HighPoint Resources (HPR) 10-Q 5 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 22, 2019
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	333-222275
Entity Registrant Name	HighPoint Resources Corp
Entity Central Index Key	0001725526
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-3620361
Entity Address, Address Line One	555 17th Street, Suite 3700
Entity Address, City or Town	Denver
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80202
City Area Code	303
Local Phone Number	293-9100
Title of 12(b) Security	Common stock, $0.001 par value
Trading Symbol	HPR
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		213,885,715

CONSOLIDATED BALANCE SHEETS (UN

CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 16,112	$ 32,774
Accounts receivable, net of allowance for doubtful accounts	54,440	72,943
Derivative assets	12,164	81,166
Prepayments and other current assets	4,999	2,898
Total current assets	87,715	189,781
Property and equipment - at cost, successful efforts method for oil and gas properties:
Proved oil and gas properties	2,432,896	2,195,310
Unproved oil and gas properties, excluded from amortization	468,885	468,208
Furniture, equipment and other	28,987	20,662
Property, plant and equipment, gross	2,930,768	2,684,180
Accumulated depreciation, depletion, amortization and impairment	793,104	654,657
Total property and equipment, net	2,137,664	2,029,523
Derivative assets	7,062	27,289
Other noncurrent assets	6,247	5,867
Total	2,238,688	2,252,460
Current Liabilities:
Accounts payable and accrued liabilities	119,809	131,379
Amounts payable to oil and gas property owners	32,869	55,792
Production taxes payable	51,086	59,155
Current portion of long-term debt	0	1,859
Total current liabilities	203,764	248,185
Long-term debt, net of debt issuance costs	768,149	617,387
Asset retirement obligations	22,396	27,330
Deferred income taxes	109,933	139,534
Other noncurrent liabilities	18,053	7,926
Commitments and contingencies (Note 12)
Stockholders' Equity:
Common stock, $0.001 par value; authorized 400,000,000 shares; 213,898,734 and 212,477,101 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively, with 3,406,134 and 2,912,166 shares subject to restrictions, respectively	210	210
Additional paid-in capital	1,774,164	1,771,730
Retained earnings (accumulated deficit)	(657,981)	(559,842)
Treasury stock, at cost: zero shares at June 30, 2019 and December 31, 2018	0	0
Total stockholders' equity	1,116,393	1,212,098
Total liabilities and stockholders' equity	$ 2,238,688	$ 2,252,460

CONSOLIDATED BALANCE SHEETS (_2

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.001	$ 0.001
Common Stock, Shares Authorized	400,000,000	400,000,000
Common Stock, Shares, Issued	213,898,734	212,477,101
Common stock, shares outstanding (in shares)	213,898,734	212,477,101
Common stock, shares subject to restrictions (in shares)	3,406,134	2,912,166
Treasury stock, shares (in shares)	0	0

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Revenues:
Total operating revenues	$ 107,584	$ 110,398	$ 209,564	$ 191,208
Operating Expenses:
Production tax expense	8,905	9,684	12,798	14,859
Exploration expense	12	7	37	20
Impairment, dry hole costs and abandonment expense	995	108	1,317	425
(Gain) loss on sale of properties	2,906	564	2,901	972
Depreciation, depletion and amortization	72,612	52,175	145,222	93,160
Unused commitments	4,352	4,572	8,821	9,110
General and administrative expense	12,401	11,624	25,061	21,731
Merger transaction expense	0	1,277	2,414	6,040
Other operating expenses, net	4	9	(20)	48
Total operating expenses	114,701	88,626	224,065	161,641
Operating Income (Loss)	(7,117)	21,772	(14,501)	29,567
Other Income and Expense:
Interest and other income	154	701	468	1,392
Interest expense	(14,381)	(13,093)	(28,060)	(26,183)
Commodity derivative gain (loss)	19,544	(56,286)	(85,647)	(76,619)
Total other income and expense	5,317	(68,678)	(113,239)	(101,410)
Income (Loss) before Income Taxes	(1,800)	(46,906)	(127,740)	(71,843)
(Provision for) Benefit from Income Taxes	(110)	0	29,601	0
Net Income (Loss)	$ (1,910)	$ (46,906)	$ (98,139)	$ (71,843)
Net Income (Loss) Per Common Share, Basic (in dollars per share)	$ (0.01)	$ (0.22)	$ (0.47)	$ (0.43)
Net Income (Loss) Per Common Share, Diluted (in dollars per share)	$ (0.01)	$ (0.22)	$ (0.47)	$ (0.43)
Weighted Average Common Shares Outstanding, Basic	210,377,152	209,393,002	210,155,678	166,731,287
Weighted Average Common Shares Outstanding, Diluted	210,377,152	209,393,002	210,155,678	166,731,287
Oil, gas and NGL production
Operating Revenues:
Production and other revenues	$ 107,486	$ 110,118	$ 209,191	$ 190,949
Other operating revenues, net
Operating Revenues:
Production and other revenues	98	280	373	259
Lease operating expense
Operating Expenses:
Cost of goods and services	10,772	7,594	22,049	13,845
Gathering, transportation and processing expense
Operating Expenses:
Cost of goods and services	$ 1,742	$ 1,012	$ 3,465	$ 1,431

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating Activities:
Net Income (Loss)	$ (98,139)	$ (71,843)
Adjustments to reconcile to net cash provided by operations:
Depreciation, depletion and amortization	145,222	93,160
Deferred income taxes	(29,601)	0
Impairment, dry hole costs and abandonment expense	1,317	425
Commodity derivative (gain) loss	85,647	76,619
Settlements of commodity derivatives	3,656	(23,848)
Stock compensation and other non-cash charges	6,980	3,490
Amortization of deferred financing costs	1,275	1,131
(Gain) loss on sale of properties	2,901	972
Change in operating assets and liabilities:
Accounts receivable	18,475	(4,197)
Prepayments and other assets	(1,463)	(1,089)
Accounts payable, accrued and other liabilities	(6,733)	(36,033)
Amounts payable to oil and gas property owners	(22,923)	25,532
Production taxes payable	(8,069)	4,568
Net cash provided by (used in) operating activities	98,545	68,887
Investing Activities:
Additions to oil and gas properties, including acquisitions	(258,153)	(220,816)
Additions of furniture, equipment and other	(3,574)	(470)
Repayment of debt associated with merger, net of cash acquired	0	(53,357)
Proceeds from sale of properties	1,334	194
Other investing activities	(1,432)	336
Net cash provided by (used in) investing activities	(261,825)	(274,113)
Financing Activities:
Proceeds from debt	150,000	0
Principal payments on debt	(1,859)	(232)
Other financing activities	(1,523)	(1,629)
Net cash provided by (used in) financing activities	146,618	(1,861)
Increase (Decrease) in Cash and Cash Equivalents	(16,662)	(207,087)
Beginning Cash and Cash Equivalents	32,774	314,466
Ending Cash and Cash Equivalents	$ 16,112	$ 107,379

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Treasury Stock
Balance at Dec. 31, 2017	$ 598,554	$ 109	$ 1,279,507	$ (681,062)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock activity and shares exchanged for tax withholding	(1,462)				(1,462)
Stock-based compensation	4,185		4,185
Retirement of treasury stock	0		(1,462)		1,462
Issuance of common stock, merger	484,000	100	483,900
Net income (loss)	(24,937)			(24,937)
Balance at Mar. 31, 2018	1,060,340	209	1,766,130	(705,999)	0
Balance at Dec. 31, 2017	598,554	109	1,279,507	(681,062)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(71,843)
Balance at Jun. 30, 2018	1,015,203	209	1,767,899	(752,905)	0
Balance at Mar. 31, 2018	1,060,340	209	1,766,130	(705,999)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock activity and shares exchanged for tax withholding	(28)				(28)
Stock-based compensation	1,797		1,797
Retirement of treasury stock	0		(28)		28
Net income (loss)	(46,906)			(46,906)
Balance at Jun. 30, 2018	1,015,203	209	1,767,899	(752,905)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock activity and shares exchanged for tax withholding	(42)	1			(43)
Stock-based compensation	1,996		1,996
Retirement of treasury stock	0		(43)		43
Net income (loss)	(29,360)			(29,360)
Balance at Sep. 30, 2018	987,797	210	1,769,852	(782,265)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock activity and shares exchanged for tax withholding	(2)				(2)
Stock-based compensation	1,880		1,880
Retirement of treasury stock	0		(2)		2
Net income (loss)	222,423			222,423
Balance at Dec. 31, 2018	1,212,098	210	1,771,730	(559,842)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock activity and shares exchanged for tax withholding	(1,484)				(1,484)
Stock-based compensation	2,090		2,090
Retirement of treasury stock	0		(1,484)		1,484
Net income (loss)	(96,229)			(96,229)
Balance at Mar. 31, 2019	1,116,475	210	1,772,336	(656,071)	0
Balance at Dec. 31, 2018	1,212,098	210	1,771,730	(559,842)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(98,139)
Balance at Jun. 30, 2019	1,116,393	210	1,774,164	(657,981)	0
Balance at Mar. 31, 2019	1,116,475	210	1,772,336	(656,071)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Restricted stock activity and shares exchanged for tax withholding	(22)				(22)
Stock-based compensation	1,850		1,850
Retirement of treasury stock	0		(22)		22
Net income (loss)	(1,910)			(1,910)
Balance at Jun. 30, 2019	$ 1,116,393	$ 210	$ 1,774,164	$ (657,981)	$ 0

Organization

Organization	6 Months Ended
	Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization HighPoint Resources Corporation, a Delaware corporation, together with its wholly-owned subsidiary (collectively, the "Company"), is an independent oil and gas company engaged in the exploration, development and production of oil, natural gas and natural gas liquids ("NGLs"). The Company became the successor to Bill Barrett Corporation ("Bill Barrett"), on March 19, 2018, upon closing of the transactions contemplated by the Agreement and Plan of Merger, dated December 4, 2017 (the "Merger Agreement"), pursuant to which Bill Barrett combined with Fifth Creek Energy Operating Company, LLC ("Fifth Creek") (the "Merger"). As a result of the Merger, Bill Barrett became a wholly-owned subsidiary of HighPoint Resources Corporation and subsequently Bill Barrett changed its name to HighPoint Operating Corporation. The Company currently conducts its activities principally in the Denver Julesburg Basin ("DJ Basin") in Colorado. Except where the context indicates otherwise, references herein to the "Company" with respect to periods prior to the completion of the Merger refer to Bill Barrett and its subsidiaries.

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 Unaudited Consolidated Financial Statements include the accounts of the Company. These statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"). All intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, the accompanying consolidated financial statements include all adjustments (consisting of normal recurring accruals and adjustments) necessary to present fairly, in all material respects, the Company's interim results. However, operating results for the periods presented are not necessarily indicative of the results that may be expected for the full year. The Company's Annual Report on Form 10-K for the year ended December 31, 2018 includes certain definitions and a summary of significant accounting policies and should be read in conjunction with this Quarterly Report on Form 10-Q. Except as disclosed herein, there have been no material changes to the information disclosed in the notes to the consolidated financial statements included in the Annual Report on Form 10-K. Use of Estimates. In the course of preparing the Company's financial statements in accordance with GAAP, management makes various assumptions, judgments and estimates to determine the reported amount of assets, liabilities, revenues and expenses and in the disclosure of commitments and contingencies. Changes in these assumptions, judgments and estimates will occur as a result of the passage of time and the occurrence of future events and, accordingly, actual results could differ from amounts initially established. Areas requiring the use of assumptions, judgments and estimates relate to volumes of oil, natural gas and NGL reserves used in calculating depreciation, depletion and amortization ("DD&A"), the amount of expected future cash flows used in determining possible impairments of oil and gas properties and the amount of future capital costs used in these calculations. Assumptions, judgments and estimates also are required in determining the fair values of assets acquired and liabilities assumed in business combinations, asset retirement obligations, right-of-use assets and lease liabilities, deferred tax assets, the timing of dry hole costs, impairments of proved and unproved oil and gas properties and fair values of derivative instruments and stock-based payment awards. Accounts Receivable. Accounts receivable is comprised of the following: As of June 30, 2019 As of December 31, 2018 (in thousands) Oil, gas and NGL sales $ 42,248 $ 44,860 Due from joint interest owners 11,293 27,435 Other 900 754 Allowance for doubtful accounts (1 ) (106 ) Total accounts receivable $ 54,440 $ 72,943 Oil and Gas Properties. The following table sets forth the net capitalized costs and associated accumulated DD&A and non-cash impairments relating to the Company's oil, natural gas and NGL producing activities: As of June 30, 2019 As of December 31, 2018 (in thousands) Proved properties $ 670,270 $ 663,485 Wells and related equipment and facilities 1,647,456 1,438,092 Support equipment and facilities 90,690 75,392 Materials and supplies 24,480 18,341 Total proved oil and gas properties $ 2,432,896 $ 2,195,310 Unproved properties 321,206 328,409 Wells and facilities in progress 147,679 139,799 Total unproved oil and gas properties, excluded from amortization $ 468,885 $ 468,208 Accumulated depreciation, depletion, amortization and impairment (785,345 ) (642,645 ) Total oil and gas properties, net $ 2,116,436 $ 2,020,873 The Company reviews oil and natural gas properties for impairment on a quarterly basis or whenever events and circumstances indicate that a decline in the recoverability of their carrying value may have occurred. The Company estimates the expected undiscounted future net cash flows of its oil and gas properties using proved and risked probable and possible reserves based on an analysis of quantitative and qualitative factors existing as of the balance sheet date including the Company's development plans and best estimate of future production, commodity pricing, reserve risking, gathering and transportation deductions, production tax rates, lease operating expenses and future development costs. The Company compares such undiscounted future net cash flows to the carrying amount of the oil and gas properties to determine if the carrying amount is recoverable. If the undiscounted future net cash flows exceed the carrying amount of the oil and gas properties, no impairment is taken. If the carrying amount of a property exceeds the undiscounted future net cash flows, the Company will impair the carrying value to fair value. The factors used to determine fair value may include, but are not limited to, recent sales prices of comparable properties, indications from marketing activities, the present value of future revenues, net of estimated operating and development costs using estimates of reserves, future commodity pricing, future production estimates, anticipated capital expenditures and various discount rates commensurate with the risk and current market conditions associated with realizing the projected cash flows. Accounts Payable and Accrued Liabilities. Accounts payable and accrued liabilities are comprised of the following: As of June 30, 2019 As of December 31, 2018 (in thousands) Accrued drilling, completion and facility costs $ 75,984 $ 69,830 Accrued lease operating, gathering, transportation and processing expenses 7,398 6,970 Accrued general and administrative expenses 7,326 8,774 Accrued interest payable 6,852 6,758 Accrued merger transaction expenses — 550 Trade payables 13,757 31,057 Operating lease liability 730 — Other 7,762 7,440 Total accounts payable and accrued liabilities $ 119,809 $ 131,379 Environmental Liabilities. Environmental expenditures that relate to an existing condition caused by past operations and that do not contribute to current or future revenue generation are expensed. Environmental liabilities are accrued when environmental assessments and/or clean-ups are probable, and the costs can be reasonably estimated. Under Wyoming law, the Company is exposed to potential obligations for plugging and abandoning wells, and associated reclamation, for assets that were sold to other industry parties in prior years. When such third parties are unable to fulfill their contractual obligations to the Company as provided for in purchase and sale agreements, landowners, as well as the Bureau of Land Management, may demand that the Company perform such activities. Revenue Recognition. All of the Company's sales of oil, gas and NGLs are made under contracts with customers, whereby revenues are recognized when the Company satisfies its performance obligations and the customer obtains control of the product. Performance obligations under the Company's contracts with customers are typically satisfied at a point-in-time through monthly delivery of oil, gas and/or NGLs. Accordingly, at the end of the reporting period, the Company does not have any unsatisfied performance obligations. The Company's contracts with customers typically include variable consideration based on monthly pricing tied to local indices and volumes delivered in the current month. The nature of the Company's contracts with customers does not require the Company to constrain variable consideration for accounting purposes. As of June 30, 2019 , the Company had open contracts with customers with terms of 1 month to 19 years , as well as evergreen contracts that renew on a periodic basis if not canceled by the Company or the customer. The Company's contracts with customers typically require payment within one month of delivery. Under the Company's contracts with customers, natural gas and its components, including NGLs, are either sold to a midstream entity (which processes the natural gas and subsequently sells the resulting residue gas and NGLs) or are sold to a gas or NGL purchaser after being processed by a third party for a fee. Regardless of the contract structure type, the terms of these contracts compensate the Company for the value of the residue gas and NGLs at current market prices for each product. The Company's oil is sold to multiple oil purchasers at specific delivery points at or near the wellhead. All costs incurred to gather, transport and/or process the Company's oil, gas and NGLs after control has transferred to the customer are considered components of the consideration received from the customer and therefore are recorded in oil, gas and NGL production revenues in the Unaudited Consolidated Statements of Operations. All costs incurred prior to the transfer of control to the customer are included in gathering, transportation and processing expense in the Unaudited Consolidated Statements of Operations. Gas imbalances from the sale of natural gas are recorded on the basis of gas actually sold by the Company. If the Company's aggregate sales volumes for a well are greater (or less) than its proportionate share of production from the well, a liability (or receivable) is established to the extent there are insufficient proved reserves available to make-up the overproduced (or underproduced) imbalance. Imbalances have not been significant in the periods presented. Derivative Instruments and Hedging Activities. The Company periodically uses derivative financial instruments to achieve a more predictable cash flow from its oil, natural gas and NGL sales by reducing its exposure to price fluctuations. Derivative instruments are recorded at fair market value and are included in the Unaudited Consolidated Balance Sheets as assets or liabilities. Income Taxes. Income taxes are provided for the tax effects of transactions reported in the financial statements and consist of taxes currently payable plus deferred income taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred income tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible when assets are recovered or liabilities are settled. Deferred income taxes also include tax credits and net operating losses that are available to offset future income taxes. Deferred income taxes are measured by applying currently enacted tax rates. A valuation allowance is recorded if it is more likely than not that all or some portion of the Company's deferred tax assets will not be realized. The Company regularly assesses the realizability of the deferred tax assets considering all positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, planning strategies and results of recent operations. The assumptions about future taxable income require significant judgment to determine if a valuation allowance is required. Changes to the Company's development plans, changes in market prices for hydrocarbons, changes in operating results, or other factors could change the valuation allowance in future periods, resulting in recognition of a tax expense or benefit. The Company accounts for uncertainty in income taxes for tax positions taken or expected to be taken in a tax return. Only tax positions that meet the more-likely-than-not recognition threshold are recognized. The Company does not have any uncertain tax positions recorded as of June 30, 2019 . Comprehensive Income. The Company has no elements of other comprehensive income, therefore, the Company's net income (loss) on the Unaudited Consolidated Statements of Operations represents comprehensive income. Earnings/Loss Per Share. Basic net income (loss) per common share is calculated by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding during each period. Diluted net income (loss) per common share is calculated by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding and other dilutive securities. Potentially dilutive securities for the diluted net income per common share calculations consist of nonvested shares of common stock. As the Company was in a net loss position, all potentially dilutive securities were anti-dilutive for the three and six months ended June 30, 2019 and 2018 . The following table sets forth the calculation of basic and diluted income (loss) per share: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands, except per share amounts) Net income (loss) $ (1,910 ) $ (46,906 ) $ (98,139 ) $ (71,843 ) Basic weighted-average common shares outstanding in period 210,377 209,393 210,156 166,731 Diluted weighted-average common shares outstanding in period 210,377 209,393 210,156 166,731 Basic net income (loss) per common share $ (0.01 ) $ (0.22 ) $ (0.47 ) $ (0.43 ) Diluted net income (loss) per common share $ (0.01 ) $ (0.22 ) $ (0.47 ) $ (0.43 ) New Accounting Pronouncements. In August 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2018-13, Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement . The objective of this update is to improve the effectiveness of fair value measurement disclosures. ASU 2018-13 is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods. The standard will only impact the Company's disclosures. In June 2018, the FASB issued ASU 2018-07, Stock Compensation-Improvements to Non-employee Share-Based Payment Accounting . The objective of this update was to simplify several aspects of the accounting for non-employee share-based payment transactions resulting from expanding the scope of Topic 718, Compensation- Stock Compensation , to include share-based payment transactions for acquiring goods and services from non-employees. ASU 2018-07 was effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. The standard was adopted on January 1, 2019 and did not have a material impact on the Company's disclosures and financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments, Credit Losses . The objective of this update is to amend current impairment guidance by adding an impairment model (known as the current expected credit loss model ("CECL")) that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of lifetime expected credit losses, which the FASB believes will result in more timely recognition of such losses. ASU 2016-13 is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods. The Company does not believe the standard will have a material impact on the Company's financial statements. In February 2016, the FASB issued ASU 2016-02, Leases, followed by additional accounting standards updates that provided additional practical expedients and policy election options (collectively, Accounting Standards Codification Topic 842 ("ASC 842")). The objective of ASC 842 was to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. ASC 842 was effective for annual periods beginning after December 15, 2018 and interim periods within those annual periods. The Company adopted ASC 842 effective January 1, 2019 using the modified retrospective method and elected the option to not apply ASC 842 to comparative periods. The Company also elected the following practical expedients: • not to recognize lease assets or liabilities on the balance sheet when lease terms are less than 12 months, • carryforward previous conclusions related to current lease classification under the previous lease accounting standard to lease classification for these existing leases under ASC 842, • exclude from evaluation under ASC 842 land easements that existed or expired before adoption of ASC 842, and • to combine lease and non-lease components for certain asset classes. The adoption of ASC 842 resulted in the recognition of right-of-use assets of $8.6 million , and current and noncurrent lease liabilities of $0.3 million and $13.7 million , respectively, on the Unaudited Consolidated Balance Sheet as of January 1, 2019. The difference between the right-of-use assets and the total lease liability was related to lease incentives and deferred rent balances of $5.4 million , which were required to be netted against the right-of-use assets as of the implementation date of January 1, 2019. The Company's leases included office leases and other equipment, all classified as operating leases. The adoption of ASC 842 had no impact on the Company's Unaudited Consolidated Statements of Operations or Cash Flows. See Note 11 for additional information.

