Range Resources (RRC) 10-Q 26 Oct 21 2021 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Oct. 22, 2021
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2021
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Registrant Name	RANGE RESOURCES CORPORATION
Entity Central Index Key	0000315852
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		259,794,788
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-12209
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	34-1312571
Entity Address, Address Line One	100 Throckmorton Street
Entity Address, Address Line Two	Suite 1200
Entity Address, City or Town	Fort Worth
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	76102
City Area Code	817
Local Phone Number	870-2601
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Title of 12(b) Security	Common Stock, (Par Value $0.01)
Trading Symbol	RRC
Security Exchange Name	NYSE

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents		$ 478	$ 458
Accounts receivable, less allowance for doubtful accounts of $393 and $3,004		366,695	252,642
Derivative assets		28,145	23,332
Other current assets		17,037	13,408
Total current assets		412,355	289,840
Derivative assets		25,518	16,680
Natural gas properties, successful efforts method	[1]	10,068,245	9,751,114
Accumulated depletion and depreciation	[1]	(4,330,289)	(4,064,305)
Natural gas and oil properties, successful efforts method, net	[1]	5,737,956	5,686,809
Other property and equipment		74,167	79,878
Accumulated depreciation and amortization		(70,734)	(75,717)
Other Property and equipment, net		3,433	4,161
Operating lease right-of-use assets		46,543	63,581
Other assets		78,384	75,865
Total assets		6,304,189	6,136,936
Current liabilities:
Accounts payable		151,919	132,421
Asset retirement obligations		6,689	6,689
Accrued liabilities		448,950	348,333
Accrued interest		43,514	54,742
Derivative liabilities		685,285	26,707
Divestiture contract obligation		92,061	92,593
Current maturities of long-term debt		217,909	45,356
Total current liabilities		1,646,327	706,841
Bank debt		23,976	693,123
Senior notes		2,706,495	2,329,745
Senior subordinated notes		0	17,384
Deferred tax liabilities		99,855	135,267
Derivative liabilities		85,436	9,746
Deferred compensation liabilities		112,235	81,481
Operating lease liabilities		27,839	43,155
Asset retirement obligations and other liabilities		86,247	91,157
Divestiture contract obligation		334,495	391,502
Total liabilities		5,122,905	4,499,401
Commitments and contingencies
Stockholders’ Equity
Preferred stock, $1 par, 10,000,000 shares authorized, none issued and outstanding		0	0
Common stock, $0.01 par, 475,000,000 shares authorized, _______ issued at September 30, 2021 and 256,353,887 issued at December 31, 2020		2,598	2,563
Common stock held in treasury, ______ shares at September 30, 2021 and 10,005,795 shares at December 31, 2020		(30,007)	(30,132)
Additional paid-in capital		5,707,382	5,684,268
Accumulated other comprehensive loss		(268)	(479)
Retained deficit		(4,498,421)	(4,018,685)
Total stockholders’ equity		1,181,284	1,637,535
Total liabilities and stockholders’ equity		$ 6,304,189	$ 6,136,936
[1]	Includes capitalized asset retirement costs and the associated accumulated amortization.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts on accounts receivable	$ 373,000	$ 3,004,000
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	475,000,000	475,000,000
Common stock, shares issued	259,787,004	256,353,887
Common stock held in treasury, shares	10,002,646	10,005,795

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues and other income:
Total Revenues from Contracts with Customers	$ 954,859,000	$ 424,035,000	$ 2,323,175,000	$ 1,267,629,000
Derivative fair value (loss) income	(652,220,000)	(124,690,000)	(959,782,000)	102,182,000
Total revenues and other income	302,639,000	299,345,000	1,363,393,000	1,369,811,000
Costs and expenses:
Production and ad valorem taxes	7,140,000	6,106,000	20,179,000	20,682,000
