herein shall become effective and enforceable against the parties hereto upon the occurrence of the following conditions precedent:

(a)Administrative Agent shall have received multiple original counterparts, as requested by Administrative Agent, of this Agreement, duly and validly executed and delivered by duly authorized officers of the Borrower, the Guarantors and the Majority Lenders, and

(b)Borrower shall have paid all fees and expenses of the Administrative Agent's outside legal counsel and other consultants pursuant to all invoices presented for payment on or prior to the Effective Date.

2

Section 5.Effect on Loan Documents; Acknowledgments; Agreements.

(a)The Borrower and each Guarantor acknowledges that on the date hereof all outstanding Obligations are payable in accordance with their terms and the Borrower and each Guarantor hereby waives any defense, offset, counterclaim or recoupment with respect thereto.

(b)The Administrative Agent, the Issuing Lender, and the Lenders hereby expressly reserve all of their rights, remedies, and claims under the Loan Documents. Nothing in this Agreement shall constitute a waiver or relinquishment of (i) any Default or Event of Default under any of the Loan Documents, (ii) any of the agreements, terms or conditions contained in any of the Loan Documents, (iii) any rights or remedies of the Administrative Agent, the Issuing Lender, or any Lender with respect to the Loan Documents, or (iv) the rights of the Administrative Agent, the Issuing Lender, or any Lender to collect the full amounts owing to them under the Loan Documents.

(c)Each of the Borrower, the Administrative Agent, the Issuing Lender, and the Lenders does hereby adopt, ratify, and confirm the Credit Agreement, as amended hereby, and acknowledges and agrees that the Credit Agreement, as amended hereby, and all other Loan Documents are and remain in full force and effect, and the Borrower acknowledges and agrees that its liabilities under the Credit Agreement, as amended hereby, and the other Loan Documents are not impaired in any respect by this Agreement.

(d)From and after the Effective Date, all references to the Credit Agreement and the Loan Documents shall mean such Credit Agreement and such Loan Documents as amended prior hereto as described in the recitals, and by this Agreement.

(e)This Agreement is a Loan Document for the purposes of the provisions of the other Loan Documents. Without limiting the foregoing, any breach of representations, warranties, and covenants under this Agreement shall be a Default or Event of Default, as applicable, under the Credit Agreement.

Section 6.Reaffirmation of the Guaranty. Each Guarantor hereby ratifies, confirms, acknowledges and agrees that its obligations under its respective Guaranty are in full force and effect and that such Guarantor continues to unconditionally and irrevocably guarantee the full and punctual payment, when due, whether at stated maturity or earlier by acceleration or otherwise, of all of the Guaranteed Obligations (as defined in such Guaranty), as such Guaranteed Obligations may have been amended by this Agreement, and its execution and delivery of this Agreement does not indicate or establish an approval or consent requirement by such Guarantor under its respective Guaranty in connection with the execution and delivery of amendments, consents or waivers to the Credit Agreement, the Notes or any of the other Loan Documents.

Section 7.Reaffirmation of Security Documents. Each Loan Party (a) represents and warrants that it has no defenses to the enforceability of any Security Instrument, (b) reaffirms the terms of and its obligations (and the security interests granted by it) under each Security Instrument, and agrees that each such Security Instrument will continue in full force and effect to secure the Obligations as the same may be amended, supplemented, or otherwise modified from time to time, and (c) acknowledges, represents, warrants and agrees that the Liens and security interests granted by it pursuant to the Security Instruments are valid and subsisting and create a security interest to secure the Obligations.

Section 8.Counterparts. This Agreement may be signed in any number of counterparts, each of which shall be an original and all of which, taken together, constitute a single instrument. This Agreement may be executed by facsimile or email (i.e., PDF) signature and all such signatures shall be effective as originals.

Section 9.Successors and Assigns. This Agreement shall be binding upon and inure to the benefit of the Borrower, Holdings, the Lenders, the Issuing Lender, and the Administrative Agent and their respective successors and assigns permitted pursuant to the Credit Agreement.

3

Section 10.Invalidity. In the event that any one or more of the provisions contained in this Agreement shall for any reason be held invalid, illegal or unenforceable in any respect, such invalidity, illegality or unenforceability shall not affect any other provision of this Agreement.

Section 11.Governing Law. This Agreement and any claim, controversy, dispute or cause of action (whether in contract or tort or otherwise) based upon, arising out of or relating to this Agreement and the transactions contemplated hereby shall be governed by, and construed in accordance with, the law of the State of New York (including Section 5-1401 and Section 5-1402 of the General Obligations Law of the State of New York), without reference to any other conflicts or choice of law principles thereof.

Section 12.WAIVER OF JURY TRIAL. EACH LOAN PARTY, THE LENDERS, THE ISSUING LENDER AND THE ADMINISTRATIVE AGENT EACH HEREBY ACKNOWLEDGES THAT IT HAS BEEN REPRESENTED BY AND IT HAS CONSULTED WITH COUNSEL OF ITS CHOICE, AND EACH HEREBY KNOWINGLY, VOLUNTARILY, INTENTIONALLY, AND IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN RESPECT OF ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS AGREEMENT OR ANY OF THE TRANSACTIONS CONTEMPLATED HEREBY.

Section 13.Entire Agreement. This AGREEMENT, the Credit Agreement, as amended by This AGREEMENT, the Notes, and the other Loan Documents constitute the entire understanding among the parties hereto with respect to the subject matter hereof and supersede any prior agreements, written or oral, with respect thereto.

[The remainder of this page has been left blank intentionally.]

4

Execution Version

EXECUTED effective as of the date first above written.

BORROWER:

ALTA MESA HOLDINGS, LP

By: Alta Mesa Holdings GP, LLC,

       its general partner

By:/s/ Michael A. McCabe

Michael A. McCabe

Chief Financial Officer

GUARANTORS:

ALTA MESA HOLDINGS GP, LLC

By:/s/ Michael A. McCabe

Michael A. McCabe

Chief Financial Officer

ALTA MESA FINANCE SERVICES CORP.

By:/s/ Michael A. McCabe

Michael A. McCabe

Chief Financial Officer

OEM GP, LLC

By:/s/ Michael A. McCabe

Michael A. McCabe

Chief Financial Officer

ALTA MESA SERVICES, LP

OKLAHOMA ENERGY ACQUISITIONS, LP

Each By: OEM GP, LLC, its general partner

By:/s/ Michael A. McCabe

Michael A. McCabe

Chief Financial Officer

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

ADMINISTRATIVE AGENT/ ISSUING LENDER/ EXISTING LENDER:

WELLS FARGO BANK, NATIONAL ASSOCIATION,

as Administrative Agent, Issuing Lender, and Lender

By:/s/ Michael Real

Michael Real

Director

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

EXISTING LENDERS:

TORONTO DOMINION (NEW YORK) LLC

By: /s/ Annie Dorval

Name: Annie Dorval

Title: Authorized Signatory

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

ING CAPITAL LLC

By: /s/ Josh Strong

Name: Josh Strong

Title: Director

By: /s/ Scott Lamoreaux

Name: Scott Lamoreaux

Title: Director

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

CITIBANK, N.A.

By: /s/ William McNeely

Name: William McNeely

Title: Senior Vice President

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

CAPITAL ONE, NATIONAL ASSOCIATION

By: /s/ Michael Higgins

Name: Michael Higgins

Title: Managing Director

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

BOKF, NA dba Bank of Texas

By: /s/ Martin W. Wilson

Name: Martin W. Wilson

Title: Senior Vice President

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

NATIXIS

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

MORGAN STANLEY BANK, N.A.

By: /s/ Jake Dowden

Name: Jake Dowden

Title: Authorized Signatory

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

MORGAN STANLEY SENIOR FUNDING, INC.

By: /s/ Jake Dowden

Name: Jake Dowden

Title: Vice President

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

BARCLAYS BANK PLC

By: /s/ Sydney Dennis

Name: Sydney Dennis

Title: Director

Signature Page to

Amendment No. 2 to Credit Agreement

(Alta Mesa Holdings, LP)

#5761373

EX-31.1

EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Harlan H. Chappelle, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Alta Mesa Holdings, LP;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of Alta Mesa Holdings, LP as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rule 13a-15(f) and 15d-15(f))for Alta Mesa Holdings, LP and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to Alta Mesa Holdings, LP, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of Alta Mesa Holdings, LP’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in Alta Mesa Holdings, LP’s internal control over financial reporting that occurred during Alta Mesa Holdings, LP’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, Alta Mesa Holdings, LP’s internal control over financial reporting.

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to Alta Mesa Holdings, LP’s auditors and the audit committee of Alta Mesa Holdings, LP’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect Alta Mesa Holdings, LP’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in Alta Mesa Holdings, LP’s internal control over financial reporting.

Date: November 14, 2018

 /s/ Harlan H. Chappelle

Harlan H. Chappelle

President and Chief Executive Officer of Alta Mesa

Holdings GP, LLC, general partner of Alta Mesa Holdings, LP

EX-31.2

EXHIBIT 31.2

CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Michael A. McCabe, certify that:

1. I have reviewed this Quarterly Report on Form 10-Q of Alta Mesa Holdings, LP;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of Alta Mesa Holdings, LP as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rule 13a-15(f) and 15d-15(f))for Alta Mesa Holdings, LP and have:

a. Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to Alta Mesa Holdings, LP, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b. Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c. Evaluated the effectiveness of Alta Mesa Holdings, LP’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d. Disclosed in this report any change in Alta Mesa Holdings, LP’s internal control over financial reporting that occurred during Alta Mesa Holdings, LP’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, Alta Mesa Holdings, LP’s internal control over financial reporting.

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to Alta Mesa Holdings, LP’s auditors and the audit committee of Alta Mesa Holdings, LP’s board of directors (or persons performing the equivalent functions):

a. All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect Alta Mesa Holdings, LP’s ability to record, process, summarize and report financial information; and

b. Any fraud, whether or not material, that involves management or other employees who have a significant role in Alta Mesa Holdings, LP’s internal control over financial reporting.

Date: November 14, 2018

 /s/ Michael A. McCabe

Michael A. McCabe

Vice President and Chief Financial Officer of Alta Mesa

Holdings GP, LLC, general partner of Alta Mesa Holdings, LP

EX-32.1

Exhibit 32.1

CERTIFICATION OF

CHIEF EXECUTIVE OFFICER

OF ALTA MESA HOLDINGS, LP

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Quarterly Report on Form 10-Q of Alta Mesa Holdings, LP for the period ended June 30, 2018 I, Harlan H. Chappelle, President and Chief Executive Officer of Alta Mesa Holdings, LP, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. This Quarterly Report on Form 10-Q for the period ended September 30, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in this Quarterly Report on Form 10-Q for the period ended September 30, 2018 fairly presents, in all material respects, the financial condition and results of operations of Alta Mesa Holdings, LP for the periods presented therein.

Date: November 14, 2018

 /s/ Harlan H. Chappelle

Harlan H. Chappelle

President and Chief Executive Officer of Alta Mesa

Holdings GP, LLC, general partner of Alta Mesa Holdings, LP

EX-32.2

EXHIBIT 32.2

CERTIFICATION OF

CHIEF FINANCIAL OFFICER

OF ALTA MESA HOLDINGS, LP

PURSUANT TO 18 U.S.C. SECTION 1350

In connection with this Quarterly Report on Form 10-Q of Alta Mesa Holdings, LP for the period ended June 30, 2018, I, Michael A. McCabe, Chief Financial Officer of Alta Mesa Holdings, LP, hereby certify pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. This Quarterly Report on Form 10-Q for the period ended September 30, 2018 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in this Quarterly Report on Form 10-Q for the period ended September 30, 2018 fairly presents, in all material respects, the financial condition and results of operations of Alta Mesa Holdings, LP for the periods presented therein.

Date: November 14, 2018

  /s/ Michael A. McCabe

Michael A. McCabe

Vice President and Chief Financial Officer of Alta Mesa

Holdings GP, LLC, general partner of Alta Mesa Holdings, LP

XML

Document And Entity Information	9 Months Ended
	Sep. 30, 2018 shares
Document And Entity Information [Abstract]
Entity Registrant Name	Alta Mesa Holdings, LP
Entity Central Index Key	0001518403
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Amendment Flag	false
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding (in shares)	0
Entity Emerging Growth Company	true
Entity Small Business	false
Entity Ex Transition Period	false

XML

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Successor
CURRENT ASSETS
Cash and cash equivalents	$ 8,869
Restricted cash	872
Accounts receivable, net	107,984
Other receivables	246
Receivables due from affiliate	16,656
Receivables due from related party	13,085
Note receivable due from related party	1,642
Prepaid expenses and other current assets	3,423
Current assets — discontinued operations	0
Derivative financial instruments	0
Total current assets	152,777
PROPERTY AND EQUIPMENT
Oil and natural gas properties, successful efforts method, net	2,697,757
Other property and equipment, net	93,956
Total property and equipment, net	2,791,713
OTHER ASSETS
Deferred financing costs, net	1,216
Notes receivable due from related party	11,492
Deposits and other long-term assets	86
Non-current assets — discontinued operations	0
Derivative financial instruments	0
Total other assets	12,794
TOTAL ASSETS	2,957,284
CURRENT LIABILITIES
Accounts payable and accrued liabilities	227,139
Accounts payable — affiliate	481
Advances from non-operators	9,233
Advances from related party	16,917
Asset retirement obligations	1,300
Current liabilities — discontinued operations	0
Derivative financial instruments	34,396
Total current liabilities	289,466
LONG-TERM LIABILITIES
Asset retirement obligations, net of current portion	9,169
Long-term debt, net	610,354
Noncurrent liabilities — discontinued operations	0
Derivative financial instruments	7,078
Other long-term liabilities	5
Total long-term liabilities	626,606
TOTAL LIABILITIES	916,072
Commitments and Contingencies (Note 13)
PARTNERS’ CAPITAL	2,041,212
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	$ 2,957,284
Predecessor
CURRENT ASSETS
Cash and cash equivalents		$ 3,660
Restricted cash		1,269
Accounts receivable, net		76,161
Other receivables		1,388
Receivables due from affiliate		0
Receivables due from related party		790
Note receivable due from related party		0
Prepaid expenses and other current assets		2,932
Current assets — discontinued operations		5,195
Derivative financial instruments		216
Total current assets		91,611
PROPERTY AND EQUIPMENT
Oil and natural gas properties, successful efforts method, net		894,630
Other property and equipment, net		32,140
Total property and equipment, net		926,770
OTHER ASSETS
Deferred financing costs, net		1,787
Notes receivable due from related party		12,369
Deposits and other long-term assets		9,067
Non-current assets — discontinued operations		43,785
Derivative financial instruments		8
Total other assets		67,016
TOTAL ASSETS		1,085,397
CURRENT LIABILITIES
Accounts payable and accrued liabilities		170,489
Accounts payable — affiliate		5,476
Advances from non-operators		5,502
Advances from related party		23,390
Asset retirement obligations		69
Current liabilities — discontinued operations		15,419
Derivative financial instruments		19,303
Total current liabilities		239,648
LONG-TERM LIABILITIES
Asset retirement obligations, net of current portion		10,400
Long-term debt, net		607,440
Noncurrent liabilities — discontinued operations		66,862
Derivative financial instruments		1,114
Other long-term liabilities		5,488
Total long-term liabilities		691,304
TOTAL LIABILITIES		930,952
Commitments and Contingencies (Note 13)
PARTNERS’ CAPITAL		154,445
TOTAL LIABILITIES AND PARTNERS’ CAPITAL		$ 1,085,397

XML

Condensed Consolidated Statements Of Operations - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Successor
Total operating revenues		$ 134,103		$ 280,601
OPERATING REVENUES AND OTHER
Gain (loss) on sale of assets and other		(18)		5,898
Gain on acquisition of oil and gas properties		0		0
Gain (loss) on derivative contracts		(11,212)		(63,077)
Total operating revenues and other		122,873		223,422
OPERATING EXPENSES
Production taxes		6,311		10,332
Workover expense		1,065		2,643
Exploration expense		1,029		14,067
Depreciation, depletion and amortization expense		45,623		83,068
Impairment expense		0		0
Accretion expense		226		489
General and administrative expense		7,918		57,188
Total operating expenses		94,343		237,742
INCOME (LOSS) FROM OPERATIONS		28,530		(14,320)
OTHER INCOME (EXPENSE)
Interest expense		(11,008)		(26,565)
Interest income and other		322		1,688
Total other income (expense), net		(10,686)		(24,877)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE STATE INCOME TAXES		17,844		(39,197)
Provision for state income taxes		0		7
INCOME (LOSS) FROM CONTINUING OPERATIONS		17,844		(39,204)
Loss from discontinued operations, net of state income tax		0		0
NET INCOME (LOSS)		17,844		(39,204)
Predecessor
Total operating revenues	$ 40,136		$ 63,124		$ 189,511
OPERATING REVENUES AND OTHER
Gain (loss) on sale of assets and other	0		0		0
Gain on acquisition of oil and gas properties	0		5,267		5,267
Gain (loss) on derivative contracts	7,298		(10,468)		38,024
Total operating revenues and other	47,434		57,923		232,802
OPERATING EXPENSES
Production taxes	953		1,262		3,712
Workover expense	423		1,441		3,131
Exploration expense	3,633		3,649		11,888
Depreciation, depletion and amortization expense	11,784		24,159		63,247
Impairment expense	0		0		1,188
Accretion expense	39		108		234
General and administrative expense	24,352		17,445		35,474
Total operating expenses	49,394		66,785		172,257
INCOME (LOSS) FROM OPERATIONS	(1,960)		(8,862)		60,545
OTHER INCOME (EXPENSE)
Interest expense	(5,511)		(13,545)		(38,165)
Interest income and other	172		244		792
Total other income (expense), net	(5,339)		(13,301)		(37,373)
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE STATE INCOME TAXES	(7,299)		(22,163)		23,172
Provision for state income taxes	0		0		285
INCOME (LOSS) FROM CONTINUING OPERATIONS	(7,299)		(22,163)		22,887
Loss from discontinued operations, net of state income tax	(7,593)		(2,041)		(37,490)
NET INCOME (LOSS)	(14,892)		(24,204)		(14,603)
Oil | Successor
Total operating revenues		107,253		222,822
Oil | Predecessor
Total operating revenues	30,972		44,201		133,489
Natural gas | Successor
Total operating revenues		11,959		25,149
Natural gas | Predecessor
Total operating revenues	4,276		9,583		29,816
Natural gas liquids | Successor
Total operating revenues		13,880		28,835
Natural gas liquids | Predecessor
Total operating revenues	4,000		7,548		21,201
Other revenues | Successor
Total operating revenues		1,011		3,795
Other revenues | Predecessor
Total operating revenues	888		1,792		5,005
Lease operating expense | Successor
OPERATING EXPENSES
Marketing and transportation expense		16,351		37,347
Lease operating expense | Predecessor
OPERATING EXPENSES
Marketing and transportation expense	4,485		10,407		32,897
Marketing and transportation expense | Successor
OPERATING EXPENSES
Marketing and transportation expense		$ 15,820		$ 32,608
Marketing and transportation expense | Predecessor
OPERATING EXPENSES
Marketing and transportation expense	$ 3,725		$ 8,314		$ 20,486

XML

Condensed Consolidated Statements Of Changes In Partners' Capital $ in Thousands	USD ($)
Beginning balance (Predecessor) at Dec. 31, 2016	$ 32,106
Distribution of non-stack (assets) net liability | Predecessor	0
Capital contributions | Predecessor	200,000
Distributions | Predecessor	0
Issuance of additional Alta Mesa purchase consideration | Predecessor	0
Equity-based compensation expense | Predecessor	0
Net income (loss) | Predecessor	(14,603)
Ending balance (Predecessor) at Sep. 30, 2017	217,503
Beginning balance (Predecessor) at Jun. 30, 2017	41,707
Distribution of non-stack (assets) net liability | Predecessor	0
Capital contributions | Predecessor	200,000
Distributions | Predecessor	0
Issuance of additional Alta Mesa purchase consideration | Predecessor	0
Equity-based compensation expense | Predecessor	0
Net income (loss) | Predecessor	(24,204)
Ending balance (Predecessor) at Sep. 30, 2017	217,503
Beginning balance (Predecessor) at Dec. 31, 2017	154,445
Distribution of non-stack (assets) net liability | Predecessor	33,102
Capital contributions | Predecessor	0
Distributions | Predecessor	0
Issuance of additional Alta Mesa purchase consideration | Predecessor	0
Equity-based compensation expense | Predecessor	0
Net income (loss) | Predecessor	(14,892)
Ending balance (Successor) at Feb. 08, 2018	1,535,891
Ending balance (Predecessor) at Feb. 08, 2018	172,655
Distribution of non-stack (assets) net liability | Successor	0
Capital contributions | Successor	560,344
Distributions | Successor	(32,000)
Issuance of additional Alta Mesa purchase consideration | Successor	9,467
Equity-based compensation expense | Successor	6,714
Net income (loss) | Successor	(39,204)
Ending balance (Successor) at Sep. 30, 2018	2,041,212
Beginning balance (Successor) at Jun. 30, 2018	2,048,043
Distribution of non-stack (assets) net liability | Successor	0
Capital contributions | Successor	0
Distributions | Successor	(25,000)
Issuance of additional Alta Mesa purchase consideration | Successor	0
Equity-based compensation expense | Successor	325
Net income (loss) | Successor	17,844
Ending balance (Successor) at Sep. 30, 2018	$ 2,041,212