Supplemental Disclosures of Cas

Supplemental Disclosures of Cash Flow Information	6 Months Ended
	Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Supplemental Disclosures of Cash Flow Information	Supplemental Disclosures of Cash Flow Information Supplemental cash flow information is as follows: Six Months Ended June 30, 2019 2018 (in thousands) Cash paid for interest $ 26,689 $ 25,058 Cash paid for income taxes — — Cash paid for amounts included in the measurements of lease liabilities: Cash paid for operating leases 595 — Non-cash operating activities: Right-of-use assets obtained in exchange for lease obligations Operating leases (1) 14,955 — Non-cash investing and financing activities: Accounts payable and accrued liabilities - oil and gas properties 87,109 79,792 Change in asset retirement obligations, net of disposals (5,022 ) 7,887 Retirement of treasury stock (1,506 ) (1,490 ) Properties exchanged in non-cash transactions 4,561 — Issuance of common stock for Merger — 484,000 (1) Excludes the reclassifications of lease incentives and deferred rent balances.

Divestiture and Merger

Divestiture and Merger	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Divestiture and Merger	Divestiture and Merger Divestiture On May 1, 2019, the Company completed the sale of certain non-core assets, primarily low producing or shut-in vertical wells, in the DJ Basin in exchange for the relief of $7.7 million of plugging liabilities associated with these properties. The sale resulted in a loss of $2.3 million , which was recognized in loss on sale of properties in the Company's Unaudited Consolidated Statements of Operations. 2018 Merger with Fifth Creek Energy Operating Company, LLC On March 19, 2018, the Company completed the Merger with Fifth Creek. The Merger was effected through the issuance of 100 million shares of the Company's common stock, with a fair value of $484.0 million on the date of closing, and the repayment of $53.9 million of Fifth Creek debt. In connection with the Merger, the Company incurred costs of $19.2 million of severance, consulting, advisory, legal and other merger-related fees, all of which were expensed and included in merger transaction expense in the Company's Unaudited Consolidated Statements of Operations. Purchase Price Allocation The transaction was accounted for as a business combination, using the acquisition method, with the Company being the acquirer for accounting purposes. The following table represents the allocation of the total purchase price to the identifiable assets acquired and the liabilities assumed based on the estimated fair values at the acquisition date. The following table sets forth the Company's purchase price allocation: March 19, 2018 (in thousands) Purchase Price: Fair value of common stock issued $ 484,000 Plus: Repayment of Fifth Creek debt 53,900 Total purchase price 537,900 Plus Liabilities Assumed: Accounts payable and accrued liabilities 25,782 Current unfavorable contract 2,651 Other current liabilities 13,797 Asset retirement obligations 7,361 Long-term deferred tax liability 137,707 Long-term unfavorable contract 4,449 Other noncurrent liabilities 2,354 Total purchase price plus liabilities assumed $ 732,001 Fair Value of Assets Acquired: Cash 543 Accounts receivable 7,831 Oil and Gas Properties: Proved oil and gas properties 105,702 Unproved oil and gas properties 609,568 Asset retirement obligations 7,361 Furniture, equipment and other 931 Other noncurrent assets 65 Total asset value $ 732,001 The fair value measurements of oil and natural gas properties and asset retirement obligations are based on inputs that are not observable in the market and therefore represent Level 3 inputs. The fair values of proved oil and natural gas properties and asset retirement obligations were measured using valuation techniques that convert future cash flows to a single discounted amount. Significant inputs to the valuation of oil and natural gas properties included estimates of: (i) recoverable reserves; (ii) production rates; (iii) future operating and development costs; (iv) future commodity prices; and (v) a market-based weighted average cost of capital rate. The fair value of unproved properties was determined using a market approach utilizing recent transactions of a similar nature in the same basin. These inputs required significant judgments and estimates by management at the time of the valuation and are the most sensitive to possible future changes. The results of operations attributable to the merged companies are included in the Unaudited Consolidated Statements of Operations beginning on March 19, 2018. The Company generated revenues of approximately $12.3 million and $14.3 million from the Fifth Creek assets during the three and six months ended June 30, 2018 , respectively, and expenses of approximately $9.5 million and $11.3 million during the three and six months ended June 30, 2018 , respectively. Pro Forma Financial Information The following pro forma condensed combined financial information was derived from the historical financial statements of the Company and Fifth Creek and gives effect to the acquisition as if it had occurred on January 1, 2018. The below information reflects pro forma adjustments based on available information and certain assumptions that the Company believes are reasonable, including (i) the repayment of Fifth Creek's debt, (ii) depletion of Fifth Creek's fair-valued proved crude oil and natural gas properties, and (iii) the estimated tax impacts of the pro forma adjustments. Additionally, pro forma earnings for the three months ended June 30, 2018 were adjusted to exclude merger-related costs of $1.3 million incurred by the Company. Pro forma earnings for the six months ended June 30, 2019 and 2018 were adjusted to exclude merger-related costs of $2.4 million and $6.0 million , respectively, incurred by the Company and zero and $4.0 million , respectively, incurred by Fifth Creek. The pro forma results of operations do not include any cost savings or other synergies that may have occurred as a result of the acquisition or any estimated costs that have been incurred by the Company to integrate the Fifth Creek assets. The pro forma condensed combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the acquisition taken place on January 1, 2018; furthermore, the financial information is not intended to be a projection of future results. Three Months Ended June 30, Six Months Ended June 30, 2018 2019 2018 (in thousands, except per share data) Revenues $ 110,398 $ 209,564 $ 207,140 Net Income (Loss) (1) (45,629 ) (95,725 ) (69,733 ) Net Income (Loss) per Common Share, Basic (1) (0.22 ) (0.46 ) (0.33 ) Net Income (Loss) per Common Share, Diluted (1) (0.22 ) (0.46 ) (0.33 ) (1) The pro forma information for the six months ended June 30, 2019 includes adjustments for merger-related costs of $2.4 million . There were no pro forma adjustments subsequent to the three months ended March 31, 2019.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt The Company's outstanding debt is summarized below: As of June 30, 2019 As of December 31, 2018 Maturity Date Principal Debt Issuance Costs Carrying Amount Principal Debt Issuance Costs Carrying Amount (in thousands) Amended Credit Facility (1) September 14, 2023 $ 150,000 $ — $ 150,000 $ — $ — $ — 7.0% Senior Notes (2) October 15, 2022 350,000 (2,791 ) 347,209 350,000 (3,210 ) 346,790 8.75% Senior Notes (3) June 15, 2025 275,000 (4,060 ) 270,940 275,000 (4,403 ) 270,597 Lease Financing Obligation (4) August 10, 2020 — — — 1,859 — 1,859 Total Debt $ 775,000 $ (6,851 ) $ 768,149 $ 626,859 $ (7,613 ) $ 619,246 Less: Current Portion of Long-Term Debt (5) — — — 1,859 — 1,859 Total Long-Term Debt $ 775,000 $ (6,851 ) $ 768,149 $ 625,000 $ (7,613 ) $ 617,387 (1) The recorded value of the Amended Credit Facility approximates its fair value due to its floating rate structure and on financing terms currently available to the Company. (2) The aggregate estimated fair value of the 7.0% Senior Notes was approximately $332.6 million and $329.7 million as of June 30, 2019 and December 31, 2018 , respectively, based on reported market trades of these instruments. (3) The aggregate estimated fair value of the 8.75% Senior Notes was approximately $264.7 million as of June 30, 2019 and December 31, 2018 , respectively, based on reported market trades of these instruments. (4) The aggregate estimated fair value of the Lease Financing Obligation was approximately $1.8 million as of December 31, 2018 , based on market-based parameters of comparable term secured financing instruments. The Company exercised the early buyout option and purchased the equipment for $1.8 million on February 10, 2019. (5) As of December 31, 2018 , the current portion of long-term debt included the Lease Financing Obligation, which was settled on February 10, 2019. Amended Credit Facility The Company's revolving bank credit facility (the "Amended Credit Facility"), has a maturity date of September 14, 2023 , a maximum credit amount of $1.5 billion , an initial elected commitment amount of $500.0 million and an initial borrowing base of $500.0 million . The Company had $150.0 million and zero outstanding under the Amended Credit Facility as of June 30, 2019 and December 31, 2018 , respectively. As credit support for future payments under a contractual obligation, a $26.0 million letter of credit has been issued under the Amended Credit Facility, which reduced the available borrowing capacity under the Amended Credit Facility as of June 30, 2019 to $324.0 million . Interest rates are either adjusted LIBOR plus applicable margins of 1.5% to 2.5% or an alternate base rate plus applicable margins of 0.5% to 1.5% , and the unused commitment fee is between 0.375% and 0.5% . The applicable margin and the unused commitment fee rate are determined based on borrowing base utilization. The weighted average annual interest rate incurred on the Amended Credit Facility was 4.2% and 4.1% , respectively, for the three and six months ended June 30, 2019 . Senior Notes The issuer of the 7.0% Senior Notes and the 8.75% Senior Notes is HighPoint Operating Corporation (f/k/a Bill Barrett). Pursuant to supplemental indentures entered into in connection with the Merger, HighPoint Resources Corporation became a guarantor of the 7.0% Senior Notes and the 8.75% Senior Notes in March 2018. All covenants in the indentures governing the notes limit the activities of HighPoint Operating Corporation, including limitations on the ability to pay dividends, incur additional indebtedness, make restricted payments, create liens, sell assets or make loans to HighPoint Resources Corporation, but in most cases the covenants in the indentures are not applicable to HighPoint Resources Corporation. HighPoint Operating Corporation is currently in compliance with all covenants and has complied with all covenants since issuance. Nothing in the indentures governing the 7.0% Senior Notes or the 8.75% Senior Notes prohibits the Company from repurchasing any of the notes from time to time at any price in open market purchases, negotiated transactions or by tender offer or otherwise without any notice to or consent of the holders. Lease Financing Obligation Due 2020 The Company had a lease financing obligation with a balance of $1.9 million as of December 31, 2018 resulting from the Company's sale and subsequent lease back of certain compressors and related facilities owned by the Company (the "Lease Financing Obligation"). The Company elected to exercise the early buyout option and purchased the equipment for $1.8 million

