SandRidge Energy (SD) 10-Q 8 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 02, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	SANDRIDGE ENERGY INC
Entity Central Index Key	1,349,436
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		35,693,515

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 32,562	$ 99,143
Restricted cash - other	1,912	2,165
Accounts receivable, net	54,493	71,277
Derivative contracts	73	1,310
Prepaid expenses	2,223	5,248
Other current assets	350	15,954
Total current assets	91,613	195,097
Oil and natural gas properties, using full cost method of accounting
Proved	1,206,363	1,056,806
Unproved	68,737	100,884
Less: accumulated depreciation, depletion and impairment	(546,769)	(460,431)
Net oil and natural gas properties capitalized costs	728,331	697,259
Other property, plant and equipment, net	211,198	225,981
Other assets	1,181	1,290
Total assets	1,032,323	1,119,627
Current liabilities
Accounts payable and accrued expenses	112,980	139,155
Derivative contracts	36,905	10,627
Asset retirement obligations	40,041	41,017
Other current liabilities	7	8,115
Total current liabilities	189,933	198,914
Long-term debt	0	37,502
Derivative contracts	6,791	3,568
Asset retirement obligations	39,227	36,527
Other long-term obligations	3,837	3,176
Total liabilities	239,788	279,687
Commitments and contingencies (Note 11)
Stockholders’ Equity
Common stock, $0.001 par value; 250,000 shares authorized; 35,691 issued and outstanding at September 30, 2018 and 35,650 issued and outstanding at December 31, 2017	36	36
Warrants	88,517	88,500
Additional paid-in capital	1,054,155	1,038,324
Accumulated deficit	(350,173)	(286,920)
Total stockholders’ equity	792,535	839,940
Total liabilities and stockholders’ equity	$ 1,032,323	$ 1,119,627

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 30, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	35,691,000	35,650,000
Common stock, shares outstanding	35,691,000	35,650,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues
Oil, natural gas and NGL	$ 97,491	$ 80,540	$ 263,761	$ 263,235
Other	169	352	489	858
Total revenues	97,660	80,892	264,250	264,093
Expenses
Production	23,429	26,765	68,927	76,997
Production taxes	5,636	3,606	14,725	9,435
Depreciation and depletion—oil and natural gas	33,090	31,029	92,048	87,486
Depreciation and amortization—other	3,036	3,399	9,229	10,729
Impairment	0	498	4,170	3,475
General and administrative	9,251	20,292	33,616	59,184
Accelerated vesting upon change in control	0	0	6,545	0
Proxy contest	(459)	0	7,139	0
Employee termination benefits	23	0	32,653	4,815
Loss (gain) on derivative contracts	11,329	11,702	59,763	(46,024)
Other operating (income) expense	(105)	(132)	(1,343)	135
Total expenses	85,230	97,159	327,472	206,232
Income (loss) from operations	12,430	(16,267)	(63,222)	57,861
Other (expense) income
Interest expense, net	(627)	(872)	(2,226)	(2,757)
Gain on extinguishment of debt	0	0	1,151	0
Other (expense) income, net	(118)	197	972	2,222
Total other expense	(745)	(675)	(103)	(535)
Income (loss) before income taxes	11,685	(16,942)	(63,325)	57,326
Income tax benefit	(30)	(8,457)	(72)	(8,496)
Net income (loss)	$ 11,715	$ (8,485)	$ (63,253)	$ 65,822
Earnings (loss) per share
Basic (in dollars per share)	$ 0.33	$ (0.25)	$ (1.81)	$ 2.07
Diluted (in dollars per share)	$ 0.33	$ (0.25)	$ (1.81)	$ 2.06
Weighted average number of common shares outstanding
Basic (in shares)	35,308,000	34,290,000	34,971,000	31,750,000
Diluted (in shares)	35,330,000	34,290,000	34,971,000	31,984,000

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - 9 months ended Sep. 30, 2018 - USD ($) $ in Thousands	Total	Common Stock	Warrants	Additional Paid-In Capital	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2017	35,650,000	35,650,000	6,570,000
Beginning balance at Dec. 31, 2017	$ 839,940	$ 36	$ 88,500	$ 1,038,324	$ (286,920)
Increase (Decrease) in Stockholders' Equity
Issuance of stock awards, net of cancellations (in shares)		15,000
Issuance of stock awards, net of cancellations	0	$ 0		0
Common stock issued for general unsecured claims (in shares)		26,000
Common stock issued for general unsecured claims	0
Stock-based compensation	23,224			23,224
Issuance of warrants for general unsecured claims (in shares)			32,000
Issuance of warrants for general unsecured claims	0		$ 17	(17)
Cash paid for tax withholdings on vested stock awards	(7,376)			(7,376)
Net loss	$ (63,253)				(63,253)
Ending balance (in shares) at Sep. 30, 2018	35,691,000	35,691,000	6,602,000
Ending balance at Sep. 30, 2018	$ 792,535	$ 36	$ 88,517	$ 1,054,155	$ (350,173)

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net (loss) income	$ (63,253)	$ 65,822
Adjustments to reconcile net (loss) income to net cash provided by operating activities
Provision for doubtful accounts	(6)	133
Depreciation, depletion and amortization	101,277	98,215
Impairment	4,170	3,475
Debt issuance costs amortization	352	313
Amortization of premiums and discounts on debt	(47)	(231)
Gain on extinguishment of debt	(1,151)	0
Loss (gain) on derivative contracts	59,763	(46,024)
Cash (paid) received on settlement of derivative contracts	(29,025)	7,700
Stock-based compensation	22,415	12,616
Other	(1,734)	188
Changes in operating assets and liabilities	16,407	5,699
Net cash provided by operating activities	109,168	147,906
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures for property, plant and equipment	(146,819)	(152,743)
Acquisition of assets	0	(48,236)
Proceeds from sale of assets	14,497	19,769
Net cash used in investing activities	(132,322)	(181,210)
CASH FLOWS FROM FINANCING ACTIVITIES
Repayments of borrowings	(36,304)	0
Debt issuance costs	0	(1,488)
Cash paid for tax withholdings on vested stock awards	(7,376)	(3,766)
Net cash used in financing activities	(43,680)	(5,254)
NET DECREASE IN CASH, CASH EQUIVALENTS and RESTRICTED CASH	(66,834)	(38,558)
CASH, CASH EQUIVALENTS and RESTRICTED CASH, beginning of year	101,308	174,071
CASH, CASH EQUIVALENTS and RESTRICTED CASH, end of period	34,474	135,513
Supplemental Disclosure of Cash Flow Information
Cash received for income taxes	4,381	0
Supplemental Disclosure of Noncash Investing and Financing Activities
Change in accrued capital expenditures	29,141	(15,241)
Equity issued for debt	$ 0	$ (268,779)

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Nature of Business. SandRidge Energy, Inc. is an oil and natural gas exploration and production company headquartered in Oklahoma City, Oklahoma with its principal focus on developing high-return, growth-oriented projects in the U.S. Mid-Continent and North Park Basin of Colorado. Principles of Consolidation. The consolidated financial statements include the accounts of the Company and its wholly owned or majority owned subsidiaries, including its proportionate share of the Royalty Trusts. All significant intercompany accounts and transactions have been eliminated in consolidation. Interim Financial Statements. The accompanying unaudited condensed consolidated financial statements and notes have been derived from the Company's 2017 Form 10-K and should be read in conjunction with the audited financial statements and notes contained in the Company’s 2017 Form 10-K. Certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted, although the Company believes that the disclosures contained herein are adequate to make the information presented not misleading. In the opinion of management, the financial statements include all adjustments, which consist of normal recurring adjustments unless otherwise disclosed, necessary to fairly state the Company’s unaudited condensed consolidated financial statements. Significant Accounting Policies. The unaudited condensed consolidated financial statements were prepared in accordance with the accounting policies stated in the 2017 Form 10-K as well as the items noted below. Reclassifications. Certain reclassifications have been made to the prior period financial statements to conform to the current period presentation. These reclassifications have no effect on the Company’s previously reported results of operations. Use of Estimates. The preparation of the unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of assumptions, judgments and estimates include: oil, natural gas and natural gas liquids (“NGL”) reserves; impairment tests of long-lived assets; depreciation, depletion and amortization; income taxes; valuation of derivative instruments; contingencies; and accrued revenue and related receivables. Although management believes these estimates are reasonable, actual results could differ significantly. Recent Accounting Pronouncements. The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers (Topic 606),” which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. Its objective is to increase the usefulness of information in the financial statements regarding the nature, timing and uncertainty of revenues. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which deferred the effective date of ASU 2014-09 to January 1, 2018, for the Company. The ASU required adoption using either the retrospective transition method, which required restating previously reported results or the cumulative effect (modified retrospective) transition method, which utilized a cumulative-effect adjustment to retained earnings in the period of adoption to account for prior period effects rather than restating previously reported results. The Company adopted Topic 606 and all the related amendments (the “new revenue standard”) on January 1, 2018, using the modified retrospective transition method. See Note 2 for further discussion of the adoption of the new revenue standard. The FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other than Inventory,” which removed the prohibition in Accounting Standards Codification (“ASC”) 740 against the immediate recognition of current and deferred income tax effects of intra-entity transfers of assets other than inventory. The amendments in this ASU were effective for the Company on January 1, 2018, with early adoption permitted on January 1, 2017. The ASU required application on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company adopted the ASU on January 1, 2018. There was no impact to the Company’s consolidated financial statements and related disclosures upon adoption. The FASB issued ASU 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic: 610-20): Clarifying the Scope of Asset Derecognition Guidance and the Accounting for Partial Sales of Nonfinancial Assets,” which helps filers determine the guidance applicable for gain/loss recognition subsequent to the adoption of ASU 2014-09, Revenue from Contracts with Customers. The amendments also clarified that the derecognition of all businesses except those related to conveyances of oil and gas rights or contracts with customers should be accounted for in accordance with the derecognition and deconsolidation guidance in Topic 810, Consolidation. The Company adopted the ASU on January 1, 2018, using the modified retrospective transition method. Under this transition method the Company could have elected to apply this guidance retrospectively either to all contracts at the date of initial application or only to contracts that are not completed contracts at the date of initial application. The Company elected to evaluate only contracts that are not completed contracts. As there were no uncompleted contracts at January 1, 2018, there was no impact to the Company’s consolidated financial statements and related disclosures upon adoption. The FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement," which removes, modifies or adds disclosure requirements regarding fair value measurements. The amendments in this ASU are effective for all entities beginning after December 15, 2019, with amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty requiring prospective adoption and all other amendments requiring retrospective adoption. Early adoption is permitted and the Company elected to adopt this ASU during the third quarter of 2018, which resulted in a change to the Company's fair value measurement disclosures on a prospective basis, but had no impact on its consolidated financial statements. Recent Accounting Pronouncements Not Yet Adopted. The FASB issued ASU 2016-02, “Leases (Topic 842),” which requires lessees to recognize the assets and liabilities for the rights and obligations of all leases with a term greater than 12 months (long-term) on the balance sheet. Leases will be classified as financing or operating expenses, with the classification affecting the pattern and classification of expense recognition in the income statement. Leases to explore for or use oil and natural gas are not impacted by this guidance. In January 2018, the FASB issued ASU 2018-01, “Leases (Topic 842), Land Easement Practical Expedient for Transition to Topic 842.” This ASU permits an entity to continue to apply its current accounting policy for land easements that existed before the effective date of Topic 842. Once an entity adopts Topic 842, it would apply that Topic prospectively to all new (or modified) land easements to determine whether the arrangement contains a lease. ASU 2016-02 required adoption by application of a modified retrospective transition approach. In July 2018, the FASB issued ASU 2018-11, "Leases (Topic 842)." The amendments in this update provide another transition method whereby entities are allowed to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The amendments further provide lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component, similar to the expedient provided for lessees. The lessor practical expedient is limited to circumstances in which the nonlease component or components otherwise would be accounted for under the new revenue guidance and both (1) the timing and pattern of transfer are the same for the nonlease component(s) and associated lease component and (2) the lease component, if accounted for separately, would be classified as an operating lease. The amendments also clarify whether Topic 842 or Topic 606 applies for combined components. This topic is effective for the Company on January 1, 2019. Early adoption is permitted. Topic 842 provides a number of optional practical expedients in transition. The Company plans to elect the ‘package of practical expedients,’ which means the Company will not have to reassess under the new lease standard its prior conclusions about lease identification, lease classification and initial indirect costs. The Company also plans to elect the land easement practical expedient. The Company does not expect to elect the use-of-hindsight. Upon adoption, the Company anticipates recognizing assets and liabilities for the rights and obligations of its existing long-term operating leases on its consolidated balance sheets and utilizing new systems, processes and internal controls to properly identify, classify, measure and recognize new (or modified) leases after the date of adoption. While the effects of adoption are continuing to be assessed, the Company believes the primary impact of the lease standard relates to (1) recognizing assets and liabilities for the rights and obligations of the Company’s vehicle, drilling rig and equipment leases and, (2) providing new disclosures about the Company’s leasing activities. The Company will complete its evaluation during 2018 and will adopt Topic 842 on January 1, 2019. The Company expects to adopt this Topic using a modified retrospective approach by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The new leasing standard also provides practical expedients for an entity’s ongoing accounting. The Company currently plans to elect the short-term lease recognition exemption for leases that qualify, which means the Company will not recognize assets and liabilities for the rights and obligations of qualifying leases, including existing short-term leases of those assets in