XML

Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Thousands	1 Months Ended	8 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2018	Sep. 30, 2017
Adjustments to reconcile net loss to net cash provided by operating activities:
Amortization of debt premium		$ 3,300
Successor
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss		(39,204)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization expense		83,068
Impairment expense		0
Accretion expense		489
Amortization of deferred financing costs		151
Amortization of debt premium		(3,281)
Equity-based compensation expense		6,714
Dry hole expense		0
Expired leases		10,658
(Gain) loss on derivative contracts		63,077
Cash settlements of derivative contracts		(32,836)
Premium paid on derivative contracts		0
Interest converted into debt		0
Interest added to notes receivable due from related party		(680)
Loss on sale of assets and other		81
Gain on acquisition of oil and gas properties		0
Impact on cash from changes in assets and liabilities:
Accounts receivable		(5,715)
Other receivables		976
Receivables due from affiliate		(16,656)
Receivables due from related party		(12,178)
Prepaid expenses and other current and non-current assets		8,181
Advances from related party		(30,589)
Settlement of asset retirement obligations		(1,249)
Accounts payable — related party		(4,994)
Accounts payable, accrued liabilities and other liabilities		(10,531)
NET CASH PROVIDED BY OPERATING ACTIVITIES		15,482
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures for property and equipment		(489,009)
Acquisitions		0
Proceeds from sale of assets and other, net		11
Notes receivable due from affiliate		0
NET CASH USED IN INVESTING ACTIVITIES		(488,998)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuances of long-term debt		80,000
Repayments of long-term debt		(134,065)
Additions to deferred financing costs		(1,367)
Capital distributions		(32,000)
Capital contributions		560,344
NET CASH PROVIDED BY FINANCING ACTIVITIES		472,912
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH		(604)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period		10,345
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	$ 10,345	9,741
Predecessor
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	(14,892)		$ (14,603)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation, depletion and amortization expense	12,414		80,082
Impairment expense	5,560		29,206
Accretion expense	140		1,447
Amortization of deferred financing costs	171		2,205
Amortization of debt premium	0		0
Equity-based compensation expense	0		0
Dry hole expense	(45)		2,447
Expired leases	1,250		8,394
(Gain) loss on derivative contracts	(7,298)		(38,024)
Cash settlements of derivative contracts	(1,661)		1,775
Premium paid on derivative contracts	0		(520)
Interest converted into debt	103		904
Interest added to notes receivable due from related party	(85)		(619)
Loss on sale of assets and other	1,923		0
Gain on acquisition of oil and gas properties	0		(6,893)
Impact on cash from changes in assets and liabilities:
Accounts receivable	(20,895)		(33,649)
Other receivables	(9,887)		7,382
Receivables due from affiliate	0		0
Receivables due from related party	(117)		169
Prepaid expenses and other current and non-current assets	9,970		(9,938)
Advances from related party	24,116		5,266
Settlement of asset retirement obligations	(63)		(6,083)
Accounts payable — related party	0		0
Accounts payable, accrued liabilities and other liabilities	25,815		27,308
NET CASH PROVIDED BY OPERATING ACTIVITIES	26,519		56,256
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures for property and equipment	(38,096)		(244,308)
Acquisitions	0		(55,236)
Proceeds from sale of assets and other, net	0		0
Notes receivable due from affiliate	0		(1,515)
NET CASH USED IN INVESTING ACTIVITIES	(38,096)		(301,059)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from issuances of long-term debt	60,000		286,065
Repayments of long-term debt	(43,000)		(251,622)
Additions to deferred financing costs	0		(220)
Capital distributions	(68)		0
Capital contributions	0		207,875
NET CASH PROVIDED BY FINANCING ACTIVITIES	16,932		242,098
NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH	5,355		(2,705)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of period	4,990	$ 10,345	7,618
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of period	$ 10,345		$ 4,913

XML

Description Of Business

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description Of Business

DESCRIPTION OF BUSINESS

Alta Mesa Holdings, LP, together with its subsidiaries (“we,” “us,” “our,” the “Company,” and “Alta Mesa”), is an exploration and production company focused on the acquisition, development, exploration and exploitation of unconventional onshore oil and natural gas reserves in the eastern portion of the Anadarko Basin in Oklahoma. Our activities are primarily directed at the horizontal development of an oil and liquids-rich resource play in an area of the basin commonly referred to as the Sooner Trend Anadarko Basin Canadian and Kingfisher County (“STACK”). 

As described further in Note 5 — Business Combination, certain transactions were consummated on February 9, 2018 that resulted in our acquisition by Alta Mesa Resources, Inc. (“AMR”). These transactions are referred to as the “Business Combination”. AMR is a publicly traded corporation that is not under the control of any person. Prior to the closing of the Business Combination, we were controlled by High Mesa Inc. (“High Mesa”) and indirectly by our founder and Chief Operating Officer, Michael E. Ellis.

In connection with the closing of the Business Combination, we distributed our non-STACK assets and liabilities to High Mesa Holdings, LP (the “AM Contributor”) and completed our transition from a diversified asset base composed of a portfolio of conventional assets to an oil and liquids-rich resource play in the STACK.

XML

Summary Of Significant Accounting Policies

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Summary Of Significant Accounting Policies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

We have provided a discussion of significant accounting policies in Note 2 in our Annual Report on Form 10-K for the year ended December 31, 2017 (the “2017 Annual Report”).  As of September 30, 2018, our significant accounting policies are consistent with those discussed in Note 2 in the 2017 Annual Report, other than as noted below.

Basis of Presentation. As a result of the Business Combination, AMR was treated as the accounting acquirer and we are the accounting acquiree.  Pursuant to Financial Accounting Standards Board (“FASB”) Accounting Standard Codification (“ASC”) 805, Business Combinations, (“ASC 805”), our identifiable assets acquired and liabilities assumed were provisionally recorded at their estimated fair values on the Closing Date of the Business Combination (also referred to herein as the “acquisition date”).  Fair value adjustments related to the transaction have been pushed down to us resulting in our assets and liabilities being recorded at fair value as of the acquisition date.  As a result of the Transactions described above, the financial statements and certain footnote presentations separate the Company’s presentations into two distinct periods, the period before the consummation of the transaction (“Predecessor”) and the period after that date (“Successor”), to indicate the application of the different basis of accounting between the periods presented.  The Successor periods presented herein are for the three months ended September 30, 2018 and from February 9, 2018 to September 30, 2018 (collectively, “Successor Periods”); and the Predecessor periods presented herein are from January 1, 2018 to February 8, 2018 (“2018 Predecessor Period”), the three months ended September 30, 2017 and the nine months ended September 30, 2017 (“2017 Predecessor Period,” and, together with the 2018 Predecessor Period, the “Predecessor Periods”).

As noted above, we distributed our non-STACK assets and liabilities to the AM Contributor in connection with the closing of the Business Combination.  The distribution of our non-STACK assets and liabilities and the sale of our Weeks Island field during the fourth quarter of 2017 (collectively, the “non-STACK assets”) were part of the Company’s overall strategic shift to operate only in the eastern Anadarko Basin.  As a result, we have classified the assets and liabilities and operating results of the non-STACK assets as discontinued operations during the Predecessor Periods within the condensed consolidated financial statements.  See Note 7 — Discontinued Operations (Predecessor) for further discussion.

Principles of Consolidation and Reporting. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The condensed consolidated financial statements reflect our accounts after elimination of all significant intercompany transactions and balances.

The condensed consolidated financial statements included herein as of September 30, 2018, and for the three months ended September 30, 2018 (Successor) and the period from February 9, 2018 through September 30, 2018 (Successor), the period from January 1, 2018 through February 8, 2018 (Predecessor) and the three and nine months endedSeptember 30, 2017 (Predecessor), are unaudited, and in the opinion of management, the information furnished reflects all material adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of consolidated financial position and of the results of operations for the interim periods presented.  The condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our annual consolidated financial statements for the year ended December 31, 2017, which were filed with the Securities and Exchange Commission (the “SEC”) in our 2017 Annual Report.  Certain reclassifications of prior period condensed consolidated financial statements have been made to conform to current reporting practices.  The reclassifications had no impact on net income (loss) or partners’ capital. The consolidated results of operations for interim periods are not necessarily indicative of results to be expected for a full year. 

The Company’s condensed consolidated statement of operations subsequent to the Business Combination includes depreciation and amortization expense on the Company’s property and equipment balances resulting from the fair value adjustments made under the new basis of accounting. Certain other items of income and expense were also impacted. Therefore, the Company’s financial information prior to the Business Combination is not comparable to its financial information subsequent to the Business Combination.

Use of Estimates. The preparation of 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period.

Reserve estimates significantly impact depreciation, depletion, and amortization expense and potential impairments of oil and natural gas properties and are subject to change based on changes in oil and natural gas prices and trends and changes in estimated reserve quantities. Other estimates are utilized to determine amounts related to oil and natural gas revenues, the value of oil and natural gas properties, the value of other property and equipment, bad debts, asset retirement obligations, derivative contracts, accounting for business combinations, state taxes, share-based compensation and contingencies and litigation. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances.  We review estimates and underlying assumptions on a regular basis.  Actual results may differ from these estimates.

Restricted Cash. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets and the consolidated statements of cash flows (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Cash and cash equivalents	$	8,869	$	3,660
Restricted cash	872		1,269
Cash of discontinued operations	—		61
Total cash, cash equivalents and restricted cash	$	9,741	$	4,990

Bond Premium on Senior Unsecured Notes. As a result of the pushdown accounting related to the Business Combination, the Company estimated the fair value of our $500.0 million senior unsecured notes at $533.6 million as of the acquisition date.  The amount in excess of the original principal balance was recorded as a bond premium, which is being amortized as a reduction to interest expense. 

Equity-Based Compensation (Successor). The Company recognizes compensation related to all stock-based awards in the financial statements based on their estimated grant-date fair value. AMR grants various types of stock-based awards including stock options, restricted stock and performance-based restricted stock units. The fair value of stock option awards is determined using the Black-Scholes option pricing model. Service-based restricted stock awards and performance-based restricted stock units are valued using the market price of AMR’s common stock on the grant date. Compensation cost is recognized ratably over the applicable vesting period.  See Note 16 — Equity-Based Compensation for additional information regarding the Company’s equity based compensation.

Going Concern. The Company’s management is required to evaluate an entity’s ability to continue as a going concern for a period of one year following the date of the issuance of the Company’s consolidated financial statements. Disclosure is required if substantial doubt exists about an entity’s ability to continue as a going concern during the evaluation period, including management’s plans to alleviate the conditions and events that raise substantial doubt of going concern, if applicable.

At the date of the issuance of these consolidated financial statements, management considers the Company to be a going concern and has prepared these consolidated financial statements on a going concern basis.

Recent Accounting Pronouncements Issued But Not Yet Adopted. In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (“ASU 2018-15”). The amendments in this standard align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal use software (and hosting arrangements that include an internal-use software license). Under this new standard, a customer in a hosting arrangement that is a service contract is required to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as a prepaid asset related to the service contract and which costs to expense. The capitalized implementation costs are to be expensed over the term of the hosting arrangement and reflected in the same line in the consolidated statement of operations as the fees associated with the hosting element of the arrangement. Similarly, capitalized implementation costs are to be presented in the statement of cash flows in the same line as payments made for fees associated with the hosting element. The Company will adopt this new standard at the same time as our parent company, which will be no later than the fiscal year beginning after December 15, 2019, although early adoption is permitted. The Company is currently evaluating the impact of this new standard on its consolidated financial position and results of operations and has not yet determined when to adopt and whether to apply the new standard retrospectively or prospectively to implementation costs incurred after the date of adoption.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which seeks to provide a single, comprehensive revenue recognition model for all contracts with customers concerning the recognition, measurement and disclosure of revenue from those contracts. Subsequent to the issuance of ASU 2014-09, the FASB amended the standard to provide clarification and interpretive guidance to assist entities with implementation efforts, including guidance pertaining to the presentation of revenues on a gross basis (revenues presented separately from associated expenses) versus a net basis. The core principle of the new amended standard is that a company will recognize revenue when it transfers promised goods and services to customers in an amount that reflects the consideration to which the company is entitled in exchange for those services. In order to comply with the new standard, companies will need to (i) identify performance obligations in each contract, (ii) estimate the amount of variable consideration to include in the transaction price and (iii) allocate the transaction price to each separate performance obligation.

ASU 2014-09, as amended, is effective for interim and annual periods beginning after December 15, 2017, except for emerging growth companies that elect to use the extended transition period for complying with any new or revised financial accounting standards pursuant to Section 7(a)(2)(b) of the Securities Act.

ASU 2014-09 allows for either full retrospective adoption, meaning the standard is applied to all periods presented in the financial statements, or modified retrospective adoption, meaning the standard is applied only to the most current period presented. As an emerging growth company, we previously elected to use the extended transition period to defer implementation of the new standard until the first quarter of 2019 using the modified retrospective method with a cumulative adjustment to retained earnings as necessary. AMR, our parent company, is also an emerging growth company, but will cease to be an emerging growth company on December 31, 2018, which will require them to adopt ASU 2014-09 on December 31, 2018, with modified retroactive implementation as of January 1, 2018. Accordingly, we will also adopt ASU 2014-09 at the same time as our parent company.

We are continuing our review of contracts for each of our revenue streams and evaluating the impact on our consolidated financial statements. We are continuing to evaluate the provisions of ASU 2014-09, as it relates to certain sales contracts, and in particular, as it relates to disclosure requirements. In addition, we are evaluating the impact, if any, on the presentation of our revenues and expenses under the new gross-versus-net presentation guidance and on our current accounting policies, including the need to make changes to relevant accounting policies and internal controls, if needed. Based on assessments performed to date, we do not expect ASU 2014-09 to have an effect on the timing of revenue recognition or our financial position. In addition, we currently expect the impact regarding gross-versus-net presentation to involve certain presentation changes specifically related to natural gas processing contracts; however, the impact of such presentation changes will not impact our consolidated operating income, net income or cash flows.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”), which supersedes ASC 840 “Leases” and creates a new topic, ASC 842 “Leases.” The amendments in this update require, among other things, that lessees recognize the following for all leases (except for short-term leases) at the commencement date: (i) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (ii) a right-of-use asset, which is an asset that represents a lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. ASU 2016-02 also requires disclosures designed to provide information on the amount, timing, and uncertainty of cash flows arising from leases.  In January 2018, the FASB issued ASU No. 2018-01, Land easement practical expedient for transition to Topic 842 (“ASU 2018-01”), which provides an optional transition practical expedient to not evaluate under Topic 842 existing or expired land easements that were not previously accounted for as leases under Topic 840, Leases.  The standard, as amended, will be effective for interim and annual periods beginning after December 15, 2018. In the normal course of business, we enter into operating lease agreements to support our exploration and development operations and lease assets such as drilling rigs, well equipment, compressors, office space and other assets.

The standard provides several optional practical expedients in transition. We expect to elect the “package of practical expedients”, which permits us to forgo reassessment of our prior conclusions about lease identification, lease classification and initial direct costs for leases entered into prior to the effective date. We also expect to elect the land easement relief which permits us to forgo reassessment of existing or expired land easements not previously accounted for under ASC 840. Additionally, we expect to elect the practical expedient to not provide comparative reporting periods and therefore financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. We do not expect to elect the use-of-hindsight practical expedient.

At this time, we are evaluating the financial impact ASU 2016-02 will have on our financial statements; however, the adoption and implementation of ASU 2016-02 is expected to have an impact on our consolidated balance sheets resulting in an increase in both the assets and liabilities relating to our operating lease activities greater than twelve months.  The adoption may also result in a change in the amount of lease expense recorded on our consolidated statements of operations, as well as add additional disclosures.  We expect our implementation work team will complete its evaluation of this new standard by the end of 2018.  

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”), which is intended to reduce diversity in practice in how certain transactions are classified in the statements of cash flows. ASU 2016-15 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2017. As an emerging growth company, we had elected to use the extended transition period to defer adoption of this standard until 2019.  However, our parent company will lose its emerging growth status, effective December 31, 2018.  Accordingly, we will be required to adopt this new standard on December 31, 2018, when adopted by our parent company. The adoption of this guidance will not impact our financial position or results of operations but could result in presentational changes in our consolidated statements of cash flows. 

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard requires the use of a new “expected credit loss” impairment model rather than the “incurred loss” model used today. With respect to our trade receivables and certain other financial instruments, we may be required to (i) maintain and use lifetime loss information rather than annual loss data and (ii) forecast future economic conditions and quantify the effect of those conditions on future expected losses. The standard, which will be effective for us in fiscal years beginning after December 15, 2019, also requires additional disclosures regarding the credit quality of our trade receivables and other financial instruments. No determination has yet been made of the impact of this new standard on our financial position or results of operations.

XML

Supplemental Cash Flow Information

9 Months Ended

Sep. 30, 2018

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information

SUPPLEMENTAL CASH FLOW INFORMATION

Supplemental cash flow disclosures and non-cash investing and financing activities are presented below (in thousands):

໿

	Successor			Predecessor
	February 9, 2018			January 1, 2018		Nine
	Through			Through		Months Ended
	September 30, 2018			February 8, 2018		September 30, 2017
Supplemental cash flow information:
Cash paid for interest	$	22,073		$	1,145	$	25,675
Cash paid for state income taxes	7			—		—
Non-cash investing and financing activities:
Increase in asset retirement obligations	4,652			—		3,778
Asset retirement obligations assumed, purchased properties	—			—		705
Increase in accruals or payables for capital expenditures	35,967			4,712		41,322
Distribution of non-STACK (assets) net liability	—			33,102		—
Increase in accounts receivable for sale of assets	(524		)	—		—

XML

Accounts Receivable

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Accounts Receivable

ACCOUNTS RECEIVABLE

Accounts receivable consisted of the following (in thousands):

໿

	Successor			Predecessor
	September 30, 2018			December 31, 2017
Oil, natural gas and natural gas liquids sales	$	40,134		$	26,916
Joint interest billings	44,548			13,821
Pooling interest (1)	23,367			35,839
Allowance for doubtful accounts	(65		)	(415		)
Total accounts receivable, net	$	107,984		$	76,161

_________________

(1) Pooling interest relates to Oklahoma’s forced pooling process which requires the Company to offer mineral interest owners the option to participate in the drilling of proposed wells.  The pooling interest listed above represents costs of unbilled interests on wells which the Company incurred before the pooling process was completed.  Depending upon the outcome of the pooling process, these costs may be billed to potential working interest owners or added to oil and gas properties.

XML

Business Combination

9 Months Ended

Sep. 30, 2018

Business Combinations [Abstract]

Business Combination

BUSINESS COMBINATION

On February 9, 2018 (the “Closing Date”), we consummated the transactions contemplated by the Contribution Agreement, dated August 16, 2017, with AMR (formerly Silver Run Acquisition Corporation II), AM Contributor, High Mesa Holdings GP, LLC,  the sole general partner of the AM Contributor, Alta Mesa Holdings GP, LLC, our sole general partner (“AMH GP”), and, solely for certain provisions therein, the equity owners of the AM Contributor (“AM Contribution Agreement”). Simultaneous with the execution of the AM Contribution Agreement, AMR entered into (i) a Contribution Agreement, dated August 16, 2017, with KFM Holdco, LLC, a Delaware limited liability company (the “KFM Contributor”), Kingfisher Midstream, LLC, a Delaware limited liability company (“Kingfisher”), and, solely for certain provisions therein, the equity owners of the KFM Contributor (the “KFM Contribution Agreement”); and (ii) a Contribution Agreement (the “Riverstone Contribution Agreement” and, together with the AM Contribution Agreement and the KFM Contribution Agreement, the “Contribution Agreements”) with Riverstone VI Alta Mesa Holdings, L.P., a Delaware limited partnership (the “Riverstone Contributor”).

Pursuant to the Contribution Agreements, SRII Opco, LP, a newly formed subsidiary of AMR (“SRII Opco”), acquired (a) (i) all of the limited partner interests in us and (ii) 100% of the economic interests and 90% of the voting interests in AMH GP ((i) and (ii) together, the “AM Contribution”) and (b) 100% of the economic interests in Kingfisher (the “Kingfisher Contribution”). The acquisition of us and Kingfisher pursuant to the Contribution Agreements is referred to herein as the “Business Combination” and the transactions contemplated by the Contribution Agreements are referred to herein as the “Transactions.” As a result of the Transactions, AMR has obtained control over the management of AMH GP and, consequently, us.

At the closing of the Transactions, the AM Contributor received 138,402,398 common units representing limited partner interests (the “Common Units”) in SRII Opco.  The AM Contributor also acquired from AMR a number of newly issued shares of non-economic capital stock of AMR, designated as Class C common stock, par value $0.0001 per share (the “Class C Common Stock”), corresponding to the number of Common Units received by the AM Contributor at closing.  

Additionally, for a period of seven years following the closing, the AM Contributor will be entitled to receive additional SRII Opco Common Units (and acquire a corresponding number of shares of AMR’s Class C Common Stock) as earn-out consideration if the 20-day volume-weighted average price (“20-Day VWAP”) of the Class A Common Stock of AMR equals or exceeds the following prices (each such payment, an “Earn-Out Payment”):

໿

20-Day VWAP	Earn-Out Consideration
$14.00	10,714,285 Common Units
$16.00	9,375,000 Common Units
$18.00	13,888,889 Common Units
$20.00	12,500,000 Common Units

The AM Contributor will not be entitled to receive a particular Earn-Out Payment on more than one occasion and, if, on a particular date, the 20-Day VWAP entitles the AM Contributor to more than one Earn-Out Payment (each of which has not been previously paid), the AM Contributor will be entitled to receive each such Earn-Out Payment. The AM Contributor will be entitled to the earn-out consideration described above in connection with certain liquidity events of AMR, including a merger or sale of all or substantially all of AMR’s assets, if the consideration paid to holders of Class A Common Stock in connection with such liquidity event is greater than any of the above-specified 20-Day VWAP hurdles.

AMR also contributed $560 million in net cash to us at the closing. AMR’s source for these funds was from the sale of its securities to investors in a public offering and in private placements.  We used a portion of the amount to repay all outstanding balance under the senior secured revolving credit facility described in Note 11 — Long-Term Debt, Net.

Pursuant to the AM Contribution Agreement, AM Contributor delivered a final closing statement during the second quarter of 2018. Based on the final closing statement, the AM Contributor received an additional 1,197,934 SRII Opco Common Units and an equivalent number of shares of AMR’s Class C Common Stock.