Asset Retirement Obligations

Asset Retirement Obligations	6 Months Ended
	Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	Asset Retirement Obligations A reconciliation of the Company's asset retirement obligations for the six months ended June 30, 2019 is as follows (in thousands): As of December 31, 2018 $ 29,655 Liabilities incurred 2,347 Liabilities settled (789 ) Disposition of properties (1) (7,668 ) Accretion expense 771 Revisions to estimate 1,088 As of June 30, 2019 $ 25,404 Less: Current asset retirement obligations 3,008 Long-term asset retirement obligations $ 22,396 (1) See additional information regarding disposition of properties in Note 4.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (exit price). The Company uses market data or assumptions that market participants would use in pricing the asset or liability, including assumptions about risk. These inputs can be readily observable, market corroborated or generally unobservable. A fair value hierarchy was established 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). Level 1 – 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 – Quoted prices are available in active markets for similar assets or liabilities and in non-active markets for identical or similar instruments. Model-derived valuations have inputs that are observable or whose significant value drivers are observable. 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, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace. Level 3 – Pricing inputs include significant inputs that are generally less observable than objective sources. These inputs may be used with internally developed methodologies that result in management's best estimate of fair value. At each balance sheet date, the Company performs an analysis of all applicable instruments and includes in Level 3 all of those whose fair value is based on significant unobservable inputs. Assets and Liabilities Measured at Fair Value on a Recurring Basis Certain assets and liabilities are measured at fair value on a recurring basis in the Company's consolidated balance sheet. The following methods and assumptions were used to estimate the fair values: Cash equivalents – The highly liquid cash equivalents are recorded at fair value. Carrying value approximates fair value, which represents a Level 1 input. Deferred compensation plan – The Company maintains a non-qualified deferred compensation plan which allows certain management employees to defer receipt of a portion of their compensation. The Company maintains assets for the deferred compensation plan in a rabbi trust. The assets of the rabbi trust are invested in publicly traded mutual funds and are recorded in other current and other long-term assets in the Unaudited Consolidated Balance Sheets. The deferred compensation plan financial assets are reported at fair value based on active market quotes, which represent Level 1 inputs. Commodity derivatives – The fair value of crude oil, natural gas and NGL swaps and costless collars are valued based on an income approach using various assumptions, such as quoted forward prices for commodities and time value factors. These assumptions are observable in the marketplace throughout the full term of the contract, can be derived from observable data or are supported by observable levels at which transactions are executed in the marketplace, and are, therefore, designated as Level 2 inputs. The Company utilizes its counterparties' valuations to assess the reasonableness of its own valuations. At times, the Company utilizes an independent third party to perform the valuation. The commodity derivatives have been adjusted for non-performance risk. For applicable financial assets carried at fair value, the credit standing of the counterparties is analyzed and factored into the fair value measurement of those assets. In addition, the fair value measurement of a liability has been adjusted to reflect the nonperformance risk of the Company. The following tables set forth by level within the fair value hierarchy the Company's non-financial assets and liabilities that were measured at fair value on a recurring basis in the Unaudited Consolidated Balance Sheets. Level 1 Level 2 Level 3 Total (in thousands) As of June 30, 2019 Financial Assets Cash equivalents $ 4,344 $ — $ — $ 4,344 Deferred compensation plan 1,816 — — 1,816 Commodity derivatives — 26,387 — 26,387 Financial Liabilities Commodity derivatives — 7,236 — 7,236 As of December 31, 2018 Financial Assets Cash equivalents $ 12,188 $ — $ — $ 12,188 Deferred compensation plan 1,392 — — 1,392 Commodity derivatives — 109,494 — 109,494 Financial Liabilities Commodity derivatives — 1,039 — 1,039 Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis Certain assets and liabilities are measured at fair value on a nonrecurring basis in the Company's consolidated balance sheets. The following methods and assumptions were used to estimate the fair values: Oil and gas properties – Oil and gas property costs are evaluated for impairment and reduced to fair value when there is an indication that the carrying costs may not be recoverable. If an impairment is necessary, the fair value is estimated by using either a market approach based on recent sales prices of comparable properties and/or indications from marketing activities or by using the income valuation technique, which involves calculating the present value of future net revenues. The present value, net of estimated operating and development costs, is calculated using estimates of reserves, future commodity pricing, future production estimates, anticipated capital expenditures and various discount rates commensurate with the risk and current market conditions associated with realizing the projected cash flows, predominantly all of which are designated as Level 3 inputs within the fair value hierarchy. No properties were reduced to fair value during the three or six month periods ended June 30, 2019 and 2018 . Additional Fair Value Disclosures Long-term Debt – Long-term debt is not presented at fair value on the Unaudited Consolidated Balance Sheets, as it is recorded at carrying value, net of unamortized debt issuance costs. The fair values of the Company's fixed rate 7.0% Senior Notes and 8.75% Senior Notes totaled $597.3 million and $594.4 million as of June 30, 2019 and December 31, 2018 , respectively. The fair values of the Company's fixed rate Senior Notes are based on active market quotes, which represent Level 1 inputs. There is no active, public market for the Amended Credit Facility. The recorded value of the Amended Credit Facility approximates its fair value due to its floating rate structure based on the LIBOR spread, secured interest, and the Company's borrowing base utilization. The Amended Credit Facility had a balance of $150.0 million as of June 30, 2019 and zero as of 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 uses financial derivative instruments as part of its price risk management program to achieve a more predictable cash flow from its production revenues by reducing its exposure to commodity price fluctuations. The Company has entered into financial commodity swap contracts and costless collars related to the sale of a portion of the Company's production. The Company does not enter into derivative instruments for speculative or trading purposes. In addition to financial contracts, the Company may at times be party to various physical commodity contracts for the sale of oil, natural gas and NGLs that have varying terms and pricing provisions. These physical commodity contracts qualify for the normal purchase and normal sale exception and, therefore, are not subject to hedge or mark-to-market accounting. The financial impact of physical commodity contracts is included in oil, natural gas and NGL production revenues at the time of settlement. All derivative instruments, other than those that meet the normal purchase and normal sale exception, as mentioned above, are recorded at fair value and included on the Unaudited Consolidated Balance Sheets as assets or liabilities. The following table summarizes the location, as well as the gross and net fair value amounts, of all derivative instruments presented on the Unaudited Consolidated Balance Sheets as of the dates indicated. As of June 30, 2019 Balance Sheet Gross Amounts of Gross Amounts Net Amounts of (in thousands) Derivative assets (current) $ 18,554 $ (6,390 ) (1) $ 12,164 Derivative assets (noncurrent) 7,833 (771 ) (1) 7,062 Total derivative assets $ 26,387 $ (7,161 ) $ 19,226 Gross Amounts of Gross Amounts Net Amounts of (in thousands) Accounts payable and accrued liabilities $ (6,465 ) $ 6,390 (1) $ (75 ) Other noncurrent liabilities (771 ) 771 (1) — Total derivative liabilities $ (7,236 ) $ 7,161 $ (75 ) As of December 31, 2018 Balance Sheet Gross Amounts of Gross Amounts Net Amounts of (in thousands) Derivative assets (current) $ 82,205 $ (1,039 ) (1) $ 81,166 Derivative assets (noncurrent) 27,289 — (1) 27,289 Total derivative assets $ 109,494 $ (1,039 ) $ 108,455 Gross Amounts of Gross Amounts Net Amounts of (in thousands) Accounts payable and accrued liabilities $ (1,039 ) $ 1,039 (1) $ — Other noncurrent liabilities — — — Total derivative liabilities $ (1,039 ) $ 1,039 $ — (1) Asset and liability balances with the same counterparty are presented as a net asset or liability on the Unaudited Consolidated Balance Sheets. As of June 30, 2019 , the Company had swap contracts in place to hedge the following volumes for the periods indicated: July – December 2019 For the year 2020 For the year 2021 Derivative Weighted Average Price Derivative Volumes Weighted Average Price Derivative Volumes Weighted Average Price Oil (Bbls) 3,076,743 $ 59.01 4,434,500 $ 59.44 181,000 $ 57.13 Natural Gas (MMbtu) 1,288,000 $ 2.11 — $ — — $ — As of June 30, 2019 , the Company had cashless collars (purchased put options and written call options) in place to hedge the following volumes for the periods indicated: July – December 2019 Derivative Weighted Average Floor Price Weighted Average Ceiling Price Oil (Bbls) 552,000 $ 55.00 $ 77.56 The Company's derivative financial instruments are generally executed with major financial or commodities trading institutions. The instruments expose the Company to market and credit risks and may, at times, be concentrated with certain counterparties or groups of counterparties. The Company had derivatives in place with 10 different counterparties as of June 30, 2019 . Although notional amounts are used to express the volume of these contracts, the amounts potentially subject to credit risk in the event of non-performance by the counterparties are substantially smaller. The creditworthiness of counterparties is subject to continual review by management, and the Company believes all of these institutions currently are acceptable credit risks. Full performance is anticipated, and the Company has no past due receivables from any of its counterparties. It is the Company's policy to enter into derivative contracts with counterparties that are lenders in the Amended Credit Facility, affiliates of lenders in the Amended Credit Facility or potential lenders in the Amended Credit Facility. The Company's derivative contracts are documented using an industry standard contract known as a Schedule to the Master Agreement and International Swaps and Derivative Association, Inc. ("ISDA") Master Agreement or other contracts. Typical terms for these contracts include credit support requirements, cross default provisions, termination events and set-off provisions. The Company is not required to provide any credit support to its counterparties other than cross collateralization with the properties securing the Amended Credit Facility. The Company has set-off provisions in its derivative contracts with lenders under its Amended Credit Facility which, in the event of a counterparty default, allow the Company to set-off amounts owed to the defaulting counterparty under the Amended Credit Facility or other obligations against monies owed to the Company under derivative contracts. Where the counterparty is not a lender under the Company's Amended Credit Facility, the Company may not be able to set-off amounts owed by the Company under the Amended Credit Facility, even if such counterparty is an affiliate of a lender under such facility. The Company does not have any derivative balances that are offset by cash collateral.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company accounts for uncertainty in income taxes for tax positions taken or expected to be taken in a tax return in accordance with the FASB's rules on income taxes. The Company recognizes the tax benefit from an uncertain tax position only if it is more likely than not that the tax position will be sustained upon examination by the taxing authorities. During the three and six months ended June 30, 2019 and 2018 , the Company had no uncertain tax positions. The Company's policy is to classify accrued penalties and interest related to unrecognized tax benefits in the Company's income tax provision. The Company did not record any accrued interest or penalties associated with unrecognized tax benefits during the three and six months ended June 30, 2019 and 2018 . Income tax benefit for the three and six months ended June 30, 2019 and 2018 differs from the amounts that would be provided by applying the U.S. statutory income tax rates to pretax income or loss principally due to stock-based compensation, political lobbying expense, political contributions, nondeductible officer compensation, state income taxes, and for 2018, the effect of deferred tax asset valuation allowances. For the three and six months ended June 30, 2019 the Company recognized $0.1 million of income tax expense and $29.6 million of income tax benefit, respectively. No income tax expense or benefit was recognized for the three and six months ended June 30, 2018 as a result of a full valuation allowance against the deferred tax asset balance. The Company considers all available evidence (both positive and negative) to estimate whether sufficient future taxable income will be generated to permit the use of the existing deferred tax assets. Such evidence includes the scheduled reversal of deferred tax liabilities, projected future taxable income and tax planning strategies in making this assessment, and judgment is required in considering the relative weight of negative and positive evidence. The Company continues to monitor facts and circumstances in the reassessment of the likelihood that operating loss carryforwards, credits and other deferred tax assets will be utilized prior to their expiration.

Equity Incentive Compensation P

Equity Incentive Compensation Plans and Other Long-term Incentive Programs	6 Months Ended
	Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Equity Incentive Compensation Plans and Other Long-term Incentive Programs	Equity Incentive Compensation Plans and Other Long-term Incentive Programs The Company maintains various stock-based compensation plans and other employee benefits as discussed below. Stock-based compensation is measured at the grant date based on the value of the awards, and the fair value is recognized on a straight-line basis over the requisite service period (usually the vesting period). Nonvested shares of common stock generally vest ratably over a three year service period, and nonvested shares of common stock units vest over a one year service period. Cash-based compensation is measured at fair value at each reporting date and is recognized on a straight-line basis over the requisite service period (usually the vesting period). Cash-based awards generally have a cliff vest of three years . The following table presents the long-term equity and cash incentive compensation related to awards for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Nonvested common stock (1) $ 1,533 $ 1,520 $ 3,329 $ 2,850 Nonvested common stock units (1) 318 277 612 447 Nonvested performance cash units (2)(3) 445 451 1,077 378 Total $ 2,296 $ 2,248 $ 5,018 $ 3,675 (1) Unrecognized compensation expense as of June 30, 2019 was $10.1 million , which related to grants of nonvested shares of common stock that are expected to be recognized over a weighted-average period of 1.9 years . (2) The nonvested performance-based cash units are accounted for as liability awards with $1.4 million and $0.3 million in other noncurrent liabilities as of June 30, 2019 and December 31, 2018 , respectively, in the Unaudited Consolidated Balance Sheets. (3) Liability awards are fair valued at each reporting date. The expense for the period will increase or decrease based on updated fair values of these awards at each reporting date. Nonvested Equity and Cash Awards. The following tables present the equity and cash awards granted pursuant to the Company's various stock compensation plans. A summary of the Company's nonvested common stock awards for the three and six months ended June 30, 2019 and 2018 is presented below: Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Nonvested Common Stock Awards Shares Weighted Average Shares Weighted Average Outstanding at April 1, 3,431,780 $ 3.90 2,657,535 $ 5.14 Granted 6,000 2.66 221,025 7.08 Vested (30,031 ) 5.81 (15,724 ) 5.45 Forfeited or expired (1,615 ) 7.14 (4,558 ) 7.38 Outstanding at June 30, 3,406,134 3.88 2,858,278 5.28 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Nonvested Common Stock Awards Shares Weighted Average Shares Weighted Average Outstanding at January 1, 2,912,166 $ 5.27 1,394,868 $ 7.00 Granted 1,841,700 2.64 1,017,448 5.45 Modified (1) — — 1,146,305 4.84 Vested (1,329,630 ) 5.20 (667,932 ) 8.28 Forfeited or expired (18,102 ) 4.96 (32,411 ) 6.73 Outstanding at June 30, 3,406,134 3.88 2,858,278 5.28 (1) Due to the closing of the Merger, the 2016 and 2017 Performance Cash Programs were converted from nonvested performance-based cash units to nonvested common stock awards, resulting in an increase in nonvested common stock awards for the six months ended June 30, 2018 . A summary of the Company's nonvested common stock unit awards for the three and six months ended June 30, 2019 and 2018 is presented below: Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Nonvested Common Stock Unit Awards Units Weighted Average Units Weighted Average Outstanding at April 1, 311,237 $ 7.26 272,559 $ 6.37 Granted 628,380 1.87 158,885 6.87 Vested (143,514 ) 5.77 (129,027 ) 4.62 Outstanding at June 30, 796,103 3.27 302,417 7.37 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Nonvested Common Stock Unit Awards Units Weighted Average Units Weighted Average Outstanding at January 1, 311,237 $ 7.26 272,559 $ 6.37 Granted 643,084 1.88 162,083 6.83 Vested (158,218 ) 5.44 (132,225 ) 4.63 Outstanding at June 30, 796,103 3.27 302,417 7.37 A summary of the Company's nonvested performance-based cash unit awards for the three and six months ended June 30, 2019 and 2018 is presented below: Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Nonvested Performance-Based Cash Unit Awards Units Weighted Average Units Weighted Average Outstanding at April 1, 2,868,634 796,423 Granted — 49,833 Outstanding at June 30, 2,868,634 $ 1.82 846,256 $ 6.08 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Nonvested Performance-Based Cash Unit Awards Units Weighted Average Units Weighted Average Outstanding at January 1, 909,585 1,548,083 Granted 2,026,521 846,256 Performance goal adjustment (1) — 11,289 Modified (2) — (1,211,478 ) Vested — (286,652 ) Forfeited or expired (67,472 ) (61,242 ) Outstanding at June 30, 2,868,634 $ 1.82 846,256 $ 6.08 (1) The 2015 Program vested at 104.1% in excess of target level and resulted in additional units vesting in March 2018. These units are included in the vested line item for the six months ended June 30, 2018 . (2) Due to the closing of the Merger, the 2016 and 2017 Performance Cash Programs were converted from nonvested performance-based cash units to nonvested common stock awards, resulting in a decrease in nonvested performance-based cash units for the six months ended June 30, 2018 . The 2016 Program awards were converted based on performance through March 19, 2018, which resulted in 89% of the units converting to nonvested common stock awards or a reduction of 65,173 units converting to nonvested common stock awards. Performance Cash Program 2019 Program. In February 2019, the Compensation Committee of the Board of Directors of the Company approved a performance cash program (the "2019 Program") granting performance cash units that will settle in cash and are accounted for as liability awards. The performance-based awards contingently vest in February 2022, depending on the level at which the performance goal is achieved. The performance goal, which will be measured over the three -year period ending December 31, 2021, will be the Company's total shareholder return ("TSR") based on a matrix measurement of (1) the Company's absolute performance and (2) the Company's ranking relative to a defined peer group's individual TSRs ("Relative TSR"). The Company's absolute performance is measured against the December 31, 2018 closing share price of $2.49 . If the Company's absolute performance is less than 50% , the payout is zero . If the Company's absolute performance is 50% , the payout is 50% . If the Company's absolute performance is 100% , the payout is 100% , which is the maximum payout for this portion. If the Company's Relative TSR is less than 30% , the payout is zero . If the Company's Relative TSR is 30% or greater, the payout is equal to the Company's percentile rank up to 100% of the original grant. The Company's combined absolute performance and Relative TSR have a maximum vest of up to 200%