Brokered natural gas and marketing	105,838,000	47,967,000	247,177,000	118,752,000
Exploration	5,881,000	8,086,000	16,447,000	23,190,000
Abandonment and impairment of unproved properties	2,000,000	5,667,000	7,206,000	16,604,000
General and administrative	49,061,000	38,153,000	127,307,000	118,695,000
Exit and termination costs	11,789,000	521,633,000	9,557,000	533,525,000
Deferred compensation plan	34,278,000	6,237,000	89,551,000	10,287,000
Interest	56,809,000	47,999,000	170,974,000	144,141,000
Loss (gain) on early extinguishment of debt		7,821,000	98,000	(14,093,000)
Depletion, depreciation and amortization	93,116,000	96,167,000	272,128,000	303,779,000
Impairment of proved properties and other assets	0	1,955,000	0	78,955,000
(Gain) loss on the sale of assets	(78,000)	(9,230,000)	(724,000)	(112,443,000)
Total costs and expenses	682,589,000	1,084,644,000	1,871,237,000	2,149,766,000
Loss before income taxes	(379,950,000)	(785,299,000)	(507,844,000)	(779,955,000)
Income tax expense (benefit):
Current	4,484,000	0	7,221,000	(366,000)
Deferred	(34,167,000)	(36,509,000)	(35,477,000)	(29,411,000)
Total (benefit) expense for income taxes	(29,683,000)	(36,509,000)	(28,256,000)	(29,777,000)
Net loss	$ (350,267,000)	$ (748,790,000)	$ (479,588,000)	$ (750,178,000)
Net loss per common share:
Basic	$ (1.44)	$ (3.12)	$ (1.98)	$ (3.10)
Diluted	$ (1.44)	$ (3.12)	$ (1.98)	$ (3.10)
Weighted average common shares outstanding:
Basic	243,311	239,895	242,692	241,770
Diluted	243,311	239,895	242,692	241,770
Natural Gas, NGLs and Oil Sales
Revenues and other income:
Total Revenues from Contracts with Customers	$ 849,305,000	$ 381,553,000	$ 2,074,507,000	$ 1,162,907,000
Brokered Natural Gas, Marketing and Other
Revenues and other income:
Total Revenues from Contracts with Customers	105,554,000	42,482,000	248,668,000	104,722,000
Direct Operating
Costs and expenses:
Costs and expenses	20,245,000	19,515,000	57,653,000	75,944,000
Transportation, Gathering, Processing and Compression
Costs and expenses:
Costs and expenses	$ 296,510,000	$ 268,108,000	$ 853,684,000	$ 831,748,000

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (350,267)	$ (748,790)	$ (479,588)	$ (750,178)
Postretirement benefits:
Actuarial gain				7
Amortization of prior service costs	92	92	277	277
Income tax expense	(22)	(22)	(66)	(70)
Total comprehensive income (loss)	$ (350,197)	$ (748,720)	$ (479,377)	$ (749,964)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Operating activities:
Net income (loss)	$ (479,588,000)	$ (750,178,000)
Adjustments to reconcile net income (loss) to net cash provided from operating activities:
Deferred income tax (benefit) expense	(35,477,000)	(29,411,000)
Depletion, depreciation and amortization and impairment of proved properties	272,128,000	382,734,000
Abandonment and impairment of unproved properties	7,206,000	16,604,000
Derivative fair value loss (income)	959,782,000	(102,182,000)
Cash settlements on derivative financial instruments	(239,165,000)	305,243,000
Divestiture contract obligation accretion, net of gain	8,467,000	486,689,000
Allowance for bad debt	0	400,000
Amortization of deferred financing costs and other	6,253,000	5,023,000
Deferred and stock-based compensation	119,946,000	38,380,000
Gain on the sale of assets	(724,000)	(112,443,000)
Loss (gain) on early extinguishment of debt	98,000	(14,093,000)
Changes in working capital:
Accounts receivable	(116,204,000)	91,343,000
Other current assets	(3,574,000)	(5,786,000)
Accounts payable	34,313,000	(52,820,000)
Accrued liabilities and other	(58,172,000)	(80,529,000)
Net cash provided from operating activities	475,289,000	178,974,000
Investing activities:
Additions to natural gas properties	(311,709,000)	(321,849,000)
Additions to field service assets	(720,000)	(2,493,000)
Acreage purchases	(20,302,000)	(18,554,000)
Proceeds from disposal of assets	237,000	246,083,000
Purchases of marketable securities held by the deferred compensation plan	(24,396,000)	(14,855,000)