Revenues

Revenues	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues The Company adopted the new revenue standard on January 1, 2018, using the modified retrospective method for all contracts outstanding on that date. Adoption of the new revenue standard had no impact on the Company’s consolidated balance sheet, results of operations, equity or cash flows as of the adoption date, and the Company does not expect any further material impact to its consolidated financial statements on an ongoing basis as a result of adopting the new revenue standard. The Company has included the disclosures required by the new revenue standard below. The following table disaggregates the Company’s revenue by source for the three and nine-month periods ended September 30, 2018 and 2017: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Oil $ 63,994 $ 44,032 $ 166,548 $ 147,792 NGL 18,776 15,391 52,111 42,962 Natural gas 14,721 21,117 45,102 72,481 Other 169 352 489 858 Total revenues $ 97,660 $ 80,892 $ 264,250 $ 264,093 Oil, natural gas and NGL revenues. A majority of the Company’s revenues come from sales of oil, natural gas and NGLs and are recorded at a point in time when control of the oil, natural gas and NGL production passes to the customer at the inlet of the processing plant or pipeline, or the delivery point for onloading to a delivery truck. As the Company’s customers obtain control of the production prior to selling it to other end customers, the Company presents its revenues on a net basis, rather than on a gross basis. Pricing for the Company’s oil, natural gas and NGL contracts is variable and is based on volumes sold multiplied by either an index price, net of deductions, or a percentage of the sales price obtained by the customer, which is also based on index prices. The transaction price is allocated on a pro-rata basis to each unit of oil, natural gas or NGL sold based on the terms of the contract. Oil, natural gas and NGL revenues are also recorded net of royalties, discounts and allowances, and transportation costs, as applicable. Taxes assessed by governmental authorities on oil, natural gas and NGL sales are presented separately from revenues and are included in production tax expense in the consolidated statements of operations. Revenues Receivable. The Company records an asset in accounts receivable, net on its consolidated balance sheet for revenues receivable from contracts with customers at the end of each period. Pricing for revenues receivable is estimated using current month crude oil, natural gas and NGL prices, net of deductions. Revenues receivable are typically collected the month after the Company delivers the related production to its customers. As of September 30, 2018, and December 31, 2017, the Company had revenues receivable of $33.7 million and $34.6 million, respectively, and did not record any bad debt expense on revenues receivable during the three and nine-month periods ended September 30, 2018. Practical expedients and exemptions. The Company elected not to retrospectively restate contracts that were modified prior to January 1, 2017, and assumed that the contract terms in place at January 1, 2018 were in place from the inception of the contract. Most of the Company's contracts are short-term in nature with a contract term of one year or less. The Company generally expenses certain insignificant costs when incurred rather than recognizing them as an asset because the amortization period would have been one year or less. Additionally, the Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less, and (ii) contracts for which revenue is recognized at the amount to which the Company has the right to invoice for services performed. Payment terms are typically within 30 days of control being transferred.

Proxy Contest

Proxy Contest	9 Months Ended
	Sep. 30, 2018
Other Income and Expenses [Abstract]
Proxy Contest	Proxy Contest In the second quarter of 2018, the Company received notification from Carl C. Icahn and certain affiliated entities (together, "Icahn"), that they intended to nominate a full slate of five candidates for election to the Board at the 2018 Annual Meeting of Stockholders (the "2018 annual meeting") that was held on June 19, 2018 (the "proxy contest"). The Company and Icahn, together with certain of their Board nominees, each entered into a settlement agreement pursuant to which the size of the Board was expanded to eight directors. The Board now consists of previously incumbent directors Sylvia K. Barnes, David J. Kornder and William M. Griffin, and newly elected members Bob G. Alexander, Jonathan Christodoro, Jonathan Frates, John J. "Jack" Lipinski and Randolph C. Read following the certification of the voting results, which occurred on June 22, 2018. As confirmed by external counsel, the election of a majority of non-incumbent directors nominated in connection with the proxy contest resulted in the accelerated vesting of certain share and incentive-based compensation awards granted to the Company's employees and directors as discussed further in Note 15. The Company incurred legal, consulting and advisory fees related to shareholder activism and the proxy contest, as well as the review of strategic alternatives of $7.1 million for the nine-month period ended September 30, 2018, which is net of $(0.5) million in fees which were reimbursed to the Company during the three-month period ended September 30, 2018.

Employee Termination Benefits

Employee Termination Benefits	9 Months Ended
	Sep. 30, 2018
Postemployment Benefits [Abstract]
Employee Termination Benefits	Employee Termination Benefits The following table presents a summary of employee termination benefits for the three and nine-month periods ended September 30, 2018 and 2017 (in thousands): Cash Share-Based Compensation (4) Number of Shares Total Employee Termination Benefits Three Months Ended September 30, 2018 Executive Employee Termination Benefits $ — $ — — $ — Other Employee Termination Benefits 23 — — 23 $ 23 $ — — $ 23 Three Months Ended September 30, 2017 Executive Employee Termination Benefits $ — $ — — $ — Other Employee Termination Benefits — — — — $ — $ — — $ — Nine Months Ended September 30, 2018 Executive Employee Termination Benefits (1) $ 11,945 $ 9,196 554 $ 21,141 Other Employee Termination Benefits (2) 7,577 3,935 209 11,512 $ 19,522 $ 13,131 763 $ 32,653 Nine Months Ended September 30, 2017 Executive Employee Termination Benefits (3) $ 2,500 $ 1,825 96 $ 4,325 Other Employee Termination Benefits 490 — — 490 $ 2,990 $ 1,825 96 $ 4,815 ____________________ 1. On February 8, 2018, the Company’s then current CEO, James Bennett, separated employment from the Company, and on February 22, 2018, the Company’s then current CFO, Julian Bott, also separated employment from the Company. In accordance with the terms of their respective employment agreements, the Company incurred cash severance costs and share-based compensation costs associated with the accelerated vesting of awards during the first quarter of 2018. 2. As a result of a reduction in workforce in the first quarter of 2018, certain employees received termination benefits including cash severance and accelerated share-based and incentive compensation vesting upon separation of service from the Company. 3. Includes cash severance costs and share-based compensation costs associated with the accelerated vesting of awards related to the departure of the Company's former Executive Vice President of Investor Relations and Strategy, Duane Grubert. 4. Share-based compensation recognized in connection with the accelerated vesting of restricted stock awards and performance share units upon the departure of certain executives and the reduction in workforce in the first quarter of 2018 reflects the remaining unrecognized compensation expense associated with these awards at the date of termination. The unrecognized compensation expense was calculated using the grant date fair value for restricted stock awards and performance share units. One share of the Company’s common stock was issued per performance share unit. See Note 15 for additional discussion of the Company’s share-based compensation awards.

Acquisitions and Divestitures

Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2018
Acquisitions and Divestitures [Abstract]
Acquisitions and Divestitures	Acquisitions and Divestitures Acquisition of Properties. In February 2017, the Company acquired assets consisting of approximately 13,000 net acres in Woodward County, Oklahoma for approximately $47.8 million in cash, net of post-closing adjustments. Also included in the acquisition were working interests in four wells previously drilled on the acreage. 2017 Property Divestitures. During the nine-month period ended September 30, 2017, the Company divested various non-core oil and natural gas properties for approximately $16.0 million in cash. All of these divestitures were accounted for as adjustments to the full cost pool with no gain or loss recognized.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Company measures and reports certain assets and liabilities on a fair value basis and has classified and disclosed its fair value measurements using the levels of the fair value hierarchy noted below. The carrying values of cash, restricted cash, accounts receivable, prepaid expenses, certain other current assets and other assets, accounts payable and accrued expenses, other current liabilities and other long-term obligations included in the unaudited condensed consolidated balance sheets approximated fair value at September 30, 2018, and December 31, 2017. As a result, these financial assets and liabilities are not discussed below. The fair values of property, plant and equipment classified as assets held for sale and related impairments, which are calculated using Level 3 inputs, are discussed in Note 7. Level 1 Unadjusted quoted prices in active markets that are accessible at the measurement date for identical, unrestricted assets or liabilities. Level 2 Quoted prices in markets that are not active, or inputs which are observable, either directly or indirectly, for substantially the full term of the asset or liability. Level 3 Measurement based on prices or valuation models that require inputs that are both significant to the fair value measurement and less observable for objective sources (i.e., supported by little or no market activity). Assets and liabilities that are measured at fair value are classified based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement requires judgment, which may affect the valuation of the fair value of assets and liabilities and their placement within the fair value hierarchy levels. The determination of the fair values, stated below, considers the market for the Company’s financial assets and liabilities, the associated credit risk and other factors. The Company considers active markets as those in which transactions for the assets or liabilities occur in sufficient frequency and volume to provide pricing information on an ongoing basis. The Company has assets and liabilities classified in Level 2 of the hierarchy as of September 30, 2018, and Level 1 and Level 2 as of December 31, 2017, as described below. Level 1 Fair Value Measurements Investments. The fair value of investments, consisting of assets attributable to the Company’s non-qualified deferred compensation plan, is based on quoted market prices. Investments of $5.1 million are included in other current assets in the accompanying unaudited condensed consolidated balance sheet at December 31, 2017. The Company’s non-qualified deferred compensation plan was terminated and all remaining investment balances were distributed to participants in January 2018. Level 2 Fair Value Measurements Commodity Derivative Contracts. The fair values of the Company’s oil and natural gas fixed price swaps are based upon inputs that are either readily available in the public market, such as oil and natural gas futures prices, volatility factors and discount rates, or can be corroborated from active markets. Fair value is determined through the use of a discounted cash flow model or option pricing model using the applicable inputs discussed above. The Company applies a weighted average credit default risk rating factor for its counterparties or gives effect to its credit default risk rating, as applicable, in determining the fair value of these derivative contracts. Credit default risk ratings are based on current published credit default swap rates. Fair Value - Recurring Measurement Basis The following tables summarize the Company’s assets and liabilities measured at fair value on a recurring basis by the fair value hierarchy (in thousands): September 30, 2018 Fair Value Measurements Netting(1) Assets/Liabilities at Fair Value Level 1 Level 2 Level 3 Assets Commodity derivative contracts $ — $ 224 $ — $ (151) $ 73 $ — $ 224 $ — $ (151) $ 73 Liabilities Commodity derivative contracts $ — $ 43,847 $ — $ (151) $ 43,696 $ — $ 43,847 $ — $ (151) $ 43,696 December 31, 2017 Fair Value Measurements Netting(1) Assets/Liabilities at Fair Value Level 1 Level 2 Level 3 Assets Commodity derivative contracts $ — $ 5,582 $ — $ (4,272) $ 1,310 Investments 5,072 — — — 5,072 $ 5,072 $ 5,582 $ — $ (4,272) $ 6,382 Liabilities Commodity derivative contracts $ — $ 18,467 $ — $ (4,272) $ 14,195 $ — $ 18,467 $ — $ (4,272) $ 14,195 ____________________ 1. Represents the effect of netting assets and liabilities for counterparties with which the right of offset exists. Transfers. The Company did not have any transfers between Level 1, Level 2 or Level 3 fair value measurements during the three and nine-month periods ended September 30, 2018 and 2017. Fair Value of Financial Instruments - Long-Term Debt The Company measured the fair value of its $35.0 million initial principal note, as amended in February 2017, which was secured by first priority mortgages on the Company’s real estate in Oklahoma City, Oklahoma (the “Building Note”) using a discounted cash flow analysis, which is classified as a Level 2 input in the fair value hierarchy. The Company repaid the Building Note in full during the first quarter of 2018. The estimated fair values and carrying values of the Company’s long-term debt are as follows (in thousands): September 30, 2018 December 31, 2017 Fair Value Carrying Value Fair Value Carrying Value Building Note $ — $ — $ 42,526 $ 37,502 See Note 9 for additional discussion of the Company’s long-term debt.