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Leases The Company adopted ASC 842 effective January 1, 2019 using the modified retrospective method and elected the option to not apply ASC 842 to comparative periods. See Note 2 - New Accounting Pronouncements for the impacts of adopting this new standard. Under ASC 842, a contract is or contains a lease when, (1) the contract contains an explicitly or implicitly identified asset and (2) the customer obtains substantially all of the economic benefits from the use of that underlying asset and directs how and for what purpose the asset is used during the term of the contract in exchange for consideration. The Company assesses whether an arrangement is or contains a lease at inception of the contract. For all leases, other than those that qualify for the short-term recognition exemption, the Company recognizes as of the lease commencement date on the balance sheet a liability for its obligation related to the lease and a corresponding asset representing the Company's right to use the underlying asset over the period of use. The Company currently has leases for office space and other equipment, all of which are classified as operating leases. The Company's leases have remaining terms of up to nine years . Certain lease agreements contain options to extend or early terminate the agreement. These options are used to calculate right-of-use asset and lease liability balances when it is reasonably certain that the Company will exercise these options. The discount rate used to calculate the present value of the future minimum lease payments is the rate implicit in the lease, when readily determinable. As most of the Company's leases do not provide an implicit rate, the Company utilizes its incremental borrowing rate. The Company has elected, for all classes of underlying assets, to not apply the balance sheet recognition requirements of ASC 842 to leases with a term of one year or less, and instead, the Company recognizes the lease payments in the income statement on a straight-line basis over the lease term. The Company has also made the election, for certain classes of underlying assets, to combine lease and non-lease components. However, for the majority of its leases, the Company accounts for lease and non-lease components separately. For the three and six months ended June 30, 2019 , lease cost was as follows: Three Months Ended June 30, Six Months Ended June 30, Lease Cost 2019 2019 (in thousands) Operating lease cost (1)(3) $ 569 $ 1,117 Short-term lease cost (2)(3) 4,167 10,386 Total lease cost $ 4,736 $ 11,503 (1) Operating lease cost was primarily included in general and administrative expense or lease operating expense on the Unaudited Consolidated Statements of Operations. (2) Short-term lease cost primarily includes leases for drilling rigs, which were capitalized to property, plant and equipment on the Unaudited Consolidated Balance Sheets. (3) A portion of the operating lease cost and a majority of the short-term lease cost represent gross amounts that the Company was financially committed to pay. However, the Company recorded in the financial statements its proportionate share based on the Company's working interest, which varies from property to property. Supplemental balance sheet information related to leases as of June 30, 2019 , was as follows: Operating Leases As of June 30, 2019 (in thousands) Right-of-use assets (1) $ 9,533 Accumulated amortization (2) (710 ) Total right-of-use assets (3) $ 8,823 Current lease liabilities (4) (730 ) Noncurrent lease liabilities (5) (14,027 ) Total lease liabilities (3) $ (14,757 ) Weighted average remaining lease term Operating leases (in years) 8.1 Weighted average discount rate Operating leases 5.6 % (1) Included in furniture, equipment and other in the Unaudited Consolidated Balance Sheets. (2) Included in accumulated depreciation, depletion, amortization and impairment in the Unaudited Consolidated Balance Sheets. (3) The difference between the right-of-use assets and total lease liabilities is primarily related to lease incentives and deferred rent balances, which were required to be netted against the right-of-use assets as of the implementation date of January 1, 2019. (4) Included in accounts payable and accrued liabilities in the Unaudited Consolidated Balance Sheets. (5) Included in other noncurrent liabilities in the Unaudited Consolidated Balance Sheets. Maturities of lease liabilities as of June 30, 2019 were as follows: As of June 30, 2019 (in thousands) 2019 $ 717 2020 2,040 2021 2,340 2022 2,031 2023 2,024 Thereafter 9,654 Total $ 18,806 Less: Interest (4,049 ) Present value of lease liabilities $ 14,757 Minimum future contractual payments for operating leases under the scope of ASC 840 as of December 31, 2018 were as follows: As of December 31, 2018 (in thousands) 2019 $ 2,583 2020 3,032 2021 3,331 2022 3,263 2023 3,036 Thereafter 13,112 Total $ 28,357

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Firm Transportation Agreements. The Company is party to two firm transportation contracts to provide capacity on natural gas pipeline systems. The contracts require the Company to pay minimum volume transportation charges through July 2021 regardless of the amount of pipeline capacity utilized by the Company. These monthly transportation payments are included in unused commitments expense in the Unaudited Consolidated Statements of Operations. As a result of previous divestitures in 2013 and 2014, the Company will likely not utilize the firm capacity on the natural gas pipelines. The Company is party to one firm pipeline transportation contract to provide capacity on an oil pipeline system. The contract requires the Company to pay minimum volume transportation charges from May 2020 through April 2025 regardless of the amount of pipeline capacity utilized by the Company. The amounts in the table below represent the Company's future minimum transportation charges: As of June 30, 2019 (in thousands) 2019 $ 8,974 2020 23,300 2021 19,798 2022 13,064 2023 14,600 Thereafter 19,440 Total $ 99,176 Gas Gathering and Processing Agreements. The Company is party to one minimum volume commitment and one reimbursement obligation. The minimum volume commitment requires the Company to deliver a minimum volume of natural gas to a midstream entity for gathering and processing. The contract requires the Company to pay a fee associated with the contracted volumes regardless of the amount delivered. The reimbursement obligation requires the Company to pay a monthly gathering and processing fee per Mcf of production over a one year period to reimburse a midstream entity for its costs to construct gas gathering and processing facilities. If the costs are not reimbursed by the Company via the monthly gathering and processing fees through August 2019, the Company must pay the difference. The amounts in the table below represent the Company's future minimum charges under both agreements: As of June 30, 2019 (in thousands) 2019 (1) $ 5,882 2020 2,167 2021 1,997 Thereafter — Total $ 10,046 (1) Includes $4.7 million associated with the reimbursement obligation discussed above. Other Commitments. The Company is party to one minimum volume commitment for fresh water. The minimum volume commitment requires the Company to purchase a minimum volume of fresh water from a water supplier. The contract requires the Company to pay a fee associated with the contracted volumes regardless of the amount delivered. The Company also has non-cancellable agreements for information technology services. Future minimum annual payments under these agreements are as follows: As of June 30, 2019 (in thousands) 2019 $ 2,959 2020 1,490 2021 745 2022 745 2023 744 Thereafter — Total $ 6,683 Litigation. The Company is subject to litigation, claims and governmental and regulatory proceedings arising in the ordinary course of business. It is the opinion of the Company's management that current claims and litigation involving the Company are not likely to have a material adverse effect on its Unaudited Consolidated Balance Sheet, Cash Flows or Statements of Operations.

Parent Guarantor

Parent Guarantor	6 Months Ended
	Jun. 30, 2019
Condensed Financial Information Disclosure [Abstract]
Parent Guarantor	Parent Guarantor The condensed consolidating financial information as of and for the periods ended June 30, 2019 and 2018 presents the results of operations, financial position and cash flows of HighPoint Resources Corporation, or parent guarantor, and HighPoint Operating Corporation (f/k/a Bill Barrett), or subsidiary issuer, as well as the consolidating adjustments necessary to present HighPoint Resources Corporation's results on a consolidated basis. The parent guarantor fully and unconditionally guarantees the debt securities of the subsidiary issuer. The indentures governing those securities limit the ability of the subsidiary issuer to pay dividends or otherwise provide funding to the parent guarantor. For the purpose of the following financial information, investments in subsidiaries are reflected in accordance with the equity method of accounting. The financial information may not necessarily be indicative of results of operations, cash flows, or financial position had the parent and the subsidiary operated as independent entities. Condensed Consolidating Balance Sheets As of June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Assets: Cash and cash equivalents $ — $ 16,112 $ — $ 16,112 Accounts receivable, net of allowance for doubtful accounts — 54,440 — 54,440 Other current assets — 17,163 — 17,163 Property and equipment, net — 2,137,664 — 2,137,664 Investment in subsidiaries 1,116,393 — (1,116,393 ) — Noncurrent assets — 13,309 — 13,309 Total assets $ 1,116,393 $ 2,238,688 $ (1,116,393 ) $ 2,238,688 Liabilities and Stockholders' Equity: Accounts payable and other accrued liabilities $ — $ 119,809 $ — $ 119,809 Other current liabilities — 83,955 — 83,955 Long-term debt — 768,149 — 768,149 Deferred income taxes — 109,933 — 109,933 Other noncurrent liabilities — 40,449 — 40,449 Stockholders' equity 1,116,393 1,116,393 (1,116,393 ) 1,116,393 Total liabilities and stockholders' equity $ 1,116,393 $ 2,238,688 $ (1,116,393 ) $ 2,238,688 As of December 31, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Assets: Cash and cash equivalents $ — $ 32,774 $ — $ 32,774 Accounts receivable, net of allowance for doubtful accounts — 72,943 — 72,943 Other current assets — 84,064 — 84,064 Property and equipment, net — 2,029,523 — 2,029,523 Investment in subsidiaries 1,212,098 — (1,212,098 ) — Noncurrent assets — 33,156 — 33,156 Total assets $ 1,212,098 $ 2,252,460 $ (1,212,098 ) $ 2,252,460 Liabilities and Stockholders' Equity: Accounts payable and other accrued liabilities $ — $ 131,379 $ — $ 131,379 Other current liabilities — 116,806 — 116,806 Long-term debt — 617,387 — 617,387 Deferred income taxes — 139,534 — 139,534 Other noncurrent liabilities — 35,256 — 35,256 Stockholders' equity 1,212,098 1,212,098 (1,212,098 ) 1,212,098 Total liabilities and stockholders' equity $ 1,212,098 $ 2,252,460 $ (1,212,098 ) $ 2,252,460 Condensed Consolidating Statements of Operations Three Months Ended June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 107,584 $ — $ 107,584 Operating expenses — (102,300 ) — (102,300 ) General and administrative — (12,401 ) — (12,401 ) Merger transaction expense — — — — Interest expense — (14,381 ) — (14,381 ) Interest income and other income (expense) — 19,698 — 19,698 Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (1,800 ) — (1,800 ) (Provision for) benefit from income taxes — (110 ) — (110 ) Equity in earnings (loss) of subsidiaries (1,910 ) — 1,910 — Net income (loss) $ (1,910 ) $ (1,910 ) $ 1,910 $ (1,910 ) Six Months Ended June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 209,564 $ — $ 209,564 Operating expenses — (196,590 ) — (196,590 ) General and administrative — (25,061 ) — (25,061 ) Merger transaction expense — (2,414 ) — (2,414 ) Interest expense — (28,060 ) — (28,060 ) Interest income and other income (expense) — (85,179 ) — (85,179 ) Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (127,740 ) — (127,740 ) (Provision for) benefit from income taxes — 29,601 — 29,601 Equity in earnings (loss) of subsidiaries (98,139 ) — 98,139 — Net income (loss) $ (98,139 ) $ (98,139 ) $ 98,139 $ (98,139 ) Three Months Ended June 30, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 110,398 $ — $ 110,398 Operating expenses — (75,725 ) — (75,725 ) General and administrative — (11,624 ) — (11,624 ) Merger transaction expense — (1,277 ) — (1,277 ) Interest expense — (13,093 ) — (13,093 ) Interest income and other income (expense) — (55,585 ) — (55,585 ) Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (46,906 ) — (46,906 ) (Provision for) benefit from income taxes — — — — Equity in earnings (loss) of subsidiaries (46,906 ) — 46,906 — Net income (loss) $ (46,906 ) $ (46,906 ) $ 46,906 $ (46,906 ) Six Months Ended June 30, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 191,208 $ — $ 191,208 Operating expenses — (133,870 ) — (133,870 ) General and administrative — (21,731 ) — (21,731 ) Merger transaction expense — (6,040 ) — (6,040 ) Interest expense — (26,183 ) — (26,183 ) Interest income and other income (expense) — (75,227 ) — (75,227 ) Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (71,843 ) — (71,843 ) (Provision for) benefit from income taxes — — — — Equity in earnings (loss) of subsidiaries (71,843 ) — 71,843 — Net income (loss) $ (71,843 ) $ (71,843 ) $ 71,843 $ (71,843 ) Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Cash flows from operating activities $ — $ 98,545 $ — $ 98,545 Cash flows from investing activities: Additions to oil and gas properties, including acquisitions — (258,153 ) — (258,153 ) Additions to furniture, fixtures and other — (3,574 ) — (3,574 ) Proceeds from sale of properties — 1,334 — 1,334 Other investing activities — (1,432 ) (1,432 ) Cash flows from financing activities: Proceeds from debt — 150,000 — 150,000 Principal payments on debt — (1,859 ) — (1,859 ) Other financing activities — (1,523 ) — (1,523 ) Change in cash and cash equivalents — (16,662 ) — (16,662 ) Beginning cash and cash equivalents — 32,774 — 32,774 Ending cash and cash equivalents $ — $ 16,112 $ — $ 16,112 Six Months Ended June 30, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Cash flows from operating activities $ — $ 68,887 $ — $ 68,887 Cash flows from investing activities: Additions to oil and gas properties, including acquisitions — (220,816 ) — (220,816 ) Additions to furniture, fixtures and other — (470 ) — (470 ) Payment of acquiree's debt associated with merger, net of cash acquired — (53,357 ) — (53,357 ) Proceeds from sale of properties — 194 — 194 Other investing activities — 336 — 336 Cash flows from financing activities: Principal payments on debt — (232 ) — (232 ) Other financing activities — (1,629 ) — (1,629 ) Change in cash and cash equivalents — (207,087 ) — (207,087 ) Beginning cash and cash equivalents — 314,466 — 314,466 Ending cash and cash equivalents $ — $ 107,379 $ — $ 107,379