The Business Combination has been accounted for using the acquisition method. The acquisition method of accounting is based on FASB ASC 805, Business Combination (“ASC 805”), and uses the fair value concepts defined in FASB ASC 820, Fair Value Measurements (“ASC 820”). ASC 805 requires, among other things, that our assets acquired and liabilities assumed be recognized at their fair values as of the acquisition date by AMR, who was determined to be the accounting acquirer.  We have not completed the detailed valuation studies necessary to arrive at the final determination of the fair value of the assets acquired, the liabilities assumed and the related allocations of the purchase price in the Business Combination. As a result, the values of certain of our long-term assets and liabilities are preliminary in nature and are subject to change as additional information becomes available and as additional analysis is performed.  Pursuant to ASC 805, finalization of the values is to be completed within one year of the acquisition date.

Preliminary Estimated Purchase Price

AMR’s preliminary estimated purchase price consideration for Alta Mesa was as follows (in thousands):

໿

	February 9, 2018 (As initially reported)		Measurement Period Adjustment (1)		February 9, 2018 (As adjusted)
Preliminary Purchase Consideration:(2)
SRII Opco Common Units issued (3)	$	1,251,782	$	9,467	$	1,261,249
Estimated fair value of contingent earn-out purchase consideration (4)	284,109		—		284,109
Total purchase price consideration	$	1,535,891	$	9,467	$	1,545,358

_________________

(1) The measurement period adjustment relates to the issuance of 1,197,934 of additional SRII Opco Common Units, valued at approximately $7.90 per unit, to the AM Contributor based on a final closing statement agreed to by the parties during the three months ended June 30, 2018 (Successor).

(2) The preliminary purchase price consideration is for 100% of the limited partner interests in us and 100% of the economic interests and 90% of the voting interests in AMH GP.  

(3) At closing, the Riverstone Contributor received consideration of 20,000,000 SRII Opco Common Units and the AM Contributor received consideration of 138,402,398 SRII Opco Common Units. The estimated fair value of an SRII Opco Common Unit was approximately $7.90 per unit and reflects discounts for holding requirements and liquidity.

(4) For a period of seven years following Closing, the AM Contributor will be entitled to receive an earn-out consideration to be paid in the form of SRII Opco Common Units (and a corresponding number of shares of AMR Class C Common Stock) if the 20-day VWAP of the Class A Common Stock of AMR equals or exceeds the specified prices pursuant to the AM Contribution Agreement. Pursuant to ASC 805 and ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), we have determined that the fair value of the earn-out consideration was approximately $284.1 million, which was classified as equity. The fair value of the contingent equity earn-out consideration was determined using the Monte Carlo simulation valuation method based on Level 3 inputs as defined in the fair value hierarchy. The key inputs included the listed market price for Class A Common Stock, market volatility of a peer group of companies similar to AMR (due to the lack of trading activity in the Class A Common Stock), no dividend yield, an expected life of each earn-out threshold based on the remaining contractual term of the contingent liability earn-out period and a risk-free rate based on U.S. dollar overnight indexed swaps with a maturity equivalent to the earn-out’s expected life.

Preliminary Estimated Purchase Price Allocation

The allocation of AMR’s preliminary estimate of the purchase consideration to the assets acquired and liabilities assumed in the acquisition of Alta Mesa was as follows (in thousands):

໿

	February 9, 2018 (As initially reported)		Measurement Period Adjustment (1)			February 9, 2018 (As adjusted)
Estimated Fair Value of Assets Acquired(2)
Cash, cash equivalents and short term restricted cash	$	10,345	$	—		$	10,345
Accounts receivable	101,745		—			101,745
Other receivables	1,222		—			1,222
Receivables due from related party	907		—			907
Prepaid expenses and other current assets	1,405		—			1,405
Derivative financial instruments	352		—			352
Property and equipment:(3)
Oil and natural gas properties, successful efforts	2,314,858		(1,479		)	2,313,379
Other property and equipment, net	43,318		—			43,318
Notes receivable due from related party	12,454		—			12,454
Deposits and other long-term assets	10,286		—			10,286
Total fair value of assets acquired	2,496,892		(1,479		)	2,495,413
Estimated Fair Value of Liabilities Assumed (2)
Accounts payable and accrued liabilities	210,867		(10,946		)	199,921
Accounts payable — affiliate	5,476		—			5,476
Advances from non-operators	6,803		—			6,803
Advances from related party	47,506		—			47,506
Asset retirement obligations (3)	5,998		—			5,998
Derivative financial instruments	11,585		—			11,585
Long-term debt(4)	667,700		—			667,700
Other long-term liabilities	5,066		—			5,066
Total fair value of liabilities assumed	961,001		(10,946		)	950,055
Total consideration and fair value	$	1,535,891	$	9,467		$	1,545,358

_________________

(1) The measurement period adjustments are recognized in the reporting period in which the adjustments were determined and calculated as if the accounting had been completed at the acquisition date.

(2) The assets acquired and liabilities assumed relate to Alta Mesa’s STACK assets.

(3) The estimated fair values of oil and natural gas properties and asset retirement obligations were determined using valuation techniques that convert future cash flows to a single discounted amount and involve the use of certain inputs that are not observable in the market (Level 3 inputs). Significant inputs include, but are not limited to recoverable reserves, production rates, future operating and development costs, future commodity prices, appropriate risk-adjusted discount rates and other relevant data. These inputs required significant judgments and estimates by management at the time of the valuation. Actual results may vary from these estimates.

(4) Represents the approximate fair value as of the acquisition date of Alta Mesa’s $500.0 million aggregate principal amount of 7.875% senior unsecured notes due December 15, 2024, totaling approximately $533.6 million, based on Level 1 inputs, and outstanding borrowings under the Eighth A&R credit facility (described in Note 11 — Long-Term Debt, Net) of approximately $134.1 million as of the acquisition date.

XML

Property And Equipment

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Property And Equipment

PROPERTY AND EQUIPMENT

Property and equipment consisted of the following (in thousands):

	Successor			Predecessor
	September 30, 2018			December 31, 2017
OIL AND NATURAL GAS PROPERTIES
Unproved properties	$	865,695		$	84,590
Accumulated impairment of unproved properties	—			—
Unproved properties, net	865,695			84,590
Proved oil and natural gas properties	1,913,526			1,061,105
Accumulated depreciation, depletion, amortization and impairment	(81,464		)	(251,065		)
Proved oil and natural gas properties, net	1,832,062			810,040
TOTAL OIL AND NATURAL GAS PROPERTIES, net	2,697,757			894,630
OTHER PROPERTY AND EQUIPMENT
Land	5,059			2,912
Salt water disposal system	88,176			30,990
Office furniture and equipment and vehicles	2,325			20,008
Accumulated depreciation	(1,604		)	(21,770		)
OTHER PROPERTY AND EQUIPMENT, net	93,956			32,140
TOTAL PROPERTY AND EQUIPMENT, net	$	2,791,713		$	926,770

In conjunction with pushdown accounting, property and equipment was measured at fair value as of the acquisition date, which also impacted how value was assigned between the categories within property and equipment (see Note 5 — Business Combination for details).

XML

Discontinued Operations (Predecessor)

9 Months Ended

Sep. 30, 2018

Discontinued Operations and Disposal Groups [Abstract]

Discontinued Operations (Predecessor)

DISCONTINUED OPERATIONS (Predecessor)

We distributed our non-STACK assets and related liabilities to the AM Contributor immediately prior to the Closing Date of the Business Combination.  The distribution of our non-STACK assets and related liabilities and the sale of our Weeks Island field during the fourth quarter of 2017 were part of our overall strategic shift to operate only in the eastern Anadarko Basin.  As a result, the Predecessor’s non-STACK assets and liabilities have been presented as discontinued operations in the consolidated balance sheets.  The operating results directly related to non-STACK assets and liabilities have been segregated and presented as discontinued operations within the condensed consolidated financial statements in the 2018 Predecessor Period and the 2017 Predecessor Periods. 

Prior to the Business Combination, we had notes payable to our founder (“Founder Notes”) that bore simple interest at 10%.  In connection with the Transactions described in Note 5 –Business Combination, the Founder Notes were converted into an equity interest in the AM Contributor immediately prior to the closing of the Business Combination as they were considered part of the non-STACK asset distribution.  The balance of the Founder Notes at the time of conversion was approximately $28.3 million, including accrued interest.  Interest on the Founder Notes was $0.1 million for the 2018 Predecessor Period and $0.3 million and $0.9 million for the three months ended September 30, 2017 (Predecessor) and 2017 Predecessor Period, respectively.

The assets and liabilities directly related to the non-STACK assets presented as discontinued operations in the condensed consolidated balance sheets were as follows (in thousands):

໿

	Predecessor
	December 31, 2017
Assets associated with discontinued operations:
Current assets
Cash	$	61
Accounts receivable	4,980
Other receivables	154
Total current assets	5,195
Noncurrent assets
Investments in LLC - Cost	9,000
Proved oil and natural gas properties, net	15,408
Unproved properties, net	15,504
Land	2,706
Other long-term assets	1,167
Total noncurrent assets	43,785
Total assets associated with discontinued operations	$	48,980
Liabilities associated with discontinued operations:
Current liabilities
Accounts payable and accrued liabilities	$	7,882
Asset retirement obligations	7,537
Total current liabilities	15,419
Noncurrent liabilities
Asset retirement obligations, net of current	37,049
Founder notes	28,166
Other long-term liabilities	1,647
Total noncurrent liabilities	66,862
Total liabilities associated with discontinued operations	$	82,281

The operating results directly related to the non-STACK assets and liabilities presented as discontinued operations within the condensed consolidated financial statements were as follows (in thousands):

໿

	Predecessor
	Three Months Ended September 30, 2017			January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Operating revenues and other:
Oil	$	10,994		$	1,617		$	36,122
Natural gas	2,376			1,023			7,964
Natural gas liquids	571			236			1,613
Other revenues	72			16			274
Total operating revenues	14,013			2,892			45,973
Loss on sale of assets	—			(1,923		)	—
Gain on acquisition of oil and gas properties	—			—			1,626
Total operating revenues and other	14,013			969			47,599
Operating expenses:
Lease operating expense	6,888			1,770			21,944
Marketing and transportation expense	352			83			1,080
Production taxes	1,443			167			5,100
Workover expense	273			127			1,981
Exploration expense	1,874			—			8,042
Depreciation, depletion and amortization	4,625			630			16,835
Impairment expense	82			5,560			28,018
Accretion expense	287			101			1,213
General and administrative expense	13			21			60
Total operating expenses	15,837			8,459			84,273
Other income (expense)
Interest expense	(305		)	(103		)	(904		)
Interest income and other	88			—			88
Total other income (expense)	(217		)	(103		)	(816		)
Loss from discontinued operations, net of state income taxes	$	(2,041	)	$	(7,593	)	$	(37,490	)

The total operating and investing cash flows of the non-STACK assets were as follows (in thousands):

໿

	Predecessor
	January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Total operating cash flows of discontinued operations	$	(6,838	)	$	16,166
Total investing cash flows of discontinued operations	(570		)	(15,950		)

XML

Fair Value Measurements

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Fair Value Measurements

FAIR VALUE MEASUREMENTS

We follow ASC 820, which provides a hierarchy of fair value measurements based on the inputs to the fair value estimation process. It requires disclosure of fair values classified according to defined “levels,” which are based on the reliability of the evidence used to determine fair value, with Level 1 being the most reliable and Level 3 the least reliable. Level 1 evidence consists of observable inputs, such as quoted prices in an active market. Level 2 inputs typically correlate the fair value of the asset or liability to a similar, but not identical item which is actively traded. Level 3 inputs include at least some unobservable inputs, such as valuation models developed using the best information available in the circumstances.

In connection with our acquisition, we recorded the fair value of our $500.0 million unsecured senior notes at $533.6 million as of the acquisition date. We have estimated the fair value of our senior notes to be $476.3 million at September 30, 2018 (Successor).  This estimation was based on the most recent trading values of the senior notes at or near the reporting date, which is a Level 1 determination. See Note 11— Long-Term Debt, Net for information on long-term debt.

We utilize the modified Black-Scholes and the Turnbull Wakeman option pricing models to estimate the fair values of oil, natural gas and natural gas liquids derivative contracts. Inputs to these models include observable inputs from the NYMEX for futures contracts, and inputs derived from NYMEX observable inputs, such as implied volatility of oil, natural gas and natural gas liquids prices. We have classified the inputs used to determine fair values of all our oil, natural gas and natural gas liquids derivative contracts as Level 2.

Oil and natural gas properties are subject to impairment testing and potential impairment write down. During the 2017 Predecessor Period, certain of our oil and natural gas properties with a carrying amount of $3.3 million were written down to their fair value of $2.1 million, resulting in an impairment charge of $1.2 million.  Significant Level 3 assumptions used in the calculation of estimated discounted cash flows in the impairment analysis included our estimate of future oil and natural gas prices, production costs, development expenditures, estimated timing of production of proved reserves, appropriate risk-adjusted discount rates and other relevant data.

New additions to asset retirement obligations result from estimations for new or acquired properties. Such estimations of fair value are based on present value techniques that utilize company-specific information for such inputs as cost and timing of plugging and abandonment of wells and facilities. These inputs are classified as Level 3. We recorded $1.7 million, zero and $1.0 million in additions to asset retirement obligations measured at fair value during the Successor Period, the 2018 Predecessor Period, and the 2017 Predecessor Period, respectively.

The following table presents information about our financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017, and indicates the fair value hierarchy of the valuation techniques we utilized to determine such fair value:

	Level 1	Level 2		Level 3	Total
	(in thousands)
At September 30, 2018: (Successor)
Financial Assets:
Derivative contracts for oil and natural gas	—	$	5,670	—	$	5,670
Financial Liabilities:
Derivative contracts for oil and natural gas	—	$	47,144	—	$	47,144
At December 31, 2017: (Predecessor)
Financial Assets:
Derivative contracts for oil and natural gas	—	$	4,416	—	$	4,416
Financial Liabilities:
Derivative contracts for oil and natural gas	—	$	24,609	—	$	24,609

The amounts above are presented on a gross basis.  We will net the value of assets and liabilities with the same counterparty for purposes of presentation in our condensed consolidated balance sheets where master netting agreements are in place. For additional information on derivative contracts, see Note 9 — Derivative Financial Instruments.

XML

Derivative Financial Instruments

9 Months Ended

Sep. 30, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

DERIVATIVE FINANCIAL INSTRUMENTS

We have entered into forward-swap contracts and collar contracts to reduce our exposure to price risk in the spot market for oil, natural gas and natural gas liquids. From time to time, we also utilize financial basis swap contracts, which address the price differential between market-wide benchmark prices and other benchmark pricing referenced in certain of our oil, natural gas and natural gas liquids sales contracts. Substantially all of our derivative contracts are executed by affiliates of our lenders under the senior secured revolving credit facility described in Note 11 — Long-Term Debt, Net, and are collateralized by the security interests of the respective affiliated lenders in certain of our assets under the senior secured revolving credit facility. The derivative contracts settle monthly and are scheduled to coincide with oil production equivalent to barrels (bbl) per month, natural gas production equivalent to volumes in millions of British thermal units (MMBtu) per month, and natural gas liquids production equivalent to volumes in gallons (gal) per month. The derivative contracts represent agreements between us and the counterparties to exchange cash based on a designated price, or in the case of financial basis hedging contracts, based on a designated price differential between various benchmark prices. Cash settlement occurs monthly. No derivative contracts have been entered into for trading or speculative purposes. 

From time to time, we enter into interest rate swap agreements with financial institutions to mitigate the risk of loss due to changes in interest rates.  As of September 30, 2018, we are not a party to any interest rate swap agreements.

We have not designated any of our derivative contracts as fair value or cash flow hedges.  Accordingly, we use mark-to-market accounting, recognizing changes in the fair value of derivative contracts in the condensed consolidated statements of operations at each reporting date.

Derivative contracts are subject to master netting arrangements and are presented on a net basis in the condensed consolidated balance sheets. This netting can cause derivative assets to be ultimately presented in a liability account on the condensed consolidated balance sheets. Likewise, derivative liabilities could be presented in a derivative asset account. 

The following table summarizes the fair value and classification of our derivative instruments, none of which have been designated as hedging instruments under ASC 815:

Fair Values of Derivative Contracts:

໿

	September 30, 2018 (Successor)
Balance sheet location	Gross fair value of assets		Gross liabilities offset against assets in the Balance Sheet			Net fair value of assets presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current assets	$	2,407	$	(2,407	)	$	—
Derivative financial instruments, long-term assets	3,263		(3,263		)	—
Total	$	5,670	$	(5,670	)	$	—

໿

Balance sheet location	Gross fair value of liabilities		Gross assets offset against liabilities in the Balance Sheet			Net fair value of liabilities presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current liabilities	$	36,803	$	(2,407	)	$	34,396
Derivative financial instruments, long-term liabilities	10,341		(3,263		)	7,078
Total	$	47,144	$	(5,670	)	$	41,474

໿

	December 31, 2017 (Predecessor)
Balance sheet location	Gross fair value of assets		Gross liabilities offset against assets in the Balance Sheet			Net fair value of assets presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current assets	$	1,406	$	(1,190	)	$	216
Derivative financial instruments, long-term assets	3,010		(3,002		)	8
Total	$	4,416	$	(4,192	)	$	224

໿

Balance sheet location	Gross fair value of liabilities		Gross assets offset against liabilities in the Balance Sheet			Net fair value of liabilities presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current liabilities	$	20,493	$	(1,190	)	$	19,303
Derivative financial instruments, long-term liabilities	4,116		(3,002		)	1,114
Total	$	24,609	$	(4,192	)	$	20,417

The following table summarizes the effect of our derivative instruments in the condensed consolidated statements of operations (in thousands):

໿

	Successor			Predecessor			Successor			Predecessor
Derivatives not	Three			Three			February 9, 2018			January 1, 2018		Nine
designated as hedging	Months Ended			Months Ended			Through			Through		Months Ended
instruments under ASC 815	September 30, 2018			September 30, 2017			September 30, 2018			February 8, 2018		September 30, 2017
Gain (loss) on derivative contracts
Oil commodity contracts	$	(12,339	)	$	(10,873	)	$	(63,630	)	$	5,431	$	31,665
Natural gas commodity contracts	1,127			1,035			553			1,867		6,763
Natural gas liquids commodity contracts	—			(630		)	—			—		(404		)
Total gain (loss) on derivative contracts	$	(11,212	)	$	(10,468	)	$	(63,077	)	$	7,298	$	38,024

The Company periodically monitors the creditworthiness of its counterparties. Although our counterparties provide no collateral, the master derivative agreements with each counterparty effectively allow us, under certain circumstances, to set-off an unpaid hedging agreement receivable against the interest of the counterparty in any outstanding balance under the senior secured revolving credit facility described in Note 11 — Long-Term Debt, Net.

If a counterparty were to default on payment of an obligation under the master derivative agreements, we could be exposed to commodity price fluctuations, and the protection intended by the derivative could be lost. The value of our derivative financial instruments would be impacted.

We had the following open derivative contracts for crude oil at September 30, 2018:

OIL DERIVATIVE CONTRACTS

໿

໿

	Volume in bbls	Weighted Average		Range
Settlement Period and Type of Contract				High		Low
2018
Price Swap Contracts	552,000	$	53.55	$	61.26	$	50.27
Collar Contracts
Short Call Options	552,000	61.28		64.60		60.50
Long Put Options	552,000	51.67		60.00		50.00
Short Put Options	552,000	42.08		52.50		40.00
2019
Price Swap Contracts	182,500	63.03		63.03		63.03
Collar Contracts
Short Call Options	2,701,000	66.31		75.20		56.50
Long Put Options	2,883,500	53.80		62.00		50.00
Short Put Options	2,883,500	42.72		52.00		37.50
2020
Collar Contracts
Short Call Options	366,000	67.00		73.80		60.20
Long Put Options	1,317,600	56.46		62.50		50.00
Short Put Options	1,317,600	45.83		50.00		40.00

We had the following open derivative contracts for natural gas at September 30, 2018:

NATURAL GAS DERIVATIVE CONTRACTS

໿

	Volume in MMBtu	Weighted Average		Range
Settlement Period and Type of Contract				High		Low
2018
Price Swap Contracts	1,842,500	$	2.95	$	3.09	$	2.75
Collar Contracts
Short Call Options	1,832,500	3.36		3.75		3.14
Long Put Options	1,527,500	2.89		2.90		2.75
Short Put Options	610,000	2.40		2.40		2.40
2019
Price Swap Contracts	10,905,000	2.69		3.09		2.64
Collar Contracts
Short Call Options	4,000,000	3.31		3.75		3.17
Long Put Options	3,550,000	2.81		2.90		2.70
Short Put Options	2,425,000	2.27		2.40		2.20
2020
Collar Contracts
Short Call Options	2,275,000	3.19		3.20		3.17
Long Put Options	9,150,000	2.57		2.70		2.50
Short Put Options	9,150,000	2.07		2.20		2.00
2021
Collar Contracts
Long Put Options	2,250,000	2.65		2.65		2.65
Short Put Options	2,250,000	2.15		2.15		2.15

In those instances where contracts are identical as to time period, volume and strike price, and counterparty, but opposite as to direction (long and short), the volumes and average prices have been netted in the two tables above.  Prices stated in the table above for oil may settle against either the NYMEX index or may reflect a mix of positions settling on various combinations of these benchmarks.

We had the following open financial basis swaps at September 30, 2018:

NATURAL GAS BASIS SWAP DERIVATIVE CONTRACTS

Volume in MMBtu(1)	Reference Price 1 (1)	Reference Price 2 (1)	Period			Weighted Average Spread ($ per MMBtu)
460,000	OneOK	NYMEX Henry Hub	Jul '19	—	Dec '19	$	(0.93	)
4,445,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Oct '18	—	Dec '18	(0.63		)
17,950,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Jan '19	—	Dec '19	(0.68		)
910,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Jan '20	—	Mar '20	(0.49		)
152,500	San Juan	NYMEX Henry Hub	Nov '18	—	Dec '18	(0.47		)
2,365,000	San Juan	NYMEX Henry Hub	Jan '19	—	Oct '19	(0.78		)

_________________

(1) Represents short swaps that fix the basis differentials between OneOK, Tex/OKL Panhandle Eastern Pipeline (“PEPL”), San Juan and NYMEX Henry Hub.