Property, Plant and Equipment

Property, Plant and Equipment	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment Property, plant and equipment consists of the following (in thousands): September 30, 2018 December 31, 2017 Oil and natural gas properties Proved $ 1,206,363 $ 1,056,806 Unproved 68,737 100,884 Total oil and natural gas properties 1,275,100 1,157,690 Less accumulated depreciation, depletion and impairment (546,769) (460,431) Net oil and natural gas properties capitalized costs 728,331 697,259 Land 4,500 4,500 Electrical infrastructure 131,010 131,010 Other non-oil and natural gas equipment 19,671 26,809 Buildings and structures 79,548 79,548 Total 234,729 241,867 Less accumulated depreciation and amortization (23,531) (15,886) Other property, plant and equipment, net 211,198 225,981 Total property, plant and equipment, net $ 939,529 $ 923,240 The Company had approximately $10.6 million in assets classified as held for sale in the other current assets line of the accompanying consolidated balance sheet at December 31, 2017. Approximately $9.3 million of the total at December 31, 2017 was related to one of the Company’s properties located in downtown Oklahoma City, OK, which was classified as held for sale in the fourth quarter of 2017 and sold during the second quarter of 2018 for approximately $10.4 million, net of transaction fees. The resulting gain of $1.1 million was recorded in other operating expense on the accompanying condensed consolidated statements of operations for the nine-month period ended September 30, 2018. Additionally, during the first quarter of 2018, the Company classified its remaining midstream generator assets as held for sale. These assets had a carrying value of $5.7 million which exceeded the estimated net realizable value of $1.6 million based on expected sales prices obtained from third parties. As a result, the Company recorded an impairment of $4.1 million for the nine-month period ended September 30, 2018. The midstream generator assets were sold during the second quarter of 2018 with no gain or loss recognized on the sale.

Accounts Payable and Accrued Ex

Accounts Payable and Accrued Expenses	9 Months Ended
	Sep. 30, 2018
Payables and Accruals [Abstract]
Accounts Payable and Accrued Expenses	Accounts Payable and Accrued Expenses Accounts payable and accrued expenses consist of the following (in thousands): September 30, 2018 December 31, 2017 Accounts payable and other accrued expenses $ 54,957 $ 75,191 Accrued interest 65 1,385 Revenues and royalties payable 42,075 37,274 Payroll and benefits 15,719 21,475 Drilling advances 164 3,830 Total accounts payable and accrued expenses $ 112,980 $ 139,155

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Credit Facility. On February 10, 2017, the $425.0 million reserve-based revolving credit facility (the “First Lien Exit Facility”) was refinanced and replaced by a new $600.0 million credit facility (the “credit facility”). The borrowing base under the credit facility was reduced from $425.0 million to $350.0 million during the October 2018 semi-annual redetermination. The next borrowing base redetermination is scheduled for April 1, 2019. The credit facility matures on March 31, 2020. The outstanding borrowings under the credit facility bear interest based on a pricing grid tied to borrowing base utilization of (a) LIBOR plus an applicable margin that varies from 3.00% to 4.00% per annum, or (b) the base rate plus an applicable margin that varies from 2.00% to 3.00% per annum. Interest on base rate borrowings is payable quarterly in arrears and interest on LIBOR borrowings is payable every one, two, three or six months, at the election of the Company. Quarterly, the Company pays commitment fees assessed at annual rates of 0.50% on any available portion of the credit facility. The Company has the right to prepay loans under the credit facility at any time without a prepayment penalty, other than customary “breakage” costs with respect to LIBOR loans. Upon refinancing of the First Lien Exit Facility, $50.0 million maintained in a restricted cash collateral account, as required by the terms of the First Lien Exit Facility, was released to the Company. The credit facility is secured by (i) first-priority mortgages on at least 95% of the PV-9 valuation of all proved reserves included in the most recently delivered reserve report of the Company, (ii) a first-priority perfected pledge of substantially all of the capital stock owned by each credit party and equity interests in the Royalty Trusts that are owned by a credit party and (iii) a first-priority perfected security interest in substantially all the cash, cash equivalents, deposits, securities and other similar accounts, and other tangible and intangible assets of the credit parties (including but not limited to as-extracted collateral, accounts receivable, inventory, equipment, general intangibles, investment property, intellectual property, real property and the proceeds of the foregoing). The credit facility requires the Company to maintain (i) a maximum consolidated total net leverage ratio, measured as of the end of any fiscal quarter, of no greater than 3.50 to 1.00 and (ii) a minimum consolidated interest coverage ratio, measured as of the end of any fiscal quarter, of no less than 2.25 to 1.00. These financial covenants are subject to customary cure rights. The Company was in compliance with all applicable financial covenants under the credit facility as of September 30, 2018. The credit facility contains customary affirmative and negative covenants, including as to compliance with laws (including environmental laws, ERISA and anti-corruption laws), maintenance of required insurance, delivery of quarterly and annual financial statements, oil and gas engineering reports, maintenance and operation of property (including oil and gas properties), restrictions on the incurrence of liens, indebtedness, asset dispositions, fundamental changes, restricted payments including dividends and other customary covenants. The Company was in compliance with these covenants as of September 30, 2018. The credit facility includes events of default relating to customary matters, including, among other things, nonpayment of principal, interest or other amounts; violation of covenants; incorrectness of representations and warranties in any material respect; cross-payment default and cross acceleration with respect to indebtedness in an aggregate principal amount of $25.0 million or more; bankruptcy; judgments involving a liability of $25.0 million or more that are not paid; and ERISA events. Many events of default are subject to customary notice and cure periods. The credit facility also provides that a change in control, as defined therein, constitutes an event of default. In connection with the change in the majority of the members of the Company’s Board that occurred as a result of the 2018 annual meeting in June 2018, the Company entered into a consent and waiver agreement with the administrative agent and certain lenders constituting the majority lenders under the credit facility. The consent and waiver agreement waived any event of default which might have occurred as a result of the change in the majority of the members of the Company’s Board and recognized the new members of the Board as existing members of the Board under the definition of change in control in the credit agreement. The Company had no amounts outstanding under the credit facility at September 30, 2018, and $6.2 million in outstanding letters of credit, which reduce availability under the credit facility on a dollar-for-dollar basis. Building Note. On October 4, 2016 (the “Emergence Date”), in accordance with the joint plan of organization (the "Plan") of the Company and certain of its direct and indirect subsidiaries (collectively, the “Debtors"), the Company entered into the Building Note, which had an initial principal amount of $35.0 million. Net proceeds of $26.8 million received from the sale of the Building Note were remitted to unsecured creditors on the Emergence Date. The Company repaid the Building Note in full in February 2018. Interest was payable on the Building Note at 6% per annum for the first year following the Emergence Date, 8% per annum for the second year following the Emergence Date, and 10% thereafter through maturity. Interest costs were

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivatives	Derivatives Commodity Derivatives The Company is exposed to commodity price risk, which impacts the predictability of its cash flows from the sale of oil and natural gas. The Company, on occasion, has sought to manage this risk through the use of commodity derivative contracts, which allow the Company to limit its exposure to commodity price volatility on a portion of its forecasted oil and natural gas sales. The Company has not designated any of its derivative contracts as hedges for accounting purposes and records all derivative contracts at fair value with changes in derivative contract fair values recognized as gain or loss on derivative contracts in the unaudited condensed consolidated statements of operations. None of the Company’s commodity derivative contracts may be terminated prior to contractual maturity solely as a result of a downgrade in the credit rating of a party to the contract. Commodity derivative contracts are settled on a monthly basis. On a quarterly basis, the commodity derivative contract valuations are adjusted to the mark-to-market valuation. At September 30, 2018, the Company’s commodity derivative contracts consisted of fixed price swaps under which the Company receives a fixed price for the contract and pays a floating market price to the counterparty over a specified period for a contracted volume. The Company recorded losses on commodity derivative contracts of $11.3 million and $11.7 million for the three-month periods ended September 30, 2018, and 2017, respectively, which include net cash payments (receipts) upon settlement of $11.6 million and $(5.0) million, respectively. The Company recorded loss (gain) on commodity derivative contracts of $59.8 million and $(46.0) million for the nine-month periods ended September 30, 2018, and 2017, respectively, which include net cash payments (receipts) upon settlement of $29.0 million and $(7.7) million, respectively. On June 26, 2018, the Board suspended the Company's ability to enter into new commodity derivative contracts pending review. In November 2018, the Board concluded this comprehensive evaluation of its commodity derivatives program and determined that no action should be taken with respect to outstanding derivatives contracts at this time. Future derivative transactions will require Board approval. Master Netting Agreements and the Right of Offset. The Company has master netting agreements with all of its commodity derivative counterparties and has presented its derivative assets and liabilities with the same counterparty on a net basis in the unaudited condensed consolidated balance sheets. As a result of the netting provisions, the Company's maximum amount of loss under commodity derivative transactions due to credit risk is limited to the net amounts due from its counterparties. As of September 30, 2018, the counterparties to the Company’s open commodity derivative contracts consisted of five financial institutions, all of which are also lenders under the Company’s credit facility. The Company is not required to post additional collateral under its commodity derivative contracts as all of the counterparties to the Company’s commodity derivative contracts share in the collateral supporting the Company’s credit facility. The following tables summarize (i) the Company's commodity derivative contracts on a gross basis, (ii) the effects of netting assets and liabilities for which the right of offset exists based on master netting arrangements and (iii) for the Company’s net derivative liability positions, the applicable portion of shared collateral under the credit facility as of September 30, 2018, and December 31, 2017 (in thousands): September 30, 2018 Gross Amounts Gross Amounts Offset Amounts Net of Offset Financial Collateral Net Amount Assets Derivative contracts - current $ 224 $ (151) $ 73 $ — $ 73 Derivative contracts - noncurrent — — — — — Total $ 224 $ (151) $ 73 $ — $ 73 Liabilities Derivative contracts - current $ 37,056 $ (151) $ 36,905 $ (36,905) $ — Derivative contracts - noncurrent 6,791 — 6,791 (6,791) — Total $ 43,847 $ (151) $ 43,696 $ (43,696) $ — December 31, 2017 Gross Amounts Gross Amounts Offset Amounts Net of Offset Financial Collateral Net Amount Assets Derivative contracts - current $ 5,582 $ (4,272) $ 1,310 $ — $ 1,310 Derivative contracts - noncurrent — — — — — Total $ 5,582 $ (4,272) $ 1,310 $ — $ 1,310 Liabilities Derivative contracts - current $ 14,899 $ (4,272) $ 10,627 $ (10,627) $ — Derivative contracts - noncurrent 3,568 — 3,568 (3,568) — Total $ 18,467 $ (4,272) $ 14,195 $ (14,195) $ — At September 30, 2018, the Company’s open commodity derivative contracts consisted of the following: Oil Price Swaps Notional (MBbls) Weighted Average Fixed Price October 2018 - December 2018 828 $ 56.12 January 2019 - December 2019 1,825 $ 54.29 Natural Gas Price Swaps Notional (MMcf) Weighted Average Fixed Price October 2018 - December 2018 3,680 $ 3.11 Fair Value of Derivatives The following table presents the fair value of the Company’s derivative contracts as of September 30, 2018, and December 31, 2017, on a gross basis without regard to same-counterparty netting (in thousands): Type of Contract Balance Sheet Classification September 30, 2018 December 31, 2017 Derivative assets Natural gas price swaps Derivative contracts-current $ 224 $ 5,582 Derivative liabilities Oil price swaps Derivative contracts-current (37,056) (14,899) Oil price swaps Derivative contracts-noncurrent (6,791) (3,568) Total net derivative contracts $ (43,623) $ (12,885)