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 Unaudited Consolidated Financial Statements include the accounts of the Company. These statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP"). All intercompany accounts and transactions have been eliminated in consolidation. In the opinion of management, the accompanying consolidated financial statements include all adjustments (consisting of normal recurring accruals and adjustments) necessary to present fairly, in all material respects, the Company's interim results. However, operating results for the periods presented are not necessarily indicative of the results that may be expected for the full year. The Company's Annual Report on Form 10-K for the year ended December 31, 2018 includes certain definitions and a summary of significant accounting policies and should be read in conjunction with this Quarterly Report on Form 10-Q. Except as disclosed herein, there have been no material changes to the information disclosed in the notes to the consolidated financial statements included in the Annual Report on Form 10-K.
Use of Estimates	Use of Estimates. In the course of preparing the Company's financial statements in accordance with GAAP, management makes various assumptions, judgments and estimates to determine the reported amount of assets, liabilities, revenues and expenses and in the disclosure of commitments and contingencies. Changes in these assumptions, judgments and estimates will occur as a result of the passage of time and the occurrence of future events and, accordingly, actual results could differ from amounts initially established. Areas requiring the use of assumptions, judgments and estimates relate to volumes of oil, natural gas and NGL reserves used in calculating depreciation, depletion and amortization ("DD&A"), the amount of expected future cash flows used in determining possible impairments of oil and gas properties and the amount of future capital costs used in these calculations. Assumptions, judgments and estimates also are required in determining the fair values of assets acquired and liabilities assumed in business combinations, asset retirement obligations, right-of-use assets and lease liabilities, deferred tax assets, the timing of dry hole costs, impairments of proved and unproved oil and gas properties and fair values of derivative instruments and stock-based payment awards.
Oil and Gas Properties	Oil and Gas Properties. The following table sets forth the net capitalized costs and associated accumulated DD&A and non-cash impairments relating to the Company's oil, natural gas and NGL producing activities: As of June 30, 2019 As of December 31, 2018 (in thousands) Proved properties $ 670,270 $ 663,485 Wells and related equipment and facilities 1,647,456 1,438,092 Support equipment and facilities 90,690 75,392 Materials and supplies 24,480 18,341 Total proved oil and gas properties $ 2,432,896 $ 2,195,310 Unproved properties 321,206 328,409 Wells and facilities in progress 147,679 139,799 Total unproved oil and gas properties, excluded from amortization $ 468,885 $ 468,208 Accumulated depreciation, depletion, amortization and impairment (785,345 ) (642,645 ) Total oil and gas properties, net $ 2,116,436 $ 2,020,873 The Company reviews oil and natural gas properties for impairment on a quarterly basis or whenever events and circumstances indicate that a decline in the recoverability of their carrying value may have occurred. The Company estimates the expected undiscounted future net cash flows of its oil and gas properties using proved and risked probable and possible reserves based on an analysis of quantitative and qualitative factors existing as of the balance sheet date including the Company's development plans and best estimate of future production, commodity pricing, reserve risking, gathering and transportation deductions, production tax rates, lease operating expenses and future development costs. The Company compares such undiscounted future net cash flows to the carrying amount of the oil and gas properties to determine if the carrying amount is recoverable. If the undiscounted future net cash flows exceed the carrying amount of the oil and gas properties, no impairment is taken. If the carrying amount of a property exceeds the undiscounted future net cash flows, the Company will impair the carrying value to fair value. The factors used to determine fair value may include, but are not limited to, recent sales prices of comparable properties, indications from marketing activities, the present value of future revenues, net of estimated operating and development costs using estimates of reserves, future commodity pricing, future production estimates, anticipated capital expenditures and various discount rates commensurate with the risk and current market conditions associated with realizing the projected cash flows.
Accounts Payable and Accrued Liabilities	Accounts Payable and Accrued Liabilities. Accounts payable and accrued liabilities are comprised of the following: As of June 30, 2019 As of December 31, 2018 (in thousands) Accrued drilling, completion and facility costs $ 75,984 $ 69,830 Accrued lease operating, gathering, transportation and processing expenses 7,398 6,970 Accrued general and administrative expenses 7,326 8,774 Accrued interest payable 6,852 6,758 Accrued merger transaction expenses — 550 Trade payables 13,757 31,057 Operating lease liability 730 — Other 7,762 7,440 Total accounts payable and accrued liabilities $ 119,809 $ 131,379
Environmental Liabilities	Environmental Liabilities.
Revenue Recognition	Revenue Recognition. All of the Company's sales of oil, gas and NGLs are made under contracts with customers, whereby revenues are recognized when the Company satisfies its performance obligations and the customer obtains control of the product. Performance obligations under the Company's contracts with customers are typically satisfied at a point-in-time through monthly delivery of oil, gas and/or NGLs. Accordingly, at the end of the reporting period, the Company does not have any unsatisfied performance obligations. The Company's contracts with customers typically include variable consideration based on monthly pricing tied to local indices and volumes delivered in the current month. The nature of the Company's contracts with customers does not require the Company to constrain variable consideration for accounting purposes. As of June 30, 2019 , the Company had open contracts with customers with terms of 1 month to 19 years , as well as evergreen contracts that renew on a periodic basis if not canceled by the Company or the customer. The Company's contracts with customers typically require payment within one month of delivery. Under the Company's contracts with customers, natural gas and its components, including NGLs, are either sold to a midstream entity (which processes the natural gas and subsequently sells the resulting residue gas and NGLs) or are sold to a gas or NGL purchaser after being processed by a third party for a fee. Regardless of the contract structure type, the terms of these contracts compensate the Company for the value of the residue gas and NGLs at current market prices for each product. The Company's oil is sold to multiple oil purchasers at specific delivery points at or near the wellhead. All costs incurred to gather, transport and/or process the Company's oil, gas and NGLs after control has transferred to the customer are considered components of the consideration received from the customer and therefore are recorded in oil, gas and NGL production revenues in the Unaudited Consolidated Statements of Operations. All costs incurred prior to the transfer of control to the customer are included in gathering, transportation and processing expense in the Unaudited Consolidated Statements of Operations. Gas imbalances from the sale of natural gas are recorded on the basis of gas actually sold by the Company. If the Company's aggregate sales volumes for a well are greater (or less) than its proportionate share of production from the well, a liability (or receivable) is established to the extent there are insufficient proved reserves available to make-up the overproduced (or underproduced) imbalance. Imbalances have not been significant in the periods presented.
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities. The Company periodically uses derivative financial instruments to achieve a more predictable cash flow from its oil, natural gas and NGL sales by reducing its exposure to price fluctuations. Derivative instruments are recorded at fair market value and are included in the Unaudited Consolidated Balance Sheets as assets or liabilities.
Income Taxes	Income Taxes. Income taxes are provided for the tax effects of transactions reported in the financial statements and consist of taxes currently payable plus deferred income taxes related to certain income and expenses recognized in different periods for financial and income tax reporting purposes. Deferred income tax assets and liabilities represent the future tax return consequences of those differences, which will either be taxable or deductible when assets are recovered or liabilities are settled. Deferred income taxes also include tax credits and net operating losses that are available to offset future income taxes. Deferred income taxes are measured by applying currently enacted tax rates. A valuation allowance is recorded if it is more likely than not that all or some portion of the Company's deferred tax assets will not be realized. The Company regularly assesses the realizability of the deferred tax assets considering all positive and negative evidence, including scheduled reversals of deferred tax liabilities, projected future taxable income, planning strategies and results of recent operations. The assumptions about future taxable income require significant judgment to determine if a valuation allowance is required. Changes to the Company's development plans, changes in market prices for hydrocarbons, changes in operating results, or other factors could change the valuation allowance in future periods, resulting in recognition of a tax expense or benefit. The Company accounts for uncertainty in income taxes for tax positions taken or expected to be taken in a tax return. Only tax positions that meet the more-likely-than-not recognition threshold are recognized. The Company does not have any uncertain tax positions recorded as of June 30, 2019 .
Comprehensive Income	Comprehensive Income. The Company has no elements of other comprehensive income, therefore, the Company's net income (loss) on the Unaudited Consolidated Statements of Operations represents comprehensive income.
Earnings/Loss Per Share	Earnings/Loss Per Share. Basic net income (loss) per common share is calculated by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding during each period. Diluted net income (loss) per common share is calculated by dividing net income (loss) attributable to common stock by the weighted average number of common shares outstanding and other dilutive securities. Potentially dilutive securities for the diluted net income per common share calculations consist of nonvested shares of common stock. As the Company was in a net loss position, all potentially dilutive securities were anti-dilutive for the three and six months ended June 30, 2019 and 2018 . The following table sets forth the calculation of basic and diluted income (loss) per share: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands, except per share amounts) Net income (loss) $ (1,910 ) $ (46,906 ) $ (98,139 ) $ (71,843 ) Basic weighted-average common shares outstanding in period 210,377 209,393 210,156 166,731 Diluted weighted-average common shares outstanding in period 210,377 209,393 210,156 166,731 Basic net income (loss) per common share $ (0.01 ) $ (0.22 ) $ (0.47 ) $ (0.43 ) Diluted net income (loss) per common share $ (0.01 ) $ (0.22 ) $ (0.47 ) $ (0.43 )
New Accounting Pronouncements	New Accounting Pronouncements. In August 2018, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2018-13, Disclosure Framework-Changes to the Disclosure Requirements for Fair Value Measurement . The objective of this update is to improve the effectiveness of fair value measurement disclosures. ASU 2018-13 is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods. The standard will only impact the Company's disclosures. In June 2018, the FASB issued ASU 2018-07, Stock Compensation-Improvements to Non-employee Share-Based Payment Accounting . The objective of this update was to simplify several aspects of the accounting for non-employee share-based payment transactions resulting from expanding the scope of Topic 718, Compensation- Stock Compensation , to include share-based payment transactions for acquiring goods and services from non-employees. ASU 2018-07 was effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. The standard was adopted on January 1, 2019 and did not have a material impact on the Company's disclosures and financial statements. In June 2016, the FASB issued ASU 2016-13, Financial Instruments, Credit Losses . The objective of this update is to amend current impairment guidance by adding an impairment model (known as the current expected credit loss model ("CECL")) that is based on expected losses rather than incurred losses. Under the new guidance, an entity recognizes as an allowance its estimate of lifetime expected credit losses, which the FASB believes will result in more timely recognition of such losses. ASU 2016-13 is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods. The Company does not believe the standard will have a material impact on the Company's financial statements. In February 2016, the FASB issued ASU 2016-02, Leases, followed by additional accounting standards updates that provided additional practical expedients and policy election options (collectively, Accounting Standards Codification Topic 842 ("ASC 842")). The objective of ASC 842 was to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclose key information about leasing arrangements. ASC 842 was effective for annual periods beginning after December 15, 2018 and interim periods within those annual periods. The Company adopted ASC 842 effective January 1, 2019 using the modified retrospective method and elected the option to not apply ASC 842 to comparative periods. The Company also elected the following practical expedients: • not to recognize lease assets or liabilities on the balance sheet when lease terms are less than 12 months, • carryforward previous conclusions related to current lease classification under the previous lease accounting standard to lease classification for these existing leases under ASC 842, • exclude from evaluation under ASC 842 land easements that existed or expired before adoption of ASC 842, and • to combine lease and non-lease components for certain asset classes. The adoption of ASC 842 resulted in the recognition of right-of-use assets of $8.6 million , and current and noncurrent lease liabilities of $0.3 million and $13.7 million , respectively, on the Unaudited Consolidated Balance Sheet as of January 1, 2019. The difference between the right-of-use assets and the total lease liability was related to lease incentives and deferred rent balances of $5.4 million , which were required to be netted against the right-of-use assets as of the implementation date of January 1, 2019. The Company's leases included office leases and other equipment, all classified as operating leases. The adoption of ASC 842 had no impact on the Company's Unaudited Consolidated Statements of Operations or Cash Flows. See Note 11 for additional information.

Leases (Policies)

Leases (Policies)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	Under ASC 842, a contract is or contains a lease when, (1) the contract contains an explicitly or implicitly identified asset and (2) the customer obtains substantially all of the economic benefits from the use of that underlying asset and directs how and for what purpose the asset is used during the term of the contract in exchange for consideration. The Company assesses whether an arrangement is or contains a lease at inception of the contract. For all leases, other than those that qualify for the short-term recognition exemption, the Company recognizes as of the lease commencement date on the balance sheet a liability for its obligation related to the lease and a corresponding asset representing the Company's right to use the underlying asset over the period of use.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Summary of Accounts Receivable	Accounts receivable is comprised of the following: As of June 30, 2019 As of December 31, 2018 (in thousands) Oil, gas and NGL sales $ 42,248 $ 44,860 Due from joint interest owners 11,293 27,435 Other 900 754 Allowance for doubtful accounts (1 ) (106 ) Total accounts receivable $ 54,440 $ 72,943
Net Capitalized Costs and Associated Accumulated DD&A and Non Cash Impairments	The following table sets forth the net capitalized costs and associated accumulated DD&A and non-cash impairments relating to the Company's oil, natural gas and NGL producing activities: As of June 30, 2019 As of December 31, 2018 (in thousands) Proved properties $ 670,270 $ 663,485 Wells and related equipment and facilities 1,647,456 1,438,092 Support equipment and facilities 90,690 75,392 Materials and supplies 24,480 18,341 Total proved oil and gas properties $ 2,432,896 $ 2,195,310 Unproved properties 321,206 328,409 Wells and facilities in progress 147,679 139,799 Total unproved oil and gas properties, excluded from amortization $ 468,885 $ 468,208 Accumulated depreciation, depletion, amortization and impairment (785,345 ) (642,645 ) Total oil and gas properties, net $ 2,116,436 $ 2,020,873
Accounts Payable and Accrued Liabilities	Accounts payable and accrued liabilities are comprised of the following: As of June 30, 2019 As of December 31, 2018 (in thousands) Accrued drilling, completion and facility costs $ 75,984 $ 69,830 Accrued lease operating, gathering, transportation and processing expenses 7,398 6,970 Accrued general and administrative expenses 7,326 8,774 Accrued interest payable 6,852 6,758 Accrued merger transaction expenses — 550 Trade payables 13,757 31,057 Operating lease liability 730 — Other 7,762 7,440 Total accounts payable and accrued liabilities $ 119,809 $ 131,379
Calculation of Basic and Diluted Earnings (Loss) Per Share	The following table sets forth the calculation of basic and diluted income (loss) per share: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands, except per share amounts) Net income (loss) $ (1,910 ) $ (46,906 ) $ (98,139 ) $ (71,843 ) Basic weighted-average common shares outstanding in period 210,377 209,393 210,156 166,731 Diluted weighted-average common shares outstanding in period 210,377 209,393 210,156 166,731 Basic net income (loss) per common share $ (0.01 ) $ (0.22 ) $ (0.47 ) $ (0.43 ) Diluted net income (loss) per common share $ (0.01 ) $ (0.22 ) $ (0.47 ) $ (0.43 )

Supplemental Disclosures of C_2

Supplemental Disclosures of Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2019
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental cash flow information is as follows: Six Months Ended June 30, 2019 2018 (in thousands) Cash paid for interest $ 26,689 $ 25,058 Cash paid for income taxes — — Cash paid for amounts included in the measurements of lease liabilities: Cash paid for operating leases 595 — Non-cash operating activities: Right-of-use assets obtained in exchange for lease obligations Operating leases (1) 14,955 — Non-cash investing and financing activities: Accounts payable and accrued liabilities - oil and gas properties 87,109 79,792 Change in asset retirement obligations, net of disposals (5,022 ) 7,887 Retirement of treasury stock (1,506 ) (1,490 ) Properties exchanged in non-cash transactions 4,561 — Issuance of common stock for Merger — 484,000 (1) Excludes the reclassifications of lease incentives and deferred rent balances.

Divestiture and Merger (Tables)

Divestiture and Merger (Tables)	6 Months Ended
	Jun. 30, 2019
Business Combinations [Abstract]
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed	The following table sets forth the Company's purchase price allocation: March 19, 2018 (in thousands) Purchase Price: Fair value of common stock issued $ 484,000 Plus: Repayment of Fifth Creek debt 53,900 Total purchase price 537,900 Plus Liabilities Assumed: Accounts payable and accrued liabilities 25,782 Current unfavorable contract 2,651 Other current liabilities 13,797 Asset retirement obligations 7,361 Long-term deferred tax liability 137,707 Long-term unfavorable contract 4,449 Other noncurrent liabilities 2,354 Total purchase price plus liabilities assumed $ 732,001 Fair Value of Assets Acquired: Cash 543 Accounts receivable 7,831 Oil and Gas Properties: Proved oil and gas properties 105,702 Unproved oil and gas properties 609,568 Asset retirement obligations 7,361 Furniture, equipment and other 931 Other noncurrent assets 65 Total asset value $ 732,001
Business Acquisition, Pro Forma Information	The pro forma condensed combined financial information has been included for comparative purposes and is not necessarily indicative of the results that might have actually occurred had the acquisition taken place on January 1, 2018; furthermore, the financial information is not intended to be a projection of future results. Three Months Ended June 30, Six Months Ended June 30, 2018 2019 2018 (in thousands, except per share data) Revenues $ 110,398 $ 209,564 $ 207,140 Net Income (Loss) (1) (45,629 ) (95,725 ) (69,733 ) Net Income (Loss) per Common Share, Basic (1) (0.22 ) (0.46 ) (0.33 ) Net Income (Loss) per Common Share, Diluted (1) (0.22 ) (0.46 ) (0.33 ) (1) The pro forma information for the six months ended June 30, 2019 includes adjustments for merger-related costs of $2.4 million . There were no pro forma adjustments subsequent to the three months ended March 31, 2019.

Long-Term Debt (Tables)

Long-Term Debt (Tables)	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Outstanding Debt	The Company's outstanding debt is summarized below: As of June 30, 2019 As of December 31, 2018 Maturity Date Principal Debt Issuance Costs Carrying Amount Principal Debt Issuance Costs Carrying Amount (in thousands) Amended Credit Facility (1) September 14, 2023 $ 150,000 $ — $ 150,000 $ — $ — $ — 7.0% Senior Notes (2) October 15, 2022 350,000 (2,791 ) 347,209 350,000 (3,210 ) 346,790 8.75% Senior Notes (3) June 15, 2025 275,000 (4,060 ) 270,940 275,000 (4,403 ) 270,597 Lease Financing Obligation (4) August 10, 2020 — — — 1,859 — 1,859 Total Debt $ 775,000 $ (6,851 ) $ 768,149 $ 626,859 $ (7,613 ) $ 619,246 Less: Current Portion of Long-Term Debt (5) — — — 1,859 — 1,859 Total Long-Term Debt $ 775,000 $ (6,851 ) $ 768,149 $ 625,000 $ (7,613 ) $ 617,387 (1) The recorded value of the Amended Credit Facility approximates its fair value due to its floating rate structure and on financing terms currently available to the Company. (2) The aggregate estimated fair value of the 7.0% Senior Notes was approximately $332.6 million and $329.7 million as of June 30, 2019 and December 31, 2018 , respectively, based on reported market trades of these instruments. (3) The aggregate estimated fair value of the 8.75% Senior Notes was approximately $264.7 million as of June 30, 2019 and December 31, 2018 , respectively, based on reported market trades of these instruments. (4) The aggregate estimated fair value of the Lease Financing Obligation was approximately $1.8 million as of December 31, 2018 , based on market-based parameters of comparable term secured financing instruments. The Company exercised the early buyout option and purchased the equipment for $1.8 million on February 10, 2019. (5) As of December 31, 2018 , the current portion of long-term debt included the Lease Financing Obligation, which was settled on February 10, 2019.