OIL BASIS SWAP DERIVATIVE CONTRACTS

໿

Volume in bbl (1)	Reference Price 1 (1)	Reference Price 2 (1)	Period			Weighted Average Spread ($ per bbl)
552,000	CMA Oil	WTI	Oct '18	—	Dec '18	$	(0.54	)

_________________

(1) Represents basis swaps for the basis differentials between NYMEX CMA (Calendar Monthly Average) Roll that reconcile the trade month versus the delivery month for physical contract pricing and West Texas Intermediate (“WTI”).

XML

Asset Retirement Obligations

9 Months Ended

Sep. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligations

ASSET RETIREMENT OBLIGATIONS

A summary of the changes in asset retirement obligations is included in the table below (in thousands):

໿

	2018
Balance, as of January 1 (Predecessor)	$	10,469
Liabilities settled	(63		)
Revisions to estimates	63
Accretion expense	39
Balance, as of February 8 (Predecessor)	$	10,508
Balance, as of February 9 (Successor)	$	—
Liabilities assumed from Business Combination	5,998
Liabilities incurred	1,689
Liabilities settled	(1,249		)
Liabilities transferred in sale of properties	(20		)
Revisions to estimates (1)	3,562
Accretion expense	489
Balance, as of September 30 (Successor)	10,469
Less: Current portion	1,300
Long-term portion	$	9,169

⁽¹⁾The total revisions included $3.0 million related to additions to property, plant and equipment for the Successor Period.

XML

Long Term Debt, Net

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Long Term Debt, Net

LONG-TERM DEBT, NET

Long-term debt, net consisted of the following (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Senior secured revolving credit facility	$	80,000	$	117,065
7.875% senior unsecured notes due 2024	500,000		500,000
Unamortized premium on senior unsecured notes	30,354		—
Unamortized deferred financing costs	—		(9,625		)
Total long-term debt, net	$	610,354	$	607,440

Senior Secured Revolving Credit Facility (Successor). In connection with the consummation of the Business Combination, all indebtedness at that time under the senior secured revolving credit facility was repaid in full. On February 9, 2018, and in connection with the closing of the AM Contribution Agreement (as described in Note 5), we entered into the Eighth Amended and Restated Credit Agreement with Wells Fargo Bank, National Association, as the administrative agent (the “Eighth A&R credit facility”). The Eighth A&R credit facility is for an aggregate maximum credit amount of $1.0 billion with an initial $350.0 million borrowing base. In April 2018, our borrowing base was increased to $400.0 million. This borrowing base was reaffirmed by the lenders subsequent to September 30, 2018. The next scheduled redetermination will occur in April 2019, at which time the borrowing base may be increased, lowered or stay the same. The Eighth A&R credit facility does not permit us to borrow funds if, at the time of such borrowing, we are not in compliance with the financial covenants set forth in the Eighth A&R credit facility. As of September 30, 2018, we had $80.0 million of borrowings outstanding under the Eighth A&R credit facility and had $21.9 million of outstanding letters of credit, leaving a total borrowing capacity of $298.1 million remaining available for future use.

The principal amounts borrowed are payable on the maturity date of February 9, 2023. We have a choice of borrowing in Eurodollars or at the reference rate, with such borrowings bearing interest, payable quarterly for reference rate loans or, for Eurodollar loans, in one, three or six-month tranches. Eurodollar loans bear interest at a rate per annum equal to the applicable LIBOR rate, plus a margin ranging from 2.00% to 3.00%.  Reference rate loans bear interest at a rate per annum equal to the greater of (i) the agent bank’s reference rate, (ii) the federal funds effective rate plus 50 basis points or (iii) the rate for one-month Eurodollar loans plus 1.00%, plus a margin ranging from 1.00% to 2.00%.  

The amounts outstanding under the Eighth A&R credit facility are secured by the first priority liens on substantially all of the Company’s, and its material operating subsidiaries’, oil and natural gas properties and associated assets and all of the equity of our material operating subsidiaries that are guarantors of the Eighth A&R credit facility. Additionally, SRII Opco and AMH GP have pledged their respective limited partner interests in us as security for our obligations. If an event of default occurs under the Eighth A&R credit facility, the administrative agent will have the right to proceed against the pledged collateral and take control of substantially all of our assets and our material operating subsidiaries that are guarantors.

The Eighth A&R credit facility, as amended effective August 13, 2018, contains restrictive covenants that may limit our ability to, among other things, incur additional indebtedness, sell assets, guaranty or make loans to others, make investments, enter into mergers, make certain payments and distributions in excess of specific amounts, enter into or be party to hedge agreements, amend organizational documents, incur liens and engage in certain other transactions without the prior consent of the lenders. The Eighth A&R credit facility permits us to make distributions to any parent entity (i) to pay for reimbursement of third party costs and general and administrative expenses (“G&A”) incurred in the ordinary course of business by such parent entity or (ii) in order to permit such parent entity to (x) make permitted tax distributions and (y) pay the obligations under the tax receivable agreement.

The Eighth A&R credit facility also requires us to maintain the following two financial ratios:

• a current ratio, subject to various adjustments as defined in the Eighth A&R credit facility, tested quarterly, commencing with the fiscal quarter ended June 30, 2018, of our consolidated current assets to our consolidated current liabilities of not less than 1.0 to 1.0 as of the end of each fiscal quarter; and

• a leverage ratio, tested quarterly, commencing with the fiscal quarter ended June 30, 2018, of our consolidated debt (other than obligations under hedge agreements) as of the end of such fiscal quarter to our consolidated EBITDAX annualized by multiplying EBITDAX for the period of (a) the fiscal quarter ended June 30, 2018 times 4, (b) the two fiscal quarter periods ended September 30, 2018 times 2 (c) the three fiscal quarter periods ending December 31, 2018 times 4/3rds and (d) for each fiscal quarter on or after March 31, 2019, EBITDAX for the four-fiscal quarter period then ended, of not greater than 4.0 to 1.0.

As of September 30, 2018, we were in compliance with the financial ratios described above.

Senior Secured Revolving Credit Facility (Predecessor).  As of December 31, 2017, the Company had $117.1 million of borrowings outstanding.  At the date of the Business Combination, the outstanding balance under our credit facility was paid off.

Senior Unsecured Notes. We have $500.0 million in aggregate principal amount of 7.875% senior unsecured notes (the “senior notes”) which were issued at par by us and our wholly owned subsidiary Alta Mesa Finance Services Corp. (collectively, the “Issuers”) during the fourth quarter of 2016.  The senior notes were issued in a private placement but were exchanged for substantially identical registered senior notes in November 2017. 

The senior notes will mature on December 15, 2024, and interest is payable semi-annually on June 15 and December 15 of each year. At any time prior to December 15, 2019, we may, from time to time, redeem up to 35% of the aggregate principal amount of the senior notes for an amount of cash not greater than the net cash proceeds from certain equity offerings at a redemption price of 107.875% of the principal amount, plus accrued and unpaid interest, if any, to the date of redemption, if at least 65% of the aggregate principal amount of the senior notes remains outstanding after such redemption and the redemption occurs within 120 days of the closing date of such equity offering. At any time prior to December 15, 2019, we may, on any one or more occasions, redeem all or part of the senior notes for cash at a redemption price equal to 100% of their principal amount of the senior notes redeemed plus an applicable make-whole premium and accrued and unpaid interest, if any, to the date of redemption. Upon the occurrence of certain kinds of change of control, each holder of the senior notes may require us to repurchase all or a portion of the senior notes for cash at a price equal to 101% of the aggregate principal amount of the senior notes, plus accrued and unpaid interest, if any, to the date of repurchase. On and after December 15, 2019, we may redeem the senior notes, in whole or in part, at redemption prices (expressed as percentages of principal amount) equal to 105.906% for the twelve-month period beginning on December 15, 2019, 103.938% for the twelve-month period beginning on December 15, 2020, 101.969% for the twelve-month period beginning on December 15, 2021 and 100.000% beginning on December 15, 2022, plus accrued and unpaid interest, if any, to the date of redemption.

The senior notes are fully and unconditionally guaranteed on a senior unsecured basis by each of our material subsidiaries, subject to certain customary release provisions. Accordingly, they will rank equal in right of payment to all of our existing and future senior indebtedness; senior in right of payment to all of our existing and future indebtedness that is expressly subordinated to the senior notes or the respective guarantees; effectively subordinated to all of our existing and future secured indebtedness to the extent of the value of the collateral securing such indebtedness, including amounts outstanding under our credit facility; and structurally subordinated to all existing and future indebtedness and obligations of any of our subsidiaries that do not guarantee the senior notes.

The senior notes contain certain covenants limiting the Issuers’ ability and the ability of the Restricted Subsidiaries (as defined in the indenture governing the senior notes to, under certain circumstances, prepay subordinated indebtedness, pay distributions, redeem stock or make certain restricted investments; incur indebtedness; create liens on the Issuers’ assets to secure debt; restrict dividends, distributions or other payments; enter into transactions with affiliates; designate subsidiaries as unrestricted subsidiaries; sell or otherwise transfer or dispose of assets, including equity interests of restricted subsidiaries; effect a consolidation or merger; and change our line of business. 

Under the terms of the indenture for the senior notes, if we experience certain specific change of control events, unless the Issuers have previously or concurrently exercised their right to redeem all of the senior notes under the optional redemption provision, such holder has the right to require us to purchase such holder’s senior notes at 101% of the principal amount plus accrued and unpaid interest to the date of the purchase.  The closing of the Business Combination with AMR did not constitute a change of control under the indenture governing the senior notes because certain existing owners of the Company and SRII Opco entered into an amended and restated voting agreement with respect to the voting interests in AMH GP.  See Note 5 — Business Combination to the consolidated condensed financial statements for further detail.

The indenture contains customary events of default, including: 

• default in any payment of interest on the senior notes when due, continued for 30 days;

• default in the payment of principal or premium, if any, on the senior notes when due;

• failure by the Issuers or any subsidiary guarantor to comply with its obligations under the indenture;

• default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any indebtedness for money borrowed by the Issuers or restricted subsidiaries;

• certain events of bankruptcy, insolvency or reorganization of the Issuers or restricted subsidiaries; and

• failure by the Issuers or certain subsidiaries that would constitute a payment of final judgment aggregating in excess of $20 million.

If an event of default occurs and is continuing, the holders of such indebtedness may elect to declare all the funds borrowed to be immediately due and payable with accrued and unpaid interest.  Borrowings under other debt instruments that contain cross-acceleration or cross-default provisions may also be accelerated and become due and payable.

As of September 30, 2018, we were in compliance with the indentures governing the senior notes.

Bond Premium (Successor). As discussed in Note 5, the fair value of our senior notes as of the acquisition date was $533.6 million.  The bond premium of $33.6 million is being amortized over the respective term of the senior notes.  The bond premium amortization recognized in interest expense was $1.2 million and $3.3 million for the three months ended September 30, 2018 (Successor) and the Successor Period, respectively. The unamortized bond premium related to the senior notes is included as a component of long-term debt in the condensed consolidated balance sheet as of September 30, 2018. 

Deferred financing costs. As of December 31, 2017 (Predecessor), we had $11.4 million of unamortized deferred financing costs related to both our senior secured notes and the Eighth A&R credit facility. As a result of the Business Combination, our unamortized deferred financing costs were adjusted to a fair value of zero at February 9, 2018.  During the Successor Period, we incurred additional deferred financing costs related to the Eighth A&R credit facility of $1.4 million. These costs are reflected as deferred financing costs, net in other noncurrent assets in the condensed consolidated balance sheets as of September 30, 2018 (Successor). The amortization of the deferred financing costs is included in interest expense in the consolidated statements of operations. For the three months ended September 30, 2018 (Successor) and 2017 (Predecessor), the amortization of deferred financing costs was $0.1 million and $0.7 million, respectively. For the Successor Period, the 2018 Predecessor Period and the 2017 Predecessor Period, the amortization of deferred financing costs was $0.2 million, $0.2 million and $2.2 million, respectively.

XML

Accounts Payable And Accrued Liabilities

9 Months Ended

Sep. 30, 2018

Payables and Accruals [Abstract]

Accounts Payable And Accrued Liabilities

ACCOUNTS PAYABLE AND ACCRUED LIABILITIES

The following provides the details of accounts payable and accrued liabilities (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Accruals for capital expenditures	$	83,687	$	48,771
Revenues and royalties payable	44,626		29,514
Accruals for operating expenses/taxes	8,156		14,632
Accrued interest	11,651		2,587
Derivative settlement payable	4,593		2,106
Other	3,408		4,301
Total accrued liabilities	156,121		101,911
Accounts payable	71,018		68,578
Accounts payable and accrued liabilities	$	227,139	$	170,489

XML

Commitments And Contingencies

9 Months Ended

Sep. 30, 2018

Commitments and Contingencies Disclosure [Abstract]

Commitments And Contingencies

COMMITMENTS AND CONTINGENCIES

Commitments

We lease office space and certain field equipment such as compressors, under long-term operating lease agreements.  On April 1, 2018, we amended the lease agreement for our corporate headquarters located in Houston, Texas.  The amended lease agreement provides for additional office space and extends the original lease term through April 2028.  Due to the amendment, we have additional lease commitment obligations of approximately $17.6 million through April 2028. Any initial rent-free months are amortized over the life of the lease.

The Company has entered into certain firm transportation contracts that extend through 2028.  At September 30, 2018, the future minimum commitments related to these contracts were approximately $5.7 million a year.

Contingencies

Environmental claims. Various landowners have sued us in lawsuits concerning several fields in which we have, or historically had, operations.  The lawsuits seek injunctive relief and other relief, including unspecified amounts in both actual and punitive damages for alleged breaches of mineral leases and alleged failure to restore the plaintiffs’ lands from alleged contamination and otherwise from our oil and natural gas operations. We are unable to express an opinion with respect to the likelihood of an unfavorable outcome of the various environmental claims or to estimate the amount or range of potential loss should the outcome be unfavorable. Therefore, we have not provided any material amounts for these claims in our condensed consolidated financial statements at September 30, 2018.

Title/lease disputes. Title and lease disputes may arise in the normal course of our operations. These disputes are usually small but could result in an increase or decrease in reserves and/or other forms of settlement, such as cash, once a final resolution to the title dispute is made.

Litigation (Predecessor). On April 13, 2005, Henry Sarpy and several other plaintiffs (collectively, “Plaintiffs”) filed a petition against Exxon, Extex, The Meridian Resource Corporation (“TMRC,” our former subsidiary), and the State of Louisiana for contamination of their land in the New Sarpy and/or Good Hope Field in St. Charles Parish.  Plaintiffs claimed they are owners of land upon which oil field waste pits containing dangerous and contaminating substances are located.  Plaintiffs alleged that they discovered in May 2004 that their property is contaminated with oil field wastes greater than represented by Exxon.  The property was originally owned by Exxon and was sold to TMRC.  TMRC subsequently sold the property to Extex.  On April 14, 2015, TMRC entered into a Memorandum of Understanding with Exxon to settle the claims in this ongoing matter.  On July 10, 2015, the settlement and comprised agreements were finalized and signed by the Plaintiffs and Exxon.  On July 28, 2015, the State of Louisiana issued a letter of no objection to the settlement.  In connection with the Business Combination, the liability was included in the distribution of our non-STACK assets to the AM Contributor.

On January 25, 2017, Bollenbach Enterprises Limited Partnership filed a class action petition in Kingfisher County, Oklahoma against Oklahoma Energy Acquisitions, LP and Alta Mesa Services, LP, each a wholly owned subsidiary, and us (collectively, the “AMH Parties”) claiming royalty underpayment or non-payment of royalty.  The suit alleged that the AMH Parties made improper post production deductions that resulted in underpayment of royalties on natural gas and/or constituents of the gas stream produced from wells.  The case was moved to federal court and stayed by the court pending the parties’ efforts to settle the case.  In June 2017, the court administratively closed the case following mediation.  As of December 31, 2017, we had accruals of approximately $4.7 million in accounts payable and accrued liabilities in our condensed consolidated balance sheets and in G&A in our condensed consolidated statements of operations as a result of this litigation.  During January 2018, approximately $4.7 million was paid to fund the settlement. On March 12, 2018, the class settlement was approved by the Court.  

Litigation (Successor). On March 1, 2017, Mustang Gas Products, LLC (“Mustang”) filed suit in the District Court of Kingfisher County, Oklahoma, against Oklahoma Energy Acquisitions, LP, and eight other entities, including us. Mustang alleges that (1) Mustang is a party to gas purchase agreements with Oklahoma Energy containing gas dedication covenants that burden land, leases and wells in Kingfisher County, Oklahoma, and (2) Oklahoma Energy, in concert with the other defendants, has wrongfully diverted gas sales to us in contravention of these agreements. Mustang asserts claims for declaratory judgment, anticipatory repudiation and breach of contract against Oklahoma Energy only. Mustang also claims tortious interference with contract, conspiracy and unjust enrichment/constructive trust against all defendants, including us. We believe that the allegations contained in this lawsuit are without merit and intend to vigorously defend ourselves.

Other contingencies. We are subject to legal proceedings, claims and liabilities arising in the ordinary course of business.  The outcomes cannot be reasonably estimated; however, in the opinion of management, such litigation and claims will be resolved without material adverse effect on our financial position, results of operations or cash flows. Accruals for losses associated with litigation are made when losses are deemed probable and can be reasonably estimated.

Performance appreciation rights.  In the third quarter of 2014, we adopted the Alta Mesa Holdings, LP Amended and Restated Performance Appreciation Rights Plan (the “Plan”), effective September 24, 2014.  The Plan was intended to provide incentive compensation to key employees and consultants who make significant contributions to the Company.  Under the Plan, participants were granted performance appreciation rights (“PARs”) with a stipulated initial designated value. The Company accelerated the vesting and payment of all outstanding PARs in connection with the Business Combination with AMR as described in Note 5.  The value of the PARs that vested was approximately $10.9 million and such amount was recorded in G&A in the Successor Period.  Following the closing of the Business Combination, the Plan was terminated.

Nonqualified Deferred Compensation.  In 2013, we established a nonqualified deferred compensation plan, the Alta Mesa Holdings, L.P. Supplemental Executive Retirement Plan (the “Retirement Plan”).  The Retirement Plan was intended to provide additional flexibility and tax planning advantages to our senior executives and other key highly compensated employees. In connection with the Business Combination, we terminated the Retirement Plan resulting in approximately $9.4 million being recorded in G&A in the Successor Period. 

XML

Significant Risks And Uncertainties

9 Months Ended

Sep. 30, 2018

Risks and Uncertainties [Abstract]

Significant Risks And Uncertainties

SIGNIFICANT RISKS AND UNCERTAINTIES

Our business makes us vulnerable to changes in wellhead prices of oil and natural gas. Historically, world-wide oil and natural gas prices and markets have been volatile, and may continue to be volatile in the future. Prices for oil and natural gas can fluctuate widely in response to relatively minor changes in the global and regional supply of and demand for oil and natural gas, as well as market uncertainty, economic conditions and a variety of additional factors. The duration and magnitude of changes in oil and natural gas prices cannot be predicted. Declines in oil and/or natural gas prices or any other unfavorable market conditions could have a material adverse effect on our financial condition and on the carrying value of our proved oil and natural gas reserves. Low prices may also reduce our cash available for distribution, acquisitions and for servicing our indebtedness. We mitigate some of this vulnerability by entering into oil, natural gas, and natural gas liquids price derivative contracts. See Note 9 — Derivative Financial Instruments for further details on derivatives.

XML

Partners' Capital

9 Months Ended

Sep. 30, 2018

Partners' Capital [Abstract]

Partners' Capital

PARTNERS’ CAPITAL

Management and Control:   Our Seventh Amended and Restated Agreement of Limited Partnership (the “Seventh Amended Partnership Agreement”) currently provides for interests to be divided into economic units held by the partners referred to as “LP Units” and non-economic general partner interests owned by AMH GP referred to as “GP Units”.  AMH GP owns all the GP Units and in connection with the Business Combination, SRII Opco owns all the LP Units. 

As a limited partnership, our operations and activities are managed by the board of directors (the “Board of Directors”) of our general partner, AMH GP.  The limited liability company agreement of AMH GP provides for two classes of interests: (i) Class A Units, which hold 100% of the economic interests in AMH GP and (ii) Class B Units, which hold 100% of the voting interests in AMH GP.

SRII Opco is the sole owner of Class A Units and owns 90% of the Class B Units.  Harlan H. Chappelle, our Chief Executive Officer and a director, Michael Ellis, the founder, our Chief Operating Officer and a director and certain affiliates of Bayou City Energy Management, LLC, a Delaware limited liability company, and HPS Investment Partners, LLC, a Delaware limited liability company, own an aggregate 10% of the Class B Units.  AMH GP’s Board of Directors are selected by the Class B members.  Notwithstanding the foregoing, voting control of AMH GP is vested in SRII Opco pursuant to a voting agreement.

The Seventh Amended Partnership Agreement specifies the manner in which we will make cash distribution to our partners.  When AMH GP so directs, we shall make distributions of Net Cash Flow (as defined in the Seventh Amended Partnership Agreement) to the limited partner.

XML

Equity Based Compensation (Successor)

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Equity Based Compensation (Successor)

EQUITY-BASED COMPENSATION (Successor)

Following the closing of the Business Combination, AMR adopted the Alta Mesa Resources, Inc. 2018 Long Term Incentive Plan (the “LTIP”).  A total of 50,000,000 shares of AMR’s Class A Common Stock were reserved for issuance under the LTIP.  The LTIP provides for the grant of stock options, including incentive stock options (“ISOs”), nonqualified stock options (“NSOs”), stock appreciation rights (“SARs”), restricted stock, dividend equivalents, restricted stock units (“RSUs”) and other stock-based awards in AMR’s Class A Common Stock.  Prior to the Business Combination, we did not have any equity-based compensation programs. Pursuant to the LTIP, certain grants of stock-based awards have been made to various employees of the Company since February 9, 2018.  During the Successor Period, we recognized non-cash stock-based compensation expense of $6.7 million resulting from stock options, restricted stock, and RSUs awards granted to our employees, which is included in general and administrative expense in the accompanying condensed consolidated statements of operations.  Historical amounts may not be representative of future amounts as the value of future awards may vary from historical amounts.