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Legal Proceedings. On October 14, 2016, Lisa West and Stormy Hopson filed an amended class action complaint in the United States District Court for the Western District of Oklahoma against SandRidge Exploration and Production, LLC, among other defendants. In their amended complaint, plaintiffs asserted various tort claims seeking relief for damages, including the reimbursement of past and future earthquake insurance premiums, resulting from seismic activity allegedly caused by the defendants’ operation of wastewater disposal wells. The court dismissed the plaintiffs’ amended complaint on May 12, 2017, but permitted the plaintiffs to file a second amended complaint. On July 18, 2017, the plaintiffs filed a second amended class action complaint making allegations substantially similar to those contained in the amended complaint that was previously dismissed. On August 13, 2018, the court granted the Company’s motion to dismiss, thereby dismissing the Company from the lawsuit. As previously disclosed, on May 16, 2016, the Debtors filed voluntary petitions for reorganization under Chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Southern District of Texas (the “Bankruptcy Court”). The Bankruptcy Court confirmed the Plan on September 9, 2016, and the Debtors subsequently emerged from bankruptcy on October 4, 2016. Pursuant to the Plan, claims against the Company were discharged without recovery in each of the following consolidated cases (the “Cases”): • In re SandRidge Energy, Inc. Securities Litigation, Case No. 5:12-cv-01341-LRW, USDC, Western District of Oklahoma • Ivan Nibur, Lawrence Ross, Jase Luna, Matthew Willenbucher, and the Duane & Virginia Lanier Trust v. SandRidge Mississippian Trust I, et al., Case No. 5:15-cv-00634-SLP, USDC, Western District of Oklahoma • Barton W. Gernandt Jr., et al. v. SandRidge Energy, Inc., Case No. 5:15-cv-00834-D, USDC, Western District of Oklahoma Although the Cases have not been dismissed against certain former officers and directors who remain defendants in the Cases, the Company remains as a nominal defendant in each of the Cases so that any of the respective plaintiffs may seek to recover proceeds from any applicable insurance policies or proceeds. In each of the Cases, to the extent liability exceeds the amount of available insurance proceeds, the Company may owe indemnity obligations to its former officers and/or directors who remain as defendants in such action. An estimate of reasonably probable losses associated with any of the Cases cannot be made at this time, however the Company believes that any potential liability with respect to the Cases will not be material. The Company has not established any reserves relating to any of the Cases. In addition to the matters described above, the Company is involved in various lawsuits, claims and proceedings which are being handled and defended by the Company in the ordinary course of business. Pursuant to the terms of the SandRidge Mississippian Trust I and SandRidge Mississippian Trust II, the Company is obligated to indemnify each Royalty Trust against losses, claims, damages, liabilities and expenses, including reasonable costs of investigation and attorney’s fees and expenses arising out of certain legal matters as stipulated in the respective agreements with each Royalty Trust. Restricted Cash . Restricted cash - other included on the unaudited condensed consolidated balance sheets at September 30, 2018, and December 31, 2017 is the cash portion of consideration set aside for future settlement of general unsecured claims related to the Chapter 11 proceedings in accordance with the Plan. The corresponding liability for future cash settlements of general unsecured claims is included in accounts payable and accrued expenses on the unaudited condensed consolidated balance sheets. Risks and Uncertainties. The Company’s revenue, profitability and future growth are substantially dependent upon the prevailing and future prices for oil and natural gas, which depend on numerous factors beyond the Company’s control such as overall oil and natural gas production and inventories in relevant markets, economic conditions, the global political environment, regulatory developments and competition from other energy sources. Oil and natural gas prices historically have been volatile, and may be subject to significant fluctuations in the future. The Company has historically entered into commodity derivative arrangements in order to mitigate a portion of the effect of this price volatility on the Company’s cash flows. The Company may not fully benefit from increases in the market price of oil and natural gas during periods where the strike prices for the Company's commodity derivative contracts are below market prices at the time of settlement. See Note 10 for the Company’s open oil and natural gas derivative contracts. The Company historically has depended on cash flows from operating activities and, as necessary, borrowings under its credit facility to fund its capital expenditures. Based on its cash balances, cash flows from operating activities and net borrowing availability under the credit facility, the Company expects to be able to fund its planned capital expenditures budget, working capital needs, and any potential debt service requirements for the next year; however, if oil or natural gas prices decline from current levels, they could have a material adverse effect on the Company’s financial position, results of operations, cash flows and quantities of oil, natural gas and NGL reserves that may be economically produced. Potential decreases in the Company's cash flows from operating activities during periods of declining market prices of oil and natural gas may be offset to the extent the Company has commodity derivative contracts in place that have strike prices above market prices at the time of settlement.

Equity

Equity	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Equity	Equity Common Stock and Performance Share Units. At September 30, 2018, the Company had 35.7 million shares of common stock, par value $0.001 per share, issued and outstanding, including 0.4 million shares of unvested restricted stock awards, and 250.0 million shares of common stock authorized. In accordance with normal practices, the Company granted additional restricted stock awards and an immaterial amount of performance share units in the third quarter of 2018. Accelerated Vesting upon Change in Control. As a result of the election of a majority of non-incumbent directors nominated in connection with the proxy contest in the second quarter of 2018, and on the advice of outside counsel, vesting was accelerated for the majority of the Company's then-outstanding unvested restricted stock awards and all of the Company's then-outstanding unvested performance share units. See Note 3 and Note 15 for additional discussion of this event.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For each interim reporting period, the Company estimates the effective tax rate expected for the full fiscal year and uses that estimated rate in providing for income taxes on a current year-to-date basis. The provision for income taxes consisted of the following components (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Current Federal $ (33) $ (8,460) $ (33) $ (8,460) State 3 3 (39) (36) Total provision $ (30) $ (8,457) $ (72) $ (8,496) Deferred income taxes are provided to reflect the future tax consequences of temporary differences between the tax basis of assets and liabilities and their reported amounts in the financial statements. The Company’s deferred tax assets have been reduced by a valuation allowance due to a determination that it is more likely than not that some or all of the deferred assets will not be realized based on the weight of all available evidence. The Company continues to closely monitor and weigh all available evidence, including both positive and negative, in making its determination whether to maintain a valuation allowance. As a result of the significant weight placed on the Company's cumulative negative earnings position, the Company continued to maintain a full valuation allowance against its net deferred tax asset at September 30, 2018. Thus, the Company’s effective tax rate and expense for the three and nine-month periods ended September 30, 2018 continue to be low. The “Tax Cuts and Jobs Act” (the “TCJA”) enacted in December 2017 includes significant changes to the taxation of business entities, most of which are effective for taxable years beginning after December 31, 2017. These changes include, among others, a permanent reduction to the corporate income tax rate from a maximum 35% to a flat 21% rate, expansion of expensing capital expenditures for a period of time, new limitations on the utilization of net operating losses (“NOLs”), and limitations on the deduction of interest expense and executive compensation. We continue to evaluate the impact of the TCJA as new guidance and accounting interpretations become available and while adjustments to certain deferred tax assets may occur in 2018, we do not expect a material adjustment to the provisional amounts recorded for the year ended December 31, 2017 or the nine-month period ended September 30, 2018. Internal Revenue Code (“IRC”) Section 382 addresses company ownership changes and specifically limits the utilization of certain deductions and other tax attributes on an annual basis following an ownership change. As a result of the Chapter 11 reorganization and related transactions, the Company experienced an ownership change within the meaning of IRC Section 382 on October 4, 2016 that subjected certain of the Company’s tax attributes, including $1.9 billion of federal NOL carryforwards, to the IRC Section 382 limitation. This limitation is expected to result in $1.6 billion of the $1.9 billion of federal NOL carryforwards expiring unused. As such, the Company’s deferred tax asset associated with NOLs and corresponding valuation allowance were reduced in the period ended December 31, 2017. The limitation did not result in a current tax liability for the tax year ended December 31, 2017 or the nine-month period ended September 30, 2018. Since the October 4, 2016 ownership change the Company has generated additional NOLs that are not currently subject to an IRC Section 382 limitation. See "Note 19 - Income Taxes" in the 2017 Form 10-K for additional discussion with respect to the impact of income tax elections associated with the Chapter 11 reorganization.

Earnings (Loss) per Share

Earnings (Loss) per Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings (Loss) per Share	Earnings (Loss) per Share The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings (loss) per share: Net Income (Loss) Weighted Average Shares Earnings (Loss) Per Share (In thousands, except per share amounts) Three Months Ended September 30, 2018 Basic earnings per share $ 11,715 35,308 $ 0.33 Effect of dilutive securities Restricted stock awards — 22 Performance share units(1) — — Warrants(2) — — Diluted earnings per share $ 11,715 35,330 $ 0.33 Three Months Ended September 30, 2017 Basic loss per share $ (8,485) 34,290 $ (0.25) Effect of dilutive securities Restricted stock awards(3) — — Performance share units(3) — — Warrants(2) — — Diluted loss per share $ (8,485) 34,290 $ (0.25) Nine Months Ended September 30, 2018 Basic loss per share $ (63,253) 34,971 $ (1.81) Effect of dilutive securities Restricted stock awards(4) — — Performance share units(1) — — Warrants(2) — — Diluted loss per share $ (63,253) 34,971 $ (1.81) Nine Months Ended September 30, 2017 Basic earnings per share $ 65,822 31,750 $ 2.07 Effect of dilutive securities Restricted stock awards — 234 Performance share units(1) — — Warrants(2) — — Diluted earnings per share $ 65,822 31,984 $ 2.06 ____________________ 1. No incremental shares of potentially dilutive performance share units were included for the three-month period ended September 30, 2018, or the nine-month periods ended September 30, 2018, or 2017, as their effect was antidilutive under the treasury stock method. 2. No incremental shares of potentially dilutive warrants were included for the three and nine-month periods ended September 30, 2018, or 2017, as their effect was antidilutive. 3. Restricted stock awards covering 0.1 million shares and performance share units covering an insignificant amount of shares for the three-month period ended September 30, 2017, were excluded from the computation of loss per share because their effect would have been antidilutive. 4. No incremental shares of potentially dilutive restricted stock awards were included for the nine-month period ended September 30, 2018, as their effect was antidilutive under the treasury stock method. See Note 15 for discussion of the Company’s share-based compensation awards.