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	6 Months Ended
	Jun. 30, 2019
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Asset Retirement Obligations	A reconciliation of the Company's asset retirement obligations for the six months ended June 30, 2019 is as follows (in thousands): As of December 31, 2018 $ 29,655 Liabilities incurred 2,347 Liabilities settled (789 ) Disposition of properties (1) (7,668 ) Accretion expense 771 Revisions to estimate 1,088 As of June 30, 2019 $ 25,404 Less: Current asset retirement obligations 3,008 Long-term asset retirement obligations $ 22,396 (1) See additional information regarding disposition of properties in Note 4.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Balance Sheet Grouping	The following tables set forth by level within the fair value hierarchy the Company's non-financial assets and liabilities that were measured at fair value on a recurring basis in the Unaudited Consolidated Balance Sheets. Level 1 Level 2 Level 3 Total (in thousands) As of June 30, 2019 Financial Assets Cash equivalents $ 4,344 $ — $ — $ 4,344 Deferred compensation plan 1,816 — — 1,816 Commodity derivatives — 26,387 — 26,387 Financial Liabilities Commodity derivatives — 7,236 — 7,236 As of December 31, 2018 Financial Assets Cash equivalents $ 12,188 $ — $ — $ 12,188 Deferred compensation plan 1,392 — — 1,392 Commodity derivatives — 109,494 — 109,494 Financial Liabilities Commodity derivatives — 1,039 — 1,039

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair Value Amounts of Derivative Instruments	The following table summarizes the location, as well as the gross and net fair value amounts, of all derivative instruments presented on the Unaudited Consolidated Balance Sheets as of the dates indicated. As of June 30, 2019 Balance Sheet Gross Amounts of Gross Amounts Net Amounts of (in thousands) Derivative assets (current) $ 18,554 $ (6,390 ) (1) $ 12,164 Derivative assets (noncurrent) 7,833 (771 ) (1) 7,062 Total derivative assets $ 26,387 $ (7,161 ) $ 19,226 Gross Amounts of Gross Amounts Net Amounts of (in thousands) Accounts payable and accrued liabilities $ (6,465 ) $ 6,390 (1) $ (75 ) Other noncurrent liabilities (771 ) 771 (1) — Total derivative liabilities $ (7,236 ) $ 7,161 $ (75 ) As of December 31, 2018 Balance Sheet Gross Amounts of Gross Amounts Net Amounts of (in thousands) Derivative assets (current) $ 82,205 $ (1,039 ) (1) $ 81,166 Derivative assets (noncurrent) 27,289 — (1) 27,289 Total derivative assets $ 109,494 $ (1,039 ) $ 108,455 Gross Amounts of Gross Amounts Net Amounts of (in thousands) Accounts payable and accrued liabilities $ (1,039 ) $ 1,039 (1) $ — Other noncurrent liabilities — — — Total derivative liabilities $ (1,039 ) $ 1,039 $ — (1) Asset and liability balances with the same counterparty are presented as a net asset or liability on the Unaudited Consolidated Balance Sheets.
Financial Instruments for Hedging Volumes	As of June 30, 2019 , the Company had swap contracts in place to hedge the following volumes for the periods indicated: July – December 2019 For the year 2020 For the year 2021 Derivative Weighted Average Price Derivative Volumes Weighted Average Price Derivative Volumes Weighted Average Price Oil (Bbls) 3,076,743 $ 59.01 4,434,500 $ 59.44 181,000 $ 57.13 Natural Gas (MMbtu) 1,288,000 $ 2.11 — $ — — $ —
Cashless Collars
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Financial Instruments for Hedging Volumes	As of June 30, 2019 , the Company had cashless collars (purchased put options and written call options) in place to hedge the following volumes for the periods indicated: July – December 2019 Derivative Weighted Average Floor Price Weighted Average Ceiling Price Oil (Bbls) 552,000 $ 55.00 $ 77.56

Equity Incentive Compensation_2

Equity Incentive Compensation Plans and Other Long-term Incentive Programs (Tables)	6 Months Ended
	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-Cash Stock-Based Compensation Cost Related to Equity Awards	The following table presents the long-term equity and cash incentive compensation related to awards for the periods indicated: Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 (in thousands) Nonvested common stock (1) $ 1,533 $ 1,520 $ 3,329 $ 2,850 Nonvested common stock units (1) 318 277 612 447 Nonvested performance cash units (2)(3) 445 451 1,077 378 Total $ 2,296 $ 2,248 $ 5,018 $ 3,675 (1) Unrecognized compensation expense as of June 30, 2019 was $10.1 million , which related to grants of nonvested shares of common stock that are expected to be recognized over a weighted-average period of 1.9 years . (2) The nonvested performance-based cash units are accounted for as liability awards with $1.4 million and $0.3 million in other noncurrent liabilities as of June 30, 2019 and December 31, 2018 , respectively, in the Unaudited Consolidated Balance Sheets. (3) Liability awards are fair valued at each reporting date. The expense for the period will increase or decrease based on updated fair values of these awards at each reporting date.
Nonvested Equity Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Nonvested Share Activity	A summary of the Company's nonvested common stock awards for the three and six months ended June 30, 2019 and 2018 is presented below: Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Nonvested Common Stock Awards Shares Weighted Average Shares Weighted Average Outstanding at April 1, 3,431,780 $ 3.90 2,657,535 $ 5.14 Granted 6,000 2.66 221,025 7.08 Vested (30,031 ) 5.81 (15,724 ) 5.45 Forfeited or expired (1,615 ) 7.14 (4,558 ) 7.38 Outstanding at June 30, 3,406,134 3.88 2,858,278 5.28 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Nonvested Common Stock Awards Shares Weighted Average Shares Weighted Average Outstanding at January 1, 2,912,166 $ 5.27 1,394,868 $ 7.00 Granted 1,841,700 2.64 1,017,448 5.45 Modified (1) — — 1,146,305 4.84 Vested (1,329,630 ) 5.20 (667,932 ) 8.28 Forfeited or expired (18,102 ) 4.96 (32,411 ) 6.73 Outstanding at June 30, 3,406,134 3.88 2,858,278 5.28 (1) Due to the closing of the Merger, the 2016 and 2017 Performance Cash Programs were converted from nonvested performance-based cash units to nonvested common stock awards, resulting in an increase in nonvested common stock awards for the six months ended June 30, 2018 .
Nonvested Performance Cash Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Nonvested Performance-based Units Activity	A summary of the Company's nonvested performance-based cash unit awards for the three and six months ended June 30, 2019 and 2018 is presented below: Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Nonvested Performance-Based Cash Unit Awards Units Weighted Average Units Weighted Average Outstanding at April 1, 2,868,634 796,423 Granted — 49,833 Outstanding at June 30, 2,868,634 $ 1.82 846,256 $ 6.08 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Nonvested Performance-Based Cash Unit Awards Units Weighted Average Units Weighted Average Outstanding at January 1, 909,585 1,548,083 Granted 2,026,521 846,256 Performance goal adjustment (1) — 11,289 Modified (2) — (1,211,478 ) Vested — (286,652 ) Forfeited or expired (67,472 ) (61,242 ) Outstanding at June 30, 2,868,634 $ 1.82 846,256 $ 6.08 (1) The 2015 Program vested at 104.1% in excess of target level and resulted in additional units vesting in March 2018. These units are included in the vested line item for the six months ended June 30, 2018 . (2) Due to the closing of the Merger, the 2016 and 2017 Performance Cash Programs were converted from nonvested performance-based cash units to nonvested common stock awards, resulting in a decrease in nonvested performance-based cash units for the six months ended June 30, 2018 . The 2016 Program awards were converted based on performance through March 19, 2018, which resulted in 89% of the units converting to nonvested common stock awards or a reduction of 65,173 units converting to nonvested common stock awards.
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of Nonvested Share Activity	A summary of the Company's nonvested common stock unit awards for the three and six months ended June 30, 2019 and 2018 is presented below: Three Months Ended June 30, 2019 Three Months Ended June 30, 2018 Nonvested Common Stock Unit Awards Units Weighted Average Units Weighted Average Outstanding at April 1, 311,237 $ 7.26 272,559 $ 6.37 Granted 628,380 1.87 158,885 6.87 Vested (143,514 ) 5.77 (129,027 ) 4.62 Outstanding at June 30, 796,103 3.27 302,417 7.37 Six Months Ended June 30, 2019 Six Months Ended June 30, 2018 Nonvested Common Stock Unit Awards Units Weighted Average Units Weighted Average Outstanding at January 1, 311,237 $ 7.26 272,559 $ 6.37 Granted 643,084 1.88 162,083 6.83 Vested (158,218 ) 5.44 (132,225 ) 4.63 Outstanding at June 30, 796,103 3.27 302,417 7.37

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Lease, Cost	For the three and six months ended June 30, 2019 , lease cost was as follows: Three Months Ended June 30, Six Months Ended June 30, Lease Cost 2019 2019 (in thousands) Operating lease cost (1)(3) $ 569 $ 1,117 Short-term lease cost (2)(3) 4,167 10,386 Total lease cost $ 4,736 $ 11,503 (1) Operating lease cost was primarily included in general and administrative expense or lease operating expense on the Unaudited Consolidated Statements of Operations. (2) Short-term lease cost primarily includes leases for drilling rigs, which were capitalized to property, plant and equipment on the Unaudited Consolidated Balance Sheets. (3) A portion of the operating lease cost and a majority of the short-term lease cost represent gross amounts that the Company was financially committed to pay. However, the Company recorded in the financial statements its proportionate share based on the Company's working interest, which varies from property to property.
Supplemental Balance Sheet Information, Leases	Supplemental balance sheet information related to leases as of June 30, 2019 , was as follows: Operating Leases As of June 30, 2019 (in thousands) Right-of-use assets (1) $ 9,533 Accumulated amortization (2) (710 ) Total right-of-use assets (3) $ 8,823 Current lease liabilities (4) (730 ) Noncurrent lease liabilities (5) (14,027 ) Total lease liabilities (3) $ (14,757 ) Weighted average remaining lease term Operating leases (in years) 8.1 Weighted average discount rate Operating leases 5.6 % (1) Included in furniture, equipment and other in the Unaudited Consolidated Balance Sheets. (2) Included in accumulated depreciation, depletion, amortization and impairment in the Unaudited Consolidated Balance Sheets. (3) The difference between the right-of-use assets and total lease liabilities is primarily related to lease incentives and deferred rent balances, which were required to be netted against the right-of-use assets as of the implementation date of January 1, 2019. (4) Included in accounts payable and accrued liabilities in the Unaudited Consolidated Balance Sheets. (5) Included in other noncurrent liabilities in the Unaudited Consolidated Balance Sheets.
Lessee, Operating Lease, Liability, Maturity	Maturities of lease liabilities as of June 30, 2019 were as follows: As of June 30, 2019 (in thousands) 2019 $ 717 2020 2,040 2021 2,340 2022 2,031 2023 2,024 Thereafter 9,654 Total $ 18,806 Less: Interest (4,049 ) Present value of lease liabilities $ 14,757
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Minimum future contractual payments for operating leases under the scope of ASC 840 as of December 31, 2018 were as follows: As of December 31, 2018 (in thousands) 2019 $ 2,583 2020 3,032 2021 3,331 2022 3,263 2023 3,036 Thereafter 13,112 Total $ 28,357

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Schedule Of Gross Future Minimum Volume Charges [Table Text Block]	The amounts in the table below represent the Company's future minimum charges under both agreements: As of June 30, 2019 (in thousands) 2019 (1) $ 5,882 2020 2,167 2021 1,997 Thereafter — Total $ 10,046 (1) Includes $4.7 million
Gross Future Minimum Transportation Demand and Firm Processing Charges	The amounts in the table below represent the Company's future minimum transportation charges: As of June 30, 2019 (in thousands) 2019 $ 8,974 2020 23,300 2021 19,798 2022 13,064 2023 14,600 Thereafter 19,440 Total $ 99,176
Other Commitments	Future minimum annual payments under these agreements are as follows: As of June 30, 2019 (in thousands) 2019 $ 2,959 2020 1,490 2021 745 2022 745 2023 744 Thereafter — Total $ 6,683

Parent Guarantor (Tables)

Parent Guarantor (Tables)	6 Months Ended
	Jun. 30, 2019
Condensed Financial Information Disclosure [Abstract]
Schedule of Condensed Consolidating Balance Sheets	Condensed Consolidating Balance Sheets As of June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Assets: Cash and cash equivalents $ — $ 16,112 $ — $ 16,112 Accounts receivable, net of allowance for doubtful accounts — 54,440 — 54,440 Other current assets — 17,163 — 17,163 Property and equipment, net — 2,137,664 — 2,137,664 Investment in subsidiaries 1,116,393 — (1,116,393 ) — Noncurrent assets — 13,309 — 13,309 Total assets $ 1,116,393 $ 2,238,688 $ (1,116,393 ) $ 2,238,688 Liabilities and Stockholders' Equity: Accounts payable and other accrued liabilities $ — $ 119,809 $ — $ 119,809 Other current liabilities — 83,955 — 83,955 Long-term debt — 768,149 — 768,149 Deferred income taxes — 109,933 — 109,933 Other noncurrent liabilities — 40,449 — 40,449 Stockholders' equity 1,116,393 1,116,393 (1,116,393 ) 1,116,393 Total liabilities and stockholders' equity $ 1,116,393 $ 2,238,688 $ (1,116,393 ) $ 2,238,688 As of December 31, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Assets: Cash and cash equivalents $ — $ 32,774 $ — $ 32,774 Accounts receivable, net of allowance for doubtful accounts — 72,943 — 72,943 Other current assets — 84,064 — 84,064 Property and equipment, net — 2,029,523 — 2,029,523 Investment in subsidiaries 1,212,098 — (1,212,098 ) — Noncurrent assets — 33,156 — 33,156 Total assets $ 1,212,098 $ 2,252,460 $ (1,212,098 ) $ 2,252,460 Liabilities and Stockholders' Equity: Accounts payable and other accrued liabilities $ — $ 131,379 $ — $ 131,379 Other current liabilities — 116,806 — 116,806 Long-term debt — 617,387 — 617,387 Deferred income taxes — 139,534 — 139,534 Other noncurrent liabilities — 35,256 — 35,256 Stockholders' equity 1,212,098 1,212,098 (1,212,098 ) 1,212,098 Total liabilities and stockholders' equity $ 1,212,098 $ 2,252,460 $ (1,212,098 ) $ 2,252,460
Schedule of Condensed Consolidating Statements of Operations	Condensed Consolidating Statements of Operations Three Months Ended June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 107,584 $ — $ 107,584 Operating expenses — (102,300 ) — (102,300 ) General and administrative — (12,401 ) — (12,401 ) Merger transaction expense — — — — Interest expense — (14,381 ) — (14,381 ) Interest income and other income (expense) — 19,698 — 19,698 Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (1,800 ) — (1,800 ) (Provision for) benefit from income taxes — (110 ) — (110 ) Equity in earnings (loss) of subsidiaries (1,910 ) — 1,910 — Net income (loss) $ (1,910 ) $ (1,910 ) $ 1,910 $ (1,910 ) Six Months Ended June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 209,564 $ — $ 209,564 Operating expenses — (196,590 ) — (196,590 ) General and administrative — (25,061 ) — (25,061 ) Merger transaction expense — (2,414 ) — (2,414 ) Interest expense — (28,060 ) — (28,060 ) Interest income and other income (expense) — (85,179 ) — (85,179 ) Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (127,740 ) — (127,740 ) (Provision for) benefit from income taxes — 29,601 — 29,601 Equity in earnings (loss) of subsidiaries (98,139 ) — 98,139 — Net income (loss) $ (98,139 ) $ (98,139 ) $ 98,139 $ (98,139 ) Three Months Ended June 30, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 110,398 $ — $ 110,398 Operating expenses — (75,725 ) — (75,725 ) General and administrative — (11,624 ) — (11,624 ) Merger transaction expense — (1,277 ) — (1,277 ) Interest expense — (13,093 ) — (13,093 ) Interest income and other income (expense) — (55,585 ) — (55,585 ) Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (46,906 ) — (46,906 ) (Provision for) benefit from income taxes — — — — Equity in earnings (loss) of subsidiaries (46,906 ) — 46,906 — Net income (loss) $ (46,906 ) $ (46,906 ) $ 46,906 $ (46,906 ) Six Months Ended June 30, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Operating and other revenues $ — $ 191,208 $ — $ 191,208 Operating expenses — (133,870 ) — (133,870 ) General and administrative — (21,731 ) — (21,731 ) Merger transaction expense — (6,040 ) — (6,040 ) Interest expense — (26,183 ) — (26,183 ) Interest income and other income (expense) — (75,227 ) — (75,227 ) Income (loss) before income taxes and equity in earnings (loss) of subsidiaries — (71,843 ) — (71,843 ) (Provision for) benefit from income taxes — — — — Equity in earnings (loss) of subsidiaries (71,843 ) — 71,843 — Net income (loss) $ (71,843 ) $ (71,843 ) $ 71,843 $ (71,843 )
Schedule of Condensed Consolidating Statements of Cash Flows	Condensed Consolidating Statements of Cash Flows Six Months Ended June 30, 2019 Parent Subsidiary Intercompany Consolidated (in thousands) Cash flows from operating activities $ — $ 98,545 $ — $ 98,545 Cash flows from investing activities: Additions to oil and gas properties, including acquisitions — (258,153 ) — (258,153 ) Additions to furniture, fixtures and other — (3,574 ) — (3,574 ) Proceeds from sale of properties — 1,334 — 1,334 Other investing activities — (1,432 ) (1,432 ) Cash flows from financing activities: Proceeds from debt — 150,000 — 150,000 Principal payments on debt — (1,859 ) — (1,859 ) Other financing activities — (1,523 ) — (1,523 ) Change in cash and cash equivalents — (16,662 ) — (16,662 ) Beginning cash and cash equivalents — 32,774 — 32,774 Ending cash and cash equivalents $ — $ 16,112 $ — $ 16,112 Six Months Ended June 30, 2018 Parent Subsidiary Intercompany Consolidated (in thousands) Cash flows from operating activities $ — $ 68,887 $ — $ 68,887 Cash flows from investing activities: Additions to oil and gas properties, including acquisitions — (220,816 ) — (220,816 ) Additions to furniture, fixtures and other — (470 ) — (470 ) Payment of acquiree's debt associated with merger, net of cash acquired — (53,357 ) — (53,357 ) Proceeds from sale of properties — 194 — 194 Other investing activities — 336 — 336 Cash flows from financing activities: Principal payments on debt — (232 ) — (232 ) Other financing activities — (1,629 ) — (1,629 ) Change in cash and cash equivalents — (207,087 ) — (207,087 ) Beginning cash and cash equivalents — 314,466 — 314,466 Ending cash and cash equivalents $ — $ 107,379 $ — $ 107,379