We recognize compensation expense on a straight-line basis for service-based grants to our employees over the vesting period.  The fair value of restricted stock awards and performance-based restricted stock units is determined based on the estimated fair market value of AMR’s Class A Common Stock on the date of grant. As provided in ASU 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting, the Company has elected to recognize actual forfeitures as they occur.

Stock options.  Options that have been granted under the LTIP expire seven years from the grant date and generally vest in one-third increments each year on the anniversary date following the date of grant, based on continued employment. The exercise price for an option granted under the LTIP may not be below the fair value of AMR’s Class A Common Stock on the grant date.  

Information about outstanding stock options is summarized in the table below:

໿

	Successor
	Stock Options		Weighted Average Grant - Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of February 9, 2018	—		$	—	—
Granted	4,704,433		4.45		—
Exercised	—		—		—
Forfeited or expired	(94,693	)	4.52		—
Outstanding as of September 30, 2018	4,609,740		$	4.44	6.4	$	—
Exercisable as of September 30, 2018	—		$	—	—	$	—

Compensation cost related to stock options is based on the grant-date fair value of the award, recognized ratably over the applicable three-year vesting period.  The Company estimates the fair value using the Black-Scholes option-pricing model. Expected volatilities are based on the re-levered asset volatility implied by a set of comparable companies.  Expected term is based on the simplified method, and is estimated as the average of the weighted average vesting term and the time to expiration as of the grant date.  The Company uses U.S. Treasury bond rates in effect at the grant date for its risk-free interest rates.

The following summarizes the assumptions used to determine the fair value of those options:

໿

	Successor
	February 9, 2018 Through September 30, 2018
Expected term (in years)	4.5
Expected stock volatility	64.6	%
Dividend yield	—
Risk-free interest rate	2.4	%

As of September 30, 2018, there was $16.2 million of unrecognized compensation cost related to non-vested stock options.  The Company expects to recognize that cost on a pro rata basis over a weighted average period of 2.4 years.

Restricted stock. Restricted stock granted to employees generally vests in one-third increments each year on the anniversary date following the date of grant, based on continued employment. Prior to vesting, no dividends are paid and the shares may not be traded.

The following table provides information about restricted stock awards granted during the Successor Period:

໿

	Successor
	Restricted Stock Awards		Weighted Average Grant Date Fair Value per share
Outstanding as of February 9, 2018	—		$	—
Granted	1,658,756		7.77
Vested	—		—
Forfeited or expired	(42,086	)	8.74
Outstanding as of September 30, 2018	1,616,670		$	7.75

Compensation cost for restricted shares is based upon the grant-date market value of the award, recognized ratably over the applicable three-year vesting period, subject to the employee’s continued service.  Unrecognized compensation cost related to unvested restricted shares at September 30, 2018 was $10.1 million, which the Company expects to recognize over a weighted average remaining period of 2.5 years.

Restricted stock units. The Company also grants performance-based restricted stock units (“PSUs”) to key employees under the LTIP. PSUs granted during the period will vest over three years at 20% during the first year, 30% during the second year and 50% during the third year. The number of PSUs vesting each year will be based on the achievement of annual company-specified performance goals and objectives applicable to each respective year of vesting. Based on achievement of those goals and objectives, the number of PSUs that vest can range from 0% to 200% of the target grant applicable to each vesting period. For accounting purposes, the Company will only recognize PSUs granted when the specified performance thresholds for future periods have been established. For PSUs granted during the period February 9, 2018 to September 30, 2018, only the performance goals and objectives for 2018 have been established to date. Those 2018 performance goals are related to the Company achieving a specified level of EBITDAX for the period ended December 31, 2018.

The following summary provides information about the target number of PSUs granted during the Successor Period:

	Successor
	PSUs			Weighted Average Grant - Date Fair Value per unit
Outstanding as of February 9, 2018	—			$	—
Granted	781,200			8.69
Vested	—			—
Forfeited or expired	(4,174	)		8.45
Outstanding as of September 30, 2018	777,026		—	$	8.69

As of September 30, 2018, there was no material unrecognized compensation cost related to the unvested PSUs.

XML

Related Party Transactions

9 Months Ended

Sep. 30, 2018

Related Party Transactions [Abstract]

Related Party Transactions

RELATED PARTY TRANSACTIONS

On January 13, 2016, Alta Mesa’s wholly owned subsidiary Oklahoma Energy Acquisitions, LP (“Oklahoma Energy”) entered into a Joint Development Agreement, as amended on June 10, 2016 and December 31, 2016, (the “Joint Development Agreement”), with BCE-STACK Development LLC (“BCE”), a fund advised by Bayou City, to fund a portion of Alta Mesa’s drilling operations and to allow Alta Mesa to accelerate development of our STACK acreage.  The Joint Development Agreement, as amended, establishes a development plan of 60 wells in three tranches, and provides opportunities for the parties to potentially agree to an additional 20 wells. 

Pursuant to the terms and provisions of the Joint Development Agreement, BCE committed to fund 100% of Alta Mesa’s working interest share up to a maximum average well cost of $3.2 million in drilling and completion costs per well for any tranche, subject to modifications or adjustments proposed and approved by the parties. We are responsible for any drilling and completion costs exceeding approved amounts. In exchange for the payment of drilling and completion costs, BCE receives 80% of our working interest in each wellbore, which BCE interest will be reduced to 20% of our initial working interest upon BCE achieving a 15% internal rate of return on the wells within a tranche and automatically further reduced to 12.5% of our initial interest upon BCE achieving a 25% internal rate of return.  Following the completion of each joint well, Alta Mesa and BCE will each bear its respective proportionate working interest share of all subsequent costs and expenses related to such joint well.  Mr. William McMullen, one of our former directors, is founder and managing partner of BCE. The approximate dollar value of the amount involved in this transaction, or Mr. McMullen’s interests in the transaction, depends on a number of factors outside his control and is not known at this time.  During the 2018 Predecessor Period, BCE advanced us approximately $39.5 million to drill wells under the Joint Development Agreement. As of September 30, 2018, 55 joint wells have been drilled or spudded. As of September 30, 2018 (Successor), and December 31, 2017 (Predecessor), $16.9 million and $23.4 million, respectively, of net advances remaining from BCE for their working interest share of the drilling and development costs arising under the Joint Development Agreement were included as “Advances from related party” in our consolidated balance sheets. BCE may request refunds of certain advances from time to time if funded wells previously on the drilling schedule were subsequently removed.

On August 31, 2015, Oklahoma Energy entered into a Crude Oil Gathering Agreement (the “Crude Oil Gathering Agreement”) and Gas Gathering and Processing Agreement (the “Gas Gathering and Processing Agreement”) with Kingfisher. The Gas Gathering and Processing Agreement was subsequently amended on February 3, 2017, effective as of December 1, 2016, and thereafter amended on June 29, 2018, effective as of April 1, 2018.  The recent amendment to the Gas Gathering and Processing Agreement impacts our net NGL production volumes but will not impact our consolidated financial statements.

Effective June 1, 2018, we entered into a Marketing Services Agreement with ARM Energy Management, LLC (“AEM”) pursuant to which AEM markets our oil, natural gas and natural gas liquids and sells them under short-term contracts generally with month-to-month pricing based on published regional indices, with differentials for transportation, location and quality taken into account. AEM remits monthly collections on these sales to us, and receives a marketing fee. In addition, AEM markets our firm transportation on the ONEOK Gas Transportation, L.L.C. system for an asset management fee. The AM Contributor owns less than 10% of AEM. For the period from June 1, 2018 to September 30, 2018, we paid AEM $0.8 million for our share of the marketing fees.

XML

Subsidiary Guarantors

9 Months Ended

Sep. 30, 2018

Guarantees [Abstract]

Subsidiary Guarantors

SUBSIDIARY GUARANTORS

All of our wholly owned subsidiaries are guarantors under the terms of the senior notes and the Eighth A&R credit facility. Our condensed consolidated financial statements reflect the financial position of these subsidiary guarantors. As the parent company to these subsidiaries, we have no independent operations, assets, or liabilities. The guarantees are full and unconditional (except for customary release provisions) and joint and several.  Those subsidiaries which are not wholly owned by us and are not guarantors of our senior notes or our credit facility, are immaterial subsidiaries.  There are no restrictions on dividends, distributions, loans or other transfers of funds from the subsidiary guarantors to us.

XML

Subsequent Events

9 Months Ended

Sep. 30, 2018

Subsequent Events [Abstract]

Subsequent Events

SUBSEQUENT EVENTS

Sale of Produced Water Assets

Effective November 9, 2018, the Company sold its produced water assets, consisting of over 200 miles of produced water gathering pipelines, and related facilities and equipment, along with 20 produced water disposal wells, surface leases, easements and other agreements, net of related obligations, to a subsidiary of Kingfisher Midstream, LLC, a related party and wholly owned subsidiary of our parent, AMR, for a total purchase price of $90.0 million in cash, subject to normal acquisition adjustments. At September 30, 2018, the net book value of long-lived assets associated with these operations totaled $86.9 million. In conjunction with the sale, the Company entered into a new fifteen-year water gathering and disposal agreement with Kingfisher Midstream.

XML

Summary Of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation. As a result of the Business Combination, AMR was treated as the accounting acquirer and we are the accounting acquiree.  Pursuant to Financial Accounting Standards Board (“FASB”) Accounting Standard Codification (“ASC”) 805, Business Combinations, (“ASC 805”), our identifiable assets acquired and liabilities assumed were provisionally recorded at their estimated fair values on the Closing Date of the Business Combination (also referred to herein as the “acquisition date”).  Fair value adjustments related to the transaction have been pushed down to us resulting in our assets and liabilities being recorded at fair value as of the acquisition date.  As a result of the Transactions described above, the financial statements and certain footnote presentations separate the Company’s presentations into two distinct periods, the period before the consummation of the transaction (“Predecessor”) and the period after that date (“Successor”), to indicate the application of the different basis of accounting between the periods presented.  The Successor periods presented herein are for the three months ended September 30, 2018 and from February 9, 2018 to September 30, 2018 (collectively, “Successor Periods”); and the Predecessor periods presented herein are from January 1, 2018 to February 8, 2018 (“2018 Predecessor Period”), the three months ended September 30, 2017 and the nine months ended September 30, 2017 (“2017 Predecessor Period,” and, together with the 2018 Predecessor Period, the “Predecessor Periods”).

As noted above, we distributed our non-STACK assets and liabilities to the AM Contributor in connection with the closing of the Business Combination.  The distribution of our non-STACK assets and liabilities and the sale of our Weeks Island field during the fourth quarter of 2017 (collectively, the “non-STACK assets”) were part of the Company’s overall strategic shift to operate only in the eastern Anadarko Basin.  As a result, we have classified the assets and liabilities and operating results of the non-STACK assets as discontinued operations during the Predecessor Periods within the condensed consolidated financial statements.  See Note 7 — Discontinued Operations (Predecessor) for further discussion.

Principles of Consolidation and Reporting. The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, the condensed consolidated financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. The condensed consolidated financial statements reflect our accounts after elimination of all significant intercompany transactions and balances.

The condensed consolidated financial statements included herein as of September 30, 2018, and for the three months ended September 30, 2018 (Successor) and the period from February 9, 2018 through September 30, 2018 (Successor), the period from January 1, 2018 through February 8, 2018 (Predecessor) and the three and nine months endedSeptember 30, 2017 (Predecessor), are unaudited, and in the opinion of management, the information furnished reflects all material adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of consolidated financial position and of the results of operations for the interim periods presented.  The condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our annual consolidated financial statements for the year ended December 31, 2017, which were filed with the Securities and Exchange Commission (the “SEC”) in our 2017 Annual Report.  Certain reclassifications of prior period condensed consolidated financial statements have been made to conform to current reporting practices.  The reclassifications had no impact on net income (loss) or partners’ capital. The consolidated results of operations for interim periods are not necessarily indicative of results to be expected for a full year. 

The Company’s condensed consolidated statement of operations subsequent to the Business Combination includes depreciation and amortization expense on the Company’s property and equipment balances resulting from the fair value adjustments made under the new basis of accounting. Certain other items of income and expense were also impacted. Therefore, the Company’s financial information prior to the Business Combination is not comparable to its financial information subsequent to the Business Combination.

Use of Estimates

Use of Estimates. The preparation of 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 condensed consolidated financial statements and the reported amounts of revenues and expenses during the reporting period.

Reserve estimates significantly impact depreciation, depletion, and amortization expense and potential impairments of oil and natural gas properties and are subject to change based on changes in oil and natural gas prices and trends and changes in estimated reserve quantities. Other estimates are utilized to determine amounts related to oil and natural gas revenues, the value of oil and natural gas properties, the value of other property and equipment, bad debts, asset retirement obligations, derivative contracts, accounting for business combinations, state taxes, share-based compensation and contingencies and litigation. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances.  We review estimates and underlying assumptions on a regular basis.  Actual results may differ from these estimates.

Bond Premium on Senior Unsecured Notes

Bond Premium on Senior Unsecured Notes. As a result of the pushdown accounting related to the Business Combination, the Company estimated the fair value of our $500.0 million senior unsecured notes at $533.6 million as of the acquisition date.  The amount in excess of the original principal balance was recorded as a bond premium, which is being amortized as a reduction to interest expense. 

Equity-Based Compensation (Successor)

Equity-Based Compensation (Successor). The Company recognizes compensation related to all stock-based awards in the financial statements based on their estimated grant-date fair value. AMR grants various types of stock-based awards including stock options, restricted stock and performance-based restricted stock units. The fair value of stock option awards is determined using the Black-Scholes option pricing model. Service-based restricted stock awards and performance-based restricted stock units are valued using the market price of AMR’s common stock on the grant date. Compensation cost is recognized ratably over the applicable vesting period.

Going Concern

Going Concern. The Company’s management is required to evaluate an entity’s ability to continue as a going concern for a period of one year following the date of the issuance of the Company’s consolidated financial statements. Disclosure is required if substantial doubt exists about an entity’s ability to continue as a going concern during the evaluation period, including management’s plans to alleviate the conditions and events that raise substantial doubt of going concern, if applicable.

At the date of the issuance of these consolidated financial statements, management considers the Company to be a going concern and has prepared these consolidated financial statements on a going concern basis.

Recent Accounting Pronouncements

Recent Accounting Pronouncements Issued But Not Yet Adopted. In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Topic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (“ASU 2018-15”). The amendments in this standard align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal use software (and hosting arrangements that include an internal-use software license). Under this new standard, a customer in a hosting arrangement that is a service contract is required to follow the guidance in Subtopic 350-40 to determine which implementation costs to capitalize as a prepaid asset related to the service contract and which costs to expense. The capitalized implementation costs are to be expensed over the term of the hosting arrangement and reflected in the same line in the consolidated statement of operations as the fees associated with the hosting element of the arrangement. Similarly, capitalized implementation costs are to be presented in the statement of cash flows in the same line as payments made for fees associated with the hosting element. The Company will adopt this new standard at the same time as our parent company, which will be no later than the fiscal year beginning after December 15, 2019, although early adoption is permitted. The Company is currently evaluating the impact of this new standard on its consolidated financial position and results of operations and has not yet determined when to adopt and whether to apply the new standard retrospectively or prospectively to implementation costs incurred after the date of adoption.

In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), which seeks to provide a single, comprehensive revenue recognition model for all contracts with customers concerning the recognition, measurement and disclosure of revenue from those contracts. Subsequent to the issuance of ASU 2014-09, the FASB amended the standard to provide clarification and interpretive guidance to assist entities with implementation efforts, including guidance pertaining to the presentation of revenues on a gross basis (revenues presented separately from associated expenses) versus a net basis. The core principle of the new amended standard is that a company will recognize revenue when it transfers promised goods and services to customers in an amount that reflects the consideration to which the company is entitled in exchange for those services. In order to comply with the new standard, companies will need to (i) identify performance obligations in each contract, (ii) estimate the amount of variable consideration to include in the transaction price and (iii) allocate the transaction price to each separate performance obligation.

ASU 2014-09, as amended, is effective for interim and annual periods beginning after December 15, 2017, except for emerging growth companies that elect to use the extended transition period for complying with any new or revised financial accounting standards pursuant to Section 7(a)(2)(b) of the Securities Act.

ASU 2014-09 allows for either full retrospective adoption, meaning the standard is applied to all periods presented in the financial statements, or modified retrospective adoption, meaning the standard is applied only to the most current period presented. As an emerging growth company, we previously elected to use the extended transition period to defer implementation of the new standard until the first quarter of 2019 using the modified retrospective method with a cumulative adjustment to retained earnings as necessary. AMR, our parent company, is also an emerging growth company, but will cease to be an emerging growth company on December 31, 2018, which will require them to adopt ASU 2014-09 on December 31, 2018, with modified retroactive implementation as of January 1, 2018. Accordingly, we will also adopt ASU 2014-09 at the same time as our parent company.

We are continuing our review of contracts for each of our revenue streams and evaluating the impact on our consolidated financial statements. We are continuing to evaluate the provisions of ASU 2014-09, as it relates to certain sales contracts, and in particular, as it relates to disclosure requirements. In addition, we are evaluating the impact, if any, on the presentation of our revenues and expenses under the new gross-versus-net presentation guidance and on our current accounting policies, including the need to make changes to relevant accounting policies and internal controls, if needed. Based on assessments performed to date, we do not expect ASU 2014-09 to have an effect on the timing of revenue recognition or our financial position. In addition, we currently expect the impact regarding gross-versus-net presentation to involve certain presentation changes specifically related to natural gas processing contracts; however, the impact of such presentation changes will not impact our consolidated operating income, net income or cash flows.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”), which supersedes ASC 840 “Leases” and creates a new topic, ASC 842 “Leases.” The amendments in this update require, among other things, that lessees recognize the following for all leases (except for short-term leases) at the commencement date: (i) a lease liability, which is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis; and (ii) a right-of-use asset, which is an asset that represents a lessee’s right to use, or control the use of, a specified asset for the lease term. Lessees and lessors must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. ASU 2016-02 also requires disclosures designed to provide information on the amount, timing, and uncertainty of cash flows arising from leases.  In January 2018, the FASB issued ASU No. 2018-01, Land easement practical expedient for transition to Topic 842 (“ASU 2018-01”), which provides an optional transition practical expedient to not evaluate under Topic 842 existing or expired land easements that were not previously accounted for as leases under Topic 840, Leases.  The standard, as amended, will be effective for interim and annual periods beginning after December 15, 2018. In the normal course of business, we enter into operating lease agreements to support our exploration and development operations and lease assets such as drilling rigs, well equipment, compressors, office space and other assets.

The standard provides several optional practical expedients in transition. We expect to elect the “package of practical expedients”, which permits us to forgo reassessment of our prior conclusions about lease identification, lease classification and initial direct costs for leases entered into prior to the effective date. We also expect to elect the land easement relief which permits us to forgo reassessment of existing or expired land easements not previously accounted for under ASC 840. Additionally, we expect to elect the practical expedient to not provide comparative reporting periods and therefore financial information will not be updated and the disclosures required under the new standard will not be provided for dates and periods before January 1, 2019. We do not expect to elect the use-of-hindsight practical expedient.

At this time, we are evaluating the financial impact ASU 2016-02 will have on our financial statements; however, the adoption and implementation of ASU 2016-02 is expected to have an impact on our consolidated balance sheets resulting in an increase in both the assets and liabilities relating to our operating lease activities greater than twelve months.  The adoption may also result in a change in the amount of lease expense recorded on our consolidated statements of operations, as well as add additional disclosures.  We expect our implementation work team will complete its evaluation of this new standard by the end of 2018.  

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”), which is intended to reduce diversity in practice in how certain transactions are classified in the statements of cash flows. ASU 2016-15 is effective for fiscal years and interim periods within those fiscal years beginning after December 15, 2017. As an emerging growth company, we had elected to use the extended transition period to defer adoption of this standard until 2019.  However, our parent company will lose its emerging growth status, effective December 31, 2018.  Accordingly, we will be required to adopt this new standard on December 31, 2018, when adopted by our parent company. The adoption of this guidance will not impact our financial position or results of operations but could result in presentational changes in our consolidated statements of cash flows. 

In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard requires the use of a new “expected credit loss” impairment model rather than the “incurred loss” model used today. With respect to our trade receivables and certain other financial instruments, we may be required to (i) maintain and use lifetime loss information rather than annual loss data and (ii) forecast future economic conditions and quantify the effect of those conditions on future expected losses. The standard, which will be effective for us in fiscal years beginning after December 15, 2019, also requires additional disclosures regarding the credit quality of our trade receivables and other financial instruments. No determination has yet been made of the impact of this new standard on our financial position or results of operations.

XML

Summary Of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2018

Accounting Policies [Abstract]

Reconciliation of cash, cash equivalents and restricted cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets and the consolidated statements of cash flows (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Cash and cash equivalents	$	8,869	$	3,660
Restricted cash	872		1,269
Cash of discontinued operations	—		61
Total cash, cash equivalents and restricted cash	$	9,741	$	4,990

XML

Supplemental Cash Flow Information (Tables)

9 Months Ended

Sep. 30, 2018

Supplemental Cash Flow Information [Abstract]

Supplemental cash flow disclosures and non-cash investing and financing activities

Supplemental cash flow disclosures and non-cash investing and financing activities are presented below (in thousands):

໿

	Successor			Predecessor
	February 9, 2018			January 1, 2018		Nine
	Through			Through		Months Ended
	September 30, 2018			February 8, 2018		September 30, 2017
Supplemental cash flow information:
Cash paid for interest	$	22,073		$	1,145	$	25,675
Cash paid for state income taxes	7			—		—
Non-cash investing and financing activities:
Increase in asset retirement obligations	4,652			—		3,778
Asset retirement obligations assumed, purchased properties	—			—		705
Increase in accruals or payables for capital expenditures	35,967			4,712		41,322
Distribution of non-STACK (assets) net liability	—			33,102		—
Increase in accounts receivable for sale of assets	(524		)	—		—

XML

Accounts Receivable (Tables)

9 Months Ended

Sep. 30, 2018

Receivables [Abstract]

Schedule of accounts receivable

Accounts receivable consisted of the following (in thousands):

໿

	Successor			Predecessor
	September 30, 2018			December 31, 2017
Oil, natural gas and natural gas liquids sales	$	40,134		$	26,916
Joint interest billings	44,548			13,821
Pooling interest (1)	23,367			35,839
Allowance for doubtful accounts	(65		)	(415		)
Total accounts receivable, net	$	107,984		$	76,161

_________________

(1) Pooling interest relates to Oklahoma’s forced pooling process which requires the Company to offer mineral interest owners the option to participate in the drilling of proposed wells.  The pooling interest listed above represents costs of unbilled interests on wells which the Company incurred before the pooling process was completed.  Depending upon the outcome of the pooling process, these costs may be billed to potential working interest owners or added to oil and gas properties.