Share and Incentive-Based Compe

Share and Incentive-Based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share and Incentive-Based Compensation	Share and Incentive-Based Compensation Share-Based Compensation Omnibus Incentive Plan. The Company's Omnibus Incentive Plan became effective in October 2016. The Omnibus Incentive Plan authorizes the issuance of up to 4.6 million shares of SandRidge common stock to eligible persons including non-employee directors of the Company, employees of the Company or any of its affiliates, and certain consultants and advisers to the Company or any of its affiliates. The types of awards that may be granted under the Omnibus Incentive Plan include stock options, restricted stock, performance awards and other forms of awards granted or denominated in shares of the Company’s common stock, as well as certain cash-settled awards. At September 30, 2018, the Company had restricted stock awards and an immaterial amount of performance share units outstanding under the Omnibus Incentive Plan. Restricted Stock Awards. The Company’s restricted stock awards are equity-classified awards and are valued based upon the market value of the Company’s common stock on the date of grant. Vesting for certain restricted stock awards was accelerated in connection with executive terminations and a reduction in force in the first quarter of 2018 with the majority of the remaining restricted stock awards vesting in June 2018 as a result of the accelerated vesting upon change in control event discussed in Note 3. In August 2018, the Company granted additional restricted stock awards. Outstanding restricted shares will generally vest over either a one-year period or three-year period. The following table presents a summary of the Company’s unvested restricted stock awards: Number of Shares Weighted Average Grant Date Fair Value (In thousands) Unvested restricted shares outstanding at December 31, 2017 1,105 $ 22.62 Granted 366 $ 16.06 Vested (1,049) $ 22.71 Forfeited / Canceled (39) $ 21.61 Unvested restricted shares outstanding at September 30, 2018 383 $ 16.22 As of September 30, 2018, the Company's unrecognized compensation cost related to unvested restricted stock awards totaled $5.6 million. The remaining weighted average contractual period over which this compensation cost may be recognized is 2.4 years. The aggregate intrinsic value of restricted stock that vested during the nine-month period ended September 30, 2018 was approximately $15.9 million based on the stock price at the time of vesting. Performance Share Units . In February 2017, the Company granted equity-classified awards in the form of performance share units. The vesting for certain performance share units was accelerated in connection with executive terminations and a reduction in force in the first quarter of 2018 with all remaining units vesting in June 2018 as a result of the accelerated vesting upon change in control event discussed in Note 3. All performance share units for which vesting was accelerated were settled in shares of the Company’s common stock with one share of common stock being issued per performance share unit. In September 2018, the Company granted an immaterial amount of additional performance share units. The following table presents a summary of the Company’s performance share units: Number of Units Fair Value per Unit at September 30, 2018 (In thousands) Unvested performance share units outstanding at December 31, 2017 183 Granted 111 Vested (177) Forfeited / Canceled (6) Unvested performance share units outstanding at September 30, 2018 111 $ 20.41 The aggregate intrinsic value of performance share units that vested during the nine-month period ended September 30, 2018 was approximately $2.7 million based on the stock price at the time of vesting. Incentive-Based Compensation Performance Units . In October 2016, the Company granted liability-classified awards in the form of performance units. The vesting for certain performance units was accelerated in connection with executive terminations and a reduction in force in the first quarter of 2018 with all remaining units vesting in June 2018 as a result of the accelerated vesting upon change in control acceleration event discussed in Note 3. The accelerated performance units were paid at the issuance value of $100 each. The value for previous vestings was determined by annual scorecard results. The following table presents a summary of the Company’s performance units: Number of Units Fair Value per Unit at September 30, 2018 (In thousands) Unvested performance units outstanding at December 31, 2017 49 Granted — Vested (48) Forfeited / Canceled (1) Unvested performance units outstanding at September 30, 2018 — — The aggregate intrinsic value of performance units that vested during the nine-month period ended September 30, 2018 was approximately $4.8 million. The following tables summarize share and incentive-based compensation for the three and nine-month periods ended September 30, 2018, and 2017 (in thousands): Recurring Compensation Expense(1) Executive Terminations(2) Reduction in Force(2) Change in Control(3) Total Three Months Ended September 30, 2018 Equity-classified awards: Restricted stock awards $ 523 $ — $ — $ — $ 523 Performance share units 41 — — — 41 Total share-based compensation expense 564 — — — 564 Less: Capitalized compensation expense (58) — — — (58) Share-based compensation expense, net $ 506 $ — $ — $ — $ 506 Three Months Ended September 30, 2017 Equity-classified awards: Restricted stock awards $ 3,084 $ — $ — $ — $ 3,084 Performance share units 397 — — — 397 Total share-based compensation expense 3,481 — — — 3,481 Liability-classified awards: Performance units 489 — — — 489 Total share and incentive-based compensation expense 3,970 — — — 3,970 Less: Capitalized compensation expense (593) — — — (593) Share and incentive-based compensation expense, net $ 3,377 $ — $ — $ — $ 3,377 Nine Months Ended September 30, 2018 Equity-classified awards: Restricted stock awards $ 3,902 $ 8,140 $ 3,777 $ 5,181 $ 21,000 Performance share units 400 1,056 158 610 2,224 Total share-based compensation expense 4,302 9,196 3,935 5,791 23,224 Liability-classified awards: Performance units 776 2,151 558 1,309 4,794 Total share and incentive-based compensation expense 5,078 11,347 4,493 7,100 28,018 Less: Capitalized compensation expense (392) — — (555) (947) Share and incentive-based compensation expense, net $ 4,686 $ 11,347 $ 4,493 $ 6,545 $ 27,071 Nine Months Ended September 30, 2017 Equity-classified awards: Restricted stock awards $ 11,698 $ 1,825 $ — $ — $ 13,523 Performance share units 1,007 — — — 1,007 Total share-based compensation expense 12,705 1,825 — — 14,530 Liability-classified awards: Performance units 2,051 — — — 2,051 Total share and incentive-based compensation expense 14,756 1,825 — — 16,581 Less: Capitalized compensation expense (2,221) — — — (2,221) Share and incentive-based compensation expense, net $ 12,535 $ 1,825 $ — $ — $ 14,360 ____________________ 1. Recorded in general and administrative expense in the accompanying consolidated statements of operations. 2. Recorded in employee termination benefits in the accompanying consolidated statements of operations. 3. Recorded in accelerated vesting upon change in control in the accompanying consolidated statements of operations.

Subsequent Events

Subsequent Events	9 Months Ended
	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Divestiture of Permian Basin Properties. On November 1, 2018, the Company sold substantially all of its oil and natural gas properties, rights and related assets in the Central Basin Platform ("CBP") region of the Permian Basin, primarily located in Andrews County, TX, along with 13,125,000 common units representing a 25% equity interest in the SandRidge Permian Trust (the "Permian Trust"), to an independent third party for $14.5 million in cash, subject to certain remaining post-closing adjustments. The CBP assets and interest in the Permian Trust include 1,066 producing wells within the Permian Trust's area of mutual interest, certain wells not associated with the Permian Trust, a field office, and all equipment, inventory and yards associated with the Company's CBP operations. As a result of this divestiture, the Company will no longer have any obligations associated with the Permian Trust. This transaction did not result in a significant alteration of the relationship between the Company’s capitalized costs and proved reserves and, accordingly, the divestiture will be accounted for as an adjustment to the full cost pool with no gain or loss recognized on the sale.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	Nature of Business. SandRidge Energy, Inc. is an oil and natural gas exploration and production company headquartered in Oklahoma City, Oklahoma with its principal focus on developing high-return, growth-oriented projects in the U.S. Mid-Continent and North Park Basin of Colorado.
Principles of Consolidation	Principles of Consolidation. The consolidated financial statements include the accounts of the Company and its wholly owned or majority owned subsidiaries, including its proportionate share of the Royalty Trusts. All significant intercompany accounts and transactions have been eliminated in consolidation.
Interim Financial Statements	Interim Financial Statements. The accompanying unaudited condensed consolidated financial statements and notes have been derived from the Company's 2017 Form 10-K and should be read in conjunction with the audited financial statements and notes contained in the Company’s 2017 Form 10-K. Certain information and disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) have been condensed or omitted, although the Company believes that the disclosures contained herein are adequate to make the information presented not misleading. In the opinion of management, the financial statements include all adjustments, which consist of normal recurring adjustments unless otherwise disclosed, necessary to fairly state the Company’s unaudited condensed consolidated financial statements.
Significant Accounting Policies	Significant Accounting Policies. The unaudited condensed consolidated financial statements were prepared in accordance with the accounting policies stated in the 2017 Form 10-K as well as the items noted below.
Reclassifications	Reclassifications. Certain reclassifications have been made to the prior period financial statements to conform to the current period presentation. These reclassifications have no effect on the Company’s previously reported results of operations.
Use of Estimates	Use of Estimates. The preparation of the unaudited condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. The more significant areas requiring the use of assumptions, judgments and estimates include: oil, natural gas and natural gas liquids (“NGL”) reserves; impairment tests of long-lived assets; depreciation, depletion and amortization; income taxes; valuation of derivative instruments; contingencies; and accrued revenue and related receivables. Although management believes these estimates are reasonable, actual results could differ significantly.
Recent Accounting Pronouncements	Recent Accounting Pronouncements. The Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, “Revenue from Contracts with Customers (Topic 606),” which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers. Its objective is to increase the usefulness of information in the financial statements regarding the nature, timing and uncertainty of revenues. In August 2015, the FASB issued ASU 2015-14, "Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date," which deferred the effective date of ASU 2014-09 to January 1, 2018, for the Company. The ASU required adoption using either the retrospective transition method, which required restating previously reported results or the cumulative effect (modified retrospective) transition method, which utilized a cumulative-effect adjustment to retained earnings in the period of adoption to account for prior period effects rather than restating previously reported results. The Company adopted Topic 606 and all the related amendments (the “new revenue standard”) on January 1, 2018, using the modified retrospective transition method. See Note 2 for further discussion of the adoption of the new revenue standard. The FASB issued ASU 2016-16, “Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other than Inventory,” which removed the prohibition in Accounting Standards Codification (“ASC”) 740 against the immediate recognition of current and deferred income tax effects of intra-entity transfers of assets other than inventory. The amendments in this ASU were effective for the Company on January 1, 2018, with early adoption permitted on January 1, 2017. The ASU required application on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. The Company adopted the ASU on January 1, 2018. There was no impact to the Company’s consolidated financial statements and related disclosures upon adoption. The FASB issued ASU 2017-05, “Other Income - Gains and Losses from the Derecognition of Nonfinancial Assets (Subtopic: 610-20): Clarifying the Scope of Asset Derecognition Guidance and the Accounting for Partial Sales of Nonfinancial Assets,” which helps filers determine the guidance applicable for gain/loss recognition subsequent to the adoption of ASU 2014-09, Revenue from Contracts with Customers. The amendments also clarified that the derecognition of all businesses except those related to conveyances of oil and gas rights or contracts with customers should be accounted for in accordance with the derecognition and deconsolidation guidance in Topic 810, Consolidation. The Company adopted the ASU on January 1, 2018, using the modified retrospective transition method. Under this transition method the Company could have elected to apply this guidance retrospectively either to all contracts at the date of initial application or only to contracts that are not completed contracts at the date of initial application. The Company elected to evaluate only contracts that are not completed contracts. As there were no uncompleted contracts at January 1, 2018, there was no impact to the Company’s consolidated financial statements and related disclosures upon adoption. The FASB issued ASU 2018-13, "Fair Value Measurement (Topic 820) - Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement," which removes, modifies or adds disclosure requirements regarding fair value measurements. The amendments in this ASU are effective for all entities beginning after December 15, 2019, with amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty requiring prospective adoption and all other amendments requiring retrospective adoption. Early adoption is permitted and the Company elected to adopt this ASU during the third quarter of 2018, which resulted in a change to the Company's fair value measurement disclosures on a prospective basis, but had no impact on its consolidated financial statements. Recent Accounting Pronouncements Not Yet Adopted. The FASB issued ASU 2016-02, “Leases (Topic 842),” which requires lessees to recognize the assets and liabilities for the rights and obligations of all leases with a term greater than 12 months (long-term) on the balance sheet. Leases will be classified as financing or operating expenses, with the classification affecting the pattern and classification of expense recognition in the income statement. Leases to explore for or use oil and natural gas are not impacted by this guidance. In January 2018, the FASB issued ASU 2018-01, “Leases (Topic 842), Land Easement Practical Expedient for Transition to Topic 842.” This ASU permits an entity to continue to apply its current accounting policy for land easements that existed before the effective date of Topic 842. Once an entity adopts Topic 842, it would apply that Topic prospectively to all new (or modified) land easements to determine whether the arrangement contains a lease. ASU 2016-02 required adoption by application of a modified retrospective transition approach. In July 2018, the FASB issued ASU 2018-11, "Leases (Topic 842)." The amendments in this update provide another transition method whereby entities are allowed to initially apply the new lease standard at the adoption date and recognize a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The amendments further provide lessors with a practical expedient, by class of underlying asset, to not separate nonlease components from the associated lease component, similar to the expedient provided for lessees. The lessor practical expedient is limited to circumstances in which the nonlease component or components otherwise would be accounted for under the new revenue guidance and both (1) the timing and pattern of transfer are the same for the nonlease component(s) and associated lease component and (2) the lease component, if accounted for separately, would be classified as an operating lease. The amendments also clarify whether Topic 842 or Topic 606 applies for combined components. This topic is effective for the Company on January 1, 2019. Early adoption is permitted. Topic 842 provides a number of optional practical expedients in transition. The Company plans to elect the ‘package of practical expedients,’ which means the Company will not have to reassess under the new lease standard its prior conclusions about lease identification, lease classification and initial indirect costs. The Company also plans to elect the land easement practical expedient. The Company does not expect to elect the use-of-hindsight. Upon adoption, the Company anticipates recognizing assets and liabilities for the rights and obligations of its existing long-term operating leases on its consolidated balance sheets and utilizing new systems, processes and internal controls to properly identify, classify, measure and recognize new (or modified) leases after the date of adoption. While the effects of adoption are continuing to be assessed, the Company believes the primary impact of the lease standard relates to (1) recognizing assets and liabilities for the rights and obligations of the Company’s vehicle, drilling rig and equipment leases and, (2) providing new disclosures about the Company’s leasing activities. The Company will complete its evaluation during 2018 and will adopt Topic 842 on January 1, 2019. The Company expects to adopt this Topic using a modified retrospective approach by recognizing a cumulative-effect adjustment to the opening balance of retained earnings in the period of adoption. The new leasing standard also provides practical expedients for an entity’s ongoing accounting. The Company currently plans to elect the short-term lease recognition exemption for leases that qualify, which means the Company will not recognize assets and liabilities for the rights and obligations of qualifying leases, including existing short-term leases of those assets in
Revenue from Contract with Customer	Oil, natural gas and NGL revenues. A majority of the Company’s revenues come from sales of oil, natural gas and NGLs and are recorded at a point in time when control of the oil, natural gas and NGL production passes to the customer at the inlet of the processing plant or pipeline, or the delivery point for onloading to a delivery truck. As the Company’s customers obtain control of the production prior to selling it to other end customers, the Company presents its revenues on a net basis, rather than on a gross basis.