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Right-of-use assets (1)	$ 8,823	$ 8,600
Current lease liabilities	730	300	$ 0
Noncurrent lease liabilities (4)	$ 14,027	13,700
Lease Incentives And Deferred Rent Reduction Of ROU Asset Beginning Balance		$ 5,400

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Summary of Accounts Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (1)	$ (106)
Accounts receivable	54,440	72,943
Accrued Oil, Gas, and NGL Sales
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable gross	42,248	44,860
Due from Joint Interest Owners
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable gross	11,293	27,435
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable gross	$ 900	$ 754

Summary of Significant Accoun_6

Summary of Significant Accounting Policies - Net Capitalized Costs and Associated Accumulated Depreciation, Depletion & Amortization and Non Cash Impairments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Proved properties	$ 670,270	$ 663,485
Wells and related equipment and facilities	1,647,456	1,438,092
Support equipment and facilities	90,690	75,392
Materials and supplies	24,480	18,341
Total proved oil and gas properties	2,432,896	2,195,310
Unproved properties	321,206	328,409
Wells and facilities in progress	147,679	139,799
Total unproved oil and gas properties, excluded from amortization	468,885	468,208
Accumulated depreciation, depletion, amortization and impairment	(785,345)	(642,645)
Total oil and gas properties, net	$ 2,116,436	$ 2,020,873

Summary of Significant Accoun_7

Summary of Significant Accounting Policies - Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Accrued drilling, completion and facility costs	$ 75,984		$ 69,830
Accrued lease operating, gathering, transportation and processing expenses	7,398		6,970
Accrued general and administrative expenses	7,326		8,774
Accrued interest payable	6,852		6,758
Accrued merger transaction expenses	0		550
Trade payables	13,757		31,057
Operating lease liability	730	$ 300	0
Other	7,762		7,440
Total accounts payable and accrued liabilities	$ 119,809		$ 131,379

Summary of Significant Accoun_8

Summary of Significant Accounting Policies - Revenue Recognition (Details)	6 Months Ended
	Jun. 30, 2019
Revenue from External Customer [Line Items]
Contract payment term	1 month
Minimum
Revenue from External Customer [Line Items]
Revenue contract term	1 month
Maximum
Revenue from External Customer [Line Items]
Revenue contract term	19 years

Summary of Significant Accoun_9

Summary of Significant Accounting Policies - Calculation of Basic and Diluted Earnings (Loss) Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Net Income (Loss)	$ (1,910)	$ (96,229)	$ 222,423	$ (29,360)	$ (46,906)	$ (24,937)	$ (98,139)	$ (71,843)
Basic weighted-average common shares outstanding in period (in shares)	210,377,152				209,393,002		210,155,678	166,731,287
Diluted weighted-average common shares outstanding in period (in shares)	210,377,152				209,393,002		210,155,678	166,731,287
Net Income (Loss) Per Common Share, Basic (in dollars per share)	$ (0.01)				$ (0.22)		$ (0.47)	$ (0.43)
Net Income (Loss) Per Common Share, Diluted (in dollars per share)	$ (0.01)				$ (0.22)		$ (0.47)	$ (0.43)

Supplemental Disclosures of C_3

Supplemental Disclosures of Cash Flow Information - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Supplemental Cash Flow Information [Abstract]
Cash paid for interest	$ 26,689	$ 25,058
Cash paid for income taxes	0	0
Cash paid for operating leases	595	0
Operating leases (1)	14,955	0
Non-cash investing and financing activities:
Accounts payable and accrued liabilities - oil and gas properties	87,109	79,792
Change in asset retirement obligations, net of disposals	(5,022)	7,887
Retirement of treasury stock	(1,506)	(1,490)
Properties exchanged in non-cash transactions	4,561	0
Issuance of common stock for Merger	$ 0	$ 484,000

Divestiture and Merger Narrativ

Divestiture and Merger Narrative (Details) - USD ($) $ in Thousands	Mar. 19, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019
Business Acquisition [Line Items]
Asset Retirement Obligation, Liabilities Settled				$ (7,668)
Gain (Loss) on Disposition of Oil and Gas Property		$ (2,906)	$ (564)	(2,901)	$ (972)
Merger transaction expense		$ 0	1,277	2,414	6,040
Fifth Creek
Business Acquisition [Line Items]
Business combination, pro forma information, revenue of acquiree since acquisition date, actual			12,300		14,300
Business combination, pro forma information, expenses of acquiree since acquisition date, actual			9,500		$ 11,300
Business acquisition, equity interest issued or issuable, number of shares					100,000,000
Fair value of common stock issued	$ 484,000
Plus: Repayment of Fifth Creek debt	$ 53,900
Merger transaction expense						$ 19,200
Fifth Creek | Acquisition-related Costs
Business Acquisition [Line Items]
Merger transaction expense			$ 1,300	0	$ 4,000
DJ Basin, Non-Core [Member]
Business Acquisition [Line Items]
Asset Retirement Obligation, Liabilities Settled				(7,700)
Gain (Loss) on Disposition of Oil and Gas Property				$ (2,300)

Divestiture and Merger Purchase

Divestiture and Merger Purchase Price Allocation (Details) - Fifth Creek $ in Thousands	Mar. 19, 2018USD ($)
Purchase Price:
Fair value of common stock issued	$ 484,000
Plus: Repayment of Fifth Creek debt	53,900
Total purchase price	537,900
Plus Liabilities Assumed:
Accounts payable and accrued liabilities	25,782
Current unfavorable contract	2,651
Other current liabilities	13,797
Asset retirement obligations	7,361
Long-term deferred tax liability	137,707
Long-term unfavorable contract	4,449
Other noncurrent liabilities	2,354
Total purchase price plus liabilities assumed	732,001
Fair Value of Assets Acquired:
Cash	543
Accounts receivable	7,831
Oil and Gas Properties:
Proved oil and gas properties	105,702
Unproved oil and gas properties	609,568
Asset retirement obligations	7,361
Furniture, equipment and other	931
Other noncurrent assets	65
Total asset value	$ 732,001

Divestiture and Merger Pro Form

Divestiture and Merger Pro Forma (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Combinations [Abstract]
Revenues	$ 110,398	$ 209,564	$ 207,140
Net Income (Loss) (1)	$ (45,629)	$ (95,725)	$ (69,733)
Net Income (Loss) per Common Share, Basic (in usd per share)	$ (0.22)	$ (0.46)	$ (0.33)
Net Income (Loss) per Common Share, Diluted (in usd per share)	$ (0.22)	$ (0.46)	$ (0.33)

Long-Term Debt - Outstanding De

Long-Term Debt - Outstanding Debt (Detail) - USD ($)	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 775,000,000	$ 625,000,000
Unamortized Debt Issuance Expense	(6,851,000)	(7,613,000)
Carrying Amount	768,149,000	617,387,000
Debt, fair value	$ 597,300,000	594,400,000
Amended Credit Facility
Debt Instrument [Line Items]
Maturity Date	Sep. 14, 2023
Debt Instrument, Face Amount	$ 150,000,000	0
Unamortized Debt Issuance Expense	0	0
Carrying Amount	150,000,000	0
7.0% Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	350,000,000	350,000,000
Unamortized Debt Issuance Expense	(2,791,000)	(3,210,000)
Carrying Amount	$ 347,209,000	346,790,000
Debt, stated interest rate	7.00%
Debt, fair value	$ 332,600,000	329,700,000
8.75% Senior Notes
Debt Instrument [Line Items]
Debt Instrument, Face Amount	275,000,000	275,000,000
Unamortized Debt Issuance Expense	(4,060,000)	(4,403,000)
Carrying Amount	$ 270,940,000	270,597,000
Debt, stated interest rate	8.75%
Debt, fair value	$ 264,700,000	264,700,000
Lease Financing Obligation
Debt Instrument [Line Items]
Debt Instrument, Face Amount	0	1,859,000
Unamortized Debt Issuance Expense	0	0
Carrying Amount	0	1,859,000
Debt, fair value		1,800,000
Long-term Debt
Debt Instrument [Line Items]
Debt Instrument, Face Amount	775,000,000	626,859,000
Unamortized Debt Issuance Expense	(6,851,000)	(7,613,000)
Carrying Amount	768,149,000	619,246,000
Current Portion of Long-Term Debt
Debt Instrument [Line Items]
Debt Instrument, Face Amount	0	1,859,000
Unamortized Debt Issuance Expense	0	0
Carrying Amount	$ 0	$ 1,859,000

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Debt, Weighted Average Interest Rate	4.20%	4.10%
Principal amount	$ 775,000,000	$ 775,000,000		$ 625,000,000
Debt, fair value	597,300,000	597,300,000		594,400,000
Purchase of equipment			$ 1,800,000
Maximum Credit Amount, Maximum Commitments That Could Be Elected By Lenders	$ 1,500,000,000	$ 1,500,000,000
Minimum
Debt Instrument [Line Items]
Revolving credit facility interest rate percent above LIBOR alternate interest rate		0.50%
Commitment fee percentage	0.375%	0.375%
Revolving Credit Facility Interest Rate Percent Above Libor		1.50%
Maximum
Debt Instrument [Line Items]
Revolving credit facility interest rate percent above LIBOR alternate interest rate		1.50%
Commitment fee percentage	0.50%	0.50%
Revolving Credit Facility Interest Rate Percent Above Libor		2.50%
Amended Credit Facility
Debt Instrument [Line Items]
Debt instrument, maturity date		Sep. 14, 2023
Line of credit facility, maximum borrowing capacity	$ 500,000,000	$ 500,000,000
Letters of credit issued amount	26,000,000	26,000,000
Line of credit facility, remaining borrowing capacity	324,000,000	324,000,000
Principal amount	150,000,000	150,000,000		0
7.0% Senior Notes
Debt Instrument [Line Items]
Principal amount	$ 350,000,000	$ 350,000,000		350,000,000
Debt, stated interest rate	7.00%	7.00%
Debt, fair value	$ 332,600,000	$ 332,600,000		329,700,000
8.75% Senior Notes
Debt Instrument [Line Items]
Principal amount	$ 275,000,000	$ 275,000,000		275,000,000
Debt, stated interest rate	8.75%	8.75%
Debt, fair value	$ 264,700,000	$ 264,700,000		264,700,000
Lease Financing Obligation
Debt Instrument [Line Items]
Principal amount	$ 0	$ 0		1,859,000
Debt, fair value				$ 1,800,000

Asset Retirement Obligations -

Asset Retirement Obligations - Schedule of Asset Retirement Obligations (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
As of December 31, 2018	$ 29,655
Liabilities incurred	2,347
Liabilities settled	(789)
Disposition of properties (1)	(7,668)
Accretion expense	771
Revisions to estimate	1,088
As of June 30, 2019	25,404
Less: Current asset retirement obligations	3,008
Long-term asset retirement obligations	$ 22,396

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value, Balance Sheet Grouping (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Financial Assets
Cash equivalents	$ 16,112	$ 32,774	$ 107,379	$ 314,466
Commodity derivatives	19,226	108,455
Financial Liabilities
Commodity derivatives	75	0
Total
Financial Assets
Cash equivalents	4,344	12,188
Deferred compensation plan	1,816	1,392
Commodity derivatives	26,387	109,494
Financial Liabilities
Commodity derivatives	7,236	1,039
Level 1
Financial Assets
Cash equivalents	4,344	12,188
Deferred compensation plan	1,816	1,392
Commodity derivatives	0	0
Financial Liabilities
Commodity derivatives	0	0
Level 2
Financial Assets
Cash equivalents	0	0
Deferred compensation plan	0	0
Commodity derivatives	26,387	109,494
Financial Liabilities
Commodity derivatives	7,236	1,039
Level 3
Financial Assets
Cash equivalents	0	0
Deferred compensation plan	0	0
Commodity derivatives	0	0
Financial Liabilities
Commodity derivatives	$ 0	$ 0

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) - USD ($)	Jun. 30, 2019	Dec. 31, 2018
Fair Value Measurements [Line Items]
Unproved Oil and Gas Property, Successful Effort Method	$ 468,885,000	$ 468,208,000
Debt, fair value	597,300,000	594,400,000
Debt Instrument, Face Amount	$ 775,000,000	625,000,000
7.0% Senior Notes
Fair Value Measurements [Line Items]
Debt, stated interest rate	7.00%
Debt, fair value	$ 332,600,000	329,700,000
Debt Instrument, Face Amount	$ 350,000,000	350,000,000
8.75% Senior Notes
Fair Value Measurements [Line Items]
Debt, stated interest rate	8.75%
Debt, fair value	$ 264,700,000	264,700,000
Debt Instrument, Face Amount	275,000,000	275,000,000
Amended Credit Facility
Fair Value Measurements [Line Items]
Debt Instrument, Face Amount	150,000,000	0
Lease Financing Obligation
Fair Value Measurements [Line Items]
Debt, fair value		1,800,000
Debt Instrument, Face Amount	$ 0	$ 1,859,000

Derivative Instruments - Fair V

Derivative Instruments - Fair Value Amounts of Derivative Instruments (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	$ 26,387	$ 109,494
Gross Amounts Offset in the Balance Sheet	(7,161)	(1,039)
Net Amounts of Assets Presented in the Balance Sheet	19,226	108,455
Gross Amounts of Recognized Liabilities	(7,236)	(1,039)
Gross Amounts Offset in the Balance Sheet	7,161	1,039
Net Amounts of Liabilities Presented in the Balance Sheet	(75)	0
Derivative assets (current)
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	18,554	82,205
Gross Amounts Offset in the Balance Sheet	(6,390)	(1,039)
Net Amounts of Assets Presented in the Balance Sheet	12,164	81,166
Derivative assets (noncurrent)
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Assets	7,833	27,289
Gross Amounts Offset in the Balance Sheet	(771)	0
Net Amounts of Assets Presented in the Balance Sheet	7,062	27,289
Accounts payable and accrued liabilities
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Liabilities	(6,465)	(1,039)
Gross Amounts Offset in the Balance Sheet	6,390	1,039
Net Amounts of Liabilities Presented in the Balance Sheet	(75)	0
Other noncurrent liabilities
Derivatives, Fair Value [Line Items]
Gross Amounts of Recognized Liabilities	(771)	0
Gross Amounts Offset in the Balance Sheet	771	0
Net Amounts of Liabilities Presented in the Balance Sheet	$ 0	$ 0

Derivative Instruments - Financ

Derivative Instruments - Financial Instruments for Hedging Volume (Detail)	Jun. 30, 2019MMBTU$ / unitbbl
July – December 2019 | Swap contracts | Oil (Bbls)
Derivative Instruments, Gain (Loss) [Line Items]
Hedge backed oil volume | bbl	3,076,743
Weighted Average Price (usd per unit)	59.01
July – December 2019 | Swap contracts | Natural Gas (MMbtu)
Derivative Instruments, Gain (Loss) [Line Items]
Hedge backed natural gas volume | MMBTU	1,288,000
Weighted Average Price (usd per unit)	2.11
July – December 2019 | Cashless Collars | Oil (Bbls)
Derivative Instruments, Gain (Loss) [Line Items]
Hedge backed oil volume | bbl	552,000
Weighted Average Floor Price (usd per unit)	55
Weighted Average Ceiling Price (usd per unit)	77.56
For the year 2020 | Swap contracts | Oil (Bbls)
Derivative Instruments, Gain (Loss) [Line Items]
Hedge backed oil volume | bbl	4,434,500
Weighted Average Price (usd per unit)	59.44
For the year 2020 | Swap contracts | Natural Gas (MMbtu)
Derivative Instruments, Gain (Loss) [Line Items]
Hedge backed natural gas volume | MMBTU	0
Weighted Average Price (usd per unit)	0
For the year 2021 | Swap contracts | Oil (Bbls)
Derivative Instruments, Gain (Loss) [Line Items]
Hedge backed oil volume | bbl	181,000
Weighted Average Price (usd per unit)	57.13
For the year 2021 | Swap contracts | Natural Gas (MMbtu)
Derivative Instruments, Gain (Loss) [Line Items]
Hedge backed natural gas volume | MMBTU	0
Weighted Average Price (usd per unit)	0

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2019counterparty
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Number of counterparties for hedges at period end	10

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating Loss Carryforwards [Line Items]
Income Tax Expense (Benefit)	$ 110	$ 0	$ (29,601)	$ 0

