Chord Energy (CHRD) 10-Q 9 Aug 19 2019 Q2 Quarterly report Financial data

Cover Page

Cover Page - shares	6 Months Ended
	Jun. 30, 2019	Jul. 31, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	1-34776
Entity Registrant Name	Oasis Petroleum Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	80-0554627
Entity Address, Address Line One	1001 Fannin Street, Suite 1500
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	281
Local Phone Number	404-9500
Title of 12(b) Security	Common Stock
Trading Symbol	OAS
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		321,871,437
Document Fiscal Year Focus	2019
Amendment Flag	false
Document Fiscal Period Focus	Q2
Entity Central Index Key	0001486159
Current Fiscal Year End Date	--12-31

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 20,258	$ 22,190
Accounts receivable, net	396,104	387,602
Inventory	30,056	33,128
Prepaid expenses	6,018	10,997
Derivative instruments	19,089	99,930
Intangible assets, net	0	125
Other current assets	195	183
Total current assets	471,720	554,155
Property, plant and equipment
Oil and gas properties (successful efforts method)	9,283,462	8,912,189
Other property and equipment	1,301,835	1,151,772
Less: accumulated depreciation, depletion, amortization and impairment	(3,416,183)	(3,036,852)
Total property, plant and equipment, net	7,169,114	7,027,109
Derivative instruments	5,636	6,945
Long-term inventory	13,286	12,260
Operating right-of-use assets	20,054
Other assets	30,478	25,673
Total assets	7,710,288	7,626,142
Current liabilities
Accounts payable	15,155	20,166
Revenues and production taxes payable	170,534	216,695
Accrued liabilities	315,450	331,651
Accrued interest payable	37,701	38,040
Derivative instruments	4,445	84
Advances from joint interest partners	4,076	5,140
Current operating lease liabilities	7,837
Other current liabilities	3,230	0
Total current liabilities	558,428	611,776
Long-term debt	2,896,524	2,735,276
Deferred income taxes	308,672	300,055
Asset retirement obligations	55,228	52,384
Derivative instruments	0	20
Operating lease liabilities	18,021
Other liabilities	6,957	7,751
Total liabilities	3,843,830	3,707,262
Commitments and contingencies
Stockholders’ equity
Common stock, $0.01 par value: 900,000,000 shares authorized; 324,680,450 shares issued and 321,894,286 shares outstanding at June 30, 2019 and 320,469,049 shares issued and 318,377,161 shares outstanding at December 31, 2018	3,183	3,157
Treasury stock, at cost: 2,786,164 and 2,091,888 shares at June 30, 2019 and December 31, 2018, respectively	(33,330)	(29,025)
Additional paid-in capital	3,096,355	3,077,755
Retained earnings	610,564	682,689
Oasis share of stockholders’ equity	3,676,772	3,734,576
Non-controlling interests	189,686	184,304
Total stockholders’ equity	3,866,458	3,918,880
Total liabilities and stockholders’ equity	$ 7,710,288	$ 7,626,142

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	900,000,000	900,000,000
Common stock, shares issued (in shares)	324,680,450	320,469,049
Common stock, shares outstanding (in shares)	321,894,286	318,377,161
Treasury stock, shares (in shares)	2,786,164	2,091,888

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Total revenues	$ 529,405	$ 573,751	$ 1,105,137	$ 1,047,563
Operating expenses
Lease operating expenses	56,228	44,141	114,672	88,922
Marketing, transportation and gathering expenses	28,488	22,833	63,438	43,846
Production taxes	28,142	34,026	57,760	65,026
Depreciation, depletion and amortization	177,358	153,570	367,191	302,835
Exploration expenses	887	617	1,717	1,386
Impairment	24	384,135	653	384,228
General and administrative expenses	30,926	28,230	65,385	56,170
Total operating expenses	457,557	818,379	979,923	1,179,206
Gain (loss) on sale of properties	(276)	1,954	(3,198)	1,954
Operating income (loss)	71,572	(242,674)	122,016	(129,689)
Other income (expense)
Net gain (loss) on derivative instruments	34,749	(120,285)	(82,862)	(191,401)
Interest expense, net of capitalized interest	(43,186)	(40,910)	(87,654)	(78,056)
Loss on extinguishment of debt	0	(13,651)	0	(13,651)
Other income	279	218	233	35
Total other expense, net	(8,158)	(174,628)	(170,283)	(283,073)
Income (loss) before income taxes	63,414	(417,302)	(48,267)	(412,762)
Income tax benefit (expense)	(12,240)	101,001	(8,537)	100,173
Net income (loss) including non-controlling interests	51,174	(316,301)	(56,804)	(312,589)
Less: Net income attributable to non-controlling interests	8,417	3,903	15,321	7,025
Net income (loss) attributable to Oasis	$ 42,757	$ (320,204)	$ (72,125)	$ (319,614)
Earnings (loss) attributable to Oasis per share:
Basic (in dollars per share)		$ (1.02)	$ (0.23)	$ (1.06)
Diluted (in dollars per share)		$ (1.02)	$ (0.23)	$ (1.06)
Weighted average shares outstanding:
Basic (in shares)	314,982	313,072	314,724	301,652
Diluted (in shares)	314,982	313,072	314,724	301,652
Oil and gas revenues
Revenues
Total revenues	$ 357,004	$ 397,849	$ 725,786	$ 764,444
Purchased oil and gas
Revenues
Total revenues	109,389	128,064	257,860	195,773
Operating expenses
Expenses	109,662	129,579	259,566	200,173
Midstream Services
Revenues
Total revenues	51,573	29,342	99,594	57,264
Operating expenses
Expenses	17,368	7,688	34,097	15,673
Well Services
Revenues
Total revenues	11,439	18,496	21,897	30,082
Operating expenses
Expenses	$ 8,474	$ 13,560	$ 15,444	$ 20,947

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Non-controlling Interests
Balance (shares) at Dec. 31, 2017		269,295	1,332
Balance at Dec. 31, 2017	$ 3,513,579	$ 2,668	$ (22,179)	$ 2,677,217	$ 717,985	$ 137,888
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation (shares)		2,758
Equity-based compensation	7,208	$ 26		7,116		66
Issuance of common stock due to acquisition (shares)		46,000
Issuance of common stock due to acquisition	371,220	$ 460		370,760
Distributions to non-controlling interest owners	(3,450)					(3,450)
Treasury stock - tax withholdings (shares)		(690)	(690)
Treasury stock - tax withholdings	(6,021)		$ (6,021)
Other	(90)			(90)
Net income (loss)	3,712				590	3,122
Balance (shares) at Mar. 31, 2018		317,363	2,022
Balance at Mar. 31, 2018	3,886,158	$ 3,154	$ (28,200)	3,055,003	718,575	137,626
Balance (shares) at Dec. 31, 2017		269,295	1,332
Balance at Dec. 31, 2017	3,513,579	$ 2,668	$ (22,179)	2,677,217	717,985	137,888
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(312,589)
Balance (shares) at Jun. 30, 2018		317,985	2,025
Balance at Jun. 30, 2018	3,574,251	$ 3,154	$ (28,243)	3,062,861	398,371	138,108
Balance (shares) at Mar. 31, 2018		317,363	2,022
Balance at Mar. 31, 2018	3,886,158	$ 3,154	$ (28,200)	3,055,003	718,575	137,626
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation (shares)		625
Equity-based compensation	7,830			7,730		100
Distributions to non-controlling interest owners	(3,396)					(3,396)
Treasury stock - tax withholdings (shares)		(3)	(3)
Treasury stock - tax withholdings	(43)		$ (43)
Other	3			128		(125)
Net income (loss)	(316,301)				(320,204)	3,903
Balance (shares) at Jun. 30, 2018		317,985	2,025
Balance at Jun. 30, 2018	3,574,251	$ 3,154	$ (28,243)	3,062,861	398,371	138,108
Balance (shares) at Dec. 31, 2018		318,377	2,092
Balance at Dec. 31, 2018	3,918,880	$ 3,157	$ (29,025)	3,077,755	682,689	184,304
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation (shares)		4,360
Equity-based compensation	9,606	$ 25		9,462		119
Distributions to non-controlling interest owners	(4,937)					(4,937)
Treasury stock - tax withholdings (shares)		(686)	(686)
Treasury stock - tax withholdings	(4,261)		$ (4,261)			0
Other	(175)			(134)		(41)
Net income (loss)	(107,978)				(114,882)	6,904
Balance (shares) at Mar. 31, 2019		322,051	2,778
Balance at Mar. 31, 2019	3,811,135	$ 3,182	$ (33,286)	3,087,083	567,807	186,349
Balance (shares) at Dec. 31, 2018		318,377	2,092
Balance at Dec. 31, 2018	3,918,880	$ 3,157	$ (29,025)	3,077,755	682,689	184,304
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(56,804)
Balance (shares) at Jun. 30, 2019		321,894	2,786
Balance at Jun. 30, 2019	3,866,458	$ 3,183	$ (33,330)	3,096,355	610,564	189,686
Balance (shares) at Mar. 31, 2019		322,051	2,778
Balance at Mar. 31, 2019	3,811,135	$ 3,182	$ (33,286)	3,087,083	567,807	186,349
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Equity-based compensation (shares)		(149)
Equity-based compensation	9,566	$ 1		9,465		100
Distributions to non-controlling interest owners	(5,156)					(5,156)
Treasury stock - tax withholdings (shares)		(8)	(8)
Treasury stock - tax withholdings	(44)		$ (44)
Other	(217)			(193)		(24)
Net income (loss)	51,174				42,757	8,417
Balance (shares) at Jun. 30, 2019		321,894	2,786
Balance at Jun. 30, 2019	$ 3,866,458	$ 3,183	$ (33,330)	$ 3,096,355	$ 610,564	$ 189,686

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss including non-controlling interests	$ (56,804)	$ (312,589)
Adjustments to reconcile net loss including non-controlling interests to net cash provided by operating activities:
Depreciation, depletion and amortization	367,191	302,835
Loss on extinguishment of debt	0	13,651
(Gain) loss on sale of properties	3,198	(1,954)
Impairment	653	384,228
Deferred income taxes	8,617	(100,293)
Derivative instruments	82,862	191,401
Equity-based compensation expenses	17,924	14,130
Deferred financing costs amortization and other	12,245	10,518
Working capital and other changes:
Change in accounts receivable, net	(12,914)	(5,866)
Change in inventory	3,029	(4,721)
Change in prepaid expenses	3,918	573
Change in accounts payable, interest payable and accrued liabilities	(36,514)	40,849
Change in other assets and liabilities, net	(4,473)	(746)
Net cash provided by operating activities	388,932	532,016
Cash flows from investing activities:
Capital expenditures	(525,501)	(536,959)
Acquisitions	(5,781)	(524,255)
Proceeds from sale of properties	0	2,236
Derivative settlements	3,629
Derivative settlements		(96,823)
Other	0	(933)
Net cash used in investing activities	(527,653)	(1,156,734)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities	1,178,000	1,933,000
Principal payments on Revolving Credit Facilities	(1,025,000)	(1,265,000)
Repurchase of senior unsecured notes	0	(423,143)
Proceeds from issuance of senior unsecured notes	0	400,000
Deferred financing costs	(482)	(6,790)
Purchases of treasury stock	(4,305)	(6,064)
Distributions to non-controlling interests	(10,093)	(6,846)
Other	(1,331)	(87)
Net cash provided by financing activities	136,789	625,070
Increase (decrease) in cash and cash equivalents	(1,932)	352
Cash and cash equivalents:
Beginning of period	22,190	16,720
End of period	20,258	17,072
Supplemental non-cash transactions:
Change in accrued capital expenditures	(30,598)	90,040
Change in asset retirement obligations	3,840	5,407
Issuance of shares in connection with acquisition	$ 0	$ 371,220

Organization and Operations of

Organization and Operations of the Company	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Operations of the Company	Organization and Operations of the CompanyOasis Petroleum Inc. (together with its consolidated subsidiaries, “Oasis” or the “Company”) is an independent exploration and production company focused on the acquisition and development of onshore, unconventional crude oil and natural gas resources in the United States. Oasis Petroleum North America LLC (“OPNA”) and Oasis Petroleum Permian LLC (“OP Permian”) conduct the Company’s exploration and production activities and own its crude oil and natural gas properties located in the Williston Basin and the Delaware Basin, respectively. In addition to its exploration and production segment, the Company also operates a midstream business segment through Oasis Midstream Partners LP (“OMP”) and Oasis Midstream Services LLC (“OMS”) and a well services business segment through Oasis Well Services LLC (“OWS”). OMP is a growth-oriented, fee-based master limited partnership that develops and operates a diversified portfolio of midstream assets.

Summary of Significant Accounti

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying condensed consolidated financial statements of the Company have not been audited by the Company’s independent registered public accounting firm, except that the Condensed Consolidated Balance Sheet at December 31, 2018 is derived from audited financial statements. Certain reclassifications of prior year balances have been made to conform such amounts to current year classifications. These reclassifications have no impact on net income. In the opinion of management, all adjustments, consisting of normal recurring adjustments necessary for the fair statement of the Company’s financial position, have been included. Management has made certain estimates and assumptions that affect reported amounts in the condensed consolidated financial statements and disclosures of contingencies. Actual results may differ from those estimates. The results for interim periods are not necessarily indicative of annual results. These interim financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain disclosures have been condensed or omitted from these financial statements. Accordingly, they do not include all of the information and notes required by accounting principles generally accepted in the United States of America (“GAAP”) for complete consolidated financial statements and should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (“2018 Annual Report”). Consolidation. The accompanying condensed consolidated financial statements of the Company include the accounts of Oasis, the accounts of wholly-owned subsidiaries and the accounts of OMP and its general partner, OMP GP LLC (“OMP GP”). The Company has determined that the partners with equity at risk in OMP lack the authority, through voting rights or similar rights, to direct the activities that most significantly impact OMP’s economic performance. Therefore, as the limited partners of OMP do not have substantive kick-out or substantive participating rights over OMP GP, OMP is a variable interest entity. Through the Company’s ownership interest in OMP GP, the Company has the authority to direct the activities that most significantly affect economic performance and the right to receive benefits that could be potentially significant to OMP. Therefore, the Company is considered the primary beneficiary and consolidates OMP and records a non-controlling interest for the interest owned by the public. All intercompany balances and transactions have been eliminated upon consolidation. Revision of Prior Period Financial Statements. In connection with the preparation of the Company’s 2018 Annual Report, the Company identified errors in its previously issued 2017 annual consolidated financial statements and in each of the interim periods within 2018 and 2017. These prior period errors related to the manner in which it accounted for certain crude oil purchase and sale arrangements. Specifically, although the Company previously reported the transactions on a net basis, the Company was required to account for these purchase and sale arrangements on a gross basis, in accordance with Accounting Standards Codification 606, Revenue from Contracts with Customers (“ASC 606”) in 2018 , as these transactions were not subject to Accounting Standards Codification 845, Nonmonetary Transactions (“ASC 845”). The correction of these errors had no effect on the reported consolidated net income (loss) attributable to Oasis or earnings (loss) attributable to Oasis per share data. In accordance with Staff Accounting Bulletin (“SAB”) No. 99, Materiality , and SAB No. 108, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements , the Company evaluated the errors and, based on an analysis of quantitative and qualitative factors, determined that the related impact was not material to the Company’s consolidated financial statements for any prior period. Therefore, amendments of previously filed reports are not required. In accordance with Accounting Standards Codification 250, Accounting Changes and Error Corrections , the Company has corrected the errors for the three and six months ended June 30, 2018 by revising the unaudited condensed consolidated financial statements appearing herein. For the three and six months ended June 30, 2018, the revision did not impact the Company’s financial position or cash flows from operations, and the impacts to the Company’s Condensed Consolidated Statement of Operations were as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported Revision As Revised As Reported Revision As Revised (In thousands, except per share data) Oil and gas revenues $ 395,921 $ 1,928 $ 397,849 $ 759,592 $ 4,852 $ 764,444 Purchased oil and gas sales 57,578 70,486 128,064 75,615 120,158 195,773 Total revenues 501,337 72,414 573,751 922,553 125,010 1,047,563 Purchased oil and gas expenses 57,165 72,414 129,579 75,163 125,010 200,173 Total operating expenses 745,965 72,414 818,379 1,054,196 125,010 1,179,206 Net loss attributable to Oasis (320,204) — (320,204) (319,614) — (319,614) Loss attributable to Oasis per share: Basic $ (1.02) $ — $ (1.02) $ (1.06) $ — $ (1.06) Diluted $ (1.02) $ — $ (1.02) $ (1.06) $ — $ (1.06) The accompanying notes to the condensed consolidated financial statements reflect the impact of this revision. Dividends The Company has not paid any cash dividends since its inception. Covenants contained in its revolving credit facilities and the indentures governing the Company’s senior notes restrict the payment of cash dividends on its common stock. The Company currently intends to retain all earnings for the development of its business and for repayment of outstanding debt, and the Company does not anticipate declaring or paying any cash dividends to holders of its common stock. Risks and Uncertainties As a crude oil and natural gas producer, the Company’s revenue, profitability and future growth are substantially dependent upon the prevailing and future prices for crude oil and natural gas, which are dependent upon numerous factors beyond its control such as economic, political and regulatory developments and competition from other energy sources. The energy markets have historically been very volatile, and there can be no assurance that crude oil and natural gas prices will not be subject to wide fluctuations in the future. A substantial or extended decline in prices for crude oil and, to a lesser extent, natural gas could have a material adverse effect on the Company’s financial position, results of operations, cash flows and quantities of crude oil and natural gas reserves that may be economically produced. Significant Accounting Policies There have been no material changes to the Company’s critical accounting policies and estimates from those disclosed in the 2018 Annual Report, other than as noted below. Leases. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) , which requires lessees to recognize a right-of-use (“ROU”) asset and related liability on the balance sheet for leases with durations greater than twelve months and also requires certain quantitative and qualitative disclosures about leasing arrangements. Accounting Standards Codification 842, Leases (“ASC 842”), was subsequently amended by various Accounting Standards Updates, which provided additional implementation guidance. The Company adopted the new standard as of January 1, 2019 using the required modified retrospective approach and elected the option to recognize a cumulative effect adjustment of initially applying the guidance to the opening balance of retained earnings in the period of adoption. Prior period amounts were not adjusted. The Company elected the package of practical expedients under the transition guidance within the new standard, including the practical expedient to not reassess under the new standard any prior conclusions about lease identification, lease classification and initial direct costs; the use-of hindsight practical expedient; the practical expedient to not reassess the prior accounting treatment for existing or expired land easements; and the practical expedient pertaining to combining lease and non-lease components for all asset classes. In addition, the Company elected not to apply the recognition requirements of ASC 842 to leases with terms of one year or less, and as such, recognition of lease payments for short-term leases are recognized in net income on a straight line basis. See Note 17 — Leases for the adoption impact and disclosures required by ASC 842. Recent Accounting Pronouncements Financial Instruments. In August 2018, the FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which improves the effectiveness of the disclosure requirements for fair value measurements. The changes affect all companies

Oasis Midstream Partners

Oasis Midstream Partners	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Oasis Midstream Partners	Oasis Midstream Partners 2019 Capital Expenditures Arrangement. On February 22, 2019, the Company entered into a memorandum of understanding (the “MOU”) with OMP regarding the funding of Bobcat DevCo LLC’s (“Bobcat DevCo”) capital expenditures for the 2019 calendar year (the “2019 Capital Expenditures Arrangement”). Pursuant to the Amended and Restated Limited Liability Company Agreement of Bobcat DevCo LLC, as amended (the “First A&R Bobcat LLCA”), OMS and OMP are each required to make pro-rata capital contributions to Bobcat DevCo in accordance with their respective percentage ownership interests in Bobcat DevCo. Pursuant to the MOU, OMP agreed to make up to $80.0 million of capital contributions to Bobcat DevCo that OMS would otherwise be required to contribute under the First A&R Bobcat LLCA. In connection with execution of the MOU, OMS and OMP have amended the First A&R Bobcat LLCA and entered into the Second Amended and Restated Limited Liability Company Agreement of Bobcat DevCo LLC (the “Second A&R Bobcat LLCA”). The Second A&R Bobcat LLCA includes provisions applicable to the disproportionate capital contributions that OMP will make to Bobcat DevCo in connection with the 2019 Capital Expenditures Arrangement.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue Recognition Disaggregation of revenues Revenues associated with contracts with customers for crude oil, natural gas and natural gas liquids (“NGL”) sales were as follows for the three and six months ended June 30, 2019 and 2018: Exploration and Production Revenues Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Crude oil revenues $ 327,977 $ 363,182 $ 646,098 $ 689,492 Purchased crude oil sales 106,441 127,212 253,577 194,872 Natural gas revenues 9,734 23,059 41,330 50,021 Purchased natural gas sales 2,920 496 4,255 545 NGL revenues 19,293 11,608 38,358 24,931 Total exploration and production revenues $ 466,365 $ 525,557 $ 983,618 $ 959,861 Revenues associated with contracts with customers for midstream services under fee-based arrangements and midstream product sales from purchase arrangements were as follows for the three and six months ended June 30, 2019 and 2018: Midstream Revenues (1) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Midstream service revenues Crude oil and natural gas revenues $ 22,875 $ 17,907 $ 47,538 $ 35,936 Produced and flowback water revenues 9,473 9,058 18,506 17,934 Total midstream service revenues $ 32,348 $ 26,965 $ 66,044 $ 53,870 Midstream product revenues Purchased crude oil sales $ 28 $ 356 $ 28 $ 356 Natural gas and NGL revenues 17,319 — 30,116 — Freshwater revenues 1,906 2,377 3,434 3,394 Total midstream product revenues $ 19,253 $ 2,733 $ 33,578 $ 3,750 Total midstream revenues $ 51,601 $ 29,698 $ 99,622 $ 57,620 __________________ (1) Represents midstream revenues, excluding all intercompany revenues for work performed by the midstream services business segment for the Company’s ownership interests that are eliminated in consolidation and are therefore not included in consolidated midstream services revenues. Revenues associated with contracts with customers for well services were as follows for the three and six months ended June 30, 2019 and 2018: Well Services Revenues (1) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Hydraulic fracturing revenues $ 10,628 $ 17,390 $ 20,403 $ 27,816 Equipment rental revenues 811 1,106 1,494 2,266 Total well services revenues $ 11,439 $ 18,496 $ 21,897 $ 30,082 __________________ (1) Represents well services revenues, excluding all intercompany revenues for work performed by the well services business segment for the Company’s ownership interests that are eliminated in consolidation and are therefore not included in consolidated well services revenues. Prior period performance obligations For sales of commodities, the Company records revenue in the month production is delivered to the purchaser. However, settlement statements and payment may not be received for 30 to 90 days after the date production is delivered, and as a result, the Company is required to estimate the amount of production that was delivered to the purchaser and the price that will be received for the sale of the product. The Company records the differences between estimates and the actual amounts received for product sales once payment is received from the purchaser. Such differences have historically not been significant. The Company uses knowledge of its properties, its properties’ historical performance, spot market prices and other factors as the basis for these estimates. For the three and six months ended June 30, 2019 and 2018, revenue recognized related to performance obligations satisfied in prior reporting periods was not material. Contract balances Contract balances are the result of timing differences between revenue recognition, billings and cash collections. Contract liabilities are recorded for consideration received from customers primarily related to (i) temporary deficiency quantities under minimum volume commitments, which are recognized as revenue when the customer makes up the volumes or the deficiency makeup period expires and (ii) aid in construction payments received from customers which are recognized as revenue over the expected period of future benefit. The Company does not recognize contract assets or contract liabilities under its customer contracts for which invoicing occurs once the Company’s performance obligations have been satisfied and payment is unconditional. No material contract balances were recorded in the condensed consolidated financial statements at June 30, 2019 or December 31, 2018. Remaining performance obligations The following table presents estimated revenue allocated to remaining performance obligations for contracted revenues that are unsatisfied (or partially satisfied) as of June 30, 2019: (In thousands) 2019 (excluding the six months ended June 30, 2019) $ 11,189 2020 24,183 2021 27,035 2022 19,262 2023 12,642 Thereafter 14,642 Total $ 108,953 The partially and wholly unsatisfied performance obligations presented in the table above are generally limited to customer contracts which have fixed pricing and fixed volume terms and conditions, which generally include customer contracts with minimum volume commitment payment obligations.