Revenues (Tables)

Revenues (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following table disaggregates the Company’s revenue by source for the three and nine-month periods ended September 30, 2018 and 2017: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Oil $ 63,994 $ 44,032 $ 166,548 $ 147,792 NGL 18,776 15,391 52,111 42,962 Natural gas 14,721 21,117 45,102 72,481 Other 169 352 489 858 Total revenues $ 97,660 $ 80,892 $ 264,250 $ 264,093

Employee Termination Benefits (

Employee Termination Benefits (Tables)	9 Months Ended
	Sep. 30, 2018
Postemployment Benefits [Abstract]
Schedule of Postemployment Benefits	The following table presents a summary of employee termination benefits for the three and nine-month periods ended September 30, 2018 and 2017 (in thousands): Cash Share-Based Compensation (4) Number of Shares Total Employee Termination Benefits Three Months Ended September 30, 2018 Executive Employee Termination Benefits $ — $ — — $ — Other Employee Termination Benefits 23 — — 23 $ 23 $ — — $ 23 Three Months Ended September 30, 2017 Executive Employee Termination Benefits $ — $ — — $ — Other Employee Termination Benefits — — — — $ — $ — — $ — Nine Months Ended September 30, 2018 Executive Employee Termination Benefits (1) $ 11,945 $ 9,196 554 $ 21,141 Other Employee Termination Benefits (2) 7,577 3,935 209 11,512 $ 19,522 $ 13,131 763 $ 32,653 Nine Months Ended September 30, 2017 Executive Employee Termination Benefits (3) $ 2,500 $ 1,825 96 $ 4,325 Other Employee Termination Benefits 490 — — 490 $ 2,990 $ 1,825 96 $ 4,815 ____________________ 1. On February 8, 2018, the Company’s then current CEO, James Bennett, separated employment from the Company, and on February 22, 2018, the Company’s then current CFO, Julian Bott, also separated employment from the Company. In accordance with the terms of their respective employment agreements, the Company incurred cash severance costs and share-based compensation costs associated with the accelerated vesting of awards during the first quarter of 2018. 2. As a result of a reduction in workforce in the first quarter of 2018, certain employees received termination benefits including cash severance and accelerated share-based and incentive compensation vesting upon separation of service from the Company. 3. Includes cash severance costs and share-based compensation costs associated with the accelerated vesting of awards related to the departure of the Company's former Executive Vice President of Investor Relations and Strategy, Duane Grubert. 4. Share-based compensation recognized in connection with the accelerated vesting of restricted stock awards and performance share units upon the departure of certain executives and the reduction in workforce in the first quarter of 2018 reflects the remaining unrecognized compensation expense associated with these awards at the date of termination. The unrecognized compensation expense was calculated using the grant date fair value for restricted stock awards and performance share units. One share of the Company’s common stock was issued per performance share unit.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured on Recurring Basis	The following tables summarize the Company’s assets and liabilities measured at fair value on a recurring basis by the fair value hierarchy (in thousands): September 30, 2018 Fair Value Measurements Netting(1) Assets/Liabilities at Fair Value Level 1 Level 2 Level 3 Assets Commodity derivative contracts $ — $ 224 $ — $ (151) $ 73 $ — $ 224 $ — $ (151) $ 73 Liabilities Commodity derivative contracts $ — $ 43,847 $ — $ (151) $ 43,696 $ — $ 43,847 $ — $ (151) $ 43,696 December 31, 2017 Fair Value Measurements Netting(1) Assets/Liabilities at Fair Value Level 1 Level 2 Level 3 Assets Commodity derivative contracts $ — $ 5,582 $ — $ (4,272) $ 1,310 Investments 5,072 — — — 5,072 $ 5,072 $ 5,582 $ — $ (4,272) $ 6,382 Liabilities Commodity derivative contracts $ — $ 18,467 $ — $ (4,272) $ 14,195 $ — $ 18,467 $ — $ (4,272) $ 14,195 ____________________ 1. Represents the effect of netting assets and liabilities for counterparties with which the right of offset exists.
Long-Term Debt Carrying Value and Fair Value Table	The estimated fair values and carrying values of the Company’s long-term debt are as follows (in thousands): September 30, 2018 December 31, 2017 Fair Value Carrying Value Fair Value Carrying Value Building Note $ — $ — $ 42,526 $ 37,502

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	9 Months Ended
	Sep. 30, 2018
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, plant and equipment consists of the following (in thousands): September 30, 2018 December 31, 2017 Oil and natural gas properties Proved $ 1,206,363 $ 1,056,806 Unproved 68,737 100,884 Total oil and natural gas properties 1,275,100 1,157,690 Less accumulated depreciation, depletion and impairment (546,769) (460,431) Net oil and natural gas properties capitalized costs 728,331 697,259 Land 4,500 4,500 Electrical infrastructure 131,010 131,010 Other non-oil and natural gas equipment 19,671 26,809 Buildings and structures 79,548 79,548 Total 234,729 241,867 Less accumulated depreciation and amortization (23,531) (15,886) Other property, plant and equipment, net 211,198 225,981 Total property, plant and equipment, net $ 939,529 $ 923,240

Accounts Payable and Accrued _2

Accounts Payable and Accrued Expenses (Tables)	9 Months Ended
	Sep. 30, 2018
Payables and Accruals [Abstract]
Accounts Payable and Accrued Expenses	Accounts payable and accrued expenses consist of the following (in thousands): September 30, 2018 December 31, 2017 Accounts payable and other accrued expenses $ 54,957 $ 75,191 Accrued interest 65 1,385 Revenues and royalties payable 42,075 37,274 Payroll and benefits 15,719 21,475 Drilling advances 164 3,830 Total accounts payable and accrued expenses $ 112,980 $ 139,155

Derivatives (Tables)

Derivatives (Tables)	9 Months Ended
	Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Offsetting Assets and Liabilities	The following tables summarize (i) the Company's commodity derivative contracts on a gross basis, (ii) the effects of netting assets and liabilities for which the right of offset exists based on master netting arrangements and (iii) for the Company’s net derivative liability positions, the applicable portion of shared collateral under the credit facility as of September 30, 2018, and December 31, 2017 (in thousands): September 30, 2018 Gross Amounts Gross Amounts Offset Amounts Net of Offset Financial Collateral Net Amount Assets Derivative contracts - current $ 224 $ (151) $ 73 $ — $ 73 Derivative contracts - noncurrent — — — — — Total $ 224 $ (151) $ 73 $ — $ 73 Liabilities Derivative contracts - current $ 37,056 $ (151) $ 36,905 $ (36,905) $ — Derivative contracts - noncurrent 6,791 — 6,791 (6,791) — Total $ 43,847 $ (151) $ 43,696 $ (43,696) $ — December 31, 2017 Gross Amounts Gross Amounts Offset Amounts Net of Offset Financial Collateral Net Amount Assets Derivative contracts - current $ 5,582 $ (4,272) $ 1,310 $ — $ 1,310 Derivative contracts - noncurrent — — — — — Total $ 5,582 $ (4,272) $ 1,310 $ — $ 1,310 Liabilities Derivative contracts - current $ 14,899 $ (4,272) $ 10,627 $ (10,627) $ — Derivative contracts - noncurrent 3,568 — 3,568 (3,568) — Total $ 18,467 $ (4,272) $ 14,195 $ (14,195) $ —
Open Oil and Natural Gas Commodity Derivative Contracts	At September 30, 2018, the Company’s open commodity derivative contracts consisted of the following: Oil Price Swaps Notional (MBbls) Weighted Average Fixed Price October 2018 - December 2018 828 $ 56.12 January 2019 - December 2019 1,825 $ 54.29 Natural Gas Price Swaps Notional (MMcf) Weighted Average Fixed Price October 2018 - December 2018 3,680 $ 3.11
Fair Value of Derivatives	The following table presents the fair value of the Company’s derivative contracts as of September 30, 2018, and December 31, 2017, on a gross basis without regard to same-counterparty netting (in thousands): Type of Contract Balance Sheet Classification September 30, 2018 December 31, 2017 Derivative assets Natural gas price swaps Derivative contracts-current $ 224 $ 5,582 Derivative liabilities Oil price swaps Derivative contracts-current (37,056) (14,899) Oil price swaps Derivative contracts-noncurrent (6,791) (3,568) Total net derivative contracts $ (43,623) $ (12,885)

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Provision for Income Taxes	The provision for income taxes consisted of the following components (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Current Federal $ (33) $ (8,460) $ (33) $ (8,460) State 3 3 (39) (36) Total provision $ (30) $ (8,457) $ (72) $ (8,496)

Earnings (Loss) per Share (Tabl

Earnings (Loss) per Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Calculation of Weighted Average Common Shares Outstanding Used in Computation of Diluted (Loss) Earnings Per Share	The following table summarizes the calculation of weighted average common shares outstanding used in the computation of diluted earnings (loss) per share: Net Income (Loss) Weighted Average Shares Earnings (Loss) Per Share (In thousands, except per share amounts) Three Months Ended September 30, 2018 Basic earnings per share $ 11,715 35,308 $ 0.33 Effect of dilutive securities Restricted stock awards — 22 Performance share units(1) — — Warrants(2) — — Diluted earnings per share $ 11,715 35,330 $ 0.33 Three Months Ended September 30, 2017 Basic loss per share $ (8,485) 34,290 $ (0.25) Effect of dilutive securities Restricted stock awards(3) — — Performance share units(3) — — Warrants(2) — — Diluted loss per share $ (8,485) 34,290 $ (0.25) Nine Months Ended September 30, 2018 Basic loss per share $ (63,253) 34,971 $ (1.81) Effect of dilutive securities Restricted stock awards(4) — — Performance share units(1) — — Warrants(2) — — Diluted loss per share $ (63,253) 34,971 $ (1.81) Nine Months Ended September 30, 2017 Basic earnings per share $ 65,822 31,750 $ 2.07 Effect of dilutive securities Restricted stock awards — 234 Performance share units(1) — — Warrants(2) — — Diluted earnings per share $ 65,822 31,984 $ 2.06 ____________________ 1. No incremental shares of potentially dilutive performance share units were included for the three-month period ended September 30, 2018, or the nine-month periods ended September 30, 2018, or 2017, as their effect was antidilutive under the treasury stock method. 2. No incremental shares of potentially dilutive warrants were included for the three and nine-month periods ended September 30, 2018, or 2017, as their effect was antidilutive. 3. Restricted stock awards covering 0.1 million shares and performance share units covering an insignificant amount of shares for the three-month period ended September 30, 2017, were excluded from the computation of loss per share because their effect would have been antidilutive. 4. No incremental shares of potentially dilutive restricted stock awards were included for the nine-month period ended September 30, 2018, as their effect was antidilutive under the treasury stock method.

Share and Incentive-Based Com_2

Share and Incentive-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Unvested Restricted Stock Awards	The following table presents a summary of the Company’s unvested restricted stock awards: Number of Shares Weighted Average Grant Date Fair Value (In thousands) Unvested restricted shares outstanding at December 31, 2017 1,105 $ 22.62 Granted 366 $ 16.06 Vested (1,049) $ 22.71 Forfeited / Canceled (39) $ 21.61 Unvested restricted shares outstanding at September 30, 2018 383 $ 16.22
Schedule of Unvested Performance Share Units Activity	The following table presents a summary of the Company’s performance share units: Number of Units Fair Value per Unit at September 30, 2018 (In thousands) Unvested performance share units outstanding at December 31, 2017 183 Granted 111 Vested (177) Forfeited / Canceled (6) Unvested performance share units outstanding at September 30, 2018 111 $ 20.41
Schedule of Unvested Incentive-based Performance Unit Activity	The following table presents a summary of the Company’s performance units: Number of Units Fair Value per Unit at September 30, 2018 (In thousands) Unvested performance units outstanding at December 31, 2017 49 Granted — Vested (48) Forfeited / Canceled (1) Unvested performance units outstanding at September 30, 2018 — —
Schedule of Employee Service Share and Incentive-based Compensation	The following tables summarize share and incentive-based compensation for the three and nine-month periods ended September 30, 2018, and 2017 (in thousands): Recurring Compensation Expense(1) Executive Terminations(2) Reduction in Force(2) Change in Control(3) Total Three Months Ended September 30, 2018 Equity-classified awards: Restricted stock awards $ 523 $ — $ — $ — $ 523 Performance share units 41 — — — 41 Total share-based compensation expense 564 — — — 564 Less: Capitalized compensation expense (58) — — — (58) Share-based compensation expense, net $ 506 $ — $ — $ — $ 506 Three Months Ended September 30, 2017 Equity-classified awards: Restricted stock awards $ 3,084 $ — $ — $ — $ 3,084 Performance share units 397 — — — 397 Total share-based compensation expense 3,481 — — — 3,481 Liability-classified awards: Performance units 489 — — — 489 Total share and incentive-based compensation expense 3,970 — — — 3,970 Less: Capitalized compensation expense (593) — — — (593) Share and incentive-based compensation expense, net $ 3,377 $ — $ — $ — $ 3,377 Nine Months Ended September 30, 2018 Equity-classified awards: Restricted stock awards $ 3,902 $ 8,140 $ 3,777 $ 5,181 $ 21,000 Performance share units 400 1,056 158 610 2,224 Total share-based compensation expense 4,302 9,196 3,935 5,791 23,224 Liability-classified awards: Performance units 776 2,151 558 1,309 4,794 Total share and incentive-based compensation expense 5,078 11,347 4,493 7,100 28,018 Less: Capitalized compensation expense (392) — — (555) (947) Share and incentive-based compensation expense, net $ 4,686 $ 11,347 $ 4,493 $ 6,545 $ 27,071 Nine Months Ended September 30, 2017 Equity-classified awards: Restricted stock awards $ 11,698 $ 1,825 $ — $ — $ 13,523 Performance share units 1,007 — — — 1,007 Total share-based compensation expense 12,705 1,825 — — 14,530 Liability-classified awards: Performance units 2,051 — — — 2,051 Total share and incentive-based compensation expense 14,756 1,825 — — 16,581 Less: Capitalized compensation expense (2,221) — — — (2,221) Share and incentive-based compensation expense, net $ 12,535 $ 1,825 $ — $ — $ 14,360 ____________________ 1. Recorded in general and administrative expense in the accompanying consolidated statements of operations. 2. Recorded in employee termination benefits in the accompanying consolidated statements of operations. 3. Recorded in accelerated vesting upon change in control in the accompanying consolidated statements of operations.