Equity Incentive Compensation_3

Equity Incentive Compensation Plans and Other Long-term Incentive Programs - Additional Information (Detail) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019USD ($)$ / sharesshares	Jun. 30, 2018shares	Jun. 30, 2019USD ($)$ / sharesshares	Jun. 30, 2018shares	Dec. 31, 2018USD ($)integer$ / shares
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares	$ 0.001		$ 0.001		$ 0.001
Unrecognized compensation cost | $	$ 10.1		$ 10.1
Weighted-average period (years)			1 year 10 months 24 days
Nonvested Equity Shares
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period			3 years
Total shares granted (in shares)	6,000	221,025	1,841,700	1,017,448
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)	30,031	15,724	1,329,630	667,932
Nonvested Equity Common Stock Units
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period			1 year
Cash-Based Award
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting period			3 years
Nonvested Performance Cash Units
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred Compensation Cash-based Arrangements, Liability, Classified, Noncurrent | $	$ 1.4		$ 1.4		$ 0.3
Total shares granted (in shares)	0	49,833	2,026,521	846,256
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			0	286,652
Two Thousand And Fifteen Performance Program [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percent of Performance Based Shares Vested					104.10%
Two Thousand And Sixteen Performance Program [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage Of Original Award Converted To Nonvested Common Stock Award					89.00%
Number Of Units Not Converted To Nonvested Common Stock | integer					65,173
Two Thousand Eighteen Performance Program [Domain]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Performance Goal Measurement Period			3 years
Closing Share Price, December 31, 2018 | $ / shares	$ 2.49		$ 2.49
Absolute Performance Is Less Than 50%			50.00%
Payout Is Zero If Absolute Performance Is Less Than 50%			0.00%
Absolute Performance Is 50%			50.00%
Payout Is 50% If Absolute Performance Is 50%			50.00%
Absolute Performance Is 100%			100.00%
Payout Is 100% If Absolute Performance Is 100%			100.00%
Relative TSR Is Less Than 30%			30.00%
Payout Is Zero If Relative TSR Is Less Than 30%			0.00%
Relative TSR Is 30% Or Greater			30.00%
Payout Is Equal To Percentile Rank, Up To 100%, If Relative TSR Is Greater Than 30%			100.00%
Two Thousand Eighteen Performance Program [Domain] | Absolute Performance and Relative TSR | Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Award vesting rights, percentage			200.00%

Equity Incentive Compensation_4

Equity Incentive Compensation Plans and Other Long-term Incentive Programs - Non-Cash Stock-Based Compensation Cost Related to Equity Awards (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock Based Compensation [Line Items]
Non-cash stock-based compensation equity awards	$ 2,296	$ 2,248	$ 5,018	$ 3,675
Nonvested Equity Shares [Member]
Stock Based Compensation [Line Items]
Non-cash stock-based compensation equity awards	1,533	1,520	3,329	2,850
Nonvested Equity Common Stock Units
Stock Based Compensation [Line Items]
Non-cash stock-based compensation equity awards	318	277	612	447
Nonvested Performance Cash Units
Stock Based Compensation [Line Items]
Cash Unit Based Compensation Awards	$ 445	$ 451	$ 1,077	$ 378

Equity Incentive Compensation_5

Equity Incentive Compensation Plans and Other Long-term Incentive Programs - Stock Options and Nonvested Equity Shares, Equity Awards Granted (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Nonvested Equity Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)	3,406,134	2,858,278	3,406,134	2,858,278	3,431,780	2,912,166	2,657,535	1,394,868
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share)	$ 3.88	$ 5.28	$ 3.88	$ 5.28	$ 3.90	$ 5.27	$ 5.14	$ 7
Total shares granted (in shares)	6,000	221,025	1,841,700	1,017,448
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 2.66	$ 7.08	$ 2.64	$ 5.45
Share-based Compensation Arrangement by Share-based Payment Award, Shares Modified in Period			0	1,146,305
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Modified Shares in Period, Weighted Average Grant Date Fair Value			$ 0	$ 4.84
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)	(30,031)	(15,724)	(1,329,630)	(667,932)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 5.81	$ 5.45	$ 5.20	$ 8.28
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)	(1,615)	(4,558)	(18,102)	(32,411)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value (in dollars per share)	$ 7.14	$ 7.38	$ 4.96	$ 6.73
Nonvested Performance Cash Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)	2,868,634	846,256	2,868,634	846,256	2,868,634	909,585	796,423	1,548,083
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share)	$ 1.82	$ 6.08	$ 1.82	$ 6.08
Total shares granted (in shares)	0	49,833	2,026,521	846,256
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)			0	(286,652)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (in shares)			(67,472)	(61,242)
Share-Based Compensation, Performance Goal Adjustment (in shares)			0	11,289
Share Based Compensation, Modification (in shares)			0	1,211,478
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in shares)	796,103	302,417	796,103	302,417	311,237	311,237	272,559	272,559
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value (in dollars per share)	$ 3.27	$ 7.37	$ 3.27	$ 7.37	$ 7.26	$ 7.26	$ 6.37	$ 6.37
Total shares granted (in shares)	628,380	158,885	643,084	162,083
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 1.87	$ 6.87	$ 1.88	$ 6.83
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (in shares)	(143,514)	(129,027)	(158,218)	(132,225)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value (in dollars per share)	$ 5.77	$ 4.62	$ 5.44	$ 4.63

Leases Additional Details (Deta

Leases Additional Details (Details)	Jun. 30, 2019
Leases [Abstract]
Term of contract	9 years

Leases Lease Cost (Details)

Leases Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease cost	$ 569	$ 1,117
Short-term lease cost	4,167	10,386
Total lease cost	$ 4,736	$ 11,503

Leases Supplemental Balance She

Leases Supplemental Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Leases [Abstract]
Right-of-use assets	$ 9,533
Accumulated amortization	(710)
Total right-of-use assets	8,823	$ 8,600
Current lease liabilities	730	300	$ 0
Noncurrent lease liabilities	14,027	$ 13,700
Total lease liabilities	$ 14,757
Weighted average remaining lease term
Operating leases (in years)	8 years 1 month 6 days
Weighted average discount rate
Operating leases	5.60%

Leases Maturity (Details)

Leases Maturity (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
2019	$ 717
2020	2,040
2021	2,340
2022	2,031
2023	2,024
Thereafter	9,654
Total	18,806
Less: Interest	4,049
Present value of lease liabilities	$ 14,757

Leases ASC 840 Future Operating

Leases ASC 840 Future Operating Lease Payments (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 2,583
2020	3,032
2021	3,331
2022	3,263
2023	3,036
Thereafter	13,112
Total	$ 28,357

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)integeragreement
Contingencies And Commitments [Line Items]
Reimbursement Obligation To Construct Gas Gathering And Processing Facilities | $	$ 4.7
Minimum Volume Commitment	1
Number of Firm Transportation Contracts | agreement	2
Number Of GTP Reimbursement Obligations	1
Number Of Other Commitments	1
Reimbursement Obligation, Reimbursement Period	1 year
Number Of Firm Pipeline Transportation Contracts	1

Commitments and Contingencies_2

Commitments and Contingencies - Gross Future Minimum Transportation Demand and Firm Processing Charges (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Commitments and Contingencies Disclosure [Abstract]
2019	$ 8,974
2020	23,300
2021	19,798
2022	13,064
2023	14,600
Thereafter	19,440
Total	$ 99,176

Commitments and Contingencies_3

Commitments and Contingencies - Other Commitments (Detail) $ in Thousands	Jun. 30, 2019USD ($)
Other Commitments [Line Items]
2019	$ 2,959
2020	1,490
2021	745
2022	745
2023	744
Thereafter	0
Total	$ 6,683

Commitments and Contingencies C

Commitments and Contingencies Commitments And Contingencies - Gross Future Minimum Volume Charges (Details) $ in Thousands	Jun. 30, 2019USD ($)
Commitments and Contingencies - Gross Future Minimum Volume Charges [Abstract]
2019	$ 5,882
2020	2,167
2021	1,997
Thereafter	0
Total	$ 10,046

Parent Guarantor - Schedule of

Parent Guarantor - Schedule of Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Assets:
Cash and cash equivalents	$ 16,112		$ 32,774		$ 107,379		$ 314,466
Accounts receivable, net of allowance for doubtful accounts	54,440		72,943
Other current assets	17,163		84,064
Property and equipment, net	2,137,664		2,029,523
Investment in subsidiaries	0		0
Noncurrent assets	13,309		33,156
Total	2,238,688		2,252,460
Liabilities and Stockholders' Equity:
Accounts payable and other accrued liabilities	119,809		131,379
Other current liabilities	83,955		116,806
Long-term debt, net of debt issuance costs	768,149		617,387
Deferred income taxes	109,933		139,534
Other noncurrent liabilities	40,449		35,256
Stockholders' equity	1,116,393	$ 1,116,475	1,212,098	$ 987,797	1,015,203	$ 1,060,340	598,554
Total liabilities and stockholders' equity	2,238,688		2,252,460
Intercompany Eliminations
Assets:
Cash and cash equivalents	0		0		0		0
Accounts receivable, net of allowance for doubtful accounts	0		0
Other current assets	0		0
Property and equipment, net	0		0
Investment in subsidiaries	(1,116,393)		(1,212,098)
Noncurrent assets	0		0
Total	(1,116,393)		(1,212,098)
Liabilities and Stockholders' Equity:
Accounts payable and other accrued liabilities	0		0
Other current liabilities	0		0
Long-term debt, net of debt issuance costs	0		0
Deferred income taxes	0		0
Other noncurrent liabilities	0		0
Stockholders' equity	(1,116,393)		(1,212,098)
Total liabilities and stockholders' equity	(1,116,393)		(1,212,098)
Parent Guarantor | Reportable Legal Entities
Assets:
Cash and cash equivalents	0		0		0		0
Accounts receivable, net of allowance for doubtful accounts	0		0
Other current assets	0		0
Property and equipment, net	0		0
Investment in subsidiaries	1,116,393		1,212,098
Noncurrent assets	0		0
Total	1,116,393		1,212,098
Liabilities and Stockholders' Equity:
Accounts payable and other accrued liabilities	0		0
Other current liabilities	0		0
Long-term debt, net of debt issuance costs	0		0
Deferred income taxes	0		0
Other noncurrent liabilities	0		0
Stockholders' equity	1,116,393		1,212,098
Total liabilities and stockholders' equity	1,116,393		1,212,098
Subsidiary Issuer | Reportable Legal Entities
Assets:
Cash and cash equivalents	16,112		32,774		$ 107,379		$ 314,466
Accounts receivable, net of allowance for doubtful accounts	54,440		72,943
Other current assets	17,163		84,064
Property and equipment, net	2,137,664		2,029,523
Investment in subsidiaries	0		0
Noncurrent assets	13,309		33,156
Total	2,238,688		2,252,460
Liabilities and Stockholders' Equity:
Accounts payable and other accrued liabilities	119,809		131,379
Other current liabilities	83,955		116,806
Long-term debt, net of debt issuance costs	768,149		617,387
Deferred income taxes	109,933		139,534
Other noncurrent liabilities	40,449		35,256
Stockholders' equity	1,116,393		1,212,098
Total liabilities and stockholders' equity	$ 2,238,688		$ 2,252,460

Parent Guarantor - Schedule o_2

Parent Guarantor - Schedule of Condensed Consolidating Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Operating revenues	$ 107,584				$ 110,398		$ 209,564	$ 191,208
Operating expenses	(102,300)				(75,725)		(196,590)	(133,870)
General and administrative	(12,401)				(11,624)		(25,061)	(21,731)
Merger transaction expense	0				(1,277)		(2,414)	(6,040)
Interest Expense	(14,381)				(13,093)		(28,060)	(26,183)
Interest income and other income (expense)	19,698				(55,585)		(85,179)	(75,227)
Income (loss) before income taxes and equity in earnings (loss) of subsidiaries	(1,800)				(46,906)		(127,740)	(71,843)
(Provision for) Benefit from Income Taxes	(110)				0		29,601	0
Equity in earnings (loss) of subsidiaries	0				0		0	0
Net Income (Loss)	(1,910)	$ (96,229)	$ 222,423	$ (29,360)	(46,906)	$ (24,937)	(98,139)	(71,843)
Intercompany Eliminations
Condensed Financial Statements, Captions [Line Items]
Operating revenues	0				0		0	0
Operating expenses	0				0		0	0
General and administrative	0				0		0	0
Merger transaction expense	0				0		0	0
Interest Expense	0				0		0	0
Interest income and other income (expense)	0				0		0	0
Income (loss) before income taxes and equity in earnings (loss) of subsidiaries	0				0		0	0
(Provision for) Benefit from Income Taxes	0				0		0	0
Equity in earnings (loss) of subsidiaries	1,910				46,906		98,139	71,843
Net Income (Loss)	1,910				46,906		98,139	71,843
Parent Guarantor | Reportable Legal Entities
Condensed Financial Statements, Captions [Line Items]
Operating revenues	0				0		0	0
Operating expenses	0				0		0	0
General and administrative	0				0		0	0
Merger transaction expense	0				0		0	0
Interest Expense	0				0		0	0
Interest income and other income (expense)	0				0		0	0
Income (loss) before income taxes and equity in earnings (loss) of subsidiaries	0				0		0	0
(Provision for) Benefit from Income Taxes	0				0		0	0
Equity in earnings (loss) of subsidiaries	(1,910)				(46,906)		(98,139)	(71,843)
Net Income (Loss)	(1,910)				(46,906)		(98,139)	(71,843)
Subsidiary Issuer | Reportable Legal Entities
Condensed Financial Statements, Captions [Line Items]
Operating revenues	107,584				110,398		209,564	191,208
Operating expenses	(102,300)				(75,725)		(196,590)	(133,870)
General and administrative	(12,401)				(11,624)		(25,061)	(21,731)
Merger transaction expense	0				(1,277)		(2,414)	(6,040)
Interest Expense	(14,381)				(13,093)		(28,060)	(26,183)
Interest income and other income (expense)	19,698				(55,585)		(85,179)	(75,227)
Income (loss) before income taxes and equity in earnings (loss) of subsidiaries	(1,800)				(46,906)		(127,740)	(71,843)
(Provision for) Benefit from Income Taxes	(110)				0		29,601	0
Equity in earnings (loss) of subsidiaries	0				0		0	0
Net Income (Loss)	$ (1,910)				$ (46,906)		$ (98,139)	$ (71,843)

Parent Guarantor - Schedule o_3

Parent Guarantor - Schedule of Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ 98,545	$ 68,887
Cash flows from investing activities:
Additions to oil and gas properties, including acquisitions	(258,153)	(220,816)
Additions to furniture, fixtures and other	(3,574)	(470)
Repayment of debt associated with merger, net of cash acquired	0	(53,357)
Proceeds from sale of properties	1,334	194
Other investing activities	(1,432)	336
Cash flows from financing activities:
Proceeds from debt	150,000
Principal payments on debt	(1,859)	(232)
Other financing activities	(1,523)	(1,629)
Increase (Decrease) in Cash and Cash Equivalents	(16,662)	(207,087)
Beginning Cash and Cash Equivalents	32,774	314,466
Ending Cash and Cash Equivalents	16,112	107,379
Intercompany Eliminations
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	0	0
Cash flows from investing activities:
Additions to oil and gas properties, including acquisitions	0	0
Additions to furniture, fixtures and other	0	0
Repayment of debt associated with merger, net of cash acquired		0
Proceeds from sale of properties	0	0
Other investing activities		0
Cash flows from financing activities:
Proceeds from debt	0
Principal payments on debt	0	0
Other financing activities	0	0
Increase (Decrease) in Cash and Cash Equivalents	0	0
Beginning Cash and Cash Equivalents	0	0
Ending Cash and Cash Equivalents	0	0
Parent Guarantor | Reportable Legal Entities
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	0	0
Cash flows from investing activities:
Additions to oil and gas properties, including acquisitions	0	0
Additions to furniture, fixtures and other	0	0
Repayment of debt associated with merger, net of cash acquired		0
Proceeds from sale of properties	0	0
Other investing activities	0	0
Cash flows from financing activities:
Proceeds from debt	0
Principal payments on debt	0	0
Other financing activities	0	0
Increase (Decrease) in Cash and Cash Equivalents	0	0
Beginning Cash and Cash Equivalents	0	0
Ending Cash and Cash Equivalents	0	0
Subsidiary Issuer | Reportable Legal Entities
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	98,545	68,887
Cash flows from investing activities:
Additions to oil and gas properties, including acquisitions	(258,153)	(220,816)
Additions to furniture, fixtures and other	(3,574)	(470)
Repayment of debt associated with merger, net of cash acquired		(53,357)
Proceeds from sale of properties	1,334	194
Other investing activities	(1,432)	336
Cash flows from financing activities:
Proceeds from debt	150,000
Principal payments on debt	(1,859)	(232)
Other financing activities	(1,523)	(1,629)
Increase (Decrease) in Cash and Cash Equivalents	(16,662)	(207,087)
Beginning Cash and Cash Equivalents	32,774	314,466
Ending Cash and Cash Equivalents	$ 16,112	$ 107,379