XML

Business Combination (Tables)

9 Months Ended

Sep. 30, 2018

Business Acquisition [Line Items]

Purchase consideration

AMR’s preliminary estimated purchase price consideration for Alta Mesa was as follows (in thousands):

໿

	February 9, 2018 (As initially reported)		Measurement Period Adjustment (1)		February 9, 2018 (As adjusted)
Preliminary Purchase Consideration:(2)
SRII Opco Common Units issued (3)	$	1,251,782	$	9,467	$	1,261,249
Estimated fair value of contingent earn-out purchase consideration (4)	284,109		—		284,109
Total purchase price consideration	$	1,535,891	$	9,467	$	1,545,358

_________________

(1) The measurement period adjustment relates to the issuance of 1,197,934 of additional SRII Opco Common Units, valued at approximately $7.90 per unit, to the AM Contributor based on a final closing statement agreed to by the parties during the three months ended June 30, 2018 (Successor).

(2) The preliminary purchase price consideration is for 100% of the limited partner interests in us and 100% of the economic interests and 90% of the voting interests in AMH GP.  

(3) At closing, the Riverstone Contributor received consideration of 20,000,000 SRII Opco Common Units and the AM Contributor received consideration of 138,402,398 SRII Opco Common Units. The estimated fair value of an SRII Opco Common Unit was approximately $7.90 per unit and reflects discounts for holding requirements and liquidity.

(4) For a period of seven years following Closing, the AM Contributor will be entitled to receive an earn-out consideration to be paid in the form of SRII Opco Common Units (and a corresponding number of shares of AMR Class C Common Stock) if the 20-day VWAP of the Class A Common Stock of AMR equals or exceeds the specified prices pursuant to the AM Contribution Agreement. Pursuant to ASC 805 and ASC 480, Distinguishing Liabilities from Equity (“ASC 480”), we have determined that the fair value of the earn-out consideration was approximately $284.1 million, which was classified as equity. The fair value of the contingent equity earn-out consideration was determined using the Monte Carlo simulation valuation method based on Level 3 inputs as defined in the fair value hierarchy. The key inputs included the listed market price for Class A Common Stock, market volatility of a peer group of companies similar to AMR (due to the lack of trading activity in the Class A Common Stock), no dividend yield, an expected life of each earn-out threshold based on the remaining contractual term of the contingent liability earn-out period and a risk-free rate based on U.S. dollar overnight indexed swaps with a maturity equivalent to the earn-out’s expected life.

Allocation of purchase consideration

The allocation of AMR’s preliminary estimate of the purchase consideration to the assets acquired and liabilities assumed in the acquisition of Alta Mesa was as follows (in thousands):

໿

	February 9, 2018 (As initially reported)		Measurement Period Adjustment (1)			February 9, 2018 (As adjusted)
Estimated Fair Value of Assets Acquired(2)
Cash, cash equivalents and short term restricted cash	$	10,345	$	—		$	10,345
Accounts receivable	101,745		—			101,745
Other receivables	1,222		—			1,222
Receivables due from related party	907		—			907
Prepaid expenses and other current assets	1,405		—			1,405
Derivative financial instruments	352		—			352
Property and equipment:(3)
Oil and natural gas properties, successful efforts	2,314,858		(1,479		)	2,313,379
Other property and equipment, net	43,318		—			43,318
Notes receivable due from related party	12,454		—			12,454
Deposits and other long-term assets	10,286		—			10,286
Total fair value of assets acquired	2,496,892		(1,479		)	2,495,413
Estimated Fair Value of Liabilities Assumed (2)
Accounts payable and accrued liabilities	210,867		(10,946		)	199,921
Accounts payable — affiliate	5,476		—			5,476
Advances from non-operators	6,803		—			6,803
Advances from related party	47,506		—			47,506
Asset retirement obligations (3)	5,998		—			5,998
Derivative financial instruments	11,585		—			11,585
Long-term debt(4)	667,700		—			667,700
Other long-term liabilities	5,066		—			5,066
Total fair value of liabilities assumed	961,001		(10,946		)	950,055
Total consideration and fair value	$	1,535,891	$	9,467		$	1,545,358

_________________

(1) The measurement period adjustments are recognized in the reporting period in which the adjustments were determined and calculated as if the accounting had been completed at the acquisition date.

(2) The assets acquired and liabilities assumed relate to Alta Mesa’s STACK assets.

(3) The estimated fair values of oil and natural gas properties and asset retirement obligations were determined using valuation techniques that convert future cash flows to a single discounted amount and involve the use of certain inputs that are not observable in the market (Level 3 inputs). Significant inputs include, but are not limited to recoverable reserves, production rates, future operating and development costs, future commodity prices, appropriate risk-adjusted discount rates and other relevant data. These inputs required significant judgments and estimates by management at the time of the valuation. Actual results may vary from these estimates.

(4) Represents the approximate fair value as of the acquisition date of Alta Mesa’s $500.0 million aggregate principal amount of 7.875% senior unsecured notes due December 15, 2024, totaling approximately $533.6 million, based on Level 1 inputs, and outstanding borrowings under the Eighth A&R credit facility (described in Note 11 — Long-Term Debt, Net) of approximately $134.1 million as of the acquisition date.

SRII Opco, LP

Business Acquisition [Line Items]

Earn-out consideration

Additionally, for a period of seven years following the closing, the AM Contributor will be entitled to receive additional SRII Opco Common Units (and acquire a corresponding number of shares of AMR’s Class C Common Stock) as earn-out consideration if the 20-day volume-weighted average price (“20-Day VWAP”) of the Class A Common Stock of AMR equals or exceeds the following prices (each such payment, an “Earn-Out Payment”):

໿

20-Day VWAP	Earn-Out Consideration
$14.00	10,714,285 Common Units
$16.00	9,375,000 Common Units
$18.00	13,888,889 Common Units
$20.00	12,500,000 Common Units

XML

Property And Equipment (Tables)

9 Months Ended

Sep. 30, 2018

Property, Plant and Equipment [Abstract]

Summary of property and equipment

Property and equipment consisted of the following (in thousands):

	Successor			Predecessor
	September 30, 2018			December 31, 2017
OIL AND NATURAL GAS PROPERTIES
Unproved properties	$	865,695		$	84,590
Accumulated impairment of unproved properties	—			—
Unproved properties, net	865,695			84,590
Proved oil and natural gas properties	1,913,526			1,061,105
Accumulated depreciation, depletion, amortization and impairment	(81,464		)	(251,065		)
Proved oil and natural gas properties, net	1,832,062			810,040
TOTAL OIL AND NATURAL GAS PROPERTIES, net	2,697,757			894,630
OTHER PROPERTY AND EQUIPMENT
Land	5,059			2,912
Salt water disposal system	88,176			30,990
Office furniture and equipment and vehicles	2,325			20,008
Accumulated depreciation	(1,604		)	(21,770		)
OTHER PROPERTY AND EQUIPMENT, net	93,956			32,140
TOTAL PROPERTY AND EQUIPMENT, net	$	2,791,713		$	926,770

XML

Discontinued Operations (Predecessor) (Tables)

9 Months Ended

Sep. 30, 2018

Discontinued Operations and Disposal Groups [Abstract]

Schedule of discontinued operations

The assets and liabilities directly related to the non-STACK assets presented as discontinued operations in the condensed consolidated balance sheets were as follows (in thousands):

໿

	Predecessor
	December 31, 2017
Assets associated with discontinued operations:
Current assets
Cash	$	61
Accounts receivable	4,980
Other receivables	154
Total current assets	5,195
Noncurrent assets
Investments in LLC - Cost	9,000
Proved oil and natural gas properties, net	15,408
Unproved properties, net	15,504
Land	2,706
Other long-term assets	1,167
Total noncurrent assets	43,785
Total assets associated with discontinued operations	$	48,980
Liabilities associated with discontinued operations:
Current liabilities
Accounts payable and accrued liabilities	$	7,882
Asset retirement obligations	7,537
Total current liabilities	15,419
Noncurrent liabilities
Asset retirement obligations, net of current	37,049
Founder notes	28,166
Other long-term liabilities	1,647
Total noncurrent liabilities	66,862
Total liabilities associated with discontinued operations	$	82,281

The operating results directly related to the non-STACK assets and liabilities presented as discontinued operations within the condensed consolidated financial statements were as follows (in thousands):

໿

	Predecessor
	Three Months Ended September 30, 2017			January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Operating revenues and other:
Oil	$	10,994		$	1,617		$	36,122
Natural gas	2,376			1,023			7,964
Natural gas liquids	571			236			1,613
Other revenues	72			16			274
Total operating revenues	14,013			2,892			45,973
Loss on sale of assets	—			(1,923		)	—
Gain on acquisition of oil and gas properties	—			—			1,626
Total operating revenues and other	14,013			969			47,599
Operating expenses:
Lease operating expense	6,888			1,770			21,944
Marketing and transportation expense	352			83			1,080
Production taxes	1,443			167			5,100
Workover expense	273			127			1,981
Exploration expense	1,874			—			8,042
Depreciation, depletion and amortization	4,625			630			16,835
Impairment expense	82			5,560			28,018
Accretion expense	287			101			1,213
General and administrative expense	13			21			60
Total operating expenses	15,837			8,459			84,273
Other income (expense)
Interest expense	(305		)	(103		)	(904		)
Interest income and other	88			—			88
Total other income (expense)	(217		)	(103		)	(816		)
Loss from discontinued operations, net of state income taxes	$	(2,041	)	$	(7,593	)	$	(37,490	)

The total operating and investing cash flows of the non-STACK assets were as follows (in thousands):

໿

	Predecessor
	January 1, 2018 Through February 8, 2018			Nine Months Ended September 30, 2017
Total operating cash flows of discontinued operations	$	(6,838	)	$	16,166
Total investing cash flows of discontinued operations	(570		)	(15,950		)

XML

Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2018

Fair Value Disclosures [Abstract]

Measurement of fair value of assets and liabilities on a recurring basis

The following table presents information about our financial assets and liabilities measured at fair value on a recurring basis as of September 30, 2018 and December 31, 2017, and indicates the fair value hierarchy of the valuation techniques we utilized to determine such fair value:

	Level 1	Level 2		Level 3	Total
	(in thousands)
At September 30, 2018: (Successor)
Financial Assets:
Derivative contracts for oil and natural gas	—	$	5,670	—	$	5,670
Financial Liabilities:
Derivative contracts for oil and natural gas	—	$	47,144	—	$	47,144
At December 31, 2017: (Predecessor)
Financial Assets:
Derivative contracts for oil and natural gas	—	$	4,416	—	$	4,416
Financial Liabilities:
Derivative contracts for oil and natural gas	—	$	24,609	—	$	24,609

XML

Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Derivative [Line Items]

Fair values of derivative contracts

Fair Values of Derivative Contracts:

໿

	September 30, 2018 (Successor)
Balance sheet location	Gross fair value of assets		Gross liabilities offset against assets in the Balance Sheet			Net fair value of assets presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current assets	$	2,407	$	(2,407	)	$	—
Derivative financial instruments, long-term assets	3,263		(3,263		)	—
Total	$	5,670	$	(5,670	)	$	—

໿

Balance sheet location	Gross fair value of liabilities		Gross assets offset against liabilities in the Balance Sheet			Net fair value of liabilities presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current liabilities	$	36,803	$	(2,407	)	$	34,396
Derivative financial instruments, long-term liabilities	10,341		(3,263		)	7,078
Total	$	47,144	$	(5,670	)	$	41,474

໿

	December 31, 2017 (Predecessor)
Balance sheet location	Gross fair value of assets		Gross liabilities offset against assets in the Balance Sheet			Net fair value of assets presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current assets	$	1,406	$	(1,190	)	$	216
Derivative financial instruments, long-term assets	3,010		(3,002		)	8
Total	$	4,416	$	(4,192	)	$	224

໿

Balance sheet location	Gross fair value of liabilities		Gross assets offset against liabilities in the Balance Sheet			Net fair value of liabilities presented in the Balance Sheet
	(in thousands)
Derivative financial instruments, current liabilities	$	20,493	$	(1,190	)	$	19,303
Derivative financial instruments, long-term liabilities	4,116		(3,002		)	1,114
Total	$	24,609	$	(4,192	)	$	20,417

Effect of derivative instruments in the consolidated statements of operations

The following table summarizes the effect of our derivative instruments in the condensed consolidated statements of operations (in thousands):

໿

	Successor			Predecessor			Successor			Predecessor
Derivatives not	Three			Three			February 9, 2018			January 1, 2018		Nine
designated as hedging	Months Ended			Months Ended			Through			Through		Months Ended
instruments under ASC 815	September 30, 2018			September 30, 2017			September 30, 2018			February 8, 2018		September 30, 2017
Gain (loss) on derivative contracts
Oil commodity contracts	$	(12,339	)	$	(10,873	)	$	(63,630	)	$	5,431	$	31,665
Natural gas commodity contracts	1,127			1,035			553			1,867		6,763
Natural gas liquids commodity contracts	—			(630		)	—			—		(404		)
Total gain (loss) on derivative contracts	$	(11,212	)	$	(10,468	)	$	(63,077	)	$	7,298	$	38,024

Oil derivative contracts

Derivative [Line Items]

Open derivative contracts

We had the following open derivative contracts for crude oil at September 30, 2018:

OIL DERIVATIVE CONTRACTS

໿

໿

	Volume in bbls	Weighted Average		Range
Settlement Period and Type of Contract				High		Low
2018
Price Swap Contracts	552,000	$	53.55	$	61.26	$	50.27
Collar Contracts
Short Call Options	552,000	61.28		64.60		60.50
Long Put Options	552,000	51.67		60.00		50.00
Short Put Options	552,000	42.08		52.50		40.00
2019
Price Swap Contracts	182,500	63.03		63.03		63.03
Collar Contracts
Short Call Options	2,701,000	66.31		75.20		56.50
Long Put Options	2,883,500	53.80		62.00		50.00
Short Put Options	2,883,500	42.72		52.00		37.50
2020
Collar Contracts
Short Call Options	366,000	67.00		73.80		60.20
Long Put Options	1,317,600	56.46		62.50		50.00
Short Put Options	1,317,600	45.83		50.00		40.00

Natural gas derivative contracts

Derivative [Line Items]

Open derivative contracts

We had the following open derivative contracts for natural gas at September 30, 2018:

NATURAL GAS DERIVATIVE CONTRACTS

໿

	Volume in MMBtu	Weighted Average		Range
Settlement Period and Type of Contract				High		Low
2018
Price Swap Contracts	1,842,500	$	2.95	$	3.09	$	2.75
Collar Contracts
Short Call Options	1,832,500	3.36		3.75		3.14
Long Put Options	1,527,500	2.89		2.90		2.75
Short Put Options	610,000	2.40		2.40		2.40
2019
Price Swap Contracts	10,905,000	2.69		3.09		2.64
Collar Contracts
Short Call Options	4,000,000	3.31		3.75		3.17
Long Put Options	3,550,000	2.81		2.90		2.70
Short Put Options	2,425,000	2.27		2.40		2.20
2020
Collar Contracts
Short Call Options	2,275,000	3.19		3.20		3.17
Long Put Options	9,150,000	2.57		2.70		2.50
Short Put Options	9,150,000	2.07		2.20		2.00
2021
Collar Contracts
Long Put Options	2,250,000	2.65		2.65		2.65
Short Put Options	2,250,000	2.15		2.15		2.15

Natural gas basis swap derivative contracts

Derivative [Line Items]

Basis swap contracts

We had the following open financial basis swaps at September 30, 2018:

NATURAL GAS BASIS SWAP DERIVATIVE CONTRACTS

Volume in MMBtu(1)	Reference Price 1 (1)	Reference Price 2 (1)	Period			Weighted Average Spread ($ per MMBtu)
460,000	OneOK	NYMEX Henry Hub	Jul '19	—	Dec '19	$	(0.93	)
4,445,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Oct '18	—	Dec '18	(0.63		)
17,950,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Jan '19	—	Dec '19	(0.68		)
910,000	Tex/OKL Panhandle Eastern Pipeline	NYMEX Henry Hub	Jan '20	—	Mar '20	(0.49		)
152,500	San Juan	NYMEX Henry Hub	Nov '18	—	Dec '18	(0.47		)
2,365,000	San Juan	NYMEX Henry Hub	Jan '19	—	Oct '19	(0.78		)

_________________

(1) Represents short swaps that fix the basis differentials between OneOK, Tex/OKL Panhandle Eastern Pipeline (“PEPL”), San Juan and NYMEX Henry Hub.

Oil basis swap derivative contracts

Derivative [Line Items]

Basis swap contracts

OIL BASIS SWAP DERIVATIVE CONTRACTS

໿

Volume in bbl (1)	Reference Price 1 (1)	Reference Price 2 (1)	Period			Weighted Average Spread ($ per bbl)
552,000	CMA Oil	WTI	Oct '18	—	Dec '18	$	(0.54	)

_________________

(1) Represents basis swaps for the basis differentials between NYMEX CMA (Calendar Monthly Average) Roll that reconcile the trade month versus the delivery month for physical contract pricing and West Texas Intermediate (“WTI”).

XML

Asset Retirement Obligations (Tables)

9 Months Ended

Sep. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

Summary of changes in asset retirement obligations

A summary of the changes in asset retirement obligations is included in the table below (in thousands):

໿

	2018
Balance, as of January 1 (Predecessor)	$	10,469
Liabilities settled	(63		)
Revisions to estimates	63
Accretion expense	39
Balance, as of February 8 (Predecessor)	$	10,508
Balance, as of February 9 (Successor)	$	—
Liabilities assumed from Business Combination	5,998
Liabilities incurred	1,689
Liabilities settled	(1,249		)
Liabilities transferred in sale of properties	(20		)
Revisions to estimates (1)	3,562
Accretion expense	489
Balance, as of September 30 (Successor)	10,469
Less: Current portion	1,300
Long-term portion	$	9,169

⁽¹⁾The total revisions included $3.0 million related to additions to property, plant and equipment for the Successor Period.

XML

Long Term Debt, Net (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Long-term debt, net

Long-term debt, net consisted of the following (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Senior secured revolving credit facility	$	80,000	$	117,065
7.875% senior unsecured notes due 2024	500,000		500,000
Unamortized premium on senior unsecured notes	30,354		—
Unamortized deferred financing costs	—		(9,625		)
Total long-term debt, net	$	610,354	$	607,440

XML

Accounts Payable And Accrued Liabilities (Tables)

9 Months Ended

Sep. 30, 2018

Payables and Accruals [Abstract]

Details of accounts payable and accrued liabilities

The following provides the details of accounts payable and accrued liabilities (in thousands):

໿

	Successor		Predecessor
	September 30, 2018		December 31, 2017
Accruals for capital expenditures	$	83,687	$	48,771
Revenues and royalties payable	44,626		29,514
Accruals for operating expenses/taxes	8,156		14,632
Accrued interest	11,651		2,587
Derivative settlement payable	4,593		2,106
Other	3,408		4,301
Total accrued liabilities	156,121		101,911
Accounts payable	71,018		68,578
Accounts payable and accrued liabilities	$	227,139	$	170,489

XML

Equity Based Compensation (Successor) (Tables)

9 Months Ended

Sep. 30, 2018

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of stock option plans

Information about outstanding stock options is summarized in the table below:

໿

	Successor
	Stock Options		Weighted Average Grant - Date Fair Value		Weighted Average Remaining Term (in years)	Aggregate Intrinsic Value (in thousands)
Outstanding as of February 9, 2018	—		$	—	—
Granted	4,704,433		4.45		—
Exercised	—		—		—
Forfeited or expired	(94,693	)	4.52		—
Outstanding as of September 30, 2018	4,609,740		$	4.44	6.4	$	—
Exercisable as of September 30, 2018	—		$	—	—	$	—

Summary of stock options granted and valuation assumptions

The following summarizes the assumptions used to determine the fair value of those options:

໿

	Successor
	February 9, 2018 Through September 30, 2018
Expected term (in years)	4.5
Expected stock volatility	64.6	%
Dividend yield	—
Risk-free interest rate	2.4	%

Schedule of restricted stock

The following table provides information about restricted stock awards granted during the Successor Period:

໿

	Successor
	Restricted Stock Awards		Weighted Average Grant Date Fair Value per share
Outstanding as of February 9, 2018	—		$	—
Granted	1,658,756		7.77
Vested	—		—
Forfeited or expired	(42,086	)	8.74
Outstanding as of September 30, 2018	1,616,670		$	7.75

Schedule of restricted stock units

The following summary provides information about the target number of PSUs granted during the Successor Period:

	Successor
	PSUs			Weighted Average Grant - Date Fair Value per unit
Outstanding as of February 9, 2018	—			$	—
Granted	781,200			8.69
Vested	—			—
Forfeited or expired	(4,174	)		8.45
Outstanding as of September 30, 2018	777,026		—	$	8.69

XML

Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Feb. 09, 2018
Summary Of Significant Accounting Policies [Line Items]
Fair value of senior notes payable	$ 476.3
7.875% Senior Unsecured Notes Due 2024
Summary Of Significant Accounting Policies [Line Items]
Face value of senior notes issued	$ 500.0
Fair value of senior notes payable		$ 533.6

XML

Summary Of Significant Accounting Policies (Reconciliation Of Cash, Cash Equivalents And Restricted Cash) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Feb. 08, 2018	Dec. 31, 2017	Sep. 30, 2017	Dec. 31, 2016
Successor
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents	$ 8,869
Restricted cash	872
Total cash, cash equivalents and restricted cash	$ 9,741	$ 10,345
Predecessor
Summary Of Significant Accounting Policies [Line Items]
Cash and cash equivalents			$ 3,660
Restricted cash			1,269
Cash of discontinued operations			61
Total cash, cash equivalents and restricted cash		$ 10,345	$ 4,990	$ 4,913	$ 7,618