Inventory

Inventory	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Inventory	Inventory Crude oil inventory includes crude oil in tanks and linefill. Linefill that represents the minimum volume of product in a pipeline system that enables the system to operate is generally not available to be withdrawn from the pipeline system until the expiration of the transportation contract. Crude oil linefill in third party pipelines that is not expected to be withdrawn within one year is included in long-term inventory on the Company’s Condensed Consolidated Balance Sheets. Equipment and materials consist primarily of proppant, chemicals, tubular goods, well equipment to be used in future drilling or repair operations, well fracturing equipment and spare parts and equipment for the Company’s midstream assets. Inventory, including long-term inventory, is stated at the lower of cost and net realizable value with cost determined on an average cost method. The Company assesses the carrying value of inventory and uses estimates and judgment when making any adjustments necessary to reduce the carrying value to net realizable value. Among the uncertainties that impact the Company’s estimates are the applicable quality and location differentials to include in the Company’s net realizable value analysis. Additionally, the Company estimates the upcoming liquidation timing of the inventory. Changes in assumptions made as to the timing of a sale can materially impact net realizable value. Total inventory consists of the following: June 30, 2019 December 31, 2018 (In thousands) Inventory Crude oil inventory $ 11,923 $ 14,933 Equipment and materials 18,133 18,195 Total inventory $ 30,056 $ 33,128 Long-term inventory Linefill in third party pipelines $ 13,286 $ 12,260 Total long-term inventory $ 13,286 $ 12,260 Total $ 43,342 $ 45,388

Accounts Receivable

Accounts Receivable	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Accounts Receivable	Accounts Receivable The following table sets forth the Company’s accounts receivable, net: June 30, 2019 December 31, 2018 (In thousands) Trade accounts $ 262,189 $ 245,546 Joint interest accounts 124,395 133,375 Other accounts 11,137 10,207 Total 397,721 389,128 Allowance for doubtful accounts (1,617) (1,526) Total accounts receivable, net $ 396,104 $ 387,602

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements In accordance with the FASB’s authoritative guidance on fair value measurements, the Company’s financial assets and liabilities are measured at fair value on a recurring basis. The Company’s financial instruments, including certain cash and cash equivalents, accounts receivable, accounts payable and other payables, are carried at cost, which approximates their respective fair market values due to their short-term maturities. The Company recognizes its non-financial assets and liabilities, such as asset retirement obligations (“ARO”) and proved oil and natural gas properties upon impairment, at fair value on a non-recurring basis. As defined in the authoritative guidance, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). To estimate fair value, the Company utilizes market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk and the risks inherent in the inputs to the valuation technique. These inputs can be readily observable, market corroborated or generally unobservable. The authoritative guidance establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities (“Level 1” measurements) and the lowest priority to unobservable inputs (“Level 3” measurements). The three levels of the fair value hierarchy are as follows: Level 1 — Unadjusted quoted prices are available in active markets for identical assets or liabilities as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis. Level 2 — Pricing inputs, other than unadjusted quoted prices in active markets included in Level 1, are either directly or indirectly observable as of the reporting date. Level 2 includes those financial instruments that are valued using models or other valuation methodologies. These models are primarily industry-standard models that consider various assumptions, including quoted forward prices for commodities, time value, volatility factors and current market and contractual prices for the underlying instruments, as well as other relevant economic measures. Substantially all of these assumptions are observable in the marketplace throughout the full term of the instrument and can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. Level 3 — Pricing inputs are generally less observable from objective sources, requiring internally developed valuation methodologies that result in management’s best estimate of fair value. Financial Assets and Liabilities Financial assets and liabilities are classified in their entirety 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 requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels. The following tables set forth by level, within the fair value hierarchy, the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis: Fair value at June 30, 2019 Level 1 Level 2 Level 3 Total (In thousands) Assets: Money market funds $ 144 $ — $ — $ 144 Commodity derivative instruments (see Note 8) — 24,725 — 24,725 Total assets $ 144 $ 24,725 $ — $ 24,869 Liabilities: Commodity derivative instruments (see Note 8) $ — $ 4,445 $ — $ 4,445 Total liabilities $ — $ 4,445 $ — $ 4,445 Fair value at December 31, 2018 Level 1 Level 2 Level 3 Total (In thousands) Assets: Money market funds $ 143 $ — $ — $ 143 Commodity derivative instruments (see Note 8) — 106,875 — 106,875 Total assets $ 143 $ 106,875 $ — $ 107,018 Liabilities: Commodity derivative instruments (see Note 8) $ — $ 104 $ — $ 104 Total liabilities $ — $ 104 $ — $ 104 The Level 1 instruments presented in the tables above consist of money market funds included in cash and cash equivalents on the Company’s Condensed Consolidated Balance Sheets at June 30, 2019 and December 31, 2018. The Company’s money market funds represent cash equivalents backed by the assets of high-quality major banks and financial institutions. The Company identifies the money market funds as Level 1 instruments because the money market funds have daily liquidity, quoted prices for the underlying investments can be obtained, and there are active markets for the underlying investments. The Level 2 instruments presented in the tables above consist of commodity derivative instruments, which include crude oil and natural gas swaps and collars. The fair values of the Company’s commodity derivative instruments are based upon a third party preparer’s calculation using mark-to-market valuation reports provided by the Company’s counterparties for monthly settlement purposes to determine the valuation of its derivative instruments. The Company has the third party preparer evaluate other readily available market prices for its derivative contracts, as there is an active market for these contracts. The third party preparer performs its independent valuation using a moment matching method similar to Turnbull-Wakeman for Asian options. The significant inputs used are crude oil prices, volatility, skew, discount rate and the contract terms of the derivative instruments. The Company compares the third party preparer’s valuation to counterparty valuation statements, investigating any significant differences, and analyzes monthly valuation changes in relation to movements in crude oil and natural gas forward price curves. The determination of the fair value for derivative instruments also incorporates a credit adjustment for non-performance risk, as required by GAAP. The Company calculates the credit adjustment for derivatives in a net asset position using current credit default swap values for each counterparty. The credit adjustment for derivatives in a net liability position is based on the Company’s market credit spread. Based on these calculations, the Company recorded an adjustment to reduce the fair value of its net derivative asset by $0.1 million at June 30, 2019 and by $0.2 million at December 31, 2018. There were no transfers between fair value levels during the six months ended June 30, 2019 and twelve months ended December 31, 2018.

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments The Company utilizes derivative financial instruments to manage risks related to changes in crude oil and natural gas prices. The Company’s crude oil contracts will settle monthly based on the average NYMEX West Texas Intermediate crude oil index price (“NYMEX WTI”), the average Intercontinental Exchange, Inc. Brent crude oil index price (“ICE Brent”), the average Argus WTI Midland crude oil index price (“Midland”) and the average Argus WTI Houston crude oil index price (“Houston”). The Company’s natural gas contracts will settle monthly based on the average NYMEX Henry Hub natural gas index price (“NYMEX HH”). At June 30, 2019, the Company utilized fixed price swaps, basis swaps and two-way and three-way costless collars to reduce the volatility of crude oil and natural gas prices on a significant portion of its future expected crude oil and natural gas production. The Company’s fixed price swaps are comprised of a sold call and a purchased put established at the same price (both ceiling and floor), which the Company will receive for the volumes under contract. A basis swap transaction has an established fixed basis differential corresponding to two floating index prices. Depending on the difference of the two floating index prices in relation to the fixed basis differential, the Company either receives an amount from its counterparty, or pays an amount to its counterparty, equal to the difference multiplied by the hedged contract volume. A two-way collar is a combination of options: a sold call and a purchased put. The purchased put establishes a minimum price (floor) and the sold call establishes a maximum price (ceiling) the Company will receive for the volumes under contract. A three-way collar is a combination of options: a sold call, a purchased put and a sold put. The purchased put establishes a minimum price (floor), unless the market price falls below the sold put (sub-floor), at which point the minimum price would be the index price plus the difference between the purchased put and the sold put strike price. The sold call establishes a maximum price (ceiling) the Company will receive for the volumes under contract. All derivative instruments are recorded on the Company’s Condensed Consolidated Balance Sheets as either assets or liabilities measured at its fair value (see Note 7 — Fair Value Measurements). The Company has not designated any derivative instruments as hedges for accounting purposes and does not enter into such instruments for speculative trading purposes. If a derivative does not qualify as a hedge or is not designated as a hedge, the changes in fair value are recognized in the other income (expense) section of the Company’s Condensed Consolidated Statements of Operations as a net gain or loss on derivative instruments. The Company’s cash flow is only impacted when the actual settlements under the derivative contracts result in making a payment to or receiving a payment from the counterparty. These cash settlements represent the cumulative gains and losses on the Company’s derivative instruments and do not include a recovery of costs that were paid to acquire or modify the derivative instruments that were settled. Cash settlements are reflected as investing activities in the Company’s Condensed Consolidated Statements of Cash Flows. At June 30, 2019, the Company had the following outstanding commodity derivative instruments: Commodity Settlement Derivative Index Volumes Weighted Average Prices Fair Value Fixed Price Swaps Basis Swaps Sub-Floor Floor Ceiling (In thousands) Crude oil 2019 Fixed price swaps NYMEX WTI 4,000,000 Bbl $ 57.04 $ (3,303) Crude oil 2019 Basis swaps ICE Brent-NYMEX WTI 60,000 Bbl $ 9.68 86 Crude oil 2019 Basis swaps Midland-NYMEX WTI 120,000 Bbl $ (6.71) (740) Crude oil 2019 Basis swaps Houston-NYMEX WTI 366,000 Bbl $ 4.55 90 Crude oil 2019 Two-way collar NYMEX WTI 2,592,000 Bbl $ 57.87 $ 74.22 7,308 Crude oil 2019 Three-way collar NYMEX WTI 2,196,000 Bbl $ 40.14 $ 51.52 $ 65.92 (284) Crude oil 2020 Fixed price swaps NYMEX WTI 2,597,000 Bbl $ 59.30 6,728 Crude oil 2020 Two-way collar NYMEX WTI 434,000 Bbl $ 58.07 $ 74.64 1,835 Crude oil 2020 Three-way collar NYMEX WTI 4,268,000 Bbl $ 40.00 $ 53.49 $ 64.49 4,790 Crude oil 2021 Fixed price swaps NYMEX WTI 93,000 Bbl $ 58.85 357 Crude oil 2021 Three-way collar NYMEX WTI 310,000 Bbl $ 40.00 $ 52.97 $ 63.76 376 Natural gas 2019 Fixed price swaps NYMEX HH 5,520,000 MMBtu $ 2.92 3,037 $ 20,280 Subsequent to June 30, 2019, the Company entered into additional fixed price swaps and two-way and three-way costless collars. As of August 9, 2019, the Company had the following outstanding commodity derivative contracts: Commodity Settlement Derivative Index Volumes Weighted Average Prices Fixed Price Swaps Basis Swaps Sub-Floor Floor Ceiling Crude oil 2019 Fixed price swaps NYMEX WTI 4,122,000 Bbl $ 57.13 Crude oil 2019 Basis swaps ICE Brent-NYMEX WTI 60,000 Bbl $ 9.68 Crude oil 2019 Basis swaps Midland-NYMEX WTI 120,000 Bbl $ (6.71) Crude oil 2019 Basis swaps Houston-NYMEX WTI 366,000 Bbl $ 4.55 Crude oil 2019 Two-way collar NYMEX WTI 2,592,000 Bbl $ 57.87 $ 74.22 Crude oil 2019 Three-way collar NYMEX WTI 2,196,000 Bbl $ 40.14 $ 51.52 $ 65.92 Crude oil 2020 Fixed price swaps NYMEX WTI 2,992,000 Bbl $ 59.05 Crude oil 2020 Two-way collar NYMEX WTI 1,650,000 Bbl $ 53.04 $ 64.95 Crude oil 2020 Three-way collar NYMEX WTI 4,574,000 Bbl $ 40.00 $ 53.26 $ 64.48 Crude oil 2021 Fixed price swaps NYMEX WTI 93,000 Bbl $ 58.85 Crude oil 2021 Two-way collar NYMEX WTI 62,000 Bbl $ 50.50 $ 60.70 Crude oil 2021 Three-way collar NYMEX WTI 734,000 Bbl $ 40.00 $ 51.26 $ 64.05 Natural gas 2019 Fixed price swaps NYMEX HH 5,520,000 MMBtu $ 2.92 The following table summarizes the location and amounts of gains and losses from the Company’s commodity derivative instruments recorded in the Company’s Condensed Consolidated Statements of Operations for the periods presented: Three Months Ended June 30, Six Months Ended June 30, Statements of Operations Location 2019 2018 2019 2018 (In thousands) Net gain (loss) on derivative instruments $ 34,749 $ (120,285) $ (82,862) $ (191,401) In accordance with the FASB’s authoritative guidance on disclosures about offsetting assets and liabilities, the Company is required to disclose both gross and net information about instruments and transactions eligible for offset in the statement of financial position as well as instruments and transactions subject to an agreement similar to a master netting agreement. The Company’s derivative instruments are presented as assets and liabilities on a net basis by counterparty, as all counterparty contracts provide for net settlement. No margin or collateral balances are deposited with counterparties, and as such, gross amounts are offset to determine the net amounts presented in the Company’s Condensed Consolidated Balance Sheets. The following table summarizes the location and fair value of all outstanding commodity derivative instruments recorded in the Company’s Condensed Consolidated Balance Sheets: June 30, 2019 Commodity Balance Sheet Location Gross Recognized Assets/Liabilities Gross Amount Offset Net Recognized Fair Value Assets/ Liabilities (In thousands) Derivatives assets: Commodity contracts Derivative instruments — current assets $ 28,196 $ (9,107) $ 19,089 Commodity contracts Derivative instruments — non-current assets 12,237 (6,601) 5,636 Total derivatives assets $ 40,433 $ (15,708) $ 24,725 Derivatives liabilities: Commodity contracts Derivative instruments — current liabilities $ 11,265 $ (6,820) $ 4,445 Commodity contracts Derivative instruments — non-current liabilities — — — Total derivatives liabilities $ 11,265 $ (6,820) $ 4,445 December 31, 2018 Commodity Balance Sheet Location Gross Recognized Assets/Liabilities Gross Amount Offset Net Recognized Fair Value Assets/Liabilities (In thousands) Derivatives assets: Commodity contracts Derivative instruments — current assets $ 110,729 $ (10,799) $ 99,930 Commodity contracts Derivative instruments — non-current assets 8,251 (1,306) 6,945 Total derivatives assets $ 118,980 $ (12,105) $ 106,875 Derivatives liabilities: Commodity contracts Derivative instruments — current liabilities $ 84 $ — $ 84 Commodity contracts Derivative instruments — non-current liabilities 20 — 20 Total derivatives liabilities $ 104 $ — $ 104

Property, Plant and Equipment

Property, Plant and Equipment	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment	Property, Plant and Equipment The following table sets forth the Company’s property, plant and equipment: June 30, 2019 December 31, 2018 (In thousands) Proved oil and gas properties (1) $ 8,244,667 $ 7,878,104 Less: Accumulated depreciation, depletion, amortization and impairment (3,205,534) (2,853,353) Proved oil and gas properties, net 5,039,133 5,024,751 Unproved oil and gas properties 1,038,795 1,034,085 Other property and equipment (2) 1,301,835 1,151,772 Less: Accumulated depreciation (210,649) (183,499) Other property and equipment, net 1,091,186 968,273 Total property, plant and equipment, net $ 7,169,114 $ 7,027,109 __________________ (1) Included in the Company’s proved oil and gas properties are estimates of future asset retirement costs of $42.2 million and $40.5 million at June 30, 2019 and December 31, 2018, respectively. (2) Included in the Company’s other property and equipment are estimates of future asset retirement costs of $1.4 million and $1.3 million at June 30, 2019 and December 31, 2018, respectively.

Divestitures

Divestitures	6 Months Ended
	Jun. 30, 2019
Discontinued Operations and Disposal Groups [Abstract]
Divestitures	DivestituresDuring the six months ended June 30, 2019, the Company completed the final closing statements for the sale of non-strategic oil and gas properties and certain other property and equipment primarily located in the Foreman Butte area of the Williston Basin. The Company recognized an additional $0.3 million and $3.2 million net loss on sale of properties, which includes customary closing adjustments, in its Condensed Consolidated Statements of Operations for the three and six months ended June 30, 2019, respectively. The additional amounts recognized for the divested properties were in the Company’s exploration and production segment.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt The Company’s long-term debt consists of the following: June 30, 2019 December 31, 2018 (In thousands) Oasis Credit Facility $ 531,000 $ 468,000 OMP Credit Facility 408,000 318,000 Senior unsecured notes 6.50% senior unsecured notes due November 1, 2021 71,835 71,835 6.875% senior unsecured notes due March 15, 2022 901,480 901,480 6.875% senior unsecured notes due January 15, 2023 366,094 366,094 6.25% senior unsecured notes due May 1, 2026 400,000 400,000 2.625% senior unsecured convertible notes due September 15, 2023 300,000 300,000 Total principal of senior unsecured notes 2,039,409 2,039,409 Less: unamortized deferred financing costs on senior unsecured notes (18,507) (20,865) Less: unamortized debt discount on senior unsecured convertible notes (63,378) (69,268) Total long-term debt $ 2,896,524 $ 2,735,276 Senior secured revolving line of credit. The Company has a senior secured revolving line of credit among OPNA, as Borrower, Wells Fargo Bank, N.A., as administrative agent and the lenders party thereto (the “Oasis Credit Facility”) with an overall senior secured line of credit of $3,000.0 million as of June 30, 2019, which has a maturity date of the earlier of (i) October 16, 2023, (ii) 90 days prior to the maturity date of the Company’s senior unsecured notes due in 2022 and 2023, of which $1,267.6 million is outstanding, to the extent such senior unsecured notes are not retired or refinanced to have a maturity date at least 90 days after October 16, 2023 and (iii) 90 days prior to the maturity date of the Company’s senior unsecured convertible notes due in 2023, of which $300.0 million is outstanding, to the extent such senior unsecured convertible notes are not retired, converted, redeemed or refinanced to have a maturity date at least 90 days after October 16, 2023. The Oasis Credit Facility is restricted to a borrowing base, which is reserve-based and subject to semi-annual redeterminations on April 1 and October 1 of each year. On April 15, 2019, the lenders under the Oasis Credit Facility completed their regular semi-annual redetermination of the borrowing base scheduled for April 1, 2019, which reaffirmed the borrowing base and the aggregate elected commitment at $1,600.0 million and $1,350.0 million, respectively. In connection with the April 1, 2019 borrowing base redetermination, the Company entered into the First Amendment to the Third Amended and Restated Credit Agreement to the Oasis Credit Facility, dated April 15, 2019, which, among other things, incorporated the ability for the Company to request swingline loans subject to a swingline loans sublimit of $50.0 million. All other significant rates, terms and conditions of the Oasis Credit Facility remained the same. The next redetermination of the Oasis Credit Facility’s borrowing base is scheduled for October 1, 2019. At June 30, 2019, the Company had $531.0 million of London Interbank Offered Rate (“LIBOR”) loans at a weighted average interest rate of 4.2% and $14.0 million of outstanding letters of credit issued under the Oasis Credit Facility, resulting in an unused borrowing base committed capacity of $805.0 million. On a quarterly basis, the Company also pays a commitment fee that can range from 0.375% to 0.500% on the average amount of borrowing base capacity not utilized during the quarter and fees calculated on the average amount of letter of credit balances outstanding during the quarter. The Company was in compliance with the financial covenants of the Oasis Credit Facility as of June 30, 2019. OMP Operating LLC revolving line of credit. Through its ownership of OMP, the Company has access to a senior secured revolving credit facility among OMP, as parent, OMP Operating LLC, a subsidiary of OMP, as borrower, Wells Fargo Bank, N.A., as administrative agent and the lenders party thereto (the “OMP Credit Facility,” and, together with the Oasis Credit Facility, the “Revolving Credit Facilities”). The OMP Credit Facility is available to fund working capital and to finance acquisitions and other capital expenditures of OMP. On May 6, 2019, OMP entered into an amendment to the OMP Credit Facility to (i) increase the aggregate amount of commitments from $400.0 million to $475.0 million; (ii) provide for the ability to further increase commitments to $675.0 million; and (iii) add a new lender to the bank group. As of June 30, 2019, the OMP Credit Facility has an aggregate amount of commitments of $475.0 million and has a maturity date of September 25, 2022. At June 30, 2019, the Company had $408.0 million of borrowings outstanding under the OMP Credit Facility at a weighted average interest rate of 4.2%, and $8.2 million of outstanding letters of credit, resulting in an unused borrowing base capacity of $58.8 million. The unused portion of the OMP Credit Facility is subject to a commitment fee ranging from 0.375% to 0.500%. The Company was in compliance with the financial covenants under the OMP Credit Facility at June 30, 2019. The Revolving Credit Facilities are recorded at values that approximate fair value since their variable interest rates are tied to current market rates. Senior unsecured notes. At June 30, 2019, the Company had $1,739.4 million principal amount of senior unsecured notes outstanding with maturities ranging from November 2021 to May 2026 and coupons ranging from 6.25% to 6.875% (the “Senior Notes”). Prior to certain dates, the Company has the option to redeem some or all of the Senior Notes for cash at certain redemption prices equal to a certain percentage of their principal amount plus an applicable make-whole premium and accrued and unpaid interest to the redemption date. Senior unsecured convertible notes. At June 30, 2019, the Company had $300.0 million of 2.625% senior unsecured convertible notes due September 2023 (the “Senior Convertible Notes”). The Company has the option to settle conversions of these notes with cash, shares of common stock or a combination of cash and common stock at its election. The Company’s intent is to settle the principal amount of the Senior Convertible Notes in cash upon conversion. Prior to March 15, 2023, the Senior Convertible Notes will be convertible only under the following circumstances: (i) during any calendar quarter commencing after the calendar quarter ending on September 30, 2016 (and only during such calendar quarter), if the last reported sale price of the Company’s common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day; (ii) during the five business day period after any five consecutive trading day period (the “Measurement Period”) in which the trading price per $1,000 principal amount of the Senior Convertible Notes for each trading day of the Measurement Period is less than 98% of the product of the last reported sale price of the Company’s common stock and the conversion rate on each such trading day; or (iii) upon the occurrence of specified corporate events, including certain distributions or a fundamental change. On or after March 15, 2023, the Senior Convertible Notes will be convertible at any time until the second scheduled trading day immediately preceding their September 15, 2023 maturity date. The Senior Convertible Notes will be convertible at an initial conversion rate of 76.3650 shares of the Company’s common stock per $1,000 principal amount of the Senior Convertible Notes, which is equivalent to an initial conversion price of approximately $13.10. The conversion rate will be subject to adjustment in some events but will not be adjusted for any accrued and unpaid interest. In addition, following certain corporate events that occur prior to the maturity date or a notice of redemption, the Company will increase the conversion rate for a holder who elects to convert its Senior Convertible Notes in connection with such corporate event or redemption in certain circumstances. As of June 30, 2019, none of the contingent conditions allowing holders of the Senior Convertible Notes to convert these notes had been met. In addition, the Company was in compliance with the terms of the indentures for the Senior Convertible Notes as of June 30, 2019.

Asset Retirement Obligations

Asset Retirement Obligations	6 Months Ended
	Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	Asset Retirement Obligations The following table reflects the changes in the Company’s ARO during the six months ended June 30, 2019: (In thousands) Balance at December 31, 2018 $ 52,449 Liabilities incurred during period 1,019 Liabilities settled during period (139) Accretion expense during period (1) 1,928 Revisions to estimates 827 Balance at June 30, 2019 $ 56,084 ___________________ (1) Included in depreciation, depletion and amortization on the Company’s Condensed Consolidated Statements of Operations. At June 30, 2019, the current portion of the total ARO balance was approximately $0.9 million and was included in accrued liabilities on the Company’s Condensed Consolidated Balance Sheets.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company’s effective tax rate for the three and six months ended June 30, 2019 was 19.3% on a pre-tax income of $63.4 million and (17.7)% on a pre-tax loss of $48.3 million, respectively, as compared to an effective tax rate of 24.2% on a pre-tax loss of $417.3 million and 24.3% on a pre-tax loss of $412.8 million for the three and six months ended June 30, 2018, respectively. The effective tax rate for the three months ended June 30, 2019 was lower than the statutory federal rate of 21% primarily due to the impact of non-controlling interests, partially offset by state income taxes and the impact of other permanent differences, primarily non-deductible executive compensation . The effective tax rate for the six months ended June 30, 2019 was lower than the statutory federal rate of 21% primarily due to the impacts of non-controlling interests and equity-based compensation shortfalls. These decreases were partially offset by state income taxes and other permanent differences, primarily non-deductible executive compensation . The effective tax rate for the three and six months ended June 30, 2018 was higher than the statutory federal rate of 21% primarily due to state income taxes.

Equity-Based Compensation

Equity-Based Compensation	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Equity-Based Compensation	Equity-Based Compensation Restricted stock awa rds. The Company has granted restricted stock awards to employees and directors under its Amended and Restated 2010 Long Term Incentive Plan, the majority of which vest over a three During the six months ended June 30, 2019, employees and non-employee directors of the Company were granted restricted stock awards equal to 4,035,175 shares of common stock with a $6.62 weighted average grant date per share value. Equity-based compensation expense recorded for restricted stock awards was $6.3 million and $12.6 million for the three and six months ended June 30, 2019 , respectively, and $4.9 million and $9.6 million for the three and six months ended June 30, 2018, respectively. Equity-based compensation expense is included in general and administrative expenses on the Company’s Condensed Consolidated Statements of Operations. Performance share units. The Company has granted performance share units (“PSUs”) to officers of the Company under its Amended and Restated 2010 Long Term Incentive Plan. The PSUs are awards of restricted stock units, and each PSU that is earned represents the right to receive one share of the Company’s common stock. The Company accounts for PSUs as equity awards pursuant to the FASB’s authoritative guidance for share-based payments. The number of PSUs to be earned is subject to a market condition, which is based on a comparison of the total shareholder return (“TSR”) achieved with respect to shares of the Company’s common stock against the TSR achieved by a defined peer group at the end of the performance periods. Depending on the Company’s TSR performance relative to the defined peer group, award recipients will earn between 0% and 200% of the initial PSUs granted. All compensation expense related to the PSUs will be recognized if the requisite performance period is fulfilled, even if the market condition is not achieved. The aggregate grant date fair value of the market-based awards was determined using a Monte Carlo simulation model. The Monte Carlo simulation model uses assumptions regarding random projections and must be repeated numerous times to achieve a probabilistic assessment. The key valuation assumptions for the Monte Carlo model are the forecast period, initial value, stock price on the date of grant, risk-free interest rate, volatility and correlation coefficients. The risk-free interest rates are the U.S. Treasury bond rates on the date of grant that correspond to each performance period. The initial value is the average of the volume weighted average prices for the 30 trading days prior to the start of the performance cycle for the Company and each of its peers. Volatility was calculated from the daily historical returns of stock prices over a historical period for the Company and each of its peers. The correlation coefficients are measures of the strength of the linear relationship between and amongst the Company and its peers estimated based on historical stock price data. The following assumptions were used for the Monte Carlo model to determine the grant date fair value and associated equity-based compensation expense of the PSUs granted during the six months ended June 30, 2019: Risk-free interest rate 2.55% - 2.56% Oasis volatility 71.17 % Oasis initial value $5.85 Oasis stock price on date of grant $6.63 During the six months ended June 30, 2019, officers of the Company were granted 1,685,090 PSUs with a $6.80 weighted average grant date per unit value. Equity-based compensation expense recorded for PSUs was $2.5 million and $5.0 million for the three and six months ended June 30, 2019, respectively, and $2.3 million and $4.2 million for the three and six months ended June 30, 2018, respectively. Equity-based compensation e xpense is included in general and administrative expenses on the Company’s Condensed Consolidated Statements of Operations. OMP phantom unit awards . The Company has granted OMP phantom unit awards (collectively, the “OMP Phantom Unit Awards,” and each an “OMP Phantom Unit”) to employees under its Amended and Restated 2010 Long Term Incentive Plan in 2018 and 2019, and in 2017, under OMP GP’s Oasis Midstream Partners LP 2017 Long Term Incentive Plan. Each OMP Phantom Unit represents the right to receive, upon vesting of the award, a cash payment equal to the fair market value of one OMP common unit on the day prior to the date it vests (the “Vesting Date”). Award recipients are also entitled to Distribution Equivalent Rights (“DER”) with respect to each OMP Phantom Unit received. Each DER represents the right to receive, upon vesting of the award, a cash payment equal to the value of the distributions paid on one OMP common unit between the grant date and the applicable Vesting Date. The OMP Phantom Unit Awards vest in equal amounts each year over a three-year period, and compensation expense will be recognized over the requisite service period and is included in general and administrative expenses on the Company’s Condensed Consolidated Statements of Operations. The OMP Phantom Unit Awards are accounted for as liability-classified awards since the awards will settle in cash, and equity-based compensation expense is accounted for under the fair value method in accordance with GAAP. Under the fair value method for liability-classified awards, compensation expense is remeasured each reporting period at fair value based upon the closing price of a publicly traded common unit. The Company will directly pay, or will reimburse OMP, for the cash settlement amount of these awards. During the six months ended June 30, 2019, the Company granted 341,290 OMP Phantom Unit Awards to certain employees of Oasis with a weighted average grant date fair value of $18.57 per unit. Equity-based compensation expense recorded for the OMP Phantom Unit Awards was $0.8 million and $1.5 million for the three and six months ended June 30, 2019, respectively, and $0.1 million and $0.2 million for the three and six months ended June 30, 2018 , respectively, and is included in general and administrative expenses on the Company’s Condensed Consolidated Statements of Operations. OMP restricted unit awards. During the six months ended June 30, 2019, independent directors of OMP were granted 16,170 restricted unit awards, which vest over a one for the three and six months ended June 30, 2019, respectively, and $0.1 million and $0.2 million for the three and six months ended June 30, 2018, respectively,