Revenues - Disaggregation of Re

Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue
Revenues	$ 97,660	$ 80,892	$ 264,250	$ 264,093
Oil
Disaggregation of Revenue
Revenues	63,994	44,032	166,548	147,792
NGL
Disaggregation of Revenue
Revenues	18,776	15,391	52,111	42,962
Natural gas
Disaggregation of Revenue
Revenues	14,721	21,117	45,102	72,481
Other
Disaggregation of Revenue
Revenues	$ 169	$ 352	$ 489	$ 858

Revenues - Narrative (Details)

Revenues - Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Revenue Receivable from Contract With Customers
Revenues Receivable from Customer
Revenues receivable	$ 33.7	$ 34.6

Proxy Contest (Details)

Proxy Contest (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Jun. 30, 2018director
Other Income and Expenses [Abstract]
Number of directors nominated by shareholder					5
Number of directors on board					8
Proxy contest | $	$ (459)	$ 0	$ 7,139	$ 0

Employee Termination Benefits_2

Employee Termination Benefits (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Employee Termination Benefits
Cash	$ 23	$ 0	$ 19,522	$ 2,990
Share-Based Compensation	$ 0	$ 0	$ 13,131	$ 1,825
Number of Shares	0	0	763	96
Total Employee Termination Benefits	$ 23	$ 0	$ 32,653	$ 4,815
Executive Employee Termination Benefits
Employee Termination Benefits
Cash	0	0	11,945	2,500
Share-Based Compensation	$ 0	$ 0	$ 9,196	$ 1,825
Number of Shares	0	0	554	96
Total Employee Termination Benefits	$ 0	$ 0	$ 21,141	$ 4,325
Other Employee Termination Benefits
Employee Termination Benefits
Cash	23	0	7,577	490
Share-Based Compensation	$ 0	$ 0	$ 3,935	$ 0
Number of Shares	0	0	209	0
Total Employee Termination Benefits	$ 23	$ 0	$ 11,512	$ 490

Acquisitions and Divestitures (

Acquisitions and Divestitures (Details) a in Thousands, $ in Thousands	1 Months Ended	9 Months Ended
	Feb. 28, 2017USD ($)awell	Sep. 30, 2017USD ($)
Costs Incurred, Acquisition of Oil and Gas Properties [Abstract]
Area of land acquired | a	13
Payments to acquire land	$ 47,800
Number of wells in which a working interest was acquired | well	4
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal		$ 0
Disposal Group, Not Discontinued Operations | Oil and Gas Properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups
Proceeds from sale of properties		$ 16,000

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($)	Dec. 31, 2017	Feb. 10, 2017	Oct. 04, 2016
New Building Note | Secured Notes
Fair Value, Assets and Liabilities Measured on Recurring Basis
Face amount of debt instrument		$ 35,000,000	$ 35,000,000
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair value of investments	$ 5,072,000
Fair Value, Measurements, Recurring | Fair Value Measurements Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair value of investments	5,072,000
Fair Value, Measurements, Recurring | Fair Value Measurements Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair value of investments	$ 0

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative assets	$ 224	$ 5,582
Derivative liabilities	43,847	18,467
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments		5,072
Netting adjustments, assets	(151)	(4,272)
Assets at fair value	73	6,382
Netting adjustments, liabilities	(151)	(4,272)
Liabilities at fair value	43,696	14,195
Fair Value, Measurements, Recurring | Commodity derivative contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis
Netting adjustments, assets	(151)	(4,272)
Assets at fair value	73	1,310
Netting adjustments, liabilities	(151)	(4,272)
Liabilities at fair value	43,696	14,195
Fair Value, Measurements, Recurring | Fair Value Measurements Level 1
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments		5,072
Derivative assets	0	5,072
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Level 1 | Commodity derivative contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments		0
Derivative assets	224	5,582
Derivative liabilities	43,847	18,467
Fair Value, Measurements, Recurring | Fair Value Measurements Level 2 | Commodity derivative contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative assets	224	5,582
Derivative liabilities	43,847	18,467
Fair Value, Measurements, Recurring | Fair Value Measurements Level 3
Fair Value, Assets and Liabilities Measured on Recurring Basis
Investments		0
Derivative assets	0	0
Derivative liabilities	0	0
Fair Value, Measurements, Recurring | Fair Value Measurements Level 3 | Commodity derivative contracts
Fair Value, Assets and Liabilities Measured on Recurring Basis
Derivative assets	0	0
Derivative liabilities	$ 0	$ 0

Fair Value Measurements - Estim

Fair Value Measurements - Estimated Fair Value and Carrying Value of Long-Term Debt (Details) - Secured Notes - New Building Note - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Oct. 04, 2016
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair Value			$ 36,600
Carrying value	$ 0	$ 37,502
Fair Value Measurements Level 2
Fair Value, Assets and Liabilities Measured on Recurring Basis
Fair Value	$ 0	$ 42,526

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Oil and natural gas properties
Proved	$ 1,206,363	$ 1,056,806
Unproved	68,737	100,884
Total oil and natural gas properties	1,275,100	1,157,690
Less: accumulated depreciation, depletion and impairment	(546,769)	(460,431)
Net oil and natural gas properties capitalized costs	728,331	697,259
Property, Plant and Equipment, Net
Property, plant and equipment, gross	234,729	241,867
Less accumulated depreciation and amortization	(23,531)	(15,886)
Other property, plant and equipment, net	211,198	225,981
Total property, plant and equipment, net	939,529	923,240
Land
Property, Plant and Equipment, Net
Property, plant and equipment, gross	4,500	4,500
Electrical infrastructure
Property, Plant and Equipment, Net
Property, plant and equipment, gross	131,010	131,010
Other non-oil and natural gas equipment
Property, Plant and Equipment, Net
Property, plant and equipment, gross	19,671	26,809
Buildings and structures
Property, Plant and Equipment, Net
Property, plant and equipment, gross	$ 79,548	$ 79,548

Property, Plant and Equipment_2

Property, Plant and Equipment - Narrative (Details) - USD ($)	3 Months Ended	9 Months Ended
	Jun. 30, 2018	Sep. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment
Assets held-for-sale				$ 10,600,000
Property Located in Oklahoma City, OK
Property, Plant and Equipment
Assets held-for-sale				$ 9,300,000
Proceeds from Sale of Property Held-for-sale	$ 10,400,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges		$ 1,100,000
Midstream Generator Assets
Property, Plant and Equipment
Assets held-for-sale			$ 5,700,000
Gain (Loss) on Sale of Assets and Asset Impairment Charges	$ 0
Net realizable value of assets held for sale			$ 1,600,000
Impairment of assets to be disposed of		$ 4,100,000

Accounts Payable and Accrued _3

Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Payables and Accruals [Abstract]
Accounts payable and other accrued expenses	$ 54,957	$ 75,191
Accrued interest	65	1,385
Revenues and royalties payable	42,075	37,274
Payroll and benefits	15,719	21,475
Drilling advances	164	3,830
Total accounts payable and accrued expenses	$ 112,980	$ 139,155

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Details) - USD ($)

Feb. 10, 2017

Oct. 04, 2016

Sep. 30, 2018

Sep. 30, 2017

May 11, 2017

Sep. 30, 2018

Sep. 30, 2017

Oct. 03, 2019

Oct. 31, 2018

Oct. 03, 2018

Dec. 31, 2017

Oct. 03, 2017

Debt Instrument

Gain on extinguishment of debt

$ 0

$ 0

$ 1,151,000

$ 0

Revolving Credit Facility | First Lien Exit Facility

Debt Instrument

Maximum borrowing capacity

$ 425,000,000

Cash collateral released

$ 50,000,000

Revolving Credit Facility | Credit Facility

Debt Instrument

Maximum borrowing capacity

600,000,000

Borrowing base

$ 425,000,000

Commitment fee

0.50%

Percentage of proved reserves pledged as collateral

95.00%

Total net leverage ratio (no greater than)

3.50

Interest coverage ratio (no less than)

2.25

Aggregate principal amount of default trigger

$ 25,000,000

Default trigger related to judgment liability

$ 25,000,000

Debt outstanding

0

0

Outstanding letters of credit

6,200,000

6,200,000

Revolving Credit Facility | Credit Facility | Base Rate | Minimum

Debt Instrument

Basis spread on variable rate

2.00%

Revolving Credit Facility | Credit Facility | Base Rate | Maximum

Debt Instrument

Basis spread on variable rate

3.00%

Revolving Credit Facility | Credit Facility | LIBOR | Minimum

Debt Instrument

Basis spread on variable rate

3.00%

Revolving Credit Facility | Credit Facility | LIBOR | Maximum

Debt Instrument

Basis spread on variable rate

4.00%

Secured Notes | New Building Note

Debt Instrument

Debt outstanding

$ 0

0

$ 37,502,000

Face amount of debt instrument

$ 35,000,000

35,000,000

Annual interest rate

6.00%

Interest paid-in-kind term

90 days

Interest costs paid-in-kind

$ 1,300,000

Fair Value

36,600,000

Gain on extinguishment of debt

$ 1,200,000

Unsecured Debt | Pre-bankruptcy Unsecured Debt

Debt Instrument

Proceeds remitted to unsecured creditors

$ 26,800,000

Forecast | Secured Notes | New Building Note

Debt Instrument

Annual interest rate

10.00%

8.00%

Subsequent Event | Revolving Credit Facility | Credit Facility

Debt Instrument

Borrowing base

$ 350,000,000

Derivatives - Narrative (Detail

Derivatives - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)institution	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)institution	Sep. 30, 2017USD ($)
Derivative Instruments and Hedging Activities Disclosure
Loss (gain) on derivative contracts	$ 11,329	$ 11,702	$ 59,763	$ (46,024)
Cash payments, upon settlement of derivative contract			$ 29,025	(7,700)
Number of counterparties to open derivative contracts | institution	5		5
Commodity Derivatives
Derivative Instruments and Hedging Activities Disclosure
Loss (gain) on derivative contracts	$ 11,300	11,700	$ 59,800	(46,000)
Cash payments, upon settlement of derivative contract	$ 11,600	$ (5,000)	$ 29,000	$ (7,700)