XML

Supplemental Cash Flow Information (Supplemental Disclosures To The Consolidated Statements Of Cash Flows) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Successor
Supplemental Cash Flow Information [Line Items]
Cash paid for interest				$ 22,073
Cash paid for state income taxes				7
Non-cash investing and financing activities:
Increase in asset retirement obligations				4,652
Asset retirement obligations assumed, purchased properties				0
Increase in accruals or payables for capital expenditures				35,967
Distribution of non-STACK (assets) net liability		$ 0		0
Increase in accounts receivable for sale of assets				$ (524)
Predecessor
Supplemental Cash Flow Information [Line Items]
Cash paid for interest	$ 1,145				$ 25,675
Non-cash investing and financing activities:
Increase in asset retirement obligations					3,778
Asset retirement obligations assumed, purchased properties					705
Increase in accruals or payables for capital expenditures	4,712				41,322
Distribution of non-STACK (assets) net liability	$ 33,102		$ 0		$ 0

XML

Accounts Receivable (Schedule Of Accounts Receivable ) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Successor
Oil, natural gas and natural gas liquids sales	$ 40,134
Joint interest billings	44,548
Pooling interest	23,367
Allowance for doubtful accounts	(65)
Total accounts receivable, net	$ 107,984
Predecessor
Oil, natural gas and natural gas liquids sales		$ 26,916
Joint interest billings		13,821
Pooling interest		35,839
Allowance for doubtful accounts		(415)
Total accounts receivable, net		$ 76,161

XML

Business Combination (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions			3 Months Ended	9 Months Ended
	Feb. 09, 2018	Aug. 16, 2017	Sep. 30, 2018	Sep. 30, 2018
SRII Opco, LP
Business Acquisition [Line Items]
Redeemable period				7 years
SRII Opco, LP | Alta Mesa Holdings GP, LLC
Business Acquisition [Line Items]
Economic interests	100.00%
Voting interests	90.00%	90.00%
SRII Opco, LP | Kingfisher Midstream, LLC
Business Acquisition [Line Items]
Economic interests	100.00%
Alta Mesa Resources
Business Acquisition [Line Items]
Economic interests	100.00%
Redeemable period		7 years
Earn-out consideration, day for volume-weighted average price		20 days
Contributions from AMR	$ 560
AM Contributor
Business Acquisition [Line Items]
Common units (in shares)	138,402,398		1,197,934
AM Contributor | SRII Opco, LP
Business Acquisition [Line Items]
Common units (in shares)		138,402,398
Common Class C | AM Contributor | Alta Mesa Resources
Business Acquisition [Line Items]
Common stock par value (in dollars per share)	$ 0.0001

XML

Business Combination (Earn-Out Consideration) (Details) - SRII Opco, LP	Aug. 16, 2017 $ / shares shares
$14.00 VWAP
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
20-Day VWAP (in dollars per share) | $ / shares	$ 14.00
Earn-Out Consideration (in shares) | shares	10,714,285
$16.00 VWAP
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
20-Day VWAP (in dollars per share) | $ / shares	$ 16.00
Earn-Out Consideration (in shares) | shares	9,375,000
$18.00 VWAP
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
20-Day VWAP (in dollars per share) | $ / shares	$ 18.00
Earn-Out Consideration (in shares) | shares	13,888,889
$20.00 VWAP
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
20-Day VWAP (in dollars per share) | $ / shares	$ 20.00
Earn-Out Consideration (in shares) | shares	12,500,000

XML

Business Combination (Purchase Consideration) (Details) - USD ($) $ / shares in Units, $ in Thousands			3 Months Ended	9 Months Ended
	Feb. 09, 2018	Aug. 16, 2017	Sep. 30, 2018	Sep. 30, 2018
Alta Mesa Resources
Business Acquisition [Line Items]
Economic interests	100.00%
Redeemable period		7 years
SRII Opco, LP
Business Acquisition [Line Items]
SRII Opco Common Units issued	$ 1,261,249
Estimated fair value of contingent earn-out purchase consideration	284,109
Total purchase price consideration	$ 1,545,358
Redeemable period				7 years
Alta Mesa Holdings GP, LLC | SRII Opco, LP
Business Acquisition [Line Items]
Economic interests	100.00%
Voting interests	90.00%	90.00%
AM Contributor
Business Acquisition [Line Items]
Common units (in shares)	138,402,398		1,197,934
AM Contributor | SRII Opco, LP
Business Acquisition [Line Items]
Common units (in shares)		138,402,398
Riverstone Contributor Agreement
Business Acquisition [Line Items]
Common units (in shares)	20,000,000
Successor
Business Acquisition [Line Items]
Estimated fair value of contingent earn-out purchase consideration	$ 284,100
Successor | SRII Opco, LP
Business Acquisition [Line Items]
Common stock, price of saleable stocks (in dollars per share)	$ 7.90
As initially reported | SRII Opco, LP
Business Acquisition [Line Items]
SRII Opco Common Units issued	$ 1,251,782
Estimated fair value of contingent earn-out purchase consideration	284,109
Total purchase price consideration	1,535,891
Measurement Period Adjustment | SRII Opco, LP
Business Acquisition [Line Items]
SRII Opco Common Units issued	9,467
Total purchase price consideration	$ 9,467

XML

Business Combination (Allocation Of Purchase Consideration) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Feb. 09, 2018
Business Acquisition [Line Items]
Cash, cash equivalents and short term restricted cash		$ 10,345
Accounts receivable		101,745
Other receivables		1,222
Receivables due from related party		907
Prepaid expenses and other current assets		1,405
Derivative financial instruments		352
Oil and natural gas properties, successful efforts		2,313,379
Other property and equipment, net		43,318
Notes receivable due from related party		12,454
Deposits and other long-term assets		10,286
Total fair value of assets acquired		2,495,413
Accounts payable and accrued liabilities		199,921
Accounts payable — affiliate		5,476
Advances from non-operators		6,803
Advances from related party		47,506
Asset retirement obligation		5,998
Derivative financial instruments		11,585
Long-term debt		667,700
Other long-term liabilities		5,066
Total fair value of liabilities assumed		950,055
Total consideration and fair value		1,545,358
Fair value of senior notes payable	$ 476,300
Senior secured revolving credit facility		134,100
7.875% Senior Unsecured Notes Due 2024
Business Acquisition [Line Items]
7.875% senior unsecured notes due 2024	$ 500,000
Stated interest rate of senior notes	7.875%
Fair value of senior notes payable		533,600
Successor
Business Acquisition [Line Items]
Asset retirement obligation		5,998
Successor | 7.875% Senior Unsecured Notes Due 2024
Business Acquisition [Line Items]
7.875% senior unsecured notes due 2024	$ 500,000
Successor | 7.875% Senior Unsecured Notes Due 2024 | Level 1
Business Acquisition [Line Items]
Fair value of senior notes payable		533,600
As initially reported
Business Acquisition [Line Items]
Cash, cash equivalents and short term restricted cash		10,345
Accounts receivable		101,745
Other receivables		1,222
Receivables due from related party		907
Prepaid expenses and other current assets		1,405
Derivative financial instruments		352
Oil and natural gas properties, successful efforts		2,314,858
Other property and equipment, net		43,318
Notes receivable due from related party		12,454
Deposits and other long-term assets		10,286
Total fair value of assets acquired		2,496,892
Accounts payable and accrued liabilities		210,867
Accounts payable — affiliate		5,476
Advances from non-operators		6,803
Advances from related party		47,506
Asset retirement obligation		5,998
Derivative financial instruments		11,585
Long-term debt		667,700
Other long-term liabilities		5,066
Total fair value of liabilities assumed		961,001
Total consideration and fair value		1,535,891
Measurement Period Adjustment
Business Acquisition [Line Items]
Cash, cash equivalents and short term restricted cash		0
Accounts receivable		0
Other receivables		0
Receivables due from related party		0
Prepaid expenses and other current assets		0
Derivative financial instruments		0
Oil and natural gas properties, successful efforts		(1,479)
Other property and equipment, net		0
Notes receivable due from related party		0
Deposits and other long-term assets		0
Total fair value of assets acquired		(1,479)
Accounts payable and accrued liabilities		(10,946)
Accounts payable — affiliate		0
Advances from non-operators		0
Advances from related party		0
Asset retirement obligation		0
Derivative financial instruments		0
Long-term debt		0
Other long-term liabilities		0
Total fair value of liabilities assumed		(10,946)
Total consideration and fair value		$ 9,467

XML

Property And Equipment (Summary Of Property And Equipment) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Successor
Property, Plant and Equipment [Line Items]
Unproved properties	$ 865,695
Accumulated impairment of unproved properties	0
Unproved properties, net	865,695
Proved oil and natural gas properties	1,913,526
Accumulated depreciation, depletion, amortization and impairment	(81,464)
Proved oil and natural gas properties, net	1,832,062
TOTAL OIL AND NATURAL GAS PROPERTIES, net	2,697,757
Land	5,059
Salt water disposal system	88,176
Office furniture and equipment and vehicles	2,325
Accumulated depreciation	(1,604)
OTHER PROPERTY AND EQUIPMENT, net	93,956
Total property and equipment, net	$ 2,791,713
Predecessor
Property, Plant and Equipment [Line Items]
Unproved properties		$ 84,590
Accumulated impairment of unproved properties		0
Unproved properties, net		84,590
Proved oil and natural gas properties		1,061,105
Accumulated depreciation, depletion, amortization and impairment		(251,065)
Proved oil and natural gas properties, net		810,040
TOTAL OIL AND NATURAL GAS PROPERTIES, net		894,630
Land		2,912
Salt water disposal system		30,990
Office furniture and equipment and vehicles		20,008
Accumulated depreciation		(21,770)
OTHER PROPERTY AND EQUIPMENT, net		32,140
Total property and equipment, net		$ 926,770

XML

Discontinued Operations (Predecessor) (Narrative) (Details) - Predecessor - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Interest on notes payable to founder	$ 103		$ 904
Notes payable to founder
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Effective rate of interest				10.00%
Notes payable to founder				$ 28,300
Interest on notes payable to founder	$ 100	$ 300	$ 900

XML

Discontinued Operations (Predecessor) (Schedule Of Assets And Liabilities Reclassified In Discontinued Operation) (Details) - Predecessor $ in Thousands	Dec. 31, 2017 USD ($)
Current assets associated with discontinued operations:
Total current assets	$ 5,195
Noncurrent assets associated with discontinued operations:
Total noncurrent assets	43,785
Current liabilities associated with discontinued operations
Total current liabilities	15,419
Noncurrent liabilities associated with discontinued operations
Total noncurrent liabilities	66,862
Weeks Island Field, Louisiana | Non-STACK Assets | Discontinued Operations, Disposed of by Sale
Current assets associated with discontinued operations:
Cash	61
Accounts receivable	4,980
Other receivables	154
Total current assets	5,195
Noncurrent assets associated with discontinued operations:
Investments in LLC - Cost	9,000
Proved oil and natural gas properties, net	15,408
Unproved properties, net	15,504
Land	2,706
Other long-term assets	1,167
Total noncurrent assets	43,785
Total assets associated with discontinued operations	48,980
Current liabilities associated with discontinued operations
Accounts payable and accrued liabilities	7,882
Asset retirement obligations	7,537
Total current liabilities	15,419
Noncurrent liabilities associated with discontinued operations
Asset retirement obligations, net of current	37,049
Founder notes	28,166
Other long-term liabilities	1,647
Total noncurrent liabilities	66,862
Total liabilities associated with discontinued operations	$ 82,281

XML

Discontinued Operations (Predecessor) (Schedule Of Operations And Other Items Reclassified In Discontinued Operations) (Details) - Non-STACK Assets - Predecessor - Weeks Island Field, Louisiana - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2017	Sep. 30, 2017
Operating revenue and other loss from discontinued operations
Oil	$ 1,617	$ 10,994	$ 36,122
Natural gas	1,023	2,376	7,964
Natural gas liquids	236	571	1,613
Other revenues	16	72	274
Total operating revenues	2,892	14,013	45,973
Loss on sale of assets	(1,923)	0	0
Gain on acquisition of oil and gas properties	0	0	1,626
Total operating revenues and other	969	14,013	47,599
Operating expenses from discontinued operations:
Lease operating expense	1,770	6,888	21,944
Marketing and transportation expense	83	352	1,080
Production taxes	167	1,443	5,100
Workover expense	127	273	1,981
Exploration expense	0	1,874	8,042
Depreciation, depletion and amortization	630	4,625	16,835
Impairment expense	5,560	82	28,018
Accretion expense	101	287	1,213
General and administrative expense	21	13	60
Total operating expenses	8,459	15,837	84,273
Interest expense	(103)	(305)	(904)
Interest income and other	0	88	88
Total other income (expense)	(103)	(217)	(816)
Loss from discontinued operations, net of state income taxes	$ (7,593)	$ (2,041)	$ (37,490)

XML

Discontinued Operations (Predecessor) (Total Operating And Investing Cash Flows Of Discontinued Operations) (Details) - Non-STACK Assets - Predecessor - Weeks Island Field, Louisiana - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total operating cash flows of discontinued operations	$ (6,838)	$ 16,166
Total investing cash flows of discontinued operations	$ (570)	$ (15,950)

XML

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Feb. 09, 2018	Dec. 31, 2017
Fair Value Disclosures [Line Items]
Fair value of senior notes payable		$ 476,300		$ 476,300
Predecessor
Fair Value Disclosures [Line Items]
Carrying value of oil and gas properties					$ 3,300
Written down fair value of oil and gas properties					2,100
Impairment charges to oil and gas properties	$ 0		$ 0		1,188
Asset retirement obligation measured at fair value	$ 0				$ 1,000
Successor
Fair Value Disclosures [Line Items]
Impairment charges to oil and gas properties		0		0
Asset retirement obligation measured at fair value				1,700
7.875% Senior Unsecured Notes Due 2024
Fair Value Disclosures [Line Items]
7.875% senior unsecured notes due 2024		500,000		500,000
Fair value of senior notes payable						$ 533,600
7.875% Senior Unsecured Notes Due 2024 | Predecessor
Fair Value Disclosures [Line Items]
7.875% senior unsecured notes due 2024							$ 500,000
7.875% Senior Unsecured Notes Due 2024 | Successor
Fair Value Disclosures [Line Items]
7.875% senior unsecured notes due 2024		$ 500,000		$ 500,000

XML

Fair Value Measurements (Measurement Of Fair Value Of Assets And Liabilities On Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Successor
Financial Assets:
Derivative contracts for oil and natural gas	$ 5,670
Financial Liabilities:
Derivative contracts for oil and natural gas	47,144
Successor | Level 1
Financial Assets:
Derivative contracts for oil and natural gas	0
Financial Liabilities:
Derivative contracts for oil and natural gas	0
Successor | Level 2
Financial Assets:
Derivative contracts for oil and natural gas	5,670
Financial Liabilities:
Derivative contracts for oil and natural gas	47,144
Successor | Level 3
Financial Assets:
Derivative contracts for oil and natural gas	0
Financial Liabilities:
Derivative contracts for oil and natural gas	$ 0
Predecessor
Financial Assets:
Derivative contracts for oil and natural gas		$ 4,416
Financial Liabilities:
Derivative contracts for oil and natural gas		24,609
Predecessor | Level 1
Financial Assets:
Derivative contracts for oil and natural gas		0
Financial Liabilities:
Derivative contracts for oil and natural gas		0
Predecessor | Level 2
Financial Assets:
Derivative contracts for oil and natural gas		4,416
Financial Liabilities:
Derivative contracts for oil and natural gas		24,609
Predecessor | Level 3
Financial Assets:
Derivative contracts for oil and natural gas		0
Financial Liabilities:
Derivative contracts for oil and natural gas		$ 0

XML

Derivative Financial Instruments (Fair Values Of Derivative Contracts) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Successor
Derivatives, Fair Value [Line Items]
Gross fair value of assets	$ 5,670
Gross liabilities offset against assets in the Balance Sheet	(5,670)
Net fair value of assets presented in the Balance Sheet	0
Gross fair value of liabilities	47,144
Gross assets offset against liabilities in the Balance Sheet	(5,670)
Net fair value of liabilities presented in the Balance Sheet	41,474
Successor | Derivative financial instruments, current assets
Derivatives, Fair Value [Line Items]
Gross fair value of assets	2,407
Gross liabilities offset against assets in the Balance Sheet	(2,407)
Net fair value of assets presented in the Balance Sheet	0
Successor | Derivative financial instruments, long-term assets
Derivatives, Fair Value [Line Items]
Gross fair value of assets	3,263
Gross liabilities offset against assets in the Balance Sheet	(3,263)
Net fair value of assets presented in the Balance Sheet	0
Successor | Derivative financial instruments, current liabilities
Derivatives, Fair Value [Line Items]
Gross fair value of liabilities	36,803
Gross assets offset against liabilities in the Balance Sheet	(2,407)
Net fair value of liabilities presented in the Balance Sheet	34,396
Successor | Derivative financial instruments, long-term liabilities
Derivatives, Fair Value [Line Items]
Gross fair value of liabilities	10,341
Gross assets offset against liabilities in the Balance Sheet	(3,263)
Net fair value of liabilities presented in the Balance Sheet	$ 7,078
Predecessor
Derivatives, Fair Value [Line Items]
Gross fair value of assets		$ 4,416
Gross liabilities offset against assets in the Balance Sheet		(4,192)
Net fair value of assets presented in the Balance Sheet		224
Gross fair value of liabilities		24,609
Gross assets offset against liabilities in the Balance Sheet		(4,192)
Net fair value of liabilities presented in the Balance Sheet		20,417
Predecessor | Derivative financial instruments, current assets
Derivatives, Fair Value [Line Items]
Gross fair value of assets		1,406
Gross liabilities offset against assets in the Balance Sheet		(1,190)
Net fair value of assets presented in the Balance Sheet		216
Predecessor | Derivative financial instruments, long-term assets
Derivatives, Fair Value [Line Items]
Gross fair value of assets		3,010
Gross liabilities offset against assets in the Balance Sheet		(3,002)
Net fair value of assets presented in the Balance Sheet		8
Predecessor | Derivative financial instruments, current liabilities
Derivatives, Fair Value [Line Items]
Gross fair value of liabilities		20,493
Gross assets offset against liabilities in the Balance Sheet		(1,190)
Net fair value of liabilities presented in the Balance Sheet		19,303
Predecessor | Derivative financial instruments, long-term liabilities
Derivatives, Fair Value [Line Items]
Gross fair value of liabilities		4,116
Gross assets offset against liabilities in the Balance Sheet		(3,002)
Net fair value of liabilities presented in the Balance Sheet		$ 1,114

XML

Derivative Financial Instruments (Effect Of Derivative Instruments In The Consolidated Statements Of Operations) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Successor
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts		$ (11,212)		$ (63,077)
Successor | Derivatives not designated as hedging instruments under ASC 815 | Oil commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts		(12,339)		(63,630)
Successor | Derivatives not designated as hedging instruments under ASC 815 | Natural gas commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts		1,127		553
Successor | Derivatives not designated as hedging instruments under ASC 815 | Natural gas liquids commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts		$ 0		$ 0
Predecessor
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts	$ 7,298		$ (10,468)		$ 38,024
Predecessor | Derivatives not designated as hedging instruments under ASC 815 | Oil commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts	5,431		(10,873)		31,665
Predecessor | Derivatives not designated as hedging instruments under ASC 815 | Natural gas commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts	1,867		1,035		6,763
Predecessor | Derivatives not designated as hedging instruments under ASC 815 | Natural gas liquids commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Total gain (loss) on derivative contracts	$ 0		$ (630)		$ (404)

XML

Derivative Financial Instruments (Oil Derivative Contracts) (Details) - Oil derivative contracts	9 Months Ended
	Sep. 30, 2018 $ / bbl bbl
Price Swap Contracts | 2018
Derivative [Line Items]
Volume in bbls | bbl	552,000
Weighted average swap price	53.55
Price Swap Contracts | 2018 | High
Derivative [Line Items]
Swap price	61.26
Price Swap Contracts | 2018 | Low
Derivative [Line Items]
Swap price	50.27
Price Swap Contracts | 2019
Derivative [Line Items]
Volume in bbls | bbl	182,500
Weighted average swap price	63.03
Price Swap Contracts | 2019 | High
Derivative [Line Items]
Swap price	63.03
Price Swap Contracts | 2019 | Low
Derivative [Line Items]
Swap price	63.03
Short Call Options | 2018
Derivative [Line Items]
Volume in bbls | bbl	552,000
Weighted average option price	61.28
Short Call Options | 2018 | High
Derivative [Line Items]
Option price	64.60
Short Call Options | 2018 | Low
Derivative [Line Items]
Option price	60.50
Short Call Options | 2019
Derivative [Line Items]
Volume in bbls | bbl	2,701,000
Weighted average option price	66.31
Short Call Options | 2019 | High
Derivative [Line Items]
Option price	75.20
Short Call Options | 2019 | Low
Derivative [Line Items]
Option price	56.50
Short Call Options | 2020
Derivative [Line Items]
Volume in bbls | bbl	366,000
Weighted average option price	67.00
Short Call Options | 2020 | High
Derivative [Line Items]
Option price	73.80
Short Call Options | 2020 | Low
Derivative [Line Items]
Option price	60.20
Long Put Options | 2018
Derivative [Line Items]
Volume in bbls | bbl	552,000
Weighted average option price	51.67
Long Put Options | 2018 | High
Derivative [Line Items]
Option price	60.00
Long Put Options | 2018 | Low
Derivative [Line Items]
Option price	50.00
Long Put Options | 2019
Derivative [Line Items]
Volume in bbls | bbl	2,883,500
Weighted average option price	53.80
Long Put Options | 2019 | High
Derivative [Line Items]
Option price	62.00
Long Put Options | 2019 | Low
Derivative [Line Items]
Option price	50.00
Long Put Options | 2020
Derivative [Line Items]
Volume in bbls | bbl	1,317,600
Weighted average option price	56.46
Long Put Options | 2020 | High
Derivative [Line Items]
Option price	62.50
Long Put Options | 2020 | Low
Derivative [Line Items]
Option price	50.00
Short Put Options | 2018
Derivative [Line Items]
Volume in bbls | bbl	552,000
Weighted average option price	42.08
Short Put Options | 2018 | High
Derivative [Line Items]
Option price	52.50
Short Put Options | 2018 | Low
Derivative [Line Items]
Option price	40.00
Short Put Options | 2019
Derivative [Line Items]
Volume in bbls | bbl	2,883,500
Weighted average option price	42.72
Short Put Options | 2019 | High
Derivative [Line Items]
Option price	52.00
Short Put Options | 2019 | Low
Derivative [Line Items]
Option price	37.50
Short Put Options | 2020
Derivative [Line Items]
Volume in bbls | bbl	1,317,600
Weighted average option price	45.83
Short Put Options | 2020 | High
Derivative [Line Items]
Option price	50.00
Short Put Options | 2020 | Low
Derivative [Line Items]
Option price	40.00