Earnings (Loss) Per Share

Earnings (Loss) Per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings (Loss) Per Share	Earnings (Loss) Per ShareBasic earnings (loss) per share is computed by dividing the earnings (loss) attributable to Oasis common stockholders by the weighted average number of shares outstanding for the periods presented. The calculation of diluted earnings (loss) per share includes the potential dilutive impact of unvested restricted stock awards and contingently issuable shares related to PSUs and the Senior Convertible Notes during the periods presented, unless its effect is anti-dilutive. There are no adjustments made to the income (loss) attributable to Oasis available to common stockholders in the calculation of diluted earnings (loss) per share. The following is a calculation of the basic and diluted weighted average shares outstanding for the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Basic and diluted weighted average common shares outstanding 314,982 313,072 314,724 301,652 For the six months ended June 30, 2019 and for the three and six months ended June 30, 2018, the Company incurred a net loss, and therefore the diluted loss per share calculation for the period excludes the anti-dilutive effect of unvested stock awards. In addition, the diluted earnings per share calculation for the three months ended June 30, 2019 excludes the dilutive effect of unvested stock awards that were anti-dilutive under the treasury stock method. The following is a calculation of weighted average common shares excluded from diluted earnings (loss) per share due to the anti-dilutive effect: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Restricted stock awards and PSUs 10,406 7,515 10,369 7,440 The Company issued its Senior Convertible Notes in September 2016 (see Note 11 — Long-Term Debt). The Company has the option to settle conversions of its Senior Convertible Notes with cash, shares of common stock or a combination of cash and common stock at its election. The Company’s intent is to settle the principal amount of the Senior Convertible Notes in cash upon conversion. As a result, only the amount by which the conversion value exceeds the aggregate principal amount of the notes (conversion spread) is considered in the diluted earnings per share computation under the treasury stock method. As of June 30, 2019 and 2018 , the conversion value did not exceed the principal amount of the notes, and accordingly, there was no impact to diluted earnings per share for the three and six months ended June 30, 2019 and 2018

Business Segment Information

Business Segment Information	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Business Segment Information	Business Segment Information The Company’s exploration and production segment is engaged in the acquisition and development of oil and natural gas properties. Revenues for the exploration and production segment are derived from the sale of crude oil and natural gas production. The Company’s midstream services business segment performs produced and flowback water gathering and disposal services, fresh water services, natural gas gathering and processing and crude oil gathering and transportation and other midstream services for crude oil and natural gas wells operated by the Company as well as third-party operated wells. Revenues for the midstream segment are primarily derived from produced and flowback water pipeline transport, produced and flowback water disposal, fresh water sales, natural gas gathering and processing and crude oil gathering, blending, stabilization and transportation. The Company’s well services business segment performs completion services for the Company’s crude oil and natural gas wells. Revenues for the well services segment are derived from providing well services, product sales and equipment rentals. The revenues and expenses related to work performed by OMP, OMS and OWS for the Company's ownership interests are eliminated in consolidation, and only the revenues and expenses related to non-affiliated working interest owners are included in the Company’s Condensed Consolidated Statements of Operations. These segments represent the Company’s three operating units, each offering different products and services. The Company’s corporate activities have been allocated to the supported business segments accordingly. Management evaluates the performance of the Company’s business segments based on operating income, which is defined as segment operating revenues less operating expenses, including depreciation, depletion and amortization (“DD&A”). For the three and six months ended June 30, 2018, the Company has revised the condensed consolidated financial statements and business segment financial information to reflect the correction of errors related to the manner in which it accounted for certain crude oil purchase and sale arrangements, which are included in the Company’s exploration and production segment and had no effect on operating income. Please see Note 2 — Summary of Significant Accounting Policies for more information related to the revision. The following table summarizes financial information for the Company’s three business segments for the periods presented: Exploration and Midstream Services Well Services Eliminations Consolidated (In thousands) Three months ended June 30, 2019: Revenues from non-affiliates $ 466,365 $ 51,601 $ 11,439 $ — $ 529,405 Inter-segment revenues — 67,844 27,842 (95,686) — Total revenues 466,365 119,445 39,281 (95,686) 529,405 Operating income 18,895 55,216 1,487 (4,026) 71,572 Other income (expense), net (3,970) (4,200) 12 — (8,158) Income before income taxes including non-controlling interests $ 14,925 $ 51,016 $ 1,499 $ (4,026) $ 63,414 General and administrative $ 25,761 $ 7,980 $ 6,088 $ (8,903) $ 30,926 Equity-based compensation 8,522 515 527 (653) 8,911 Three months ended June 30, 2018: Revenues from non-affiliates $ 525,557 $ 29,698 $ 18,496 $ — $ 573,751 Inter-segment revenues — 39,710 41,418 (81,128) — Total revenues 525,557 69,408 59,914 (81,128) 573,751 Operating income (loss) (280,090) 37,894 8,028 (8,506) (242,674) Other income (expense), net (174,572) (79) 23 — (174,628) Income (loss) before income taxes including non-controlling interests $ (454,662) $ 37,815 $ 8,051 $ (8,506) $ (417,302) General and administrative $ 23,492 $ 6,079 $ 5,756 $ (7,097) $ 28,230 Equity-based compensation 7,012 409 409 (454) 7,376 Six months ended June 30, 2019: Revenues from non-affiliates $ 983,618 $ 99,622 $ 21,897 $ — $ 1,105,137 Inter-segment revenues — 126,405 50,015 (176,420) — Total revenues 983,618 226,027 71,912 (176,420) 1,105,137 Operating income 20,819 105,022 2,302 (6,127) 122,016 Other income (expense), net (162,352) (7,948) 17 — (170,283) Income (loss) before income taxes including non-controlling interests $ (141,533) $ 97,074 $ 2,319 $ (6,127) $ (48,267) General and administrative $ 53,288 $ 16,841 $ 13,549 $ (18,293) $ 65,385 Equity-based compensation 17,102 980 1,088 (1,246) 17,924 Six months ended June 30, 2018: Revenues from non-affiliates $ 959,861 $ 57,620 $ 30,082 $ — $ 1,047,563 Inter-segment revenues — 76,350 74,721 (151,071) — Total revenues 959,861 133,970 104,803 (151,071) 1,047,563 Operating income (loss) (200,130) 70,132 16,178 (15,869) (129,689) Other expense, net (282,717) (336) (20) — (283,073) Income (loss) before income taxes including non-controlling interests $ (482,847) $ 69,796 $ 16,158 $ (15,869) $ (412,762) General and administrative $ 46,971 $ 12,493 $ 11,647 $ (14,941) $ 56,170 Equity-based compensation 13,463 780 795 (908) 14,130 At June 30, 2019: Property, plant and equipment, net $ 6,336,438 $ 1,024,625 $ 30,792 $ (222,741) $ 7,169,114 Total assets (1) 6,804,705 1,057,033 36,292 (187,742) 7,710,288 At December 31, 2018: Property, plant and equipment, net $ 6,311,566 $ 893,285 $ 38,871 $ (216,613) $ 7,027,109 Total assets (1) 6,838,987 920,619 48,150 (181,614) 7,626,142 ___________________

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases As discussed in Note 2 — Summary of Significant Accounting Policies, the Company adopted ASC 842 as of January 1, 2019 using the modified retrospective method, which resulted in the Company recognizing operating lease ROU assets and lease liabilities of $31.1 million and $37.1 million, respectively. In addition, the Company recognized offsetting finance lease ROU assets and lease liabilities of $6.0 million. There was no impact to the opening equity balance as a result of adoption as the difference between the asset and liability balance is attributable to reclasses of pre-existing balances, such as deferred rent, into the lease asset balance. Prior period amounts are not adjusted and continue to be reported in accordance with the previous guidance, Accounting Standards Codification 840 (“ASC 840”). In accordance with the adoption of ASC 842, management determines whether an arrangement is a lease at its inception. The Company’s operating and finance leases consist primarily of office space, drilling rigs, vehicles and other property and equipment used in its operations. The operating lease ROU asset also includes any lease incentives received in the recognition of the present value of future lease payments. The Company considers renewal and termination options in determining the lease term used to establish its ROU assets and lease liabilities to the extent the Company is reasonably certain to exercise the renewal or termination. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of future lease payments. The Company has determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. For the three and six months ended June 30, 2019, the Company incurred lease expenses, which includes short-term leases. The following table sets forth the Company’s components of lease expense: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 (In thousands) Operating lease costs $ 6,799 $ 18,475 Variable lease costs (1) 3,963 5,003 Short-term lease costs 907 1,370 Finance lease costs: Amortization of ROU assets 650 1,216 Interest on lease liabilities 69 124 Total lease costs $ 12,388 $ 26,188 ___________________ (1) Based on payments made by the Company to lessors for the right to use an underlying asset that vary because of changes in circumstances occurring after the commencement date, other than the passage of time, such as property taxes, operating and maintenance costs. The amounts disclosed herein include costs associated with properties operated by the Company that are presented on a gross basis and do not reflect the Company's net proportionate share of such amounts. A portion of these costs have been or will be billed to other working interest owners. The Company’s share of operating, variable and short-term lease costs are either capitalized and included in property, plant and equipment on the Company’s Condensed Consolidated Balance Sheets or are recognized in the Company’s Condensed Consolidated Statements of Operations in lease operating expenses, midstream expenses and general and administrative expenses, as applicable. The finance lease costs for the amortization of ROU assets and the interest on lease liabilities disclosed above are included in depreciation, depletion and amortization and interest expense, net of capitalized interest, respectively, on the Company’s Condensed Consolidated Statements of Operations. As of June 30, 2019, maturities of the Company’s lease liabilities are as follows: Operating Leases Finance Leases (In thousands) 2019 (excluding the six months ended June 30, 2019) $ 6,276 $ 1,440 2020 4,594 2,881 2021 1,680 2,068 2022 2,297 1,298 2023 2,345 234 Thereafter 12,802 684 Total future lease payments $ 29,994 $ 8,605 Less: Imputed interest 4,137 705 Present value of future lease payments $ 25,857 $ 7,900 As of December 31, 2018, future minimum annual rental commitments under non-cancelable leases under ASC 840 were as follows: (In thousands) 2019 $ 8,723 2020 7,009 2021 6,005 2022 5,130 2023 4,361 Thereafter 13,134 Total future minimum lease payments $ 44,362 Supplemental balance sheet information related to the Company’s leases are as follows: Balance Sheet Location June 30, 2019 (In thousands) Assets Operating lease assets Operating right-of-use assets $ 20,054 Finance lease assets (1) Other assets 7,900 Total lease assets $ 27,954 Liabilities Current Operating lease liabilities Current operating lease liabilities $ 7,837 Finance lease liabilities Other current liabilities 2,626 Long-term Operating lease liabilities Operating lease liabilities 18,021 Finance lease liabilities Other liabilities 5,247 Total lease liabilities $ 33,731 ___________________ (1) Finance lease ROU assets are recorded net of accumulated amortization of $1.2 million as of June 30, 2019. Supplemental cash flow information and non-cash transactions related to the Company’s leases are as follows: June 30, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 16,696 Operating cash flows from finance leases 124 Financing cash flows from finance leases 941 ROU assets obtained in exchange for lease obligations Operating leases $ 6,803 Finance leases 3,174 Weighted-average remaining lease term and discount rate for the Company’s leases are as follows: As of June 30, 2019 Operating Leases Weighted average remaining lease term 7.1 years Weighted average discount rate 4.0 % Finance Leases Weighted average remaining lease term 4.1 years Weighted average discount rate 3.8 %
Leases	Leases As discussed in Note 2 — Summary of Significant Accounting Policies, the Company adopted ASC 842 as of January 1, 2019 using the modified retrospective method, which resulted in the Company recognizing operating lease ROU assets and lease liabilities of $31.1 million and $37.1 million, respectively. In addition, the Company recognized offsetting finance lease ROU assets and lease liabilities of $6.0 million. There was no impact to the opening equity balance as a result of adoption as the difference between the asset and liability balance is attributable to reclasses of pre-existing balances, such as deferred rent, into the lease asset balance. Prior period amounts are not adjusted and continue to be reported in accordance with the previous guidance, Accounting Standards Codification 840 (“ASC 840”). In accordance with the adoption of ASC 842, management determines whether an arrangement is a lease at its inception. The Company’s operating and finance leases consist primarily of office space, drilling rigs, vehicles and other property and equipment used in its operations. The operating lease ROU asset also includes any lease incentives received in the recognition of the present value of future lease payments. The Company considers renewal and termination options in determining the lease term used to establish its ROU assets and lease liabilities to the extent the Company is reasonably certain to exercise the renewal or termination. The Company’s lease agreements do not contain any material residual value guarantees or material restrictive covenants. As most of the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate based on the information available at commencement date in determining the present value of future lease payments. The Company has determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. For the three and six months ended June 30, 2019, the Company incurred lease expenses, which includes short-term leases. The following table sets forth the Company’s components of lease expense: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 (In thousands) Operating lease costs $ 6,799 $ 18,475 Variable lease costs (1) 3,963 5,003 Short-term lease costs 907 1,370 Finance lease costs: Amortization of ROU assets 650 1,216 Interest on lease liabilities 69 124 Total lease costs $ 12,388 $ 26,188 ___________________ (1) Based on payments made by the Company to lessors for the right to use an underlying asset that vary because of changes in circumstances occurring after the commencement date, other than the passage of time, such as property taxes, operating and maintenance costs. The amounts disclosed herein include costs associated with properties operated by the Company that are presented on a gross basis and do not reflect the Company's net proportionate share of such amounts. A portion of these costs have been or will be billed to other working interest owners. The Company’s share of operating, variable and short-term lease costs are either capitalized and included in property, plant and equipment on the Company’s Condensed Consolidated Balance Sheets or are recognized in the Company’s Condensed Consolidated Statements of Operations in lease operating expenses, midstream expenses and general and administrative expenses, as applicable. The finance lease costs for the amortization of ROU assets and the interest on lease liabilities disclosed above are included in depreciation, depletion and amortization and interest expense, net of capitalized interest, respectively, on the Company’s Condensed Consolidated Statements of Operations. As of June 30, 2019, maturities of the Company’s lease liabilities are as follows: Operating Leases Finance Leases (In thousands) 2019 (excluding the six months ended June 30, 2019) $ 6,276 $ 1,440 2020 4,594 2,881 2021 1,680 2,068 2022 2,297 1,298 2023 2,345 234 Thereafter 12,802 684 Total future lease payments $ 29,994 $ 8,605 Less: Imputed interest 4,137 705 Present value of future lease payments $ 25,857 $ 7,900 As of December 31, 2018, future minimum annual rental commitments under non-cancelable leases under ASC 840 were as follows: (In thousands) 2019 $ 8,723 2020 7,009 2021 6,005 2022 5,130 2023 4,361 Thereafter 13,134 Total future minimum lease payments $ 44,362 Supplemental balance sheet information related to the Company’s leases are as follows: Balance Sheet Location June 30, 2019 (In thousands) Assets Operating lease assets Operating right-of-use assets $ 20,054 Finance lease assets (1) Other assets 7,900 Total lease assets $ 27,954 Liabilities Current Operating lease liabilities Current operating lease liabilities $ 7,837 Finance lease liabilities Other current liabilities 2,626 Long-term Operating lease liabilities Operating lease liabilities 18,021 Finance lease liabilities Other liabilities 5,247 Total lease liabilities $ 33,731 ___________________ (1) Finance lease ROU assets are recorded net of accumulated amortization of $1.2 million as of June 30, 2019. Supplemental cash flow information and non-cash transactions related to the Company’s leases are as follows: June 30, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 16,696 Operating cash flows from finance leases 124 Financing cash flows from finance leases 941 ROU assets obtained in exchange for lease obligations Operating leases $ 6,803 Finance leases 3,174 Weighted-average remaining lease term and discount rate for the Company’s leases are as follows: As of June 30, 2019 Operating Leases Weighted average remaining lease term 7.1 years Weighted average discount rate 4.0 % Finance Leases Weighted average remaining lease term 4.1 years Weighted average discount rate 3.8 %

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies As of June 30, 2019, there have been no material changes to the Company’s future commitments disclosed in Note 20 — Commitments and Contingencies in the Company's 2018 Annual Report, except as noted below. The amounts disclosed represent undiscounted cash flows on a gross basis, and no inflation elements have been applied. Volume commitment agreements. As of June 30, 2019, the Company had certain agreements with an aggregate requirement to deliver or transport a minimum quantity of approximately 48.3 MMBbl of crude oil, 39.5 MMBbl of natural gas liquids, 900.2 Bcf of natural gas and 31.7 MMBbl of water, prior to any applicable volume credits, within specified timeframes, all of which are ten years or less. As of June 30, 2019, the estimable future commitments under these agreements were approximately $643.1 million. The future commitments under certain agreements cannot be estimated as they are based on fixed differentials relative to a commodity index price under the agreements as compared to the differential relative to a commodity index price for the Williston Basin for the production month. The commitments under these arrangements are not recorded in the accompanying Condensed Consolidated Balance Sheet as of June 30, 2019. Lease commitments. The Company has various operating and finance lease commitments that consists primarily of offices, drilling rigs, vehicles and other property and equipment used in its operations. See Note 17 — Leases for additional information. Litigation. The Company is party to various legal and/or regulatory proceedings from time to time arising in the ordinary course of business. When the Company determines that a loss is probable of occurring and is reasonably estimable, the Company accrues an undiscounted liability for such contingencies based on its best estimate using information available at the time. The Company discloses contingencies where an adverse outcome may be material, or in the judgment of management, the matter should otherwise be disclosed. Mirada litigation. On March 23, 2017, Mirada Energy, LLC, Mirada Wild Basin Holding Company, LLC and Mirada Energy Fund I, LLC (collectively, “Mirada”) filed a lawsuit against Oasis, OPNA and Oasis Midstream Services LLC, seeking monetary damages in excess of $100 million, declaratory relief, attorneys’ fees and costs (Mirada Energy, LLC, et al. v. Oasis Petroleum North America LLC, et al.; in the 334th Judicial District Court of Harris County, Texas; Case Number 2017-19911). Mirada asserts that it is a working interest owner in certain acreage owned and operated by the Company in Wild Basin. Specifically, Mirada asserts that the Company has breached certain agreements by: (1) failing to allow Mirada to participate in the Company’s midstream operations in Wild Basin; (2) refusing to provide Mirada with information that Mirada contends is required under certain agreements and failing to provide information in a timely fashion; (3) failing to consult with Mirada and failing to obtain Mirada’s consent prior to drilling more than one well at a time in Wild Basin; and (4) overstating the estimated costs of proposed well operations in Wild Basin. Mirada seeks a declaratory judgment that the Company be removed as operator in Wild Basin at Mirada’s election and that Mirada be allowed to elect a new operator; certain agreements apply to the Company and Mirada and Wild Basin with respect to this dispute; the Company be required to provide all information within its possession regarding proposed or ongoing operations in Wild Basin; and the Company not be permitted to drill, or propose to drill, more than one well at a time in Wild Basin without obtaining Mirada’s consent. Mirada also seeks a declaratory judgment with respect to the Company’s current midstream operations in Wild Basin. Specifically, Mirada seeks a declaratory judgment that Mirada has a right to participate in the Company’s Wild Basin midstream operations, consisting of produced water disposal, crude oil gathering and natural gas gathering and processing; that, upon Mirada’s election to participate, Mirada is obligated to pay its proportionate costs of the Company’s midstream operations in Wild Basin; and that Mirada would then be entitled to receive a share of revenues from the midstream operations and would not be charged any amount for its use of these facilities for production from the “Contract Area.” On June 30, 2017, Mirada amended its original petition to add a claim that the Company has breached certain agreements by charging Mirada for midstream services provided by its affiliates and to seek a declaratory judgment that Mirada is entitled to be paid its share of total proceeds from the sale of hydrocarbons received by OPNA or any affiliate of OPNA without deductions for midstream services provided by OPNA or its affiliates. On February 2, 2018 and February 16, 2018, Mirada filed a second and third amended petition, respectively. In these filings, Mirada alleged new legal theories for being entitled to enforce the underlying contracts and added Bighorn DevCo LLC, Bobcat DevCo LLC and Beartooth DevCo LLC as defendants, asserting that these entities were created in bad faith in an effort to avoid contractual obligations owed to Mirada. On March 2, 2018, Mirada filed a fourth amended petition that described Mirada’s alleged ownership and assignment of interests in assets purportedly governed by agreements at issue in the lawsuit. On August 31, 2018, Mirada filed a fifth amended petition that added Oasis Midstream Partners LP as a defendant, asserting that it was created in bad faith in an effort to avoid contractual obligations owed to Mirada. The Company believes that Mirada’s claims are without merit, that the Company has complied with its obligations under the applicable agreements and that some of Mirada’s claims are grounded in agreements that do not apply to the Company. The Company filed answers denying all of Mirada’s claims and intends and continues to vigorously defend against Mirada’s claims. On July 2, 2019, Oasis, OPNA, Oasis Midstream Services LLC, Oasis Midstream Partners LP, Bighorn DevCo LLC, Bobcat DevCo LLC and Beartooth DevCo LLC (collectively “Oasis Entities”) counterclaimed against Mirada for a judgment declaring that Oasis Entities are not obligated to purchase, manage, gather, transport, compress, process, market, sell or otherwise handle Mirada’s proportionate share of oil and gas produced from OPNA-operated wells. The counterclaim also seeks attorney’s fees, costs and expenses. Discovery is ongoing, and each of the parties has made a number of procedural filings and motions, and additional filings and motions can be expected over the course of the claim. Trial is scheduled for February 2020. The Company cannot predict or guarantee the ultimate outcome or resolution of such matter. If such matter were to be determined adversely to the Company’s interests, or if the Company were forced to settle such matter for a significant amount, such resolution or settlement could have a material adverse effect on the Company’s business, financial condition, results of operations or cash flows. Such an adverse determination could materially impact the Company’s ability to operate its properties in Wild Basin or develop its identified drilling locations in Wild Basin on its current development schedule. A determination that Mirada has a right to participate in the Company’s midstream operations could materially reduce the interests of the Company in their current assets and future midstream opportunities and related revenues in Wild Basin. In addition, the Company has agreed to indemnify OMP for any losses resulting from this litigation under the omnibus agreement it entered into with OMP at the time of OMP’s initial public offering.