Derivatives - Offsetting Assets

Derivatives - Offsetting Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets
Derivative assets, gross amounts	$ 224	$ 5,582
Derivative assets, gross amounts offset	(151)	(4,272)
Derivative assets, amounts net of offset	73	1,310
Financial collateral (obligation to return cash)	0	0
Derivative assets, net amount	73	1,310
Liabilities
Derivative liabilities, gross amounts	43,847	18,467
Derivative liabilities, gross amounts offset	(151)	(4,272)
Derivative liabilities, amounts net of offset	43,696	14,195
Financial collateral (right to reclaim cash)	(43,696)	(14,195)
Derivative liabilities, net amount	0	0
Current assets
Assets
Derivative assets, gross amounts	224	5,582
Derivative assets, gross amounts offset	(151)	(4,272)
Derivative assets, amounts net of offset	73	1,310
Financial collateral (obligation to return cash)	0	0
Derivative assets, net amount	73	1,310
Noncurrent assets
Assets
Derivative assets, gross amounts	0	0
Derivative assets, gross amounts offset	0	0
Derivative assets, amounts net of offset	0	0
Financial collateral (obligation to return cash)	0	0
Derivative assets, net amount	0	0
Current liabilities
Liabilities
Derivative liabilities, gross amounts	37,056	14,899
Derivative liabilities, gross amounts offset	(151)	(4,272)
Derivative liabilities, amounts net of offset	36,905	10,627
Financial collateral (right to reclaim cash)	(36,905)	(10,627)
Derivative liabilities, net amount	0	0
Noncurrent liabilities
Liabilities
Derivative liabilities, gross amounts	6,791	3,568
Derivative liabilities, gross amounts offset	0	0
Derivative liabilities, amounts net of offset	6,791	3,568
Financial collateral (right to reclaim cash)	(6,791)	(3,568)
Derivative liabilities, net amount	$ 0	$ 0

Derivatives - Open Commodity De

Derivatives - Open Commodity Derivative Contracts (Details)	9 Months Ended
	Sep. 30, 2018$ / bbl$ / McfMBblsMMcf
Oil Price Swaps, October 2018 - December 2018
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) | MBbls	828
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / bbl	56.12
Oil Price Swaps, January 2019 - December 2019
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) | MBbls	1,825
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / bbl	54.29
Natural Gas Price Swaps, October 2018 - December 2018
Derivative Instruments and Hedging Activities Disclosure
Notional (Oil in MBbls/Natural Gas in MMcf) | MMcf	3,680
Weighted Avg. Fixed Price (Oil in USD/bbl, Natural Gas in USD/mcf) | $ / Mcf	3.11

Derivatives - Fair Value of Der

Derivatives - Fair Value of Derivative Contracts (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value
Derivative assets	$ 224	$ 5,582
Derivative liabilities	(43,847)	(18,467)
Total net derivative contracts	(43,623)	(12,885)
Current assets
Derivatives, Fair Value
Derivative assets	224	5,582
Current liabilities
Derivatives, Fair Value
Derivative liabilities	(37,056)	(14,899)
Noncurrent liabilities
Derivatives, Fair Value
Derivative liabilities	(6,791)	(3,568)
Oil price swaps | Current liabilities
Derivatives, Fair Value
Derivative liabilities	(37,056)	(14,899)
Oil price swaps | Noncurrent liabilities
Derivatives, Fair Value
Derivative liabilities	(6,791)	(3,568)
Natural gas price swaps | Current assets
Derivatives, Fair Value
Derivative assets	$ 224	$ 5,582

Equity - Narrative (Details)

Equity - Narrative (Details) - $ / shares	24 Months Ended
	Sep. 30, 2018	Dec. 31, 2017	Oct. 01, 2016
Class of Stock
Common stock, shares issued	35,691,000	35,650,000
Common stock, shares outstanding	35,691,000	35,650,000
Unvested awards	400,000
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	250,000,000	250,000,000
Series A Warrants
Class of Stock
Plan of Reorganization, Equity Interest Issuable, Number of Shares	4,600,000
Number of common shares exercised for each warrant			1
Exercise price (in usd per share)			$ 41.34
Series B Warrants
Class of Stock
Plan of Reorganization, Equity Interest Issuable, Number of Shares	2,000,000
Number of common shares exercised for each warrant			1
Exercise price (in usd per share)			$ 42.03
Restricted Stock
Class of Stock
Unvested awards	383,000	1,105,000

Income Taxes - Provision for In

Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Current
Federal	$ (33)	$ (8,460)	$ (33)	$ (8,460)
State	3	3	(39)	(36)
Total provision	$ (30)	$ (8,457)	$ (72)	$ (8,496)

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Billions	9 Months Ended
	Sep. 30, 2018	Oct. 04, 2016
Income Taxes
Operating loss carryforwards expected to expire	$ 1.6
Minimum
Income Taxes
Number of tax years open for state tax audit (in years)	3 years
Maximum
Income Taxes
Number of tax years open for state tax audit (in years)	5 years
Earliest Tax Year
Income Taxes
Open tax year	2,005
Latest Tax Year
Income Taxes
Open tax year	2,014
Domestic Tax Authority
Income Taxes
Operating loss carryforwards subject to limitation		$ 1.9
Domestic Tax Authority | Earliest Tax Year
Income Taxes
Open tax year	2,015

Earnings (Loss) per Share (Deta

Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings (Loss) Per Share, Diluted, by Common Class, Including Two Class Method
Basic earnings (loss)	$ 11,715	$ (8,485)	$ (63,253)	$ 65,822
Weighted Average Shares, Basic	35,308,000	34,290,000	34,971,000	31,750,000
Basic earnings (loss) (in dollars per share)	$ 0.33	$ (0.25)	$ (1.81)	$ 2.07
Effect of dilutive securities
Restricted stock awards	$ 0	$ 0	$ 0	$ 0
Restricted stock awards (in shares)	22,000	0	0	234,000
Performance share units	$ 0	$ 0	$ 0	$ 0
Performance share units (in shares)	0	0	0	0
Warrants	$ 0	$ 0	$ 0	$ 0
Warrants (shares)	0	0	0	0
Diluted earnings (loss)	$ 11,715	$ (8,485)	$ (63,253)	$ 65,822
Weighted average shares, diluted	35,330,000	34,290,000	34,971,000	31,984,000
Diluted earnings (loss) per share (in dollars per share)	$ 0.33	$ (0.25)	$ (1.81)	$ 2.06
Performance Share Units
Potentially Dilutive Securities
Antidilutive securities excluded from computation of earnings per share (in shares)	0		0	0
Warrants
Potentially Dilutive Securities
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0	0
Restricted Stock awards
Potentially Dilutive Securities
Antidilutive securities excluded from computation of earnings per share (in shares)		100,000	0

Share and Incentive-Based Com_3

Share and Incentive-Based Compensation - Awards Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Number of Shares/Units
Unvested shares/units outstanding at end of period	400
Number of Units
Unvested performance units outstanding at December 31, 2017	49
Granted (units)	0
Vested (units)	(48)
Forfeited / Canceled (units)	(1)
Unvested performance units outstanding at September 30, 2018	0
Fair Value per Unit at September 30, 2018
Employee Incentive Plan, Performance Units, Fair Value | $ / shares	$ 0
Restricted Stock
Number of Shares/Units
Unvested shares/units outstanding at beginning of period	1,105
Granted (in shares/units)	366
Vested (in shares/units)	(1,049)
Forfeited / Canceled (in shares/units)	(39)
Unvested shares/units outstanding at end of period	383
Fair Value (usd per share/unit)
Unvested shares/units outstanding at beginning of period (in usd per share/unit) | $ / shares	$ 22.62
Granted (in usd per share/unit) | $ / shares	16.06
Vested (in usd per share/unit) | $ / shares	22.71
Forfeited / Canceled (in usd per share/unit) | $ / shares	21.61
Unvested shares/units outstanding at end of period (in usd per share/unit) | $ / shares	$ 16.22
Performance Share Units
Number of Shares/Units
Unvested shares/units outstanding at beginning of period	183
Granted (in shares/units)	111
Vested (in shares/units)	(177)
Forfeited / Canceled (in shares/units)	(6)
Unvested shares/units outstanding at end of period	111
Fair Value (usd per share/unit)
Unvested shares/units outstanding at end of period (in usd per share/unit) | $ / shares	$ 20.41

Share and Incentive-Based Com_4

Share and Incentive-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	6 Months Ended	9 Months Ended
	Oct. 31, 2016	Jun. 30, 2018	Sep. 30, 2018	Oct. 01, 2016
Share and Incentive Based Compensation Arrangement
Shares authorized for issuance				4,600,000
Performance units weighted average grant date fair value	$ 100
Performance units weighted average grant date fair value aggregate intrinsic value			$ 4.8
Restricted Stock
Share and Incentive Based Compensation Arrangement
Compensation yet not yet recognized			$ 5.6
Compensation yet not yet recognized period			2 years 4 months 24 days
Aggregate intrinsic value of vested awards			$ 15.9
Restricted Stock | Minimum
Share and Incentive Based Compensation Arrangement
Vesting period			1 year
Restricted Stock | Maximum
Share and Incentive Based Compensation Arrangement
Vesting period		3 years
Performance Share Units
Share and Incentive Based Compensation Arrangement
Aggregate intrinsic value of vested awards			$ 2.7

Share and Incentive-Based Com_5

Share and Incentive-Based Compensation - Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	$ 564	$ 3,481	$ 23,224	$ 14,530
Liability-classified awards compensation expense, Performance units		489	4,794	2,051
Total share and incentive-based compensation expense		3,970	28,018	16,581
Less: Capitalized compensation expense	(58)	(593)	(947)	(2,221)
Share and incentive-based compensation expense, net	506	3,377	27,071	14,360
Recurring Compensation Expense
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	564	3,481	4,302	12,705
Liability-classified awards compensation expense, Performance units		489	776	2,051
Total share and incentive-based compensation expense		3,970	5,078	14,756
Less: Capitalized compensation expense	(58)	(593)	(392)	(2,221)
Share and incentive-based compensation expense, net	506	3,377	4,686	12,535
Executive Terminations
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	9,196	1,825
Liability-classified awards compensation expense, Performance units		0	2,151	0
Total share and incentive-based compensation expense		0	11,347	1,825
Less: Capitalized compensation expense	0	0	0	0
Share and incentive-based compensation expense, net	0	0	11,347	1,825
Reduction in Force
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	3,935	0
Liability-classified awards compensation expense, Performance units		0	558	0
Total share and incentive-based compensation expense		0	4,493	0
Less: Capitalized compensation expense	0	0	0	0
Share and incentive-based compensation expense, net	0	0	4,493	0
Change In Control
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	5,791	0
Liability-classified awards compensation expense, Performance units		0	1,309	0
Total share and incentive-based compensation expense		0	7,100	0
Less: Capitalized compensation expense	0	0	(555)	0
Share and incentive-based compensation expense, net	0	0	6,545	0
Restricted Stock
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	523	3,084	21,000	13,523
Restricted Stock | Recurring Compensation Expense
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	523	3,084	3,902	11,698
Restricted Stock | Executive Terminations
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	8,140	1,825
Restricted Stock | Reduction in Force
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	3,777	0
Restricted Stock | Change In Control
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	5,181	0
Performance Share Units
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	41	397	2,224	1,007
Performance Share Units | Recurring Compensation Expense
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	41	397	400	1,007
Performance Share Units | Executive Terminations
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	1,056	0
Performance Share Units | Reduction in Force
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	0	0	158	0
Performance Share Units | Change In Control
Share and Incentive-Based Compensation Arrangement by Award, Compensation Cost
Equity-classified awards compensation expense	$ 0	$ 0	$ 610	$ 0

Subsequent Events (Details)

Subsequent Events (Details) a in Thousands, $ in Thousands	Nov. 02, 2018USD ($)awell	Nov. 01, 2018USD ($)wellshares	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Feb. 28, 2017well
Subsequent Events
Acquisition price			$ 0	$ 48,236
Number of wells in which a working interest was acquired | well					4
Oil and Gas Properties | Disposal Group, Not Discontinued Operations
Subsequent Events
Proceeds from sale of properties				$ 16,000
Subsequent Event | Oil and Gas Properties | Disposal Group, Not Discontinued Operations | Permian Basin
Subsequent Events
Number of units sold | shares		13,125,000
Ownership interest sold		25.00%
Proceeds from sale of properties		$ 14,500
Number of wells sold | well		1,066
Subsequent Event | Mississippian Lime and NW STACK areas of Oklahoma and Kansas
Subsequent Events
Acquisition price	$ 25,100
Number of wells in which a working interest was acquired | well	1,962
Percentage of acquired wells operated by company	80.00%
Subsequent Event | Mississippian Lime and NW STACK areas of Oklahoma and Kansas | Mid-continent
Subsequent Events
Working interest acquired	13.20%
Gross number of acres acquired | a	410
Net number of acres acquired | a	54
Subsequent Event | Mississippian Lime and NW STACK areas of Oklahoma and Kansas | Mississippian Lime
Subsequent Events
Working interest acquired	13.20%