XML

Derivative Financial Instruments (Natural Gas Derivative Contracts) (Details) - Natural gas	9 Months Ended
	Sep. 30, 2018 MMBTU $ / MMBTU
2018 | Price Swap Contracts
Derivative [Line Items]
Volume in MMBtu | MMBTU	1,842,500
Weighted average swap price	2.95
2018 | Price Swap Contracts | High
Derivative [Line Items]
Swap price	3.09
2018 | Price Swap Contracts | Low
Derivative [Line Items]
Swap price	2.75
2018 | Short Call Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	1,832,500
Weighted average option price	3.36
2018 | Short Call Options | High
Derivative [Line Items]
Option price	3.75
2018 | Short Call Options | Low
Derivative [Line Items]
Option price	3.14
2018 | Long Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	1,527,500
Weighted average option price	2.89
2018 | Long Put Options | High
Derivative [Line Items]
Option price	2.90
2018 | Long Put Options | Low
Derivative [Line Items]
Option price	2.75
2018 | Short Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	610,000
Weighted average option price	2.40
2018 | Short Put Options | High
Derivative [Line Items]
Option price	2.40
2018 | Short Put Options | Low
Derivative [Line Items]
Option price	2.40
2019 | Price Swap Contracts
Derivative [Line Items]
Volume in MMBtu | MMBTU	10,905,000
Weighted average swap price	2.69
2019 | Price Swap Contracts | High
Derivative [Line Items]
Swap price	3.09
2019 | Price Swap Contracts | Low
Derivative [Line Items]
Swap price	2.64
2019 | Short Call Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	4,000,000
Weighted average option price	3.31
2019 | Short Call Options | High
Derivative [Line Items]
Option price	3.75
2019 | Short Call Options | Low
Derivative [Line Items]
Option price	3.17
2019 | Long Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	3,550,000
Weighted average option price	2.81
2019 | Long Put Options | High
Derivative [Line Items]
Option price	2.90
2019 | Long Put Options | Low
Derivative [Line Items]
Option price	2.70
2019 | Short Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	2,425,000
Weighted average option price	2.27
2019 | Short Put Options | High
Derivative [Line Items]
Option price	2.40
2019 | Short Put Options | Low
Derivative [Line Items]
Option price	2.20
2020 | Short Call Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	2,275,000
Weighted average option price	3.19
2020 | Short Call Options | High
Derivative [Line Items]
Option price	3.20
2020 | Short Call Options | Low
Derivative [Line Items]
Option price	3.17
2020 | Long Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	9,150,000
Weighted average option price	2.57
2020 | Long Put Options | High
Derivative [Line Items]
Option price	2.70
2020 | Long Put Options | Low
Derivative [Line Items]
Option price	2.50
2020 | Short Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	9,150,000
Weighted average option price	2.07
2020 | Short Put Options | High
Derivative [Line Items]
Option price	2.20
2020 | Short Put Options | Low
Derivative [Line Items]
Option price	2.00
2021 | Long Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	2,250,000
Weighted average option price	2.65
2021 | Long Put Options | High
Derivative [Line Items]
Option price	2.65
2021 | Long Put Options | Low
Derivative [Line Items]
Option price	2.65
2021 | Short Put Options
Derivative [Line Items]
Volume in MMBtu | MMBTU	2,250,000
Weighted average option price	2.15
2021 | Short Put Options | High
Derivative [Line Items]
Option price	2.15
2021 | Short Put Options | Low
Derivative [Line Items]
Option price	2.15

XML

Derivative Financial Instruments (Natural Gas Basis Swap Derivative Contracts) (Details) - Natural gas basis swap derivative contracts	9 Months Ended
	Sep. 30, 2018 MMBTU $ / MMBTU
Jul 2019 to Dec 2019
Derivative [Line Items]
Volume in MMBtu | MMBTU	460,000
Weighted average spread ($/MMBtu) | $ / MMBTU	(0.93)
Oct 2018 to Dec 2018
Derivative [Line Items]
Volume in MMBtu | MMBTU	4,445,000
Weighted average spread ($/MMBtu) | $ / MMBTU	(0.63)
Jan 2019 to Dec 2019
Derivative [Line Items]
Volume in MMBtu | MMBTU	17,950,000
Weighted average spread ($/MMBtu) | $ / MMBTU	(0.68)
Jan 2020 to Mar 2020
Derivative [Line Items]
Volume in MMBtu | MMBTU	910,000
Weighted average spread ($/MMBtu) | $ / MMBTU	(0.49)
Nov 2018 to Dec 2018
Derivative [Line Items]
Volume in MMBtu | MMBTU	152,500
Weighted average spread ($/MMBtu) | $ / MMBTU	(0.47)
Jan 2019 to Oct 2019
Derivative [Line Items]
Volume in MMBtu | MMBTU	2,365,000
Weighted average spread ($/MMBtu) | $ / MMBTU	(0.78)

XML

Derivative Financial Instruments (Oil Basis Swap Derivative Contracts) (Details) - Oil basis swap derivative contracts - Oct 2018 to Dec 2018	9 Months Ended
	Sep. 30, 2018 $ / bbl bbl
Derivative [Line Items]
Volume in bbls | bbl	552,000
Weighted average spread ($/MMBtu) | $ / bbl	(0.54)

XML

Asset Retirement Obligations (Summary Of Changes In Asset Retirement Obligations) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Feb. 08, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Feb. 09, 2018	Dec. 31, 2017
Asset Retirement Obligation [Line Items]
Liabilities assumed from Business Combination						$ 5,998
Predecessor
Asset Retirement Obligation [Line Items]
Balance, beginning of period	$ 10,469
Liabilities settled	(63)
Revisions to estimates	63
Accretion expense	39		$ 108		$ 234
Balance, end of period	$ 10,469					10,508	$ 10,469
Less: Current portion							69
Long-term portion							$ 10,400
Successor
Asset Retirement Obligation [Line Items]
Liabilities assumed from Business Combination						5,998
Liabilities incurred				$ 1,689
Liabilities settled				(1,249)
Liabilities transferred in sale of properties				(20)
Revisions to estimates				3,562
Accretion expense		$ 226		489
Balance, end of period		10,469		10,469		$ 0
Less: Current portion		1,300		1,300
Long-term portion		$ 9,169		9,169
Revisions related to property, plant and equipment				$ 3,000

XML

Long Term Debt, Net (Schedule of Long-Term Debt, Net) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Feb. 09, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Senior secured revolving credit facility		$ 134,100
7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
Stated interest rate of senior notes	7.875%
7.875% senior unsecured notes due 2024	$ 500,000
Successor
Debt Instrument [Line Items]
Total long-term debt, net	610,354
Successor | Eighth Amended And Restated Credit Agreement
Debt Instrument [Line Items]
Senior secured revolving credit facility	80,000
Successor | 7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
7.875% senior unsecured notes due 2024	500,000
Unamortized deferred financing costs	0
Successor | Senior Unsecured Notes
Debt Instrument [Line Items]
Unamortized premium on senior unsecured notes	$ 30,354
Predecessor
Debt Instrument [Line Items]
Total long-term debt, net			$ 607,440
Predecessor | 7th Amended And Restated Credit Agreement
Debt Instrument [Line Items]
Senior secured revolving credit facility			117,065
Predecessor | 7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
7.875% senior unsecured notes due 2024			500,000
Unamortized deferred financing costs			(9,625)
Predecessor | Senior Unsecured Notes
Debt Instrument [Line Items]
Unamortized premium on senior unsecured notes			$ 0

XML

Long Term Debt, Net (Narrative) (Details)	1 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended		12 Months Ended
	Feb. 08, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	Apr. 30, 2018 USD ($)	Feb. 09, 2018 USD ($)
Debt Instrument [Line Items]
Senior secured revolving credit facility									$ 134,100,000
Period following closing additional borrowings can be made					120 days
Default amount		$ 20,000,000		$ 20,000,000	$ 20,000,000
Fair value of senior notes payable		476,300,000		476,300,000	476,300,000
Bond premium amortization				3,300,000
7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
Senior secured revolving credit facility		$ 500,000,000		$ 500,000,000	$ 500,000,000
Stated interest rate of senior notes		7.875%		7.875%	7.875%
Redemption percentage of aggregate remaining outstanding					65.00%
Fair value of senior notes payable									533,600,000
7.875% Senior Unsecured Notes Due 2024 | Prior to December 15, 2019
Debt Instrument [Line Items]
Redemption price					107.875%
Redemption price plus make-whole premium					100.00%
7.875% Senior Unsecured Notes Due 2024 | Twelve Mos Beginning December 15, 2019
Debt Instrument [Line Items]
Redemption price					105.906%
7.875% Senior Unsecured Notes Due 2024 | Twelve Mos Beginning December 15, 2020
Debt Instrument [Line Items]
Redemption price					103.938%
7.875% Senior Unsecured Notes Due 2024 | Twelve Mos Beginning December 15, 2021
Debt Instrument [Line Items]
Redemption price					101.969%
7.875% Senior Unsecured Notes Due 2024 | Twelve Mos Beginning December 15, 2022
Debt Instrument [Line Items]
Redemption price					100.00%
Maximum | 7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
Redemption percentage of Senior Notes					35.00%
Eighth A&R Credit Facility
Debt Instrument [Line Items]
Debt issuance costs		$ 1,400,000		$ 1,400,000	$ 1,400,000
Successor
Debt Instrument [Line Items]
Bond premium amortization		1,200,000		(3,281,000)
Amortization of deferred financing costs		100,000		151,000
Successor | 7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
Senior secured revolving credit facility		500,000,000		500,000,000	500,000,000
Deferred financing costs, net		0		0	0
Successor | Eighth A&R Credit Facility
Debt Instrument [Line Items]
Credit facility amount									1,000,000,000.0
Credit facility borrowing base								$ 400,000,000
Senior secured revolving credit facility		80,000,000		80,000,000	80,000,000
Letter of credit outstanding		21,900,000		21,900,000	21,900,000
Total borrowing capacity remaining available for future use		$ 298,100,000		$ 298,100,000	$ 298,100,000
Maximum leverage ratio					4.0
Successor | Eighth A&R Credit Facility | Maximum
Debt Instrument [Line Items]
Credit facility borrowing base									350,000,000
Predecessor
Debt Instrument [Line Items]
Bond premium amortization	$ 0					$ 0
Deferred financing cost write-off							$ 11,400,000
Amortization of deferred financing costs	$ 171,000		$ 700,000			$ 2,205,000
Predecessor | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Margin interest rate					0.50%
Predecessor | 7th Amended And Restated Credit Agreement
Debt Instrument [Line Items]
Senior secured revolving credit facility							117,065,000
Predecessor | Credit Facility And Senior Notes [Member]
Debt Instrument [Line Items]
Deferred financing costs, net									0
Predecessor | 7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
Senior secured revolving credit facility							500,000,000
Deferred financing costs, net							$ 9,625,000
Predecessor | Eighth A&R Credit Facility
Debt Instrument [Line Items]
Minimum current ratio		1.0		1.0	1.0
Predecessor | Eighth A&R Credit Facility | Eurodollar
Debt Instrument [Line Items]
Margin interest rate					1.00%
Predecessor | Eighth A&R Credit Facility | Minimum | Eurodollar
Debt Instrument [Line Items]
Margin interest rate					2.00%
Predecessor | Eighth A&R Credit Facility | Minimum | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Margin interest rate					1.00%
Predecessor | Eighth A&R Credit Facility | Maximum | Eurodollar
Debt Instrument [Line Items]
Margin interest rate					3.00%
Predecessor | Eighth A&R Credit Facility | Maximum | Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Margin interest rate					2.00%
Level 1 | Successor | 7.875% Senior Unsecured Notes Due 2024
Debt Instrument [Line Items]
Fair value of senior notes payable									533,600,000
Senior Notes
Debt Instrument [Line Items]
Redemption price due to specific change of control events					101.00%
Senior Notes | Successor
Debt Instrument [Line Items]
Bond premium									$ 33,600,000

XML

Accounts Payable And Accrued Liabilities (Detail Of Accounts Payable And Accrued Liabilities) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Successor
Accounts Payable And Accrued Liabilities [Line Items]
Accruals for capital expenditures	$ 83,687
Revenues and royalties payable	44,626
Accruals for operating expenses/taxes	8,156
Accrued interest	11,651
Derivative settlement payable	4,593
Other	3,408
Total accrued liabilities	156,121
Accounts payable	71,018
Accounts payable and accrued liabilities	$ 227,139
Predecessor
Accounts Payable And Accrued Liabilities [Line Items]
Accruals for capital expenditures		$ 48,771
Revenues and royalties payable		29,514
Accruals for operating expenses/taxes		14,632
Accrued interest		2,587
Derivative settlement payable		2,106
Other		4,301
Total accrued liabilities		101,911
Accounts payable		68,578
Accounts payable and accrued liabilities		$ 170,489

XML

Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Thousands			1 Months Ended
	Apr. 01, 2018	Feb. 09, 2018	Jan. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Commitment And Contingencies [Line Items]
Additional lease commitment obligations	$ 17,600
Firm transportation contract				$ 5,700
Litigation
Commitment And Contingencies [Line Items]
Accounts payable and accrued liabilities					$ 4,700
Payment for legal fees			$ 4,700
Predecessor
Commitment And Contingencies [Line Items]
Accounts payable and accrued liabilities					$ 170,489
PAR value vested		$ 10,900
Successor
Commitment And Contingencies [Line Items]
Accounts payable and accrued liabilities				227,139
Nonqualified deferred compensation				$ 9,400

XML

Partners' Capital (Narrative) (Details) - SRII Opco, LP	Sep. 30, 2018	Feb. 09, 2018	Aug. 16, 2017
Alta Mesa Holdings GP, LLC
Partners' Capital l[Line Items]
Economic interests		100.00%
Voting interests		90.00%	90.00%
Common Class A | Alta Mesa Holdings GP, LLC
Partners' Capital l[Line Items]
Economic interests	100.00%
Common Class B
Partners' Capital l[Line Items]
Percentage of ownership	90.00%
Common Class B | Alta Mesa Holdings GP, LLC
Partners' Capital l[Line Items]
Voting interests	100.00%
Harlan H. Chappelle, Micheal Ellis, and Other Affiliates | Common Class B
Partners' Capital l[Line Items]
Percentage of ownership	10.00%

XML

Equity Based Compensation (Successor) (Narrative) (Details) $ in Thousands	8 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) shares	Sep. 30, 2018 USD ($) shares	Sep. 30, 2018 USD ($) shares
Vested during first year | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			33.33%
Vested during first year | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			33.33%
Vesting during second year | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			33.33%
Vesting during second year | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			33.33%
Vesting during third year | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			33.33%
Vesting during third year | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			33.33%
Successor
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expense		$ 6,714
Unrecognized compensation cost related to non-vested stock options	$ 16,200	16,200	$ 16,200
Options granted (in shares) | shares	4,704,433
Successor | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Period for unrecognized compensation cost			2 years 5 months 1 day
Successor | Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Period for unrecognized compensation cost			2 years 6 months 7 days
Unrecognized compensation cost	$ 10,100	10,100	$ 10,100
Successor | Performance Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period			3 years
Successor | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to non-vested stock options	$ 0	$ 0	$ 0
Successor | Long Term Incentive Plan | Alta Mesa Resources | Common Class A
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for issuance (in shares) | shares	50,000,000	50,000,000	50,000,000
Successor | Long Term Incentive Plan | Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period			7 years
Successor | Long Term Incentive Plan | Vested during first year | Performance Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			20.00%
Successor | Long Term Incentive Plan | Vesting during second year | Performance Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			30.00%
Successor | Long Term Incentive Plan | Vesting during third year | Performance Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested percentage			50.00%
Successor | Long Term Incentive Plan | Minimum | Performance Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares that may be earned			0.00%
Successor | Long Term Incentive Plan | Maximum | Performance Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of shares that may be earned			200.00%

XML

Equity Based Compensation (Successor) (Schedule Of Stock Option Plans) (Details) - Successor $ / shares in Units, $ in Thousands	8 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options - Outstanding, beginning balance (in shares)	0
Options - Granted (in shares)	4,704,433
Options - Exercised (in shares)	0
Options - Forfeited or expired (in shares)	(94,693)
Options - Outstanding, ending balance (in shares)	4,609,740
Options - Exercisable (in shares)	0
Weighted Average Exercise Price - Beginning balance (in dollars per share) | $ / shares	$ 0.00
Weighted Average Exercise Price Per Share - Granted (in dollars per share) | $ / shares	4.45
Weighted Average Exercise Price - Exercised (in dollars per share) | $ / shares	0.00
Weighted Average Exercise Price - Forfeited or expired (in dollars per share) | $ / shares	4.52
Weighted Average Exercise Price - Ending balance (in dollars per share) | $ / shares	$ 4.44
Weighted Average Remaining Term - Outstanding	6 years 5 months 12 days
Aggregate Intrinsic Value - Outstanding | $	$ 0

XML

Equity Based Compensation (Successor) (Summary Of Stock Options Granted And Valuation Assumptions) (Details) - Successor	8 Months Ended
	Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term (in years)	4 years 6 months
Expected stock volatility	64.60%
Dividend yield	0.00%
Risk-free interest rate	2.40%

XML

Equity Based Compensation (Successor) (Schedule Of Restricted Stock) (Details) - Successor - Restricted Stock	8 Months Ended
	Sep. 30, 2018 $ / shares shares
Restricted Stock Awards
Awards - Outstanding, beginning balance (in shares) | shares	0
Awards - Granted (in shares) | shares	1,658,756
Awards - Vested (in shares) | shares	0
Awards - Forfeited or expired (in shares) | shares	(42,086)
Awards - Outstanding, ending balance (in shares) | shares	1,616,670
Weighted Average Grant Date Fair Value per share
Weighted Average Grant-Date Fair Value - Outstanding, beginning balance (in dollars per share) | $ / shares	$ 0.00
Weighted Average Grant-Date Fair Value - Granted (in dollars per share) | $ / shares	7.77
Weighted Average Grant-Date Fair Value - Vested (in dollars per share) | $ / shares	0.00
Weighted Average Grant-Date Fair Value - Forfeited or expired (in dollars per share) | $ / shares	8.74
Weighted-Average Grant-Date Fair Value - Outstanding ending balance (in dollars per share) | $ / shares	$ 7.75

XML

Equity Based Compensation (Successor) (Schedule Of Restricted Stock Units) (Details) - Successor - Restricted Stock Units (RSUs)	8 Months Ended
	Sep. 30, 2018 $ / shares shares
PSUs
Awards - Outstanding, beginning balance (in shares) | shares	0
Awards - Granted (in shares) | shares	781,200
Awards - Vested (in shares) | shares	0
Awards - Forfeited or expired (in shares) | shares	(4,174)
Awards - Outstanding, ending balance (in shares) | shares	777,026
Weighted Average Grant - Date Fair Value per unit
Weighted Average Grant-Date Fair Value - Outstanding, beginning balance (in dollars per share) | $ / shares	$ 0.00
Weighted Average Grant-Date Fair Value - Granted (in dollars per share) | $ / shares	8.69
Weighted Average Grant-Date Fair Value - Vested (in dollars per share) | $ / shares	0.00
Weighted Average Grant-Date Fair Value - Forfeited or expired (in dollars per share) | $ / shares	8.45
Weighted-Average Grant-Date Fair Value - Outstanding ending balance (in dollars per share) | $ / shares	$ 8.69

XML

Related Party Transactions (Details) $ in Thousands	4 Months Ended	12 Months Ended
	Sep. 30, 2018 USD ($) well	Dec. 31, 2016 USD ($)	Feb. 08, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 13, 2016 well
BCE-STACK
Related Party Transaction [Line Items]
Advances from related party			$ 39,500
Marketing fees
Related Party Transaction [Line Items]
Marketing fees paid	$ 800
Successor
Related Party Transaction [Line Items]
Advances from related party	$ 16,917
Predecessor
Related Party Transaction [Line Items]
Advances from related party				$ 23,390
AEM | AM Contributor
Related Party Transaction [Line Items]
Ownership percentage	10.00%
Joint Development Agreement
Related Party Transaction [Line Items]
Number of wells to be drilled in three tranches | well					60
Number of additional wells to be drilled | well					20
Percent of interest reduced		12.50%
Percent of internal rate of return		25.00%
Joint Development Agreement | BCE-STACK
Related Party Transaction [Line Items]
Percent committed to fund working interest		100.00%
Percent of interest sold		80.00%
Percent of interest reduced		20.00%
Percent of internal rate of return		15.00%
Number of wells drilled | well	55
Joint Development Agreement | Maximum | BCE-STACK
Related Party Transaction [Line Items]
Drilling and completion costs		$ 3,200

XML

Subsequent Events (Details) $ in Millions	Nov. 09, 2018 USD ($) well	Sep. 30, 2018 USD ($)
Subsequent Event [Line Items]
Long-lived assets		$ 86.9
Affiliated Entity | Midstream | Subsequent Event
Subsequent Event [Line Items]
Number of produced water disposal wells sold | well	20
Proceeds from sale of produced water assets	$ 90.0