Condensed Consolidating Financi

Condensed Consolidating Financial Information	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidating Financial Information	Condensed Consolidating Financial Information The Notes (see Note 11 — Long-Term Debt) are guaranteed on a senior unsecured basis by the Guarantors, which are 100% owned by the Company. These guarantees are full and unconditional and joint and several among the Guarantors. Certain of the Company’s operating units, including OMP, which is accounted for on a consolidated basis, do not guarantee the Notes (“Non-Guarantor Subsidiaries”). The following financial information reflects consolidating financial information of the parent company, Oasis Petroleum Inc. (“Issuer”), its Guarantors on a combined basis and the Non-Guarantor Subsidiaries on a combined basis, prepared on the equity basis of accounting. The information is presented in accordance with the requirements of Rule 3-10 under the SEC’s Regulation S-X. The financial information may not necessarily be indicative of results of operations, cash flows or financial position had the Guarantors operated as independent entities. The Company has not presented separate financial and narrative information for each of the Guarantors because it believes such financial and narrative information would not provide any additional information that would be material in evaluating the sufficiency of the Guarantors. During the preparation of the condensed consolidating financial information as of and for the three and six months ended June 30, 2019, the Company identified errors primarily relating to the presentation of non-controlling interests and equity in earnings of subsidiaries in the financial information of the Combined Guarantor Subsidiaries and the related intercompany eliminations. • Condensed Consolidating Balance Sheet. As of December 31, 2018, it was determined that (1) in the Issuer's financial information, investment in and advances to subsidiaries and Oasis share of stockholders’ equity were both overstated by $9.6 million, (2) in the Combined Guarantor Subsidiaries financial information, investment in and advances to subsidiaries and non-controlling interests were overstated by $11.1 million and $184.3 million, respectively, and Oasis share of stockholders’ equity was understated by $173.2 million and (3) in the intercompany eliminations financial information, investments in and advances to subsidiaries and non-controlling interests were understated by $20.7 million and $184.3 million, respectively, and Oasis share of stockholders’ equity was overstated by $163.6 million. • Condensed Consolidated Statements of Operations . For the three months ended June 30, 2018, it was determined that equity in earnings of subsidiaries and net income attributable to non-controlling interests were overstated by $6.6 million and $3.9 million, respectively, in the Combined Guarantor Subsidiaries financial information and understated by $6.6 million and $3.9 million, respectively, in the intercompany eliminations financial information. For the six months ended June 30, 2018, it was determined that equity in earnings of subsidiaries and net income attributable to non-controlling interests were overstated by $11.4 million and $7.0 million, respectively, in the Combined Guarantor Subsidiaries financial information and understated by $11.4 million and $7.0 million, respectively, in the intercompany eliminations financial information. • Condensed Consolidated Statement of Cash Flows. For the six months ended June 30, 2018, it was determined that cash paid for distributions to non-controlling interests was understated by $48.9 million in the Combined Guarantor Subsidiaries financial information and overstated by $48.9 million in the intercompany eliminations financial information, with the offsetting impacts in investment in subsidiaries / capital contributions from parent. These errors in the condensed consolidated financial information, which the Company has determined are not material to this disclosure, were all eliminated in consolidation and therefore have no impact on the Company's consolidated financial position, results of operations or cash flows. The Company has revised the condensed consolidating financial information as of December 31, 2018 and for the three and six months ended June 30, 2018 to reflect the correction of these errors. In addition, for the three and six months ended June 30, 2018, the Company has revised the condensed consolidating financial information to reflect the correction of errors related to the manner in which it accounted for certain crude oil purchase and sale arrangements, which had no effect on the Company’s or any of its subsidiaries’ net income (loss). All impacts of this revision are included in the Combined Guarantor Subsidiaries financial information. Please see Note 2 — Summary of Significant Accounting Policies for more information related to this revision.
Condensed Consolidated Financial Information	Condensed Consolidating Balance Sheet June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands, except share data) ASSETS Current assets Cash and cash equivalents $ 144 $ 13,868 $ 6,246 $ — $ 20,258 Accounts receivable, net — 390,094 6,010 — 396,104 Accounts receivable - affiliates 585,473 79,516 80,088 (745,077) — Inventory — 30,056 — — 30,056 Prepaid expenses 273 4,478 1,267 — 6,018 Derivative instruments — 19,089 — — 19,089 Other current assets — 195 — — 195 Total current assets 585,890 537,296 93,611 (745,077) 471,720 Property, plant and equipment Oil and gas properties (successful efforts method) — 9,299,365 — (15,903) 9,283,462 Other property and equipment — 241,456 1,060,379 — 1,301,835 Less: accumulated depreciation, depletion, amortization and impairment — (3,336,023) (80,160) — (3,416,183) Total property, plant and equipment, net — 6,204,798 980,219 (15,903) 7,169,114 Investments in and advances to subsidiaries 4,886,462 367,275 — (5,253,737) — Derivative instruments — 5,636 — — 5,636 Deferred income taxes 243,866 — — (243,866) — Long-term inventory — 13,286 — — 13,286 Operating right-of-use assets — 16,412 3,642 — 20,054 Other assets — 27,093 3,385 — 30,478 Total assets $ 5,716,218 $ 7,171,796 $ 1,080,857 $ (6,258,583) $ 7,710,288 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Accounts payable $ — $ 14,381 $ 774 $ — $ 15,155 Accounts payable - affiliates 44,643 665,561 34,873 (745,077) — Revenues and production taxes payable — 169,786 748 — 170,534 Accrued liabilities 183 258,337 56,930 — 315,450 Accrued interest payable 37,096 312 293 — 37,701 Derivative instruments — 4,445 — — 4,445 Advances from joint interest partners — 4,076 — — 4,076 Current operating lease liabilities — 5,786 2,051 — 7,837 Other current liabilities — 2,620 610 — 3,230 Total current liabilities 81,922 1,125,304 96,279 (745,077) 558,428 Long-term debt 1,957,524 531,000 408,000 — 2,896,524 Deferred income taxes — 552,538 — (243,866) 308,672 Asset retirement obligations — 53,664 1,564 — 55,228 Operating lease liabilities — 16,424 1,597 — 18,021 Other liabilities — 6,404 553 — 6,957 Total liabilities 2,039,446 2,285,334 507,993 (988,943) 3,843,830 Stockholders’ equity Oasis share of stockholders’ equity 3,676,772 4,886,462 257,733 (5,144,195) 3,676,772 Non-controlling interests — — 315,131 (125,445) 189,686 Total stockholders’ equity 3,676,772 4,886,462 572,864 (5,269,640) 3,866,458 Total liabilities and stockholders’ equity $ 5,716,218 $ 7,171,796 $ 1,080,857 $ (6,258,583) $ 7,710,288
Condensed Consolidated Financial Information	Condensed Consolidating Balance Sheet December 31, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands, except share data) ASSETS Current assets Cash and cash equivalents $ 179 $ 15,362 $ 6,649 $ — $ 22,190 Accounts receivable, net — 385,121 2,481 — 387,602 Accounts receivable - affiliates 643,382 76,127 80,805 (800,314) — Inventory — 33,106 22 — 33,128 Prepaid expenses 373 9,206 1,418 — 10,997 Derivative instruments — 99,930 — — 99,930 Intangible assets, net — 125 — — 125 Other current assets — 183 — — 183 Total current assets 643,934 619,160 91,375 (800,314) 554,155 Property, plant and equipment Oil and gas properties (successful efforts method) — 8,923,291 — (11,102) 8,912,189 Other property and equipment — 218,617 933,155 — 1,151,772 Less: accumulated depreciation, depletion, amortization and impairment — (2,974,122) (62,730) — (3,036,852) Total property, plant and equipment, net — 6,167,786 870,425 (11,102) 7,027,109 Investments in and advances to subsidiaries 4,900,528 356,039 — (5,256,567) — Derivative instruments — 6,945 — — 6,945 Deferred income taxes 219,670 — — (219,670) — Long-term inventory — 12,260 — — 12,260 Other assets — 23,221 2,452 — 25,673 Total assets $ 5,764,132 $ 7,185,411 $ 964,252 $ (6,287,653) $ 7,626,142 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Accounts payable $ — $ 18,567 $ 1,599 $ — $ 20,166 Accounts payable - affiliates 43,113 724,187 33,014 (800,314) — Revenues and production taxes payable — 216,114 581 — 216,695 Accrued liabilities 71 273,923 57,657 — 331,651 Accrued interest payable 37,096 502 442 — 38,040 Derivative instruments — 84 — — 84 Advances from joint interest partners — 5,140 — — 5,140 Total current liabilities 80,280 1,238,517 93,293 (800,314) 611,776 Long-term debt 1,949,276 468,000 318,000 — 2,735,276 Deferred income taxes — 519,725 — (219,670) 300,055 Asset retirement obligations — 50,870 1,514 — 52,384 Derivative instruments — 20 — — 20 Other liabilities — 7,751 — — 7,751 Total liabilities 2,029,556 2,284,883 412,807 (1,019,984) 3,707,262 Stockholders’ equity Oasis share of stockholders’ equity 3,734,576 4,900,528 238,630 (5,139,158) 3,734,576 Non-controlling interests — — 312,815 (128,511) 184,304 Total stockholders’ equity 3,734,576 4,900,528 551,445 (5,267,669) 3,918,880 Total liabilities and stockholders’ equity $ 5,764,132 $ 7,185,411 $ 964,252 $ (6,287,653) $ 7,626,142
Condensed Consolidated Financial Information	Condensed Consolidating Statement of Operations Three Months Ended June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 357,004 $ — $ — $ 357,004 Purchased oil and gas sales — 109,389 — — 109,389 Midstream revenues — 1,082 97,644 (47,153) 51,573 Well services revenues — 11,439 — — 11,439 Total revenues — 478,914 97,644 (47,153) 529,405 Operating expenses Lease operating expenses — 69,362 — (13,134) 56,228 Midstream expenses — 675 28,025 (11,332) 17,368 Well services expenses — 8,474 — — 8,474 Marketing, transportation and gathering expenses — 38,574 — (10,086) 28,488 Purchased oil and gas expenses — 109,662 — — 109,662 Production taxes — 28,142 — — 28,142 Depreciation, depletion and amortization — 173,754 8,562 (4,958) 177,358 Exploration expenses — 887 — — 887 Impairment — 24 — — 24 General and administrative expenses 6,308 21,352 7,809 (4,543) 30,926 Total operating expenses 6,308 450,906 44,396 (44,053) 457,557 Loss on sale of properties — (276) — — (276) Operating income (loss) (6,308) 27,732 53,248 (3,100) 71,572 Other income (expense) Equity in earnings of subsidiaries 73,855 37,518 — (111,373) — Net gain on derivative instruments — 34,749 — — 34,749 Interest expense, net of capitalized interest (32,415) (6,562) (4,209) — (43,186) Other income (expense) 1 282 (4) — 279 Total other income (expense), net 41,441 65,987 (4,213) (111,373) (8,158) Income before income taxes 35,133 93,719 49,035 (114,473) 63,414 Income tax benefit (expense) 7,624 (19,864) — — (12,240) Net income including non-controlling interests 42,757 73,855 49,035 (114,473) 51,174 Less: Net income attributable to non-controlling interests — — 22,837 (14,420) 8,417 Net income attributable to Oasis $ 42,757 $ 73,855 $ 26,198 $ (100,053) $ 42,757
Condensed Consolidated Financial Information	Condensed Consolidating Statement of Operations Three Months Ended June 30, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 397,849 $ — $ — $ 397,849 Purchased oil and gas sales — 128,064 — — 128,064 Midstream revenues — 917 66,558 (38,133) 29,342 Well services revenues — 18,496 — — 18,496 Total revenues — 545,326 66,558 (38,133) 573,751 Operating expenses Lease operating expenses — 57,615 — (13,474) 44,141 Midstream expenses — 780 16,334 (9,426) 7,688 Well services expenses — 13,560 — — 13,560 Marketing, transportation and gathering expenses — 28,653 — (5,820) 22,833 Purchased oil and gas expenses — 129,579 — — 129,579 Production taxes — 34,026 — — 34,026 Depreciation, depletion and amortization — 150,554 6,659 (3,643) 153,570 Exploration expenses — 617 — — 617 Impairment — 384,135 — — 384,135 General and administrative expenses 7,496 17,954 5,897 (3,117) 28,230 Total operating expenses 7,496 817,473 28,890 (35,480) 818,379 Gain on sale of properties — 1,954 — — 1,954 Operating income (loss) (7,496) (270,193) 37,668 (2,653) (242,674) Other income (expense) Equity in earnings (loss) of subsidiaries (278,014) 30,929 — 247,085 — Net loss on derivative instruments — (120,285) — — (120,285) Interest expense, net of capitalized interest (33,135) (7,592) (183) — (40,910) Loss on extinguishment of debt (13,651) — — — (13,651) Other income — 218 — — 218 Total other expense, net (324,800) (96,730) (183) 247,085 (174,628) Income (loss) before income taxes (332,296) (366,923) 37,485 244,432 (417,302) Income tax benefit 12,092 88,909 — — 101,001 Net income (loss) including non-controlling interests (320,204) (278,014) 37,485 244,432 (316,301) Less: Net income attributable to non-controlling interests — — 25,042 (21,139) 3,903 Net income (loss) attributable to Oasis $ (320,204) $ (278,014) $ 12,443 $ 265,571 $ (320,204)
Condensed Consolidated Financial Information	Condensed Consolidating Statement of Operations Six Months Ended June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 725,786 $ — $ — $ 725,786 Purchased oil and gas sales — 257,860 — — 257,860 Midstream revenues — 4,152 189,295 (93,853) 99,594 Well services revenues — 21,897 — — 21,897 Total revenues — 1,009,695 189,295 (93,853) 1,105,137 Operating expenses Lease operating expenses — 141,147 — (26,475) 114,672 Midstream expenses — 2,523 54,940 (23,366) 34,097 Well services expenses — 15,444 — — 15,444 Marketing, transportation and gathering expenses — 83,811 — (20,373) 63,438 Purchased oil and gas expenses — 259,566 — — 259,566 Production taxes — 57,760 — — 57,760 Depreciation, depletion and amortization — 359,823 17,491 (10,123) 367,191 Exploration expenses — 1,717 — — 1,717 Impairment — 653 — — 653 General and administrative expenses 15,395 42,177 16,529 (8,716) 65,385 Total operating expenses 15,395 964,621 88,960 (89,053) 979,923 Loss on sale of properties — (3,198) — — (3,198) Operating income (loss) (15,395) 41,876 100,335 (4,800) 122,016 Other income (expense) Equity in earnings (loss) of subsidiaries (15,637) 72,253 — (56,616) — Net loss on derivative instruments — (82,862) — — (82,862) Interest expense, net of capitalized interest (65,291) (14,406) (7,957) — (87,654) Other income (expense) 1 236 (4) — 233 Total other expense, net (80,927) (24,779) (7,961) (56,616) (170,283) Income (loss) before income taxes (96,322) 17,097 92,374 (61,416) (48,267) Income tax benefit (expense) 24,197 (32,734) — — (8,537) Net income (loss) including non-controlling interests (72,125) (15,637) 92,374 (61,416) (56,804) Less: Net income attributable to non-controlling interests — — 44,633 (29,312) 15,321 Net income (loss) attributable to Oasis $ (72,125) $ (15,637) $ 47,741 $ (32,104) $ (72,125)
Condensed Consolidated Financial Information	Condensed Consolidating Statement of Operations Six Months Ended June 30, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 764,444 $ — $ — $ 764,444 Purchased oil and gas sales — 195,773 — — 195,773 Midstream revenues — 2,067 127,979 (72,782) 57,264 Well services revenues — 30,082 — — 30,082 Total revenues — 992,366 127,979 (72,782) 1,047,563 Operating expenses Lease operating expenses — 113,314 — (24,392) 88,922 Midstream expenses — 1,526 33,450 (19,303) 15,673 Well services expenses — 20,947 — — 20,947 Marketing, transportation and gathering expenses — 55,325 — (11,479) 43,846 Purchased oil and gas expenses — 200,173 — — 200,173 Production taxes — 65,026 — — 65,026 Depreciation, depletion and amortization — 296,781 13,023 (6,969) 302,835 Exploration expenses — 1,386 — — 1,386 Impairment — 384,228 — — 384,228 General and administrative expenses 14,728 35,632 12,047 (6,237) 56,170 Total operating expenses 14,728 1,174,338 58,520 (68,380) 1,179,206 Gain on sale of properties — 1,954 — — 1,954 Operating income (loss) (14,728) (180,018) 69,459 (4,402) (129,689) Other income (expense) Equity in earnings (loss) of subsidiaries (245,850) 57,587 — 188,263 — Net loss on derivative instruments — (191,401) — — (191,401) Interest expense, net of capitalized interest (65,581) (12,030) (445) — (78,056) Loss on extinguishment of debt (13,651) — — — (13,651) Other income — 35 — — 35 Total other expense, net (325,082) (145,809) (445) 188,263 (283,073) Income (loss) before income taxes (339,810) (325,827) 69,014 183,861 (412,762) Income tax benefit 20,196 79,977 — — 100,173 Net income (loss) including non-controlling interests (319,614) (245,850) 69,014 183,861 (312,589) Less: Net income attributable to non-controlling interests — — 46,616 (39,591) 7,025 Net income (loss) attributable to Oasis $ (319,614) $ (245,850) $ 22,398 $ 223,452 $ (319,614)
Condensed Consolidated Financial Information	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands) Cash flows from operating activities: Net income (loss) including non-controlling interests $ (72,125) $ (15,637) $ 92,374 $ (61,416) $ (56,804) Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by operating activities: Equity in earnings (loss) of subsidiaries 15,637 (72,253) — 56,616 — Depreciation, depletion and amortization — 359,823 17,491 (10,123) 367,191 Loss on sale of properties — 3,198 — — 3,198 Impairment — 653 — — 653 Deferred income taxes (24,197) 32,814 — — 8,617 Derivative instruments — 82,862 — — 82,862 Equity-based compensation expenses 13,933 3,772 219 — 17,924 Deferred financing costs amortization and other 8,246 3,582 417 — 12,245 Working capital and other changes: Change in accounts receivable, net 57,909 (13,500) (2,086) (55,237) (12,914) Change in inventory — 3,029 — — 3,029 Change in prepaid expenses 100 3,668 150 — 3,918 Change in accounts payable, interest payable and accrued liabilities 1,643 (97,321) 3,927 55,237 (36,514) Change in other assets and liabilities, net — (4,074) (399) — (4,473) Net cash provided by operating activities 1,146 290,616 112,093 (14,923) 388,932 Cash flows from investing activities: Capital expenditures — (394,675) (130,826) — (525,501) Acquisitions — (5,781) — — (5,781) Derivative settlements — 3,629 — — 3,629 Net cash used in investing activities — (396,827) (130,826) — (527,653) Cash flows from financing activities: Proceeds from Revolving Credit Facilities — 1,083,000 95,000 — 1,178,000 Principal payments on Revolving Credit Facilities — (1,020,000) (5,000) — (1,025,000) Deferred financing costs — (42) (440) — (482) Purchases of treasury stock (4,305) — — — (4,305) Distributions to non-controlling interests — — (43,581) 33,488 (10,093) Investment in subsidiaries / capital contributions from parent 3,124 42,642 (27,201) (18,565) — Other — (883) (448) — (1,331) Net cash provided by (used in) financing activities (1,181) 104,717 18,330 14,923 136,789 Decrease in cash and cash equivalents (35) (1,494) (403) — (1,932) Cash and cash equivalents at beginning of period 179 15,362 6,649 — 22,190 Cash and cash equivalents at end of period $ 144 $ 13,868 $ 6,246 $ — $ 20,258
Condensed Consolidated Financial Information	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands) Cash flows from operating activities: Net income (loss) including non-controlling interests $ (319,614) $ (245,850) $ 69,014 $ 183,861 $ (312,589) Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by operating activities: Equity in earnings (loss) of subsidiaries 245,850 (57,587) — (188,263) — Depreciation, depletion and amortization — 296,781 13,023 (6,969) 302,835 Loss on extinguishment of debt 13,651 — — — 13,651 Gain on sale of properties — (1,954) — — (1,954) Impairment — 384,228 — — 384,228 Deferred income taxes (20,196) (80,097) — — (100,293) Derivative instruments — 191,401 — — 191,401 Equity-based compensation expenses 13,340 624 166 — 14,130 Deferred financing costs amortization and other 7,892 2,522 104 — 10,518 Working capital and other changes: Change in accounts receivable, net 96,993 (8,178) 29,407 (124,088) (5,866) Change in inventory — (4,629) (92) — (4,721) Change in prepaid expenses 58 95 420 — 573 Change in accounts payable, interest payable and accrued liabilities 3,335 (90,679) 4,105 124,088 40,849 Change in other assets and liabilities, net — (746) — — (746) Net cash provided by operating activities 41,309 385,931 116,147 (11,371) 532,016 Cash flows from investing activities: Capital expenditures — (381,971) (154,988) — (536,959) Acquisitions — (524,255) — — (524,255) Proceeds from sale of properties — 2,236 — — 2,236 Derivative settlements — (96,823) — — (96,823) Other — (933) — — (933) Net cash used in investing activities — (1,001,746) (154,988) — (1,156,734) Cash flows from financing activities: Proceeds from Revolving Credit Facilities — 1,820,000 113,000 — 1,933,000 Principal payments on Revolving Credit Facilities — (1,239,000) (26,000) — (1,265,000) Repurchase of senior unsecured notes (423,143) — — — (423,143) Proceeds from issuance of senior unsecured convertible notes 400,000 — — — 400,000 Deferred financing costs (6,524) (266) — — (6,790) Purchases of treasury stock (6,064) — — — (6,064) Distributions to non-controlling interests — — (55,757) 48,911 (6,846) Investment in subsidiaries / capital contributions from parent (5,619) 33,695 9,464 (37,540) — Other 38 (125) — — (87) Net cash provided by (used in) financing activities (41,312) 614,304 40,707 11,371 625,070 Increase (decrease) in cash and cash equivalents (3) (1,511) 1,866 — 352 Cash and cash equivalents at beginning of period 178 15,659 883 — 16,720 Cash and cash equivalents at end of period $ 175 $ 14,148 $ 2,749 $ — $ 17,072

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	Subsequent EventsThe Company has evaluated the period after the balance sheet date, noting no subsequent events or transactions that required recognition or disclosure in the financial statements, other than as previously disclosed.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying condensed consolidated financial statements of the Company have not been audited by the Company’s independent registered public accounting firm, except that the Condensed Consolidated Balance Sheet at December 31, 2018 is derived from audited financial statements. Certain reclassifications of prior year balances have been made to conform such amounts to current year classifications. These reclassifications have no impact on net income. In the opinion of management, all adjustments, consisting of normal recurring adjustments necessary for the fair statement of the Company’s financial position, have been included. Management has made certain estimates and assumptions that affect reported amounts in the condensed consolidated financial statements and disclosures of contingencies. Actual results may differ from those estimates. The results for interim periods are not necessarily indicative of annual results. These interim financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain disclosures have been condensed or omitted from these financial statements. Accordingly, they do not include all of the information and notes required by accounting principles generally accepted in the United States of America (“GAAP”) for complete consolidated financial statements and should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (“2018 Annual Report”).
Consolidation	Consolidation. The accompanying condensed consolidated financial statements of the Company include the accounts of Oasis, the accounts of wholly-owned subsidiaries and the accounts of OMP and its general partner, OMP GP LLC (“OMP GP”). The Company has determined that the partners with equity at risk in OMP lack the authority, through voting rights or similar rights, to direct the activities that most significantly impact OMP’s economic performance. Therefore, as the limited partners of OMP do not have substantive kick-out or substantive participating rights over OMP GP, OMP is a variable interest entity. Through the Company’s ownership interest in OMP GP, the Company has the authority to direct the activities that most significantly affect economic performance and the right to receive benefits that could be potentially significant to OMP. Therefore, the Company is considered the primary beneficiary and consolidates OMP and records a non-controlling interest for the interest owned by the public. All intercompany balances and transactions have been eliminated upon consolidation.
Revision of prior Period Financial Statements	Revision of Prior Period Financial Statements. In connection with the preparation of the Company’s 2018 Annual Report, the Company identified errors in its previously issued 2017 annual consolidated financial statements and in each of the interim periods within 2018 and 2017. These prior period errors related to the manner in which it accounted for certain crude oil purchase and sale arrangements. Specifically, although the Company previously reported the transactions on a net basis, the Company was required to account for these purchase and sale arrangements on a gross basis, in accordance with Accounting Standards Codification 606, Revenue from Contracts with Customers (“ASC 606”) in 2018 , as these transactions were not subject to Accounting Standards Codification 845, Nonmonetary Transactions (“ASC 845”). The correction of these errors had no effect on the reported consolidated net income (loss) attributable to Oasis or earnings (loss) attributable to Oasis per share data. In accordance with Staff Accounting Bulletin (“SAB”) No. 99, Materiality , and SAB No. 108, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements , the Company evaluated the errors and, based on an analysis of quantitative and qualitative factors, determined that the related impact was not material to the Company’s consolidated financial statements for any prior period. Therefore, amendments of previously filed reports are not required. In accordance with Accounting Standards Codification 250, Accounting Changes and Error Corrections , the Company has corrected the errors for the three and six months ended June 30, 2018 by revising the unaudited condensed consolidated financial statements appearing herein.
Dividends	Dividends The Company has not paid any cash dividends since its inception. Covenants contained in its revolving credit facilities and the indentures governing the Company’s senior notes restrict the payment of cash dividends on its common stock. The Company currently intends to retain all earnings for the development of its business and for repayment of outstanding debt, and the Company does not anticipate declaring or paying any cash dividends to holders of its common stock.
Risks and Uncertainties	Risks and Uncertainties As a crude oil and natural gas producer, the Company’s revenue, profitability and future growth are substantially dependent upon the prevailing and future prices for crude oil and natural gas, which are dependent upon numerous factors beyond its control such as economic, political and regulatory developments and competition from other energy sources. The energy markets have historically been very volatile, and there can be no assurance that crude oil and natural gas prices will not be subject to wide fluctuations in the future. A substantial or extended decline in prices for crude oil and, to a lesser extent, natural gas could have a material adverse effect on the Company’s financial position, results of operations, cash flows and quantities of crude oil and natural gas reserves that may be economically produced.
Leases	Leases. In February 2016, the FASB issued Accounting Standards Update No. 2016-02, Leases (Topic 842) , which requires lessees to recognize a right-of-use (“ROU”) asset and related liability on the balance sheet for leases with durations greater than twelve months and also requires certain quantitative and qualitative disclosures about leasing arrangements. Accounting Standards Codification 842, Leases (“ASC 842”), was subsequently amended by various Accounting Standards Updates, which provided additional implementation guidance. The Company adopted the new standard as of January 1, 2019 using the required modified retrospective approach and elected the option to recognize a cumulative effect adjustment of initially applying the guidance to the opening balance of retained earnings in the period of adoption. Prior period amounts were not adjusted. The Company elected the package of practical expedients under the transition guidance within the new standard, including the practical expedient to not reassess under the new standard any prior conclusions about lease identification, lease classification and initial direct costs; the use-of hindsight practical expedient; the practical expedient to not reassess the prior accounting treatment for existing or expired land easements; and the practical expedient pertaining to combining lease and non-lease components for all asset classes. In addition, the Company elected not to apply the recognition requirements of ASC 842 to leases with terms of one year or less, and as such, recognition of lease payments for short-term leases are recognized in net income on a straight line basis. See Note 17 — Leases for the adoption impact and disclosures required by ASC 842.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Financial Instruments. In August 2018, the FASB issued Accounting Standards Update No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement (“ASU 2018-13”), which improves the effectiveness of the disclosure requirements for fair value measurements. The changes affect all companies
Inventory	Inventory, including long-term inventory, is stated at the lower of cost and net realizable value with cost determined on an average cost method. The Company assesses the carrying value of inventory and uses estimates and judgment when making any adjustments necessary to reduce the carrying value to net realizable value. Among the uncertainties that impact the Company’s estimates are the applicable quality and location differentials to include in the Company’s net realizable value analysis. Additionally, the Company estimates the upcoming liquidation timing of the inventory. Changes in assumptions made as to the timing of a sale can materially impact net realizable value.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Impacts of Revisions to the Company’s Condensed Consolidated Statement of Operations	For the three and six months ended June 30, 2018, the revision did not impact the Company’s financial position or cash flows from operations, and the impacts to the Company’s Condensed Consolidated Statement of Operations were as follows: Three Months Ended June 30, 2018 Six Months Ended June 30, 2018 As Reported Revision As Revised As Reported Revision As Revised (In thousands, except per share data) Oil and gas revenues $ 395,921 $ 1,928 $ 397,849 $ 759,592 $ 4,852 $ 764,444 Purchased oil and gas sales 57,578 70,486 128,064 75,615 120,158 195,773 Total revenues 501,337 72,414 573,751 922,553 125,010 1,047,563 Purchased oil and gas expenses 57,165 72,414 129,579 75,163 125,010 200,173 Total operating expenses 745,965 72,414 818,379 1,054,196 125,010 1,179,206 Net loss attributable to Oasis (320,204) — (320,204) (319,614) — (319,614) Loss attributable to Oasis per share: Basic $ (1.02) $ — $ (1.02) $ (1.06) $ — $ (1.06) Diluted $ (1.02) $ — $ (1.02) $ (1.06) $ — $ (1.06)

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Remaining Performance Obligation Expected Satisfaction Period	The following table presents estimated revenue allocated to remaining performance obligations for contracted revenues that are unsatisfied (or partially satisfied) as of June 30, 2019: (In thousands) 2019 (excluding the six months ended June 30, 2019) $ 11,189 2020 24,183 2021 27,035 2022 19,262 2023 12,642 Thereafter 14,642 Total $ 108,953
Exploration and Production Revenues
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue	Revenues associated with contracts with customers for crude oil, natural gas and natural gas liquids (“NGL”) sales were as follows for the three and six months ended June 30, 2019 and 2018: Exploration and Production Revenues Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Crude oil revenues $ 327,977 $ 363,182 $ 646,098 $ 689,492 Purchased crude oil sales 106,441 127,212 253,577 194,872 Natural gas revenues 9,734 23,059 41,330 50,021 Purchased natural gas sales 2,920 496 4,255 545 NGL revenues 19,293 11,608 38,358 24,931 Total exploration and production revenues $ 466,365 $ 525,557 $ 983,618 $ 959,861
Midstream Services
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue	Revenues associated with contracts with customers for midstream services under fee-based arrangements and midstream product sales from purchase arrangements were as follows for the three and six months ended June 30, 2019 and 2018: Midstream Revenues (1) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Midstream service revenues Crude oil and natural gas revenues $ 22,875 $ 17,907 $ 47,538 $ 35,936 Produced and flowback water revenues 9,473 9,058 18,506 17,934 Total midstream service revenues $ 32,348 $ 26,965 $ 66,044 $ 53,870 Midstream product revenues Purchased crude oil sales $ 28 $ 356 $ 28 $ 356 Natural gas and NGL revenues 17,319 — 30,116 — Freshwater revenues 1,906 2,377 3,434 3,394 Total midstream product revenues $ 19,253 $ 2,733 $ 33,578 $ 3,750 Total midstream revenues $ 51,601 $ 29,698 $ 99,622 $ 57,620 __________________ (1) Represents midstream revenues, excluding all intercompany revenues for work performed by the midstream services business segment for the Company’s ownership interests that are eliminated in consolidation and are therefore not included in consolidated midstream services revenues.
Well Services
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue	Revenues associated with contracts with customers for well services were as follows for the three and six months ended June 30, 2019 and 2018: Well Services Revenues (1) Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Hydraulic fracturing revenues $ 10,628 $ 17,390 $ 20,403 $ 27,816 Equipment rental revenues 811 1,106 1,494 2,266 Total well services revenues $ 11,439 $ 18,496 $ 21,897 $ 30,082 __________________ (1) Represents well services revenues, excluding all intercompany revenues for work performed by the well services business segment for the Company’s ownership interests that are eliminated in consolidation and are therefore not included in consolidated well services revenues.

Inventory (Tables)

Inventory (Tables)	6 Months Ended
	Jun. 30, 2019
Inventory Disclosure [Abstract]
Components of Inventory	Total inventory consists of the following: June 30, 2019 December 31, 2018 (In thousands) Inventory Crude oil inventory $ 11,923 $ 14,933 Equipment and materials 18,133 18,195 Total inventory $ 30,056 $ 33,128 Long-term inventory Linefill in third party pipelines $ 13,286 $ 12,260 Total long-term inventory $ 13,286 $ 12,260 Total $ 43,342 $ 45,388
Components of Long-term Inventory	Total inventory consists of the following: June 30, 2019 December 31, 2018 (In thousands) Inventory Crude oil inventory $ 11,923 $ 14,933 Equipment and materials 18,133 18,195 Total inventory $ 30,056 $ 33,128 Long-term inventory Linefill in third party pipelines $ 13,286 $ 12,260 Total long-term inventory $ 13,286 $ 12,260 Total $ 43,342 $ 45,388

Accounts Receivable (Tables)

Accounts Receivable (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Schedule of Accounts Receivable	The following table sets forth the Company’s accounts receivable, net: June 30, 2019 December 31, 2018 (In thousands) Trade accounts $ 262,189 $ 245,546 Joint interest accounts 124,395 133,375 Other accounts 11,137 10,207 Total 397,721 389,128 Allowance for doubtful accounts (1,617) (1,526) Total accounts receivable, net $ 396,104 $ 387,602

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Hierarchy of Fair Value, Assets and Liabilities Measured on Recurring Basis	The following tables set forth by level, within the fair value hierarchy, the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis: Fair value at June 30, 2019 Level 1 Level 2 Level 3 Total (In thousands) Assets: Money market funds $ 144 $ — $ — $ 144 Commodity derivative instruments (see Note 8) — 24,725 — 24,725 Total assets $ 144 $ 24,725 $ — $ 24,869 Liabilities: Commodity derivative instruments (see Note 8) $ — $ 4,445 $ — $ 4,445 Total liabilities $ — $ 4,445 $ — $ 4,445 Fair value at December 31, 2018 Level 1 Level 2 Level 3 Total (In thousands) Assets: Money market funds $ 143 $ — $ — $ 143 Commodity derivative instruments (see Note 8) — 106,875 — 106,875 Total assets $ 143 $ 106,875 $ — $ 107,018 Liabilities: Commodity derivative instruments (see Note 8) $ — $ 104 $ — $ 104 Total liabilities $ — $ 104 $ — $ 104

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Outstanding Commodity Derivative Instruments	At June 30, 2019, the Company had the following outstanding commodity derivative instruments: Commodity Settlement Derivative Index Volumes Weighted Average Prices Fair Value Fixed Price Swaps Basis Swaps Sub-Floor Floor Ceiling (In thousands) Crude oil 2019 Fixed price swaps NYMEX WTI 4,000,000 Bbl $ 57.04 $ (3,303) Crude oil 2019 Basis swaps ICE Brent-NYMEX WTI 60,000 Bbl $ 9.68 86 Crude oil 2019 Basis swaps Midland-NYMEX WTI 120,000 Bbl $ (6.71) (740) Crude oil 2019 Basis swaps Houston-NYMEX WTI 366,000 Bbl $ 4.55 90 Crude oil 2019 Two-way collar NYMEX WTI 2,592,000 Bbl $ 57.87 $ 74.22 7,308 Crude oil 2019 Three-way collar NYMEX WTI 2,196,000 Bbl $ 40.14 $ 51.52 $ 65.92 (284) Crude oil 2020 Fixed price swaps NYMEX WTI 2,597,000 Bbl $ 59.30 6,728 Crude oil 2020 Two-way collar NYMEX WTI 434,000 Bbl $ 58.07 $ 74.64 1,835 Crude oil 2020 Three-way collar NYMEX WTI 4,268,000 Bbl $ 40.00 $ 53.49 $ 64.49 4,790 Crude oil 2021 Fixed price swaps NYMEX WTI 93,000 Bbl $ 58.85 357 Crude oil 2021 Three-way collar NYMEX WTI 310,000 Bbl $ 40.00 $ 52.97 $ 63.76 376 Natural gas 2019 Fixed price swaps NYMEX HH 5,520,000 MMBtu $ 2.92 3,037 $ 20,280 Subsequent to June 30, 2019, the Company entered into additional fixed price swaps and two-way and three-way costless collars. As of August 9, 2019, the Company had the following outstanding commodity derivative contracts: Commodity Settlement Derivative Index Volumes Weighted Average Prices Fixed Price Swaps Basis Swaps Sub-Floor Floor Ceiling Crude oil 2019 Fixed price swaps NYMEX WTI 4,122,000 Bbl $ 57.13 Crude oil 2019 Basis swaps ICE Brent-NYMEX WTI 60,000 Bbl $ 9.68 Crude oil 2019 Basis swaps Midland-NYMEX WTI 120,000 Bbl $ (6.71) Crude oil 2019 Basis swaps Houston-NYMEX WTI 366,000 Bbl $ 4.55 Crude oil 2019 Two-way collar NYMEX WTI 2,592,000 Bbl $ 57.87 $ 74.22 Crude oil 2019 Three-way collar NYMEX WTI 2,196,000 Bbl $ 40.14 $ 51.52 $ 65.92 Crude oil 2020 Fixed price swaps NYMEX WTI 2,992,000 Bbl $ 59.05 Crude oil 2020 Two-way collar NYMEX WTI 1,650,000 Bbl $ 53.04 $ 64.95 Crude oil 2020 Three-way collar NYMEX WTI 4,574,000 Bbl $ 40.00 $ 53.26 $ 64.48 Crude oil 2021 Fixed price swaps NYMEX WTI 93,000 Bbl $ 58.85 Crude oil 2021 Two-way collar NYMEX WTI 62,000 Bbl $ 50.50 $ 60.70 Crude oil 2021 Three-way collar NYMEX WTI 734,000 Bbl $ 40.00 $ 51.26 $ 64.05 Natural gas 2019 Fixed price swaps NYMEX HH 5,520,000 MMBtu $ 2.92
Gains and Losses from Commodity Derivative Instruments	The following table summarizes the location and amounts of gains and losses from the Company’s commodity derivative instruments recorded in the Company’s Condensed Consolidated Statements of Operations for the periods presented: Three Months Ended June 30, Six Months Ended June 30, Statements of Operations Location 2019 2018 2019 2018 (In thousands) Net gain (loss) on derivative instruments $ 34,749 $ (120,285) $ (82,862) $ (191,401)
Summary of Gross and Net Information about Commodity Derivative Assets	The following table summarizes the location and fair value of all outstanding commodity derivative instruments recorded in the Company’s Condensed Consolidated Balance Sheets: June 30, 2019 Commodity Balance Sheet Location Gross Recognized Assets/Liabilities Gross Amount Offset Net Recognized Fair Value Assets/ Liabilities (In thousands) Derivatives assets: Commodity contracts Derivative instruments — current assets $ 28,196 $ (9,107) $ 19,089 Commodity contracts Derivative instruments — non-current assets 12,237 (6,601) 5,636 Total derivatives assets $ 40,433 $ (15,708) $ 24,725 Derivatives liabilities: Commodity contracts Derivative instruments — current liabilities $ 11,265 $ (6,820) $ 4,445 Commodity contracts Derivative instruments — non-current liabilities — — — Total derivatives liabilities $ 11,265 $ (6,820) $ 4,445 December 31, 2018 Commodity Balance Sheet Location Gross Recognized Assets/Liabilities Gross Amount Offset Net Recognized Fair Value Assets/Liabilities (In thousands) Derivatives assets: Commodity contracts Derivative instruments — current assets $ 110,729 $ (10,799) $ 99,930 Commodity contracts Derivative instruments — non-current assets 8,251 (1,306) 6,945 Total derivatives assets $ 118,980 $ (12,105) $ 106,875 Derivatives liabilities: Commodity contracts Derivative instruments — current liabilities $ 84 $ — $ 84 Commodity contracts Derivative instruments — non-current liabilities 20 — 20 Total derivatives liabilities $ 104 $ — $ 104
Summary of Gross and Net Information about Commodity Derivative Liabilities	The following table summarizes the location and fair value of all outstanding commodity derivative instruments recorded in the Company’s Condensed Consolidated Balance Sheets: June 30, 2019 Commodity Balance Sheet Location Gross Recognized Assets/Liabilities Gross Amount Offset Net Recognized Fair Value Assets/ Liabilities (In thousands) Derivatives assets: Commodity contracts Derivative instruments — current assets $ 28,196 $ (9,107) $ 19,089 Commodity contracts Derivative instruments — non-current assets 12,237 (6,601) 5,636 Total derivatives assets $ 40,433 $ (15,708) $ 24,725 Derivatives liabilities: Commodity contracts Derivative instruments — current liabilities $ 11,265 $ (6,820) $ 4,445 Commodity contracts Derivative instruments — non-current liabilities — — — Total derivatives liabilities $ 11,265 $ (6,820) $ 4,445 December 31, 2018 Commodity Balance Sheet Location Gross Recognized Assets/Liabilities Gross Amount Offset Net Recognized Fair Value Assets/Liabilities (In thousands) Derivatives assets: Commodity contracts Derivative instruments — current assets $ 110,729 $ (10,799) $ 99,930 Commodity contracts Derivative instruments — non-current assets 8,251 (1,306) 6,945 Total derivatives assets $ 118,980 $ (12,105) $ 106,875 Derivatives liabilities: Commodity contracts Derivative instruments — current liabilities $ 84 $ — $ 84 Commodity contracts Derivative instruments — non-current liabilities 20 — 20 Total derivatives liabilities $ 104 $ — $ 104

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	6 Months Ended
	Jun. 30, 2019
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	The following table sets forth the Company’s property, plant and equipment: June 30, 2019 December 31, 2018 (In thousands) Proved oil and gas properties (1) $ 8,244,667 $ 7,878,104 Less: Accumulated depreciation, depletion, amortization and impairment (3,205,534) (2,853,353) Proved oil and gas properties, net 5,039,133 5,024,751 Unproved oil and gas properties 1,038,795 1,034,085 Other property and equipment (2) 1,301,835 1,151,772 Less: Accumulated depreciation (210,649) (183,499) Other property and equipment, net 1,091,186 968,273 Total property, plant and equipment, net $ 7,169,114 $ 7,027,109 __________________ (1) Included in the Company’s proved oil and gas properties are estimates of future asset retirement costs of $42.2 million and $40.5 million at June 30, 2019 and December 31, 2018, respectively. (2) Included in the Company’s other property and equipment are estimates of future asset retirement costs of $1.4 million and $1.3 million at June 30, 2019 and December 31, 2018, respectively.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	The Company’s long-term debt consists of the following: June 30, 2019 December 31, 2018 (In thousands) Oasis Credit Facility $ 531,000 $ 468,000 OMP Credit Facility 408,000 318,000 Senior unsecured notes 6.50% senior unsecured notes due November 1, 2021 71,835 71,835 6.875% senior unsecured notes due March 15, 2022 901,480 901,480 6.875% senior unsecured notes due January 15, 2023 366,094 366,094 6.25% senior unsecured notes due May 1, 2026 400,000 400,000 2.625% senior unsecured convertible notes due September 15, 2023 300,000 300,000 Total principal of senior unsecured notes 2,039,409 2,039,409 Less: unamortized deferred financing costs on senior unsecured notes (18,507) (20,865) Less: unamortized debt discount on senior unsecured convertible notes (63,378) (69,268) Total long-term debt $ 2,896,524 $ 2,735,276

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	6 Months Ended
	Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Changes in Asset Retirement Obligations	The following table reflects the changes in the Company’s ARO during the six months ended June 30, 2019: (In thousands) Balance at December 31, 2018 $ 52,449 Liabilities incurred during period 1,019 Liabilities settled during period (139) Accretion expense during period (1) 1,928 Revisions to estimates 827 Balance at June 30, 2019 $ 56,084 ___________________ (1) Included in depreciation, depletion and amortization on the Company’s Condensed Consolidated Statements of Operations.

Equity-Based Compensation (Tabl

Equity-Based Compensation (Tables)	6 Months Ended
	Jun. 30, 2019
Share-based Payment Arrangement [Abstract]
Summary of Stock Based Compensation Assumptions	The following assumptions were used for the Monte Carlo model to determine the grant date fair value and associated equity-based compensation expense of the PSUs granted during the six months ended June 30, 2019: Risk-free interest rate 2.55% - 2.56% Oasis volatility 71.17 % Oasis initial value $5.85 Oasis stock price on date of grant $6.63

Earnings (Loss) Per Share (Tabl

Earnings (Loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Schedule of Weighted-Average Number of Shares Outstanding	The following is a calculation of the basic and diluted weighted average shares outstanding for the three and six months ended June 30, 2019 and 2018: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Basic and diluted weighted average common shares outstanding 314,982 313,072 314,724 301,652
Schedule of Common Shares Excluded From Diluted Earnings (Loss) per Share Calculation	The following is a calculation of weighted average common shares excluded from diluted earnings (loss) per share due to the anti-dilutive effect: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (In thousands) Restricted stock awards and PSUs 10,406 7,515 10,369 7,440

Business Segment Information (T

Business Segment Information (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting [Abstract]
Summarized Financial Information of Segments	The following table summarizes financial information for the Company’s three business segments for the periods presented: Exploration and Midstream Services Well Services Eliminations Consolidated (In thousands) Three months ended June 30, 2019: Revenues from non-affiliates $ 466,365 $ 51,601 $ 11,439 $ — $ 529,405 Inter-segment revenues — 67,844 27,842 (95,686) — Total revenues 466,365 119,445 39,281 (95,686) 529,405 Operating income 18,895 55,216 1,487 (4,026) 71,572 Other income (expense), net (3,970) (4,200) 12 — (8,158) Income before income taxes including non-controlling interests $ 14,925 $ 51,016 $ 1,499 $ (4,026) $ 63,414 General and administrative $ 25,761 $ 7,980 $ 6,088 $ (8,903) $ 30,926 Equity-based compensation 8,522 515 527 (653) 8,911 Three months ended June 30, 2018: Revenues from non-affiliates $ 525,557 $ 29,698 $ 18,496 $ — $ 573,751 Inter-segment revenues — 39,710 41,418 (81,128) — Total revenues 525,557 69,408 59,914 (81,128) 573,751 Operating income (loss) (280,090) 37,894 8,028 (8,506) (242,674) Other income (expense), net (174,572) (79) 23 — (174,628) Income (loss) before income taxes including non-controlling interests $ (454,662) $ 37,815 $ 8,051 $ (8,506) $ (417,302) General and administrative $ 23,492 $ 6,079 $ 5,756 $ (7,097) $ 28,230 Equity-based compensation 7,012 409 409 (454) 7,376 Six months ended June 30, 2019: Revenues from non-affiliates $ 983,618 $ 99,622 $ 21,897 $ — $ 1,105,137 Inter-segment revenues — 126,405 50,015 (176,420) — Total revenues 983,618 226,027 71,912 (176,420) 1,105,137 Operating income 20,819 105,022 2,302 (6,127) 122,016 Other income (expense), net (162,352) (7,948) 17 — (170,283) Income (loss) before income taxes including non-controlling interests $ (141,533) $ 97,074 $ 2,319 $ (6,127) $ (48,267) General and administrative $ 53,288 $ 16,841 $ 13,549 $ (18,293) $ 65,385 Equity-based compensation 17,102 980 1,088 (1,246) 17,924 Six months ended June 30, 2018: Revenues from non-affiliates $ 959,861 $ 57,620 $ 30,082 $ — $ 1,047,563 Inter-segment revenues — 76,350 74,721 (151,071) — Total revenues 959,861 133,970 104,803 (151,071) 1,047,563 Operating income (loss) (200,130) 70,132 16,178 (15,869) (129,689) Other expense, net (282,717) (336) (20) — (283,073) Income (loss) before income taxes including non-controlling interests $ (482,847) $ 69,796 $ 16,158 $ (15,869) $ (412,762) General and administrative $ 46,971 $ 12,493 $ 11,647 $ (14,941) $ 56,170 Equity-based compensation 13,463 780 795 (908) 14,130 At June 30, 2019: Property, plant and equipment, net $ 6,336,438 $ 1,024,625 $ 30,792 $ (222,741) $ 7,169,114 Total assets (1) 6,804,705 1,057,033 36,292 (187,742) 7,710,288 At December 31, 2018: Property, plant and equipment, net $ 6,311,566 $ 893,285 $ 38,871 $ (216,613) $ 7,027,109 Total assets (1) 6,838,987 920,619 48,150 (181,614) 7,626,142 ___________________

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Components of lease expense, supplemental cash flow information and non-cash transactions related to Company's leases	The following table sets forth the Company’s components of lease expense: Three Months Ended June 30, 2019 Six Months Ended June 30, 2019 (In thousands) Operating lease costs $ 6,799 $ 18,475 Variable lease costs (1) 3,963 5,003 Short-term lease costs 907 1,370 Finance lease costs: Amortization of ROU assets 650 1,216 Interest on lease liabilities 69 124 Total lease costs $ 12,388 $ 26,188 ___________________ (1) Based on payments made by the Company to lessors for the right to use an underlying asset that vary because of changes in circumstances occurring after the commencement date, other than the passage of time, such as property taxes, operating and maintenance costs.
Maturities of the Company's lease liabilities	As of June 30, 2019, maturities of the Company’s lease liabilities are as follows: Operating Leases Finance Leases (In thousands) 2019 (excluding the six months ended June 30, 2019) $ 6,276 $ 1,440 2020 4,594 2,881 2021 1,680 2,068 2022 2,297 1,298 2023 2,345 234 Thereafter 12,802 684 Total future lease payments $ 29,994 $ 8,605 Less: Imputed interest 4,137 705 Present value of future lease payments $ 25,857 $ 7,900
Maturities of the Company's lease liabilities	As of June 30, 2019, maturities of the Company’s lease liabilities are as follows: Operating Leases Finance Leases (In thousands) 2019 (excluding the six months ended June 30, 2019) $ 6,276 $ 1,440 2020 4,594 2,881 2021 1,680 2,068 2022 2,297 1,298 2023 2,345 234 Thereafter 12,802 684 Total future lease payments $ 29,994 $ 8,605 Less: Imputed interest 4,137 705 Present value of future lease payments $ 25,857 $ 7,900
Schedule of future minimum annual rental commitments	As of December 31, 2018, future minimum annual rental commitments under non-cancelable leases under ASC 840 were as follows: (In thousands) 2019 $ 8,723 2020 7,009 2021 6,005 2022 5,130 2023 4,361 Thereafter 13,134 Total future minimum lease payments $ 44,362
Supplemental balance sheet information	Supplemental balance sheet information related to the Company’s leases are as follows: Balance Sheet Location June 30, 2019 (In thousands) Assets Operating lease assets Operating right-of-use assets $ 20,054 Finance lease assets (1) Other assets 7,900 Total lease assets $ 27,954 Liabilities Current Operating lease liabilities Current operating lease liabilities $ 7,837 Finance lease liabilities Other current liabilities 2,626 Long-term Operating lease liabilities Operating lease liabilities 18,021 Finance lease liabilities Other liabilities 5,247 Total lease liabilities $ 33,731 ___________________ (1) Finance lease ROU assets are recorded net of accumulated amortization of $1.2 million as of June 30, 2019.
Schedule of supplemental cash flow information	Supplemental cash flow information and non-cash transactions related to the Company’s leases are as follows: June 30, 2019 (In thousands) Cash paid for amounts included in the measurement of lease liabilities Operating cash flows from operating leases $ 16,696 Operating cash flows from finance leases 124 Financing cash flows from finance leases 941 ROU assets obtained in exchange for lease obligations Operating leases $ 6,803 Finance leases 3,174
Weighted-average remaining lease term and discount rate for the Company’s leases	Weighted-average remaining lease term and discount rate for the Company’s leases are as follows: As of June 30, 2019 Operating Leases Weighted average remaining lease term 7.1 years Weighted average discount rate 4.0 % Finance Leases Weighted average remaining lease term 4.1 years Weighted average discount rate 3.8 %

Condensed Consolidating Finan_2

Condensed Consolidating Financial Information (Tables)	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheet June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands, except share data) ASSETS Current assets Cash and cash equivalents $ 144 $ 13,868 $ 6,246 $ — $ 20,258 Accounts receivable, net — 390,094 6,010 — 396,104 Accounts receivable - affiliates 585,473 79,516 80,088 (745,077) — Inventory — 30,056 — — 30,056 Prepaid expenses 273 4,478 1,267 — 6,018 Derivative instruments — 19,089 — — 19,089 Other current assets — 195 — — 195 Total current assets 585,890 537,296 93,611 (745,077) 471,720 Property, plant and equipment Oil and gas properties (successful efforts method) — 9,299,365 — (15,903) 9,283,462 Other property and equipment — 241,456 1,060,379 — 1,301,835 Less: accumulated depreciation, depletion, amortization and impairment — (3,336,023) (80,160) — (3,416,183) Total property, plant and equipment, net — 6,204,798 980,219 (15,903) 7,169,114 Investments in and advances to subsidiaries 4,886,462 367,275 — (5,253,737) — Derivative instruments — 5,636 — — 5,636 Deferred income taxes 243,866 — — (243,866) — Long-term inventory — 13,286 — — 13,286 Operating right-of-use assets — 16,412 3,642 — 20,054 Other assets — 27,093 3,385 — 30,478 Total assets $ 5,716,218 $ 7,171,796 $ 1,080,857 $ (6,258,583) $ 7,710,288 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Accounts payable $ — $ 14,381 $ 774 $ — $ 15,155 Accounts payable - affiliates 44,643 665,561 34,873 (745,077) — Revenues and production taxes payable — 169,786 748 — 170,534 Accrued liabilities 183 258,337 56,930 — 315,450 Accrued interest payable 37,096 312 293 — 37,701 Derivative instruments — 4,445 — — 4,445 Advances from joint interest partners — 4,076 — — 4,076 Current operating lease liabilities — 5,786 2,051 — 7,837 Other current liabilities — 2,620 610 — 3,230 Total current liabilities 81,922 1,125,304 96,279 (745,077) 558,428 Long-term debt 1,957,524 531,000 408,000 — 2,896,524 Deferred income taxes — 552,538 — (243,866) 308,672 Asset retirement obligations — 53,664 1,564 — 55,228 Operating lease liabilities — 16,424 1,597 — 18,021 Other liabilities — 6,404 553 — 6,957 Total liabilities 2,039,446 2,285,334 507,993 (988,943) 3,843,830 Stockholders’ equity Oasis share of stockholders’ equity 3,676,772 4,886,462 257,733 (5,144,195) 3,676,772 Non-controlling interests — — 315,131 (125,445) 189,686 Total stockholders’ equity 3,676,772 4,886,462 572,864 (5,269,640) 3,866,458 Total liabilities and stockholders’ equity $ 5,716,218 $ 7,171,796 $ 1,080,857 $ (6,258,583) $ 7,710,288
Condensed Consolidating Balance Sheet	Condensed Consolidating Balance Sheet December 31, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands, except share data) ASSETS Current assets Cash and cash equivalents $ 179 $ 15,362 $ 6,649 $ — $ 22,190 Accounts receivable, net — 385,121 2,481 — 387,602 Accounts receivable - affiliates 643,382 76,127 80,805 (800,314) — Inventory — 33,106 22 — 33,128 Prepaid expenses 373 9,206 1,418 — 10,997 Derivative instruments — 99,930 — — 99,930 Intangible assets, net — 125 — — 125 Other current assets — 183 — — 183 Total current assets 643,934 619,160 91,375 (800,314) 554,155 Property, plant and equipment Oil and gas properties (successful efforts method) — 8,923,291 — (11,102) 8,912,189 Other property and equipment — 218,617 933,155 — 1,151,772 Less: accumulated depreciation, depletion, amortization and impairment — (2,974,122) (62,730) — (3,036,852) Total property, plant and equipment, net — 6,167,786 870,425 (11,102) 7,027,109 Investments in and advances to subsidiaries 4,900,528 356,039 — (5,256,567) — Derivative instruments — 6,945 — — 6,945 Deferred income taxes 219,670 — — (219,670) — Long-term inventory — 12,260 — — 12,260 Other assets — 23,221 2,452 — 25,673 Total assets $ 5,764,132 $ 7,185,411 $ 964,252 $ (6,287,653) $ 7,626,142 LIABILITIES AND STOCKHOLDERS’ EQUITY Current liabilities Accounts payable $ — $ 18,567 $ 1,599 $ — $ 20,166 Accounts payable - affiliates 43,113 724,187 33,014 (800,314) — Revenues and production taxes payable — 216,114 581 — 216,695 Accrued liabilities 71 273,923 57,657 — 331,651 Accrued interest payable 37,096 502 442 — 38,040 Derivative instruments — 84 — — 84 Advances from joint interest partners — 5,140 — — 5,140 Total current liabilities 80,280 1,238,517 93,293 (800,314) 611,776 Long-term debt 1,949,276 468,000 318,000 — 2,735,276 Deferred income taxes — 519,725 — (219,670) 300,055 Asset retirement obligations — 50,870 1,514 — 52,384 Derivative instruments — 20 — — 20 Other liabilities — 7,751 — — 7,751 Total liabilities 2,029,556 2,284,883 412,807 (1,019,984) 3,707,262 Stockholders’ equity Oasis share of stockholders’ equity 3,734,576 4,900,528 238,630 (5,139,158) 3,734,576 Non-controlling interests — — 312,815 (128,511) 184,304 Total stockholders’ equity 3,734,576 4,900,528 551,445 (5,267,669) 3,918,880 Total liabilities and stockholders’ equity $ 5,764,132 $ 7,185,411 $ 964,252 $ (6,287,653) $ 7,626,142
Condensed Consolidating Statement of Operations	Condensed Consolidating Statement of Operations Three Months Ended June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 357,004 $ — $ — $ 357,004 Purchased oil and gas sales — 109,389 — — 109,389 Midstream revenues — 1,082 97,644 (47,153) 51,573 Well services revenues — 11,439 — — 11,439 Total revenues — 478,914 97,644 (47,153) 529,405 Operating expenses Lease operating expenses — 69,362 — (13,134) 56,228 Midstream expenses — 675 28,025 (11,332) 17,368 Well services expenses — 8,474 — — 8,474 Marketing, transportation and gathering expenses — 38,574 — (10,086) 28,488 Purchased oil and gas expenses — 109,662 — — 109,662 Production taxes — 28,142 — — 28,142 Depreciation, depletion and amortization — 173,754 8,562 (4,958) 177,358 Exploration expenses — 887 — — 887 Impairment — 24 — — 24 General and administrative expenses 6,308 21,352 7,809 (4,543) 30,926 Total operating expenses 6,308 450,906 44,396 (44,053) 457,557 Loss on sale of properties — (276) — — (276) Operating income (loss) (6,308) 27,732 53,248 (3,100) 71,572 Other income (expense) Equity in earnings of subsidiaries 73,855 37,518 — (111,373) — Net gain on derivative instruments — 34,749 — — 34,749 Interest expense, net of capitalized interest (32,415) (6,562) (4,209) — (43,186) Other income (expense) 1 282 (4) — 279 Total other income (expense), net 41,441 65,987 (4,213) (111,373) (8,158) Income before income taxes 35,133 93,719 49,035 (114,473) 63,414 Income tax benefit (expense) 7,624 (19,864) — — (12,240) Net income including non-controlling interests 42,757 73,855 49,035 (114,473) 51,174 Less: Net income attributable to non-controlling interests — — 22,837 (14,420) 8,417 Net income attributable to Oasis $ 42,757 $ 73,855 $ 26,198 $ (100,053) $ 42,757
Condensed Consolidating Statement of Operations	Condensed Consolidating Statement of Operations Three Months Ended June 30, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 397,849 $ — $ — $ 397,849 Purchased oil and gas sales — 128,064 — — 128,064 Midstream revenues — 917 66,558 (38,133) 29,342 Well services revenues — 18,496 — — 18,496 Total revenues — 545,326 66,558 (38,133) 573,751 Operating expenses Lease operating expenses — 57,615 — (13,474) 44,141 Midstream expenses — 780 16,334 (9,426) 7,688 Well services expenses — 13,560 — — 13,560 Marketing, transportation and gathering expenses — 28,653 — (5,820) 22,833 Purchased oil and gas expenses — 129,579 — — 129,579 Production taxes — 34,026 — — 34,026 Depreciation, depletion and amortization — 150,554 6,659 (3,643) 153,570 Exploration expenses — 617 — — 617 Impairment — 384,135 — — 384,135 General and administrative expenses 7,496 17,954 5,897 (3,117) 28,230 Total operating expenses 7,496 817,473 28,890 (35,480) 818,379 Gain on sale of properties — 1,954 — — 1,954 Operating income (loss) (7,496) (270,193) 37,668 (2,653) (242,674) Other income (expense) Equity in earnings (loss) of subsidiaries (278,014) 30,929 — 247,085 — Net loss on derivative instruments — (120,285) — — (120,285) Interest expense, net of capitalized interest (33,135) (7,592) (183) — (40,910) Loss on extinguishment of debt (13,651) — — — (13,651) Other income — 218 — — 218 Total other expense, net (324,800) (96,730) (183) 247,085 (174,628) Income (loss) before income taxes (332,296) (366,923) 37,485 244,432 (417,302) Income tax benefit 12,092 88,909 — — 101,001 Net income (loss) including non-controlling interests (320,204) (278,014) 37,485 244,432 (316,301) Less: Net income attributable to non-controlling interests — — 25,042 (21,139) 3,903 Net income (loss) attributable to Oasis $ (320,204) $ (278,014) $ 12,443 $ 265,571 $ (320,204)
Condensed Consolidating Statement of Operations	Condensed Consolidating Statement of Operations Six Months Ended June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 725,786 $ — $ — $ 725,786 Purchased oil and gas sales — 257,860 — — 257,860 Midstream revenues — 4,152 189,295 (93,853) 99,594 Well services revenues — 21,897 — — 21,897 Total revenues — 1,009,695 189,295 (93,853) 1,105,137 Operating expenses Lease operating expenses — 141,147 — (26,475) 114,672 Midstream expenses — 2,523 54,940 (23,366) 34,097 Well services expenses — 15,444 — — 15,444 Marketing, transportation and gathering expenses — 83,811 — (20,373) 63,438 Purchased oil and gas expenses — 259,566 — — 259,566 Production taxes — 57,760 — — 57,760 Depreciation, depletion and amortization — 359,823 17,491 (10,123) 367,191 Exploration expenses — 1,717 — — 1,717 Impairment — 653 — — 653 General and administrative expenses 15,395 42,177 16,529 (8,716) 65,385 Total operating expenses 15,395 964,621 88,960 (89,053) 979,923 Loss on sale of properties — (3,198) — — (3,198) Operating income (loss) (15,395) 41,876 100,335 (4,800) 122,016 Other income (expense) Equity in earnings (loss) of subsidiaries (15,637) 72,253 — (56,616) — Net loss on derivative instruments — (82,862) — — (82,862) Interest expense, net of capitalized interest (65,291) (14,406) (7,957) — (87,654) Other income (expense) 1 236 (4) — 233 Total other expense, net (80,927) (24,779) (7,961) (56,616) (170,283) Income (loss) before income taxes (96,322) 17,097 92,374 (61,416) (48,267) Income tax benefit (expense) 24,197 (32,734) — — (8,537) Net income (loss) including non-controlling interests (72,125) (15,637) 92,374 (61,416) (56,804) Less: Net income attributable to non-controlling interests — — 44,633 (29,312) 15,321 Net income (loss) attributable to Oasis $ (72,125) $ (15,637) $ 47,741 $ (32,104) $ (72,125)
Condensed Consolidating Statement of Operations	Condensed Consolidating Statement of Operations Six Months Ended June 30, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands) Revenues Oil and gas revenues $ — $ 764,444 $ — $ — $ 764,444 Purchased oil and gas sales — 195,773 — — 195,773 Midstream revenues — 2,067 127,979 (72,782) 57,264 Well services revenues — 30,082 — — 30,082 Total revenues — 992,366 127,979 (72,782) 1,047,563 Operating expenses Lease operating expenses — 113,314 — (24,392) 88,922 Midstream expenses — 1,526 33,450 (19,303) 15,673 Well services expenses — 20,947 — — 20,947 Marketing, transportation and gathering expenses — 55,325 — (11,479) 43,846 Purchased oil and gas expenses — 200,173 — — 200,173 Production taxes — 65,026 — — 65,026 Depreciation, depletion and amortization — 296,781 13,023 (6,969) 302,835 Exploration expenses — 1,386 — — 1,386 Impairment — 384,228 — — 384,228 General and administrative expenses 14,728 35,632 12,047 (6,237) 56,170 Total operating expenses 14,728 1,174,338 58,520 (68,380) 1,179,206 Gain on sale of properties — 1,954 — — 1,954 Operating income (loss) (14,728) (180,018) 69,459 (4,402) (129,689) Other income (expense) Equity in earnings (loss) of subsidiaries (245,850) 57,587 — 188,263 — Net loss on derivative instruments — (191,401) — — (191,401) Interest expense, net of capitalized interest (65,581) (12,030) (445) — (78,056) Loss on extinguishment of debt (13,651) — — — (13,651) Other income — 35 — — 35 Total other expense, net (325,082) (145,809) (445) 188,263 (283,073) Income (loss) before income taxes (339,810) (325,827) 69,014 183,861 (412,762) Income tax benefit 20,196 79,977 — — 100,173 Net income (loss) including non-controlling interests (319,614) (245,850) 69,014 183,861 (312,589) Less: Net income attributable to non-controlling interests — — 46,616 (39,591) 7,025 Net income (loss) attributable to Oasis $ (319,614) $ (245,850) $ 22,398 $ 223,452 $ (319,614)
Condensed Consolidating Statement of Cash Flows	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2019 Parent/ Combined Combined Intercompany Consolidated (In thousands) Cash flows from operating activities: Net income (loss) including non-controlling interests $ (72,125) $ (15,637) $ 92,374 $ (61,416) $ (56,804) Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by operating activities: Equity in earnings (loss) of subsidiaries 15,637 (72,253) — 56,616 — Depreciation, depletion and amortization — 359,823 17,491 (10,123) 367,191 Loss on sale of properties — 3,198 — — 3,198 Impairment — 653 — — 653 Deferred income taxes (24,197) 32,814 — — 8,617 Derivative instruments — 82,862 — — 82,862 Equity-based compensation expenses 13,933 3,772 219 — 17,924 Deferred financing costs amortization and other 8,246 3,582 417 — 12,245 Working capital and other changes: Change in accounts receivable, net 57,909 (13,500) (2,086) (55,237) (12,914) Change in inventory — 3,029 — — 3,029 Change in prepaid expenses 100 3,668 150 — 3,918 Change in accounts payable, interest payable and accrued liabilities 1,643 (97,321) 3,927 55,237 (36,514) Change in other assets and liabilities, net — (4,074) (399) — (4,473) Net cash provided by operating activities 1,146 290,616 112,093 (14,923) 388,932 Cash flows from investing activities: Capital expenditures — (394,675) (130,826) — (525,501) Acquisitions — (5,781) — — (5,781) Derivative settlements — 3,629 — — 3,629 Net cash used in investing activities — (396,827) (130,826) — (527,653) Cash flows from financing activities: Proceeds from Revolving Credit Facilities — 1,083,000 95,000 — 1,178,000 Principal payments on Revolving Credit Facilities — (1,020,000) (5,000) — (1,025,000) Deferred financing costs — (42) (440) — (482) Purchases of treasury stock (4,305) — — — (4,305) Distributions to non-controlling interests — — (43,581) 33,488 (10,093) Investment in subsidiaries / capital contributions from parent 3,124 42,642 (27,201) (18,565) — Other — (883) (448) — (1,331) Net cash provided by (used in) financing activities (1,181) 104,717 18,330 14,923 136,789 Decrease in cash and cash equivalents (35) (1,494) (403) — (1,932) Cash and cash equivalents at beginning of period 179 15,362 6,649 — 22,190 Cash and cash equivalents at end of period $ 144 $ 13,868 $ 6,246 $ — $ 20,258
Condensed Consolidating Statement of Cash Flows	Condensed Consolidating Statement of Cash Flows Six Months Ended June 30, 2018 Parent/ Combined Combined Intercompany Consolidated (In thousands) Cash flows from operating activities: Net income (loss) including non-controlling interests $ (319,614) $ (245,850) $ 69,014 $ 183,861 $ (312,589) Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by operating activities: Equity in earnings (loss) of subsidiaries 245,850 (57,587) — (188,263) — Depreciation, depletion and amortization — 296,781 13,023 (6,969) 302,835 Loss on extinguishment of debt 13,651 — — — 13,651 Gain on sale of properties — (1,954) — — (1,954) Impairment — 384,228 — — 384,228 Deferred income taxes (20,196) (80,097) — — (100,293) Derivative instruments — 191,401 — — 191,401 Equity-based compensation expenses 13,340 624 166 — 14,130 Deferred financing costs amortization and other 7,892 2,522 104 — 10,518 Working capital and other changes: Change in accounts receivable, net 96,993 (8,178) 29,407 (124,088) (5,866) Change in inventory — (4,629) (92) — (4,721) Change in prepaid expenses 58 95 420 — 573 Change in accounts payable, interest payable and accrued liabilities 3,335 (90,679) 4,105 124,088 40,849 Change in other assets and liabilities, net — (746) — — (746) Net cash provided by operating activities 41,309 385,931 116,147 (11,371) 532,016 Cash flows from investing activities: Capital expenditures — (381,971) (154,988) — (536,959) Acquisitions — (524,255) — — (524,255) Proceeds from sale of properties — 2,236 — — 2,236 Derivative settlements — (96,823) — — (96,823) Other — (933) — — (933) Net cash used in investing activities — (1,001,746) (154,988) — (1,156,734) Cash flows from financing activities: Proceeds from Revolving Credit Facilities — 1,820,000 113,000 — 1,933,000 Principal payments on Revolving Credit Facilities — (1,239,000) (26,000) — (1,265,000) Repurchase of senior unsecured notes (423,143) — — — (423,143) Proceeds from issuance of senior unsecured convertible notes 400,000 — — — 400,000 Deferred financing costs (6,524) (266) — — (6,790) Purchases of treasury stock (6,064) — — — (6,064) Distributions to non-controlling interests — — (55,757) 48,911 (6,846) Investment in subsidiaries / capital contributions from parent (5,619) 33,695 9,464 (37,540) — Other 38 (125) — — (87) Net cash provided by (used in) financing activities (41,312) 614,304 40,707 11,371 625,070 Increase (decrease) in cash and cash equivalents (3) (1,511) 1,866 — 352 Cash and cash equivalents at beginning of period 178 15,659 883 — 16,720 Cash and cash equivalents at end of period $ 175 $ 14,148 $ 2,749 $ — $ 17,072

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Impacts of Revisions to the Company’s Condensed Consolidated Statement of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues	$ 529,405	$ 573,751	$ 1,105,137	$ 1,047,563
Total operating expenses	457,557	818,379	979,923	1,179,206
Net loss attributable to Oasis	$ 42,757	$ (320,204)	$ (72,125)	$ (319,614)
Basic (in dollars per share)		$ (1.02)	$ (0.23)	$ (1.06)
Diluted (in dollars per share)		$ (1.02)	$ (0.23)	$ (1.06)
As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues		$ 501,337		$ 922,553
Total operating expenses		745,965		1,054,196
Net loss attributable to Oasis		$ (320,204)		$ (319,614)
Basic (in dollars per share)	$ 0.14	$ (1.02)		$ (1.06)
Diluted (in dollars per share)	$ 0.14	$ (1.02)		$ (1.06)
Revision
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues		$ 72,414		$ 125,010
Total operating expenses		72,414		125,010
Net loss attributable to Oasis		$ 0		$ 0
Basic (in dollars per share)		$ 0		$ 0
Diluted (in dollars per share)		$ 0		$ 0
Oil and gas revenues
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues	$ 357,004	$ 397,849	$ 725,786	$ 764,444
Oil and gas revenues | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues		395,921		759,592
Oil and gas revenues | Revision
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues		1,928		4,852
Purchased oil and gas
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues	109,389	128,064	257,860	195,773
Purchased oil and gas expenses	$ 109,662	129,579	$ 259,566	200,173
Purchased oil and gas | As Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues		57,578		75,615
Purchased oil and gas expenses		57,165		75,163
Purchased oil and gas | Revision
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenues		70,486		120,158
Purchased oil and gas expenses		$ 72,414		$ 125,010

Oasis Midstream Partners (Detai

Oasis Midstream Partners (Details) - USD ($)	Feb. 22, 2019	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
2019 Capital Expenditures Arrangement | Oasis Midstream Partners, LP | OMP
Related Party Transaction [Line Items]
Capital contributions under MOU	$ 80,000,000	$ 35,800,000	$ 52,800,000
Bobcat DevCo | OMS Holdings LLC (“OMS”)
Related Party Transaction [Line Items]
Ownership interest (percent)		67.50%	67.50%	75.00%

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregated Revenue (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenues	$ 529,405,000	$ 573,751,000	$ 1,105,137,000	$ 1,047,563,000
Contract asset	0		0		$ 0
Contract liability	0		0		$ 0
Exploration and Production Revenues
Disaggregation of Revenue [Line Items]
Total revenues	466,365,000	525,557,000	983,618,000	959,861,000
Midstream Services
Disaggregation of Revenue [Line Items]
Total revenues	119,445,000	69,408,000	226,027,000	133,970,000
Well Services
Disaggregation of Revenue [Line Items]
Total revenues	39,281,000	59,914,000	71,912,000	104,803,000
Operating Segments | Exploration and Production Revenues
Disaggregation of Revenue [Line Items]
Total revenues	466,365,000	525,557,000	983,618,000	959,861,000
Operating Segments | Exploration and Production Revenues | Crude oil revenues
Disaggregation of Revenue [Line Items]
Total revenues	327,977,000	363,182,000	646,098,000	689,492,000
Operating Segments | Exploration and Production Revenues | Purchased crude oil sales
Disaggregation of Revenue [Line Items]
Total revenues	106,441,000	127,212,000	253,577,000	194,872,000
Operating Segments | Exploration and Production Revenues | Natural gas revenues
Disaggregation of Revenue [Line Items]
Total revenues	9,734,000	23,059,000	41,330,000	50,021,000
Operating Segments | Exploration and Production Revenues | Purchased natural gas sales
Disaggregation of Revenue [Line Items]
Total revenues	2,920,000	496,000	4,255,000	545,000
Operating Segments | Exploration and Production Revenues | NGL revenues
Disaggregation of Revenue [Line Items]
Total revenues	19,293,000	11,608,000	38,358,000	24,931,000
Operating Segments | Midstream Services
Disaggregation of Revenue [Line Items]
Total revenues	51,601,000	29,698,000	99,622,000	57,620,000
Operating Segments | Midstream Services | Purchased crude oil sales
Disaggregation of Revenue [Line Items]
Total revenues	28,000	356,000	28,000	356,000
Operating Segments | Midstream Services | Crude oil and natural gas revenues
Disaggregation of Revenue [Line Items]
Total revenues	22,875,000	17,907,000	47,538,000	35,936,000
Operating Segments | Midstream Services | Produced and flowback water revenues
Disaggregation of Revenue [Line Items]
Total revenues	9,473,000	9,058,000	18,506,000	17,934,000
Operating Segments | Midstream Services | Total midstream service revenues
Disaggregation of Revenue [Line Items]
Total revenues	32,348,000	26,965,000	66,044,000	53,870,000
Operating Segments | Midstream Services | Natural gas and NGL revenues
Disaggregation of Revenue [Line Items]
Total revenues	17,319,000	0	30,116,000	0
Operating Segments | Midstream Services | Freshwater revenues
Disaggregation of Revenue [Line Items]
Total revenues	1,906,000	2,377,000	3,434,000	3,394,000
Operating Segments | Midstream Services | Total midstream product revenues
Disaggregation of Revenue [Line Items]
Total revenues	19,253,000	2,733,000	33,578,000	3,750,000
Operating Segments | Well Services
Disaggregation of Revenue [Line Items]
Total revenues	11,439,000	18,496,000	21,897,000	30,082,000
Operating Segments | Well Services | Hydraulic fracturing revenues
Disaggregation of Revenue [Line Items]
Total revenues	10,628,000	17,390,000	20,403,000	27,816,000
Operating Segments | Well Services | Equipment rental revenues
Disaggregation of Revenue [Line Items]
Total revenues	$ 811,000	$ 1,106,000	$ 1,494,000	$ 2,266,000

Revenue Recognition - Remaining

Revenue Recognition - Remaining Performance Obligation (Details) $ in Thousands	Jun. 30, 2019USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-06-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 108,953
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 11,189
Remaining performance obligation satisfaction period	6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 24,183
Remaining performance obligation satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 27,035
Remaining performance obligation satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 19,262
Remaining performance obligation satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 12,642
Remaining performance obligation satisfaction period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 14,642
Remaining performance obligation satisfaction period

Inventory- Schedule of Inventor

Inventory- Schedule of Inventory (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Inventory
Crude oil inventory	$ 11,923	$ 14,933
Equipment and materials	18,133	18,195
Total inventory	30,056	33,128
Long-term inventory
Linefill in third party pipelines	13,286	12,260
Total long-term inventory	13,286	12,260
Total	$ 43,342	$ 45,388

Accounts Receivable (Details)

Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 397,721	$ 389,128
Allowance for doubtful accounts	(1,617)	(1,526)
Total accounts receivable, net	396,104	387,602
Trade accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	262,189	245,546
Joint interest accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	124,395	133,375
Other accounts
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 11,137	$ 10,207

Fair Value Measurements - Hiera

Fair Value Measurements - Hierarchy of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - Recurring - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets:
Total assets	$ 24,869	$ 107,018
Liabilities:
Total liabilities	4,445	104
Commodity derivative instruments
Liabilities:
Total liabilities	4,445	104
Money market funds
Assets:
Total assets	144	143
Commodity derivative instruments
Assets:
Total assets	24,725	106,875
Level 1
Assets:
Total assets	144	143
Liabilities:
Total liabilities	0	0
Level 1 | Commodity derivative instruments
Liabilities:
Total liabilities	0	0
Level 1 | Money market funds
Assets:
Total assets	144	143
Level 1 | Commodity derivative instruments
Assets:
Total assets	0	0
Level 2
Assets:
Total assets	24,725	106,875
Liabilities:
Total liabilities	4,445	104
Level 2 | Commodity derivative instruments
Liabilities:
Total liabilities	4,445	104
Level 2 | Money market funds
Assets:
Total assets	0	0
Level 2 | Commodity derivative instruments
Assets:
Total assets	24,725	106,875
Level 3
Assets:
Total assets	0	0
Liabilities:
Total liabilities	0	0
Level 3 | Commodity derivative instruments
Liabilities:
Total liabilities	0	0
Level 3 | Money market funds
Assets:
Total assets	0	0
Level 3 | Commodity derivative instruments
Assets:
Total assets	$ 0	$ 0

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Derivative credit risk valuation adjustment, derivative assets	$ 0.1	$ 0.2

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Outstanding Commodity Derivative Instruments (Details) $ in Thousands	1 Months Ended	6 Months Ended
	Aug. 07, 2019MMBTUbbl	Jun. 30, 2019USD ($)MMBTU$ / bblbbl	Aug. 08, 2019$ / bbl
Derivative [Line Items]
Fair value assets (liabilities) | $		$ 20,280
NYMEX WTI | Crude Oil | 2019 Fixed price swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		4,000,000
Average swap price (in dollars per barrel)		57.04
Fair value assets (liabilities) | $		$ (3,303)
NYMEX WTI | Crude Oil | 2019 Two-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		2,592,000
Average floor price (in dollars per barrel)		57.87
Average ceiling price (in dollars per barrel)		74.22
Fair value assets (liabilities) | $		$ 7,308
NYMEX WTI | Crude Oil | 2019 Three-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		2,196,000
Average sub-floor price (in dollars per barrel)		40.14
Average floor price (in dollars per barrel)		51.52
Average ceiling price (in dollars per barrel)		65.92
Fair value assets (liabilities) | $		$ (284)
NYMEX WTI | Crude Oil | 2020 Fixed price swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		2,597,000
Average swap price (in dollars per barrel)		59.30
Fair value assets (liabilities) | $		$ 6,728
NYMEX WTI | Crude Oil | 2020 Two-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		434,000
Average floor price (in dollars per barrel)		58.07
Average ceiling price (in dollars per barrel)		74.64
Fair value assets (liabilities) | $		$ 1,835
NYMEX WTI | Crude Oil | 2020 Three-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		4,268,000
Average sub-floor price (in dollars per barrel)		40
Average floor price (in dollars per barrel)		53.49
Average ceiling price (in dollars per barrel)		64.49
Fair value assets (liabilities) | $		$ 4,790
NYMEX WTI | Crude Oil | 2021 Fixed price swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		93,000
Average swap price (in dollars per barrel)		58.85
Fair value assets (liabilities) | $		$ 357
NYMEX WTI | Crude Oil | 2021 Three-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		310,000
Average sub-floor price (in dollars per barrel)		40
Average floor price (in dollars per barrel)		52.97
Average ceiling price (in dollars per barrel)		63.76
Fair value assets (liabilities) | $		$ 376
NYMEX WTI | Subsequent Event | Crude Oil | 2019 Fixed price swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	4,122,000
Average swap price (in dollars per barrel)			57.13
NYMEX WTI | Subsequent Event | Crude Oil | 2019 Two-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	2,592,000
Average floor price (in dollars per barrel)			57.87
Average ceiling price (in dollars per barrel)			74.22
NYMEX WTI | Subsequent Event | Crude Oil | 2019 Three-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	2,196,000
Average sub-floor price (in dollars per barrel)			40.14
Average floor price (in dollars per barrel)			51.52
Average ceiling price (in dollars per barrel)			65.92
NYMEX WTI | Subsequent Event | Crude Oil | 2020 Fixed price swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	2,992,000
Average swap price (in dollars per barrel)			59.05
NYMEX WTI | Subsequent Event | Crude Oil | 2020 Two-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	1,650,000
Average floor price (in dollars per barrel)			53.04
Average ceiling price (in dollars per barrel)			64.95
NYMEX WTI | Subsequent Event | Crude Oil | 2020 Three-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	4,574,000
Average sub-floor price (in dollars per barrel)			40
Average floor price (in dollars per barrel)			53.26
Average ceiling price (in dollars per barrel)			64.48
NYMEX WTI | Subsequent Event | Crude Oil | 2021 Fixed price swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	93,000
Average swap price (in dollars per barrel)			58.85
NYMEX WTI | Subsequent Event | Crude Oil | 2021 Two-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	62,000
Average floor price (in dollars per barrel)			50.50
Average ceiling price (in dollars per barrel)			60.70
NYMEX WTI | Subsequent Event | Crude Oil | 2021 Three-way collar
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	734,000
Average sub-floor price (in dollars per barrel)			40
Average floor price (in dollars per barrel)			51.26
Average ceiling price (in dollars per barrel)			64.05
ICE Brent-NYMEX WTI | Crude Oil | 2019 Basis swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		60,000
Average swap price (in dollars per barrel)		9.68
Fair value assets (liabilities) | $		$ 86
ICE Brent-NYMEX WTI | Subsequent Event | Crude Oil | 2019 Basis swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	60,000
Average swap price (in dollars per barrel)			9.68
Midland-NYMEX WTI | Crude Oil | 2019 Basis swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		120,000
Average swap price (in dollars per barrel)		6.71
Fair value assets (liabilities) | $		$ (740)
Midland-NYMEX WTI | Subsequent Event | Crude Oil | 2019 Basis swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	120,000
Average swap price (in dollars per barrel)			6.71
Houston NYMEX WTI | Crude Oil | 2019 Basis swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl		366,000
Average swap price (in dollars per barrel)		4.55
Fair value assets (liabilities) | $		$ 90
Houston NYMEX WTI | Subsequent Event | Crude Oil | 2019 Basis swaps
Derivative [Line Items]
Total notional amount of oil (in Bbls) | bbl	366,000
Average swap price (in dollars per barrel)			4.55
NYMEX HH | Natural Gas | 2019 Fixed price swaps
Derivative [Line Items]
Total notional amount of natural gas (in MMBtu) | MMBTU		5,520,000
Average swap price (in dollars per barrel)		2.92
Fair value assets (liabilities) | $		$ 3,037
NYMEX HH | Subsequent Event | Natural Gas | 2019 Fixed price swaps
Derivative [Line Items]
Total notional amount of natural gas (in MMBtu) | MMBTU	5,520,000
Average swap price (in dollars per barrel)			2.92

Derivative Instruments - Realiz

Derivative Instruments - Realized and Unrealized Gains and Losses from Commodity Derivative Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Net gain (loss) on derivative instruments	$ 34,749	$ (120,285)	$ (82,862)	$ (191,401)

Derivative Instruments - Sche_2

Derivative Instruments - Schedule of Location and Fair Value of Outstanding Commodity Derivative Instruments (Details) - Commodity derivative instruments - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Derivative asset, gross amounts recognized	$ 40,433	$ 118,980
Derivative liability, gross amount recognized	11,265	104
Derivative asset, gross amounts offset	(15,708)	(12,105)
Derivative liability, gross amounts offset	(6,820)	0
Derivative asset, net asset	24,725	106,875
Derivative liability, net liability	4,445	104
Current assets
Derivatives, Fair Value [Line Items]
Derivative asset, gross amounts recognized	28,196	110,729
Derivative asset, gross amounts offset	(9,107)	(10,799)
Derivative asset, net asset	19,089	99,930
Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative asset, gross amounts recognized	12,237	8,251
Derivative asset, gross amounts offset	(6,601)	(1,306)
Derivative asset, net asset	5,636	6,945
Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, gross amount recognized	11,265	84
Derivative liability, gross amounts offset	(6,820)	0
Derivative liability, net liability	4,445	84
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, gross amount recognized	0	20
Derivative liability, gross amounts offset	0	0
Derivative liability, net liability	$ 0	$ 20

Property, Plant and Equipment -

Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Abstract]
Proved oil and gas properties	$ 8,244,667	$ 7,878,104
Less: Accumulated depreciation, depletion, amortization and impairment	(3,205,534)	(2,853,353)
Proved oil and gas properties, net	5,039,133	5,024,751
Unproved oil and gas properties	1,038,795	1,034,085
Other property and equipment	1,301,835	1,151,772
Less: Accumulated depreciation	(210,649)	(183,499)
Other property and equipment, net	1,091,186	968,273
Total property, plant and equipment, net	$ 7,169,114	$ 7,027,109

Property, Plant and Equipment_2

Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Proved Oil And Gas Properties
Business Acquisition [Line Items]
Estimate of future asset retirement costs	$ 42.2	$ 40.5
Property, Plant and Equipment, Other Types
Business Acquisition [Line Items]
Estimate of future asset retirement costs	$ 1.4	$ 1.3

Divestitures (Details)

Divestitures (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss recognized on sale of properties	$ 276	$ (1,954)	$ 3,198	$ (1,954)
Foreman Butte Area
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss recognized on sale of properties	$ 276		$ 3,200

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total long-term debt	$ 2,896,524	$ 2,735,276
Credit Facility | Revolving Credit Facility | Oasis Credit Facility
Debt Instrument [Line Items]
Total principal of senior unsecured notes and revolving line of credit	531,000	468,000
Total long-term debt	531,000
Credit Facility | Revolving Credit Facility | OMP Credit Facility
Debt Instrument [Line Items]
Total principal of senior unsecured notes and revolving line of credit	408,000	318,000
Total long-term debt	408,000
Senior Notes
Debt Instrument [Line Items]
Total principal of senior unsecured notes and revolving line of credit	2,039,409	2,039,409
Less: unamortized deferred financing costs on senior unsecured notes	$ (18,507)	(20,865)
Senior Notes | 6.50% senior unsecured notes due November 1, 2021
Debt Instrument [Line Items]
Stated interest rate (as percent)	6.50%
Total principal of senior unsecured notes and revolving line of credit	$ 71,835	71,835
Senior Notes | 6.875% senior unsecured notes due March 15, 2022
Debt Instrument [Line Items]
Stated interest rate (as percent)	6.875%
Total principal of senior unsecured notes and revolving line of credit	$ 901,480	901,480
Senior Notes | 6.875% senior unsecured notes due January 15, 2023
Debt Instrument [Line Items]
Stated interest rate (as percent)	6.875%
Total principal of senior unsecured notes and revolving line of credit	$ 366,094	366,094
Senior Notes | 6.25% senior unsecured notes due May 1, 2026
Debt Instrument [Line Items]
Stated interest rate (as percent)	6.25%
Total principal of senior unsecured notes and revolving line of credit	$ 400,000	400,000
Senior Notes | 2.625% senior unsecured convertible notes due September 15, 2023
Debt Instrument [Line Items]
Stated interest rate (as percent)	2.625%
Total principal of senior unsecured notes and revolving line of credit	$ 300,000	300,000
Less: unamortized debt discount on senior unsecured convertible notes	(63,378)	$ (69,268)
Total long-term debt	$ 300,000

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)$ / shares	Jun. 30, 2019USD ($)day$ / shares	May 06, 2019USD ($)	May 05, 2019USD ($)	Apr. 15, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Total long-term debt	$ 2,896,524,000	$ 2,896,524,000				$ 2,735,276,000
Unsecured Senior Notes
Debt Instrument [Line Items]
Long-term debt, fair value	1,997,500,000	1,997,500,000
Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility amount	3,000,000,000	3,000,000,000
Credit facility borrowing base					$ 1,600,000,000
Line of credit facility, current borrowing capacity					1,350,000,000
Credit Facility | Revolving Credit Facility | Oasis Credit Facility
Debt Instrument [Line Items]
Total long-term debt	$ 531,000,000	$ 531,000,000
Weighted average interest rate (as percent)	4.20%	4.20%
Letters of credit outstanding	$ 14,000,000	$ 14,000,000
Line of credit facility, remaining borrowing capacity	805,000,000	805,000,000
Credit Facility | Revolving Credit Facility | OMP Credit Facility
Debt Instrument [Line Items]
Total long-term debt	408,000,000	408,000,000
Credit facility borrowing base	$ 475,000,000	$ 475,000,000	$ 475,000,000	$ 400,000,000
Maximum borrowing capacity subject to certain conditions			$ 675,000,000
Weighted average interest rate (as percent)	4.20%	4.20%
Letters of credit outstanding	$ 8,200,000	$ 8,200,000
Line of credit facility, remaining borrowing capacity	$ 58,800,000	$ 58,800,000
Credit Facility | Revolving Credit Facility | OMP Credit Facility | Minimum
Debt Instrument [Line Items]
Commitment fee percentage		0.375%
Credit Facility | Revolving Credit Facility | OMP Credit Facility | Maximum
Debt Instrument [Line Items]
Commitment fee percentage		0.50%
Credit Facility | Revolving Credit Facility | LIBOR | Maximum
Debt Instrument [Line Items]
Commitment fee percentage	0.50%
Senior Notes | 2022 and 2023 Notes
Debt Instrument [Line Items]
Total long-term debt	$ 1,267,600,000	$ 1,267,600,000
Senior Notes | Notes [Member]
Debt Instrument [Line Items]
Unsecured debt	$ 1,739,400,000	$ 1,739,400,000
Senior Notes | Notes [Member] | Minimum
Debt Instrument [Line Items]
Stated interest rate (as percent)	6.25%	6.25%
Senior Notes | Notes [Member] | Maximum
Debt Instrument [Line Items]
Stated interest rate (as percent)	6.875%	6.875%
Senior Notes | 2.625% senior unsecured convertible notes due September 15, 2023
Debt Instrument [Line Items]
Total long-term debt	$ 300,000,000	$ 300,000,000
Debt issued	$ 300,000,000	$ 300,000,000
Stated interest rate (as percent)	2.625%	2.625%
Debt conversion rate per $1000 principal (in shares per $1000)		0.076365
Debt conversion price (in dollars per share) | $ / shares	$ 13.10	$ 13.10
Swingline Loan | Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility borrowing base					$ 50,000,000
Revolving Credit Facility | Revolving Credit Facility | LIBOR | Minimum
Debt Instrument [Line Items]
Commitment fee percentage	0.375%
Debt Conversion Scenario 1 | Senior Notes | 2.625% senior unsecured convertible notes due September 15, 2023
Debt Instrument [Line Items]
Number of trading days | day		20
Number of consecutive trading days | day		30
Stock price relative to conversion price (percent)		130.00%
Debt Conversion Scenario 2 | Senior Notes | 2.625% senior unsecured convertible notes due September 15, 2023
Debt Instrument [Line Items]
Number of trading days | day		5
Number of consecutive trading days | day		5
Stock price relative to product of sale price and conversion rate (percent)		98.00%

Asset Retirement Obligations -

Asset Retirement Obligations - Schedule of Changes in Asset Retirement Obligations (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
December 31, 2018	$ 52,449
Liabilities incurred during period	1,019
Liabilities settled during period	(139)
Accretion expense during period	1,928
Revisions to estimates	827
June 30, 2019	$ 56,084

Asset Retirement Obligations _2

Asset Retirement Obligations - Additional Information (Details) $ in Millions	Jun. 30, 2019USD ($)
Asset Retirement Obligation Disclosure [Abstract]
Total asset retirement obligations, current portion	$ 0.9

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
Effective tax rate (as percent)	19.30%	24.20%	(17.70%)	24.30%
Pre-tax income (loss)	$ 63,414	$ (417,302)	$ (48,267)	$ (412,762)

Equity-Based Compensation - Add

Equity-Based Compensation - Additional Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)shares	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)day$ / sharesshares	Jun. 30, 2018USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expenses | $			$ 17,924	$ 14,130
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			3 years
Stock granted (in shares) | shares			4,035,175
Granted, weighted average grant date fair value per unit (in usd per share) | $ / shares			$ 6.62
Equity-based compensation expenses | $	$ 6,300	$ 4,900	$ 12,600	9,600
Performance Share Unit Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock granted (in shares) | shares			1,685,090
Granted, weighted average grant date fair value per unit (in usd per share) | $ / shares			$ 6.80
Equity-based compensation expenses | $	$ 2,500	2,300	$ 5,000	4,200
Right to received shares of common stock (in shares) | shares	1		1
Number of trading days | day			30
Performance Share Unit Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSU granted percentage of earnings (as a percent)			0.00%
Performance Share Unit Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
PSU granted percentage of earnings (as a percent)			200.00%
Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock granted (in shares) | shares			341,290
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period			1 year
Stock granted (in shares) | shares			16,170
Granted, weighted average grant date fair value per unit (in usd per share) | $ / shares			$ 18.57
Oasis Midstream Partners, LP | Phantom Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, weighted average grant date fair value per unit (in usd per share) | $ / shares			$ 18.57
Equity-based compensation expenses | $	$ 800	100	$ 1,500	200
OMP General Partner LLC | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity-based compensation expenses | $	$ 100	$ 100	$ 200	$ 200

Equity-Based Compensation - Sum

Equity-Based Compensation - Summary of Assumptions (Details) - Performance Share Units	6 Months Ended
	Jun. 30, 2019$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Oasis volatility (as percent)	71.17%
Oasis initial value (usd per share)	$ 5.85
Oasis stock price on date of grant (usd per share)	$ 6.63
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate (as percent)	2.55%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate (as percent)	2.56%

Earnings (Loss) Per Share - Sch

Earnings (Loss) Per Share - Schedule of Weighted-Average Number of Shares Outstanding (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Basic and diluted weighted average common shares outstanding (shares)	314,982	313,072	314,724	301,652

Earnings (Loss) Per Share - S_2

Earnings (Loss) Per Share - Schedule of Common Shares Excluded from Diluted Earnings (Loss) per Share (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restricted stock awards and PSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti-dilutive stock-based compensation awards (in shares)	10,406	7,515	10,369	7,440

Business Segment Information -

Business Segment Information - Additional Information (Details)	6 Months Ended
	Jun. 30, 2019Segment
Segment Reporting [Abstract]
Number of current operating units	3

Business Segment Information _2

Business Segment Information - Summarized Financial Information of Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenues	$ 529,405	$ 573,751	$ 1,105,137	$ 1,047,563
Operating income	71,572	(242,674)	122,016	(129,689)
Other income (expense)	(8,158)	(174,628)	(170,283)	(283,073)
Income (loss) before income taxes	63,414	(417,302)	(48,267)	(412,762)
General and administrative	30,926	28,230	65,385	56,170
Equity-based compensation	8,911	7,376	17,924	14,130
Property, plant and equipment, net	7,169,114		7,169,114		$ 7,027,109
Total assets	7,710,288		7,710,288		7,626,142
Exploration and Production Revenues
Segment Reporting Information [Line Items]
Total revenues	466,365	525,557	983,618	959,861
Midstream Services
Segment Reporting Information [Line Items]
Total revenues	119,445	69,408	226,027	133,970
Well Services
Segment Reporting Information [Line Items]
Total revenues	39,281	59,914	71,912	104,803
Operating Segments | Exploration and Production Revenues
Segment Reporting Information [Line Items]
Total revenues	466,365	525,557	983,618	959,861
Operating income	18,895	(280,090)	20,819	(200,130)
Other income (expense)	(3,970)	(174,572)	(162,352)	(282,717)
Income (loss) before income taxes	14,925	(454,662)	(141,533)	(482,847)
General and administrative	25,761	23,492	53,288	46,971
Equity-based compensation	8,522	7,012	17,102	13,463
Property, plant and equipment, net	6,336,438		6,336,438		6,311,566
Total assets	6,804,705		6,804,705		6,838,987
Operating Segments | Midstream Services
Segment Reporting Information [Line Items]
Total revenues	51,601	29,698	99,622	57,620
Operating income	55,216	37,894	105,022	70,132
Other income (expense)	(4,200)	(79)	(7,948)	(336)
Income (loss) before income taxes	51,016	37,815	97,074	69,796
General and administrative	7,980	6,079	16,841	12,493
Equity-based compensation	515	409	980	780
Property, plant and equipment, net	1,024,625		1,024,625		893,285
Total assets	1,057,033		1,057,033		920,619
Operating Segments | Well Services
Segment Reporting Information [Line Items]
Total revenues	11,439	18,496	21,897	30,082
Operating income	1,487	8,028	2,302	16,178
Other income (expense)	12	23	17	(20)
Income (loss) before income taxes	1,499	8,051	2,319	16,158
General and administrative	6,088	5,756	13,549	11,647
Equity-based compensation	527	409	1,088	795
Property, plant and equipment, net	30,792		30,792		38,871
Total assets	36,292		36,292		48,150
Inter-segment | Exploration and Production Revenues
Segment Reporting Information [Line Items]
Total revenues	0	0	0	0
Inter-segment | Midstream Services
Segment Reporting Information [Line Items]
Total revenues	67,844	39,710	126,405	76,350
Inter-segment | Well Services
Segment Reporting Information [Line Items]
Total revenues	27,842	41,418	50,015	74,721
Eliminations
Segment Reporting Information [Line Items]
Total revenues	(95,686)	(81,128)	(176,420)	(151,071)
Operating income	(4,026)	(8,506)	(6,127)	(15,869)
Other income (expense)	0	0	0	0
Income (loss) before income taxes	(4,026)	(8,506)	(6,127)	(15,869)
General and administrative	(8,903)	(7,097)	(18,293)	(14,941)
Equity-based compensation	(653)	$ (454)	(1,246)	$ (908)
Property, plant and equipment, net	(222,741)		(222,741)		(216,613)
Total assets	$ (187,742)		$ (187,742)		$ (181,614)

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 20,054
Operating lease liabilities	25,857
Finance lease ROU assets	7,900
Finance lease liabilities	$ 7,900
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease assets		$ 31,100
Operating lease liabilities		37,100
Finance lease ROU assets		6,000
Finance lease liabilities		$ 6,000

Leases - Components of lease ex

Leases - Components of lease expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Lease, Cost [Abstract]
Operating lease costs	$ 6,799	$ 18,475
Variable lease costs	3,963	5,003
Short-term lease costs	907	1,370
Amortization of ROU assets	650	1,216
Interest on lease liabilities	69	124
Total lease costs	$ 12,388	$ 26,188

Leases - Maturities of the Comp

Leases - Maturities of the Company's lease liabilities (Details) $ in Thousands	Jun. 30, 2019USD ($)
Operating Leases
2019 (excluding the six months ended June 30, 2019)	$ 6,276
2020	4,594
2021	1,680
2022	2,297
2023	2,345
Thereafter	12,802
Total future lease payments	29,994
Less: Imputed interest	4,137
Present value of future lease payments	25,857
Finance Leases
2019 (excluding the six months ended June 30, 2019)	1,440
2020	2,881
2021	2,068
2022	1,298
2023	234
Thereafter	684
Total future lease payments	8,605
Less: Imputed interest	705
Present value of future lease payments	$ 7,900

Leases - Schedule of future min

Leases - Schedule of future minimum annual rental commitments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 8,723
2020	7,009
2021	6,005
2022	5,130
2023	4,361
Thereafter	13,134
Total future minimum lease payments	$ 44,362

Leases - Supplemental balance s

Leases - Supplemental balance sheet information (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating right-of-use assets	$ 20,054
Finance lease assets	7,900
Total lease assets	27,954
Operating lease liabilities, current	7,837
Finance lease liabilities, current	2,626
Operating lease liabilities, noncurrent	18,021
Finance lease liabilities, noncurrent	5,247
Total lease liabilities	33,731
Finance lease ROU assets accumulated amortization	$ 1,200

Leases - Schedule of supplement

Leases - Schedule of supplemental cash flow information and non-cash transactions related to Company's leases (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 16,696
Operating cash flows from finance leases	124
Financing cash flows from finance leases	941
Right-of-use assets obtained in exchange for operating lease obligations	6,803
Right-of-use assets obtained in exchange for finance lease obligations	$ 3,174

Leases - Weighted-average remai

Leases - Weighted-average remaining lease term and discount rate for the Company’s leases (Details)	Jun. 30, 2019
Leases [Abstract]
Weighted average remaining lease term - operating leases	7 years 1 month 6 days
Weighted average discount rate (percent) - operating leases	4.00%
Weighted average remaining lease term - finance leases	4 years 1 month 6 days
Weighted average discount rate (percent) - finance leases	3.80%

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) bbl in Millions, Bcf in Millions, $ in Millions	Mar. 23, 2017USD ($)	Jun. 30, 2019USD ($)Bcfbbl
Loss Contingencies [Line Items]
Required delivery time-frame under volume commitments time frame agreements		10 years
Estimable future commitments under agreements | $		$ 643.1
Mirada Litigation | Pending
Loss Contingencies [Line Items]
Damages sought (in excess of) | $	$ 100
Crude Oil
Loss Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl)		48.3
Natural gas liquids
Loss Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl)		39.5
Natural Gas
Loss Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl) | Bcf		900.2
Water
Loss Contingencies [Line Items]
Minimum quantity to be delivered or transported (in MMBbl)		31.7

Condensed Consolidating Finan_3

Condensed Consolidating Financial Information - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Ownership percentage, guarantors (as percent)			100.00%
Investments in and advances to subsidiaries	$ 0		$ 0		$ 0
Oasis share of stockholders’ equity	3,676,772		3,676,772		3,734,576
Non-controlling interests	189,686		189,686		184,304
Equity in earnings of subsidiaries	0	$ 0	0	$ 0
Net income attributable to non-controlling interest	8,417	3,903	15,321	7,025
Net income attributable to Oasis	42,757	(320,204)	(72,125)	(319,614)
Distributions to non-controlling interests			10,093	6,846
Investment in / capital contributions from subsidiaries			0	0
(Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Net income attributable to Oasis		0		0
Intercompany Eliminations
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	(5,253,737)		(5,253,737)		(5,256,567)
Oasis share of stockholders’ equity	(5,144,195)		(5,144,195)		(5,139,158)
Non-controlling interests	(125,445)		(125,445)		(128,511)
Equity in earnings of subsidiaries	(111,373)	247,085	(56,616)	188,263
Net income attributable to non-controlling interest	(14,420)	(21,139)	(29,312)	(39,591)
Net income attributable to Oasis	(100,053)	265,571	(32,104)	223,452
Distributions to non-controlling interests			(33,488)	(48,911)
Investment in / capital contributions from subsidiaries			(18,565)	(37,540)
Intercompany Eliminations | (Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries					20,700
Oasis share of stockholders’ equity					(163,600)
Non-controlling interests					184,300
Equity in earnings of subsidiaries		6,600		11,400
Net income attributable to non-controlling interest		3,900		7,000
Distributions to non-controlling interests				48,900
Parent/ Issuer
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	4,886,462		4,886,462		4,900,528
Oasis share of stockholders’ equity	3,676,772		3,676,772		3,734,576
Non-controlling interests	0		0		0
Equity in earnings of subsidiaries	73,855	(278,014)	(15,637)	(245,850)
Net income attributable to non-controlling interest	0	0	0	0
Net income attributable to Oasis	42,757	(320,204)	(72,125)	(319,614)
Distributions to non-controlling interests			0	0
Investment in / capital contributions from subsidiaries			3,124	(5,619)
Parent/ Issuer | (Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries					(9,600)
Oasis share of stockholders’ equity					(9,600)
Combined Guarantor Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	367,275		367,275		356,039
Oasis share of stockholders’ equity	4,886,462		4,886,462		4,900,528
Non-controlling interests	0		0		0
Equity in earnings of subsidiaries	37,518	30,929	72,253	57,587
Net income attributable to non-controlling interest	0	0	0	0
Net income attributable to Oasis	73,855	(278,014)	(15,637)	(245,850)
Distributions to non-controlling interests			0	0
Investment in / capital contributions from subsidiaries			42,642	33,695
Combined Guarantor Subsidiaries | (Overstated) / understated
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries					(11,100)
Oasis share of stockholders’ equity					173,200
Non-controlling interests					(184,300)
Equity in earnings of subsidiaries		(6,600)		(11,400)
Net income attributable to non-controlling interest		(3,900)		(7,000)
Distributions to non-controlling interests				(48,900)
Combined Non-guarantor
Condensed Financial Statements, Captions [Line Items]
Investments in and advances to subsidiaries	0		0		0
Oasis share of stockholders’ equity	257,733		257,733		238,630
Non-controlling interests	315,131		315,131		$ 312,815
Equity in earnings of subsidiaries	0	0	0	0
Net income attributable to non-controlling interest	22,837	25,042	44,633	46,616
Net income attributable to Oasis	$ 26,198	$ 12,443	47,741	22,398
Distributions to non-controlling interests			43,581	55,757
Investment in / capital contributions from subsidiaries			$ (27,201)	$ 9,464

Condensed Consolidating Finan_4

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 20,258		$ 22,190
Accounts receivable, net	396,104		387,602
Accounts receivable - affiliates	0		0
Inventory	30,056		33,128
Prepaid expenses	6,018		10,997
Derivative instruments	19,089		99,930
Intangible assets, net	0		125
Other current assets	195		183
Total current assets	471,720		554,155
Property, plant and equipment
Oil and gas properties (successful efforts method)	9,283,462		8,912,189
Other property and equipment	1,301,835		1,151,772
Less: accumulated depreciation, depletion, amortization and impairment	(3,416,183)		(3,036,852)
Total property, plant and equipment, net	7,169,114		7,027,109
Investments in and advances to subsidiaries	0		0
Derivative instruments	5,636		6,945
Deferred income taxes	0		0
Long-term inventory	13,286		12,260
Operating right-of-use assets	20,054
Other assets	30,478		25,673
Total assets	7,710,288		7,626,142
Current liabilities
Accounts payable	15,155		20,166
Accounts payable - affiliates	0		0
Revenues and production taxes payable	170,534		216,695
Accrued liabilities	315,450		331,651
Accrued interest payable	37,701		38,040
Derivative instruments	4,445		84
Advances from joint interest partners	4,076		5,140
Current operating lease liabilities	7,837
Other current liabilities	3,230		0
Total current liabilities	558,428		611,776
Long-term debt	2,896,524		2,735,276
Deferred income taxes	308,672		300,055
Asset retirement obligations	55,228		52,384
Derivative instruments	0		20
Operating lease liabilities	18,021
Other liabilities	6,957		7,751
Total liabilities	3,843,830		3,707,262
Stockholders’ equity
Oasis share of stockholders’ equity	3,676,772		3,734,576
Non-controlling interests	189,686		184,304
Total stockholders’ equity	3,866,458	$ 3,811,135	3,918,880	$ 3,574,251	$ 3,886,158	$ 3,513,579
Total liabilities and stockholders’ equity	7,710,288		7,626,142
Intercompany Eliminations
Current assets
Cash and cash equivalents	0		0
Accounts receivable, net	0		0
Accounts receivable - affiliates	(745,077)		(800,314)
Inventory	0		0
Prepaid expenses	0		0
Derivative instruments	0		0
Intangible assets, net			0
Other current assets	0		0
Total current assets	(745,077)		(800,314)
Property, plant and equipment
Oil and gas properties (successful efforts method)	(15,903)		(11,102)
Other property and equipment	0		0
Less: accumulated depreciation, depletion, amortization and impairment	0		0
Total property, plant and equipment, net	(15,903)		(11,102)
Investments in and advances to subsidiaries	(5,253,737)		(5,256,567)
Derivative instruments	0		0
Deferred income taxes	(243,866)		(219,670)
Long-term inventory	0		0
Operating right-of-use assets	0
Other assets	0		0
Total assets	(6,258,583)		(6,287,653)
Current liabilities
Accounts payable	0		0
Accounts payable - affiliates	(745,077)		(800,314)
Revenues and production taxes payable	0		0
Accrued liabilities	0		0
Accrued interest payable	0		0
Derivative instruments	0		0
Advances from joint interest partners	0		0
Current operating lease liabilities	0
Other current liabilities	0
Total current liabilities	(745,077)		(800,314)
Long-term debt	0		0
Deferred income taxes	(243,866)		(219,670)
Asset retirement obligations	0		0
Derivative instruments			0
Operating lease liabilities	0
Other liabilities	0		0
Total liabilities	(988,943)		(1,019,984)
Stockholders’ equity
Oasis share of stockholders’ equity	(5,144,195)		(5,139,158)
Non-controlling interests	(125,445)		(128,511)
Total stockholders’ equity	(5,269,640)		(5,267,669)
Total liabilities and stockholders’ equity	(6,258,583)		(6,287,653)
Parent/ Issuer
Current assets
Cash and cash equivalents	144		179
Accounts receivable, net	0		0
Accounts receivable - affiliates	585,473		643,382
Inventory	0		0
Prepaid expenses	273		373
Derivative instruments	0		0
Intangible assets, net			0
Other current assets	0		0
Total current assets	585,890		643,934
Property, plant and equipment
Oil and gas properties (successful efforts method)	0		0
Other property and equipment	0		0
Less: accumulated depreciation, depletion, amortization and impairment	0		0
Total property, plant and equipment, net	0		0
Investments in and advances to subsidiaries	4,886,462		4,900,528
Derivative instruments	0		0
Deferred income taxes	243,866		219,670
Long-term inventory	0		0
Operating right-of-use assets	0
Other assets	0		0
Total assets	5,716,218		5,764,132
Current liabilities
Accounts payable	0		0
Accounts payable - affiliates	44,643		43,113
Revenues and production taxes payable	0		0
Accrued liabilities	183		71
Accrued interest payable	37,096		37,096
Derivative instruments	0		0
Advances from joint interest partners	0		0
Current operating lease liabilities	0
Other current liabilities	0
Total current liabilities	81,922		80,280
Long-term debt	1,957,524		1,949,276
Deferred income taxes	0		0
Asset retirement obligations	0		0
Derivative instruments			0
Operating lease liabilities	0
Other liabilities	0		0
Total liabilities	2,039,446		2,029,556
Stockholders’ equity
Oasis share of stockholders’ equity	3,676,772		3,734,576
Non-controlling interests	0		0
Total stockholders’ equity	3,676,772		3,734,576
Total liabilities and stockholders’ equity	5,716,218		5,764,132
Combined Guarantor Subsidiaries
Current assets
Cash and cash equivalents	13,868		15,362
Accounts receivable, net	390,094		385,121
Accounts receivable - affiliates	79,516		76,127
Inventory	30,056		33,106
Prepaid expenses	4,478		9,206
Derivative instruments	19,089		99,930
Intangible assets, net			125
Other current assets	195		183
Total current assets	537,296		619,160
Property, plant and equipment
Oil and gas properties (successful efforts method)	9,299,365		8,923,291
Other property and equipment	241,456		218,617
Less: accumulated depreciation, depletion, amortization and impairment	(3,336,023)		(2,974,122)
Total property, plant and equipment, net	6,204,798		6,167,786
Investments in and advances to subsidiaries	367,275		356,039
Derivative instruments	5,636		6,945
Deferred income taxes	0		0
Long-term inventory	13,286		12,260
Operating right-of-use assets	16,412
Other assets	27,093		23,221
Total assets	7,171,796		7,185,411
Current liabilities
Accounts payable	14,381		18,567
Accounts payable - affiliates	665,561		724,187
Revenues and production taxes payable	169,786		216,114
Accrued liabilities	258,337		273,923
Accrued interest payable	312		502
Derivative instruments	4,445		84
Advances from joint interest partners	4,076		5,140
Current operating lease liabilities	5,786
Other current liabilities	2,620
Total current liabilities	1,125,304		1,238,517
Long-term debt	531,000		468,000
Deferred income taxes	552,538		519,725
Asset retirement obligations	53,664		50,870
Derivative instruments			20
Operating lease liabilities	16,424
Other liabilities	6,404		7,751
Total liabilities	2,285,334		2,284,883
Stockholders’ equity
Oasis share of stockholders’ equity	4,886,462		4,900,528
Non-controlling interests	0		0
Total stockholders’ equity	4,886,462		4,900,528
Total liabilities and stockholders’ equity	7,171,796		7,185,411
Combined Non-guarantor
Current assets
Cash and cash equivalents	6,246		6,649
Accounts receivable, net	6,010		2,481
Accounts receivable - affiliates	80,088		80,805
Inventory	0		22
Prepaid expenses	1,267		1,418
Derivative instruments	0		0
Intangible assets, net			0
Other current assets	0		0
Total current assets	93,611		91,375
Property, plant and equipment
Oil and gas properties (successful efforts method)	0		0
Other property and equipment	1,060,379		933,155
Less: accumulated depreciation, depletion, amortization and impairment	(80,160)		(62,730)
Total property, plant and equipment, net	980,219		870,425
Investments in and advances to subsidiaries	0		0
Derivative instruments	0		0
Deferred income taxes	0		0
Long-term inventory	0		0
Operating right-of-use assets	3,642
Other assets	3,385		2,452
Total assets	1,080,857		964,252
Current liabilities
Accounts payable	774		1,599
Accounts payable - affiliates	34,873		33,014
Revenues and production taxes payable	748		581
Accrued liabilities	56,930		57,657
Accrued interest payable	293		442
Derivative instruments	0		0
Advances from joint interest partners	0		0
Current operating lease liabilities	2,051
Other current liabilities	610
Total current liabilities	96,279		93,293
Long-term debt	408,000		318,000
Deferred income taxes	0		0
Asset retirement obligations	1,564		1,514
Derivative instruments			0
Operating lease liabilities	1,597
Other liabilities	553		0
Total liabilities	507,993		412,807
Stockholders’ equity
Oasis share of stockholders’ equity	257,733		238,630
Non-controlling interests	315,131		312,815
Total stockholders’ equity	572,864		551,445
Total liabilities and stockholders’ equity	$ 1,080,857		$ 964,252

Condensed Consolidating Finan_5

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Balance Sheet - Additional Information (Details) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	900,000,000	900,000,000
Common stock, shares issued (in shares)	324,680,450	320,469,049
Common stock, shares outstanding (in shares)	321,894,286	318,377,161
Treasury stock, shares (in shares)	2,786,164	2,091,888

Condensed Consolidating Finan_6

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Total revenues	$ 529,405		$ 573,751		$ 1,105,137	$ 1,047,563
Operating expenses
Lease operating expenses	56,228		44,141		114,672	88,922
Marketing, transportation and gathering expenses	28,488		22,833		63,438	43,846
Production taxes	28,142		34,026		57,760	65,026
Depreciation, depletion and amortization	177,358		153,570		367,191	302,835
Exploration expenses	887		617		1,717	1,386
Impairment	24		384,135		653	384,228
General and administrative expenses	30,926		28,230		65,385	56,170
Total operating expenses	457,557		818,379		979,923	1,179,206
Loss on sale of properties	(276)		1,954		(3,198)	1,954
Operating income (loss)	71,572		(242,674)		122,016	(129,689)
Other income (expense)
Equity in earnings of subsidiaries	0		0		0	0
Net gain (loss) on derivative instruments	34,749		(120,285)		(82,862)	(191,401)
Interest expense, net of capitalized interest	(43,186)		(40,910)		(87,654)	(78,056)
Loss on extinguishment of debt	0		(13,651)		0	(13,651)
Other income (expense)	279		218		233	35
Total other expense, net	(8,158)		(174,628)		(170,283)	(283,073)
Income (loss) before income taxes	63,414		(417,302)		(48,267)	(412,762)
Income tax benefit (expense)	(12,240)		101,001		(8,537)	100,173
Net income (loss) including non-controlling interests	51,174	$ (107,978)	(316,301)	$ 3,712	(56,804)	(312,589)
Less: Net income attributable to non-controlling interests	8,417		3,903		15,321	7,025
Net income (loss) attributable to Oasis	42,757		(320,204)		(72,125)	(319,614)
Intercompany Eliminations
Revenues
Total revenues	(47,153)		(38,133)		(93,853)	(72,782)
Operating expenses
Lease operating expenses	(13,134)		(13,474)		(26,475)	(24,392)
Marketing, transportation and gathering expenses	(10,086)		(5,820)		(20,373)	(11,479)
Production taxes	0		0		0	0
Depreciation, depletion and amortization	(4,958)		(3,643)		(10,123)	(6,969)
Exploration expenses	0		0		0	0
Impairment	0		0		0	0
General and administrative expenses	(4,543)		(3,117)		(8,716)	(6,237)
Total operating expenses	(44,053)		(35,480)		(89,053)	(68,380)
Loss on sale of properties	0		0		0	0
Operating income (loss)	(3,100)		(2,653)		(4,800)	(4,402)
Other income (expense)
Equity in earnings of subsidiaries	(111,373)		247,085		(56,616)	188,263
Net gain (loss) on derivative instruments	0		0		0	0
Interest expense, net of capitalized interest	0		0		0	0
Loss on extinguishment of debt			0			0
Other income (expense)	0		0		0	0
Total other expense, net	(111,373)		247,085		(56,616)	188,263
Income (loss) before income taxes	(114,473)		244,432		(61,416)	183,861
Income tax benefit (expense)	0		0		0	0
Net income (loss) including non-controlling interests	(114,473)		244,432		(61,416)	183,861
Less: Net income attributable to non-controlling interests	(14,420)		(21,139)		(29,312)	(39,591)
Net income (loss) attributable to Oasis	(100,053)		265,571		(32,104)	223,452
Parent/ Issuer
Revenues
Total revenues	0		0		0	0
Operating expenses
Lease operating expenses	0		0		0	0
Marketing, transportation and gathering expenses	0		0		0	0
Production taxes	0		0		0	0
Depreciation, depletion and amortization	0		0		0	0
Exploration expenses	0		0		0	0
Impairment	0		0		0	0
General and administrative expenses	6,308		7,496		15,395	14,728
Total operating expenses	6,308		7,496		15,395	14,728
Loss on sale of properties	0		0		0	0
Operating income (loss)	(6,308)		(7,496)		(15,395)	(14,728)
Other income (expense)
Equity in earnings of subsidiaries	73,855		(278,014)		(15,637)	(245,850)
Net gain (loss) on derivative instruments	0		0		0	0
Interest expense, net of capitalized interest	(32,415)		(33,135)		(65,291)	(65,581)
Loss on extinguishment of debt			(13,651)			(13,651)
Other income (expense)	1		0		1	0
Total other expense, net	41,441		(324,800)		(80,927)	(325,082)
Income (loss) before income taxes	35,133		(332,296)		(96,322)	(339,810)
Income tax benefit (expense)	7,624		12,092		24,197	20,196
Net income (loss) including non-controlling interests	42,757		(320,204)		(72,125)	(319,614)
Less: Net income attributable to non-controlling interests	0		0		0	0
Net income (loss) attributable to Oasis	42,757		(320,204)		(72,125)	(319,614)
Combined Guarantor Subsidiaries
Revenues
Total revenues	478,914		545,326		1,009,695	992,366
Operating expenses
Lease operating expenses	69,362		57,615		141,147	113,314
Marketing, transportation and gathering expenses	38,574		28,653		83,811	55,325
Production taxes	28,142		34,026		57,760	65,026
Depreciation, depletion and amortization	173,754		150,554		359,823	296,781
Exploration expenses	887		617		1,717	1,386
Impairment	24		384,135		653	384,228
General and administrative expenses	21,352		17,954		42,177	35,632
Total operating expenses	450,906		817,473		964,621	1,174,338
Loss on sale of properties	(276)		1,954		(3,198)	1,954
Operating income (loss)	27,732		(270,193)		41,876	(180,018)
Other income (expense)
Equity in earnings of subsidiaries	37,518		30,929		72,253	57,587
Net gain (loss) on derivative instruments	34,749		(120,285)		(82,862)	(191,401)
Interest expense, net of capitalized interest	(6,562)		(7,592)		(14,406)	(12,030)
Loss on extinguishment of debt			0			0
Other income (expense)	282		218		236	35
Total other expense, net	65,987		(96,730)		(24,779)	(145,809)
Income (loss) before income taxes	93,719		(366,923)		17,097	(325,827)
Income tax benefit (expense)	(19,864)		88,909		(32,734)	79,977
Net income (loss) including non-controlling interests	73,855		(278,014)		(15,637)	(245,850)
Less: Net income attributable to non-controlling interests	0		0		0	0
Net income (loss) attributable to Oasis	73,855		(278,014)		(15,637)	(245,850)
Combined Non-guarantor
Revenues
Total revenues	97,644		66,558		189,295	127,979
Operating expenses
Lease operating expenses	0		0		0	0
Marketing, transportation and gathering expenses	0		0		0	0
Production taxes	0		0		0	0
Depreciation, depletion and amortization	8,562		6,659		17,491	13,023
Exploration expenses	0		0		0	0
Impairment	0		0		0	0
General and administrative expenses	7,809		5,897		16,529	12,047
Total operating expenses	44,396		28,890		88,960	58,520
Loss on sale of properties	0		0		0	0
Operating income (loss)	53,248		37,668		100,335	69,459
Other income (expense)
Equity in earnings of subsidiaries	0		0		0	0
Net gain (loss) on derivative instruments	0		0		0	0
Interest expense, net of capitalized interest	(4,209)		(183)		(7,957)	(445)
Loss on extinguishment of debt			0			0
Other income (expense)	(4)		0		(4)	0
Total other expense, net	(4,213)		(183)		(7,961)	(445)
Income (loss) before income taxes	49,035		37,485		92,374	69,014
Income tax benefit (expense)	0		0		0	0
Net income (loss) including non-controlling interests	49,035		37,485		92,374	69,014
Less: Net income attributable to non-controlling interests	22,837		25,042		44,633	46,616
Net income (loss) attributable to Oasis	26,198		12,443		47,741	22,398
Oil and gas revenues
Revenues
Total revenues	357,004		397,849		725,786	764,444
Oil and gas revenues | Intercompany Eliminations
Revenues
Total revenues	0		0		0	0
Oil and gas revenues | Parent/ Issuer
Revenues
Total revenues	0		0		0	0
Oil and gas revenues | Combined Guarantor Subsidiaries
Revenues
Total revenues	357,004		397,849		725,786	764,444
Oil and gas revenues | Combined Non-guarantor
Revenues
Total revenues	0		0		0	0
Purchased oil and gas
Revenues
Total revenues	109,389		128,064		257,860	195,773
Operating expenses
Expenses	109,662		129,579		259,566	200,173
Purchased oil and gas | Intercompany Eliminations
Revenues
Total revenues	0		0		0	0
Operating expenses
Expenses	0		0		0	0
Purchased oil and gas | Parent/ Issuer
Revenues
Total revenues	0		0		0	0
Operating expenses
Expenses	0		0		0	0
Purchased oil and gas | Combined Guarantor Subsidiaries
Revenues
Total revenues	109,389		128,064		257,860	195,773
Operating expenses
Expenses	109,662		129,579		259,566	200,173
Purchased oil and gas | Combined Non-guarantor
Revenues
Total revenues	0		0		0	0
Operating expenses
Expenses	0		0		0	0
Midstream Services
Revenues
Total revenues	51,573		29,342		99,594	57,264
Operating expenses
Expenses	17,368		7,688		34,097	15,673
Midstream Services | Intercompany Eliminations
Revenues
Total revenues	(47,153)		(38,133)		(93,853)	(72,782)
Operating expenses
Expenses	(11,332)		(9,426)		(23,366)	(19,303)
Midstream Services | Parent/ Issuer
Revenues
Total revenues	0		0		0	0
Operating expenses
Expenses	0		0		0	0
Midstream Services | Combined Guarantor Subsidiaries
Revenues
Total revenues	1,082		917		4,152	2,067
Operating expenses
Expenses	675		780		2,523	1,526
Midstream Services | Combined Non-guarantor
Revenues
Total revenues	97,644		66,558		189,295	127,979
Operating expenses
Expenses	28,025		16,334		54,940	33,450
Well Services
Revenues
Total revenues	11,439		18,496		21,897	30,082
Operating expenses
Expenses	8,474		13,560		15,444	20,947
Well Services | Intercompany Eliminations
Revenues
Total revenues	0		0		0	0
Operating expenses
Expenses	0		0		0	0
Well Services | Parent/ Issuer
Revenues
Total revenues	0		0		0	0
Operating expenses
Expenses	0		0		0	0
Well Services | Combined Guarantor Subsidiaries
Revenues
Total revenues	11,439		18,496		21,897	30,082
Operating expenses
Expenses	8,474		13,560		15,444	20,947
Well Services | Combined Non-guarantor
Revenues
Total revenues	0		0		0	0
Operating expenses
Expenses	$ 0		$ 0		$ 0	$ 0

Condensed Consolidating Finan_7

Condensed Consolidating Financial Information - Schedule of Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net loss including non-controlling interests	$ 51,174	$ (107,978)	$ (316,301)	$ 3,712	$ (56,804)	$ (312,589)
Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by (used in) operating activities:
Equity in earnings (loss) of subsidiaries	0		0		0	0
Depreciation, depletion and amortization	177,358		153,570		367,191	302,835
Loss on extinguishment of debt	0		13,651		0	13,651
(Gain) loss on sale of properties	276		(1,954)		3,198	(1,954)
Impairment	24		384,135		653	384,228
Deferred income taxes					8,617	(100,293)
Derivative instruments	(34,749)		120,285		82,862	191,401
Equity-based compensation expenses					17,924	14,130
Deferred financing costs amortization and other					12,245	10,518
Working capital and other changes:
Change in accounts receivable, net					(12,914)	(5,866)
Change in inventory					3,029	(4,721)
Change in prepaid expenses					3,918	573
Change in accounts payable, interest payable and accrued liabilities					(36,514)	40,849
Change in other assets and liabilities, net					(4,473)	(746)
Net cash provided by operating activities					388,932	532,016
Cash flows from investing activities:
Capital expenditures					(525,501)	(536,959)
Acquisitions					(5,781)	(524,255)
Derivative settlements					3,629
Proceeds from sale of properties					0	2,236
Derivative settlements						(96,823)
Other					0	(933)
Net cash used in investing activities					(527,653)	(1,156,734)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities					1,178,000	1,933,000
Principal payments on revolving credit facility					(1,025,000)	(1,265,000)
Repurchase of senior unsecured notes					0	(423,143)
Proceeds from issuance of senior unsecured notes					0	400,000
Deferred financing costs					(482)	(6,790)
Purchases of treasury stock					(4,305)	(6,064)
Distributions to non-controlling interests					(10,093)	(6,846)
Investment in / capital contributions from subsidiaries					0	0
Other					(1,331)	(87)
Net cash provided by financing activities					136,789	625,070
Increase (decrease) in cash and cash equivalents					(1,932)	352
Beginning of period		22,190		16,720	22,190	16,720
End of period	20,258		17,072		20,258	17,072
Intercompany Eliminations
Cash flows from operating activities:
Net loss including non-controlling interests	(114,473)		244,432		(61,416)	183,861
Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by (used in) operating activities:
Equity in earnings (loss) of subsidiaries	111,373		(247,085)		56,616	(188,263)
Depreciation, depletion and amortization	(4,958)		(3,643)		(10,123)	(6,969)
Loss on extinguishment of debt			0			0
(Gain) loss on sale of properties	0		0		0	0
Impairment	0		0		0	0
Deferred income taxes					0	0
Derivative instruments	0		0		0	0
Equity-based compensation expenses					0	0
Deferred financing costs amortization and other					0	0
Working capital and other changes:
Change in accounts receivable, net					(55,237)	(124,088)
Change in inventory					0	0
Change in prepaid expenses					0	0
Change in accounts payable, interest payable and accrued liabilities					55,237	124,088
Change in other assets and liabilities, net					0	0
Net cash provided by operating activities					(14,923)	(11,371)
Cash flows from investing activities:
Capital expenditures					0	0
Acquisitions					0	0
Derivative settlements					0
Proceeds from sale of properties						0
Derivative settlements						0
Other						0
Net cash used in investing activities					0	0
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities					0	0
Principal payments on revolving credit facility					0	0
Repurchase of senior unsecured notes						0
Proceeds from issuance of senior unsecured notes						0
Deferred financing costs					0	0
Purchases of treasury stock					0	0
Distributions to non-controlling interests					33,488	48,911
Investment in / capital contributions from subsidiaries					(18,565)	(37,540)
Other					0	0
Net cash provided by financing activities					14,923	11,371
Increase (decrease) in cash and cash equivalents					0	0
Beginning of period		0		0	0	0
End of period	0		0		0	0
Parent/ Issuer
Cash flows from operating activities:
Net loss including non-controlling interests	42,757		(320,204)		(72,125)	(319,614)
Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by (used in) operating activities:
Equity in earnings (loss) of subsidiaries	(73,855)		278,014		15,637	245,850
Depreciation, depletion and amortization	0		0		0	0
Loss on extinguishment of debt			13,651			13,651
(Gain) loss on sale of properties	0		0		0	0
Impairment	0		0		0	0
Deferred income taxes					(24,197)	(20,196)
Derivative instruments	0		0		0	0
Equity-based compensation expenses					13,933	13,340
Deferred financing costs amortization and other					8,246	7,892
Working capital and other changes:
Change in accounts receivable, net					57,909	96,993
Change in inventory					0	0
Change in prepaid expenses					100	58
Change in accounts payable, interest payable and accrued liabilities					1,643	3,335
Change in other assets and liabilities, net					0	0
Net cash provided by operating activities					1,146	41,309
Cash flows from investing activities:
Capital expenditures					0	0
Acquisitions					0	0
Derivative settlements					0
Proceeds from sale of properties						0
Derivative settlements						0
Other						0
Net cash used in investing activities					0	0
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities					0	0
Principal payments on revolving credit facility					0	0
Repurchase of senior unsecured notes						(423,143)
Proceeds from issuance of senior unsecured notes						400,000
Deferred financing costs					0	(6,524)
Purchases of treasury stock					(4,305)	(6,064)
Distributions to non-controlling interests					0	0
Investment in / capital contributions from subsidiaries					3,124	(5,619)
Other					0	38
Net cash provided by financing activities					(1,181)	(41,312)
Increase (decrease) in cash and cash equivalents					(35)	(3)
Beginning of period		179		178	179	178
End of period	144		175		144	175
Combined Guarantor Subsidiaries
Cash flows from operating activities:
Net loss including non-controlling interests	73,855		(278,014)		(15,637)	(245,850)
Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by (used in) operating activities:
Equity in earnings (loss) of subsidiaries	(37,518)		(30,929)		(72,253)	(57,587)
Depreciation, depletion and amortization	173,754		150,554		359,823	296,781
Loss on extinguishment of debt			0			0
(Gain) loss on sale of properties	276		(1,954)		3,198	(1,954)
Impairment	24		384,135		653	384,228
Deferred income taxes					32,814	(80,097)
Derivative instruments	(34,749)		120,285		82,862	191,401
Equity-based compensation expenses					3,772	624
Deferred financing costs amortization and other					3,582	2,522
Working capital and other changes:
Change in accounts receivable, net					(13,500)	(8,178)
Change in inventory					3,029	(4,629)
Change in prepaid expenses					3,668	95
Change in accounts payable, interest payable and accrued liabilities					(97,321)	(90,679)
Change in other assets and liabilities, net					(4,074)	(746)
Net cash provided by operating activities					290,616	385,931
Cash flows from investing activities:
Capital expenditures					(394,675)	(381,971)
Acquisitions					(5,781)	(524,255)
Derivative settlements					3,629
Proceeds from sale of properties						2,236
Derivative settlements						(96,823)
Other						(933)
Net cash used in investing activities					(396,827)	(1,001,746)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities					1,083,000	1,820,000
Principal payments on revolving credit facility					(1,020,000)	(1,239,000)
Repurchase of senior unsecured notes						0
Proceeds from issuance of senior unsecured notes						0
Deferred financing costs					(42)	(266)
Purchases of treasury stock					0	0
Distributions to non-controlling interests					0	0
Investment in / capital contributions from subsidiaries					42,642	33,695
Other					(883)	(125)
Net cash provided by financing activities					104,717	614,304
Increase (decrease) in cash and cash equivalents					(1,494)	(1,511)
Beginning of period		15,362		15,659	15,362	15,659
End of period	13,868		14,148		13,868	14,148
Combined Non-guarantor
Cash flows from operating activities:
Net loss including non-controlling interests	49,035		37,485		92,374	69,014
Adjustments to reconcile net income (loss) including non-controlling interests to net cash provided by (used in) operating activities:
Equity in earnings (loss) of subsidiaries	0		0		0	0
Depreciation, depletion and amortization	8,562		6,659		17,491	13,023
Loss on extinguishment of debt			0			0
(Gain) loss on sale of properties	0		0		0	0
Impairment	0		0		0	0
Deferred income taxes					0	0
Derivative instruments	0		0		0	0
Equity-based compensation expenses					219	166
Deferred financing costs amortization and other					417	104
Working capital and other changes:
Change in accounts receivable, net					(2,086)	29,407
Change in inventory					0	(92)
Change in prepaid expenses					150	420
Change in accounts payable, interest payable and accrued liabilities					3,927	4,105
Change in other assets and liabilities, net					(399)	0
Net cash provided by operating activities					112,093	116,147
Cash flows from investing activities:
Capital expenditures					(130,826)	(154,988)
Acquisitions					0	0
Derivative settlements					0
Proceeds from sale of properties						0
Derivative settlements						0
Other						0
Net cash used in investing activities					(130,826)	(154,988)
Cash flows from financing activities:
Proceeds from Revolving Credit Facilities					95,000	113,000
Principal payments on revolving credit facility					(5,000)	(26,000)
Repurchase of senior unsecured notes						0
Proceeds from issuance of senior unsecured notes						0
Deferred financing costs					(440)	0
Purchases of treasury stock					0	0
Distributions to non-controlling interests					(43,581)	(55,757)
Investment in / capital contributions from subsidiaries					(27,201)	9,464
Other					(448)	0
Net cash provided by financing activities					18,330	40,707
Increase (decrease) in cash and cash equivalents					(403)	1,866
Beginning of period		$ 6,649		$ 883	6,649	883
End of period	$ 6,246		$ 2,749		$ 6,246	$ 2,749