Proceeds from the sales of marketable securities held by the deferred compensation plan	27,974,000	20,974,000
Net cash used in investing activities	(328,916,000)	(90,694,000)
Financing activities:
Borrowings on credit facilities	1,250,000,000	1,676,000,000
Repayments on credit facilities	(1,922,000,000)	(1,447,000,000)
Issuance of senior notes	600,000,000	850,000,000
Repayment of senior or senior subordinated notes	(63,324,000)	(1,120,634,000)
Treasury stock purchases	0	(22,992,000)
Debt issuance costs	(8,799,000)	(12,735,000)
Taxes paid for shares withheld	(9,267,000)	(2,841,000)
Change in cash overdrafts	1,515,000	(8,797,000)
Proceeds from the sales of common stock held by the deferred compensation plan	5,522,000	690,000
Net cash (used in) provided from financing activities	(146,353,000)	(88,309,000)
Increase in cash and cash equivalents	20,000	(29,000)
Cash and cash equivalents at beginning of period	458,000	546,000
Cash and cash equivalents at end of period	$ 478,000	$ 517,000

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Common Stock	Common stock held in treasury	Additional paid-in capital	Retained deficit	Accumulated other comprehensive loss
Beginning balance at Dec. 31, 2019	$ 2,347,488	$ 2,514	$ (7,236)	$ 5,659,832	$ (3,306,834)	$ (788)
Beginning balance Shares at Dec. 31, 2019		251,439,000
Issuance of common stock	(1,364)	$ 42	0	(1,406)	0	0
Issuance of common stock, shares		4,246,000
Stock-based compensation expense	5,963	$ 0	0	5,963	0	0
Treasury stock	(22,547)	0	(22,514)	(33)	0	0
Other comprehensive income	73	0	0	0	0	73
Net income (loss)	166,195	0	0	0	166,195	0
Ending balance at Mar. 31, 2020	2,495,808	$ 2,556	(29,750)	5,664,356	(3,140,639)	(715)
Ending balance Shares at Mar. 31, 2020		255,685,000
Beginning balance at Dec. 31, 2019	2,347,488	$ 2,514	(7,236)	5,659,832	(3,306,834)	(788)
Beginning balance Shares at Dec. 31, 2019		251,439,000
Net income (loss)	(750,178)
Ending balance at Sep. 30, 2020	1,593,968	$ 2,562	(30,131)	5,679,197	(4,057,086)	(574)
Ending balance Shares at Sep. 30, 2020		256,232,000
Beginning balance at Dec. 31, 2019	2,347,488	$ 2,514	(7,236)	5,659,832	(3,306,834)	(788)
Beginning balance Shares at Dec. 31, 2019		251,439,000
Ending balance at Dec. 31, 2020	$ 1,637,535	$ 2,563	(30,132)	5,684,268	(4,018,685)	(479)
Ending balance Shares at Dec. 31, 2020	256,353,887	256,354,000
Beginning balance at Mar. 31, 2020	$ 2,495,808	$ 2,556	(29,750)	5,664,356	(3,140,639)	(715)
Beginning balance Shares at Mar. 31, 2020		255,685,000
Issuance of common stock	858	$ 4	0	854	0	0
Issuance of common stock, shares		376,000
Issuance of common stock upon vesting of PSUs	0	$ 0	0	74	(74)	0
Issuance of common stock upon vesting of PSUs, shares		19,000
Stock-based compensation expense	7,312	$ 0	0	7,312	0	0
Treasury stock	(444)	0	(444)	0	0	0
Other comprehensive income	71	0	0	0	0	71
Net income (loss)	(167,583)	0	0	0	(167,583)	0
Ending balance at Jun. 30, 2020	2,336,022	$ 2,560	(30,194)	5,672,596	(3,308,296)	(644)
Ending balance Shares at Jun. 30, 2020		256,080,000
Issuance of common stock	75	$ 2	0	73	0	0
Issuance of common stock, shares		152,000
Stock-based compensation expense	6,591	$ 0	0	6,591	0	0
Treasury stock	0	0	63	(63)	0	0
Other comprehensive income	70	0	0	0	0	70
Net income (loss)	(748,790)	0	0	0	(748,790)	0
Ending balance at Sep. 30, 2020	1,593,968	$ 2,562	(30,131)	5,679,197	(4,057,086)	(574)
Ending balance Shares at Sep. 30, 2020		256,232,000
Beginning balance at Dec. 31, 2020	$ 1,637,535	$ 2,563	(30,132)	5,684,268	(4,018,685)	(479)
Beginning balance Shares at Dec. 31, 2020	256,353,887	256,354,000
Issuance of common stock	$ (7,621)	$ 33	0	(7,654)	0	0
Issuance of common stock, shares		3,218,000
Issuance of common stock upon vesting of PSUs	0	$ 0	0	148	(148)	0
Stock-based compensation expense	6,713	0	0	6,713	0	0
Treasury stock	0	0	47	(47)	0	0
Other comprehensive income	70	0	0	0	0	70
Net income (loss)	27,151	0	0	0	27,151	0
Ending balance at Mar. 31, 2021	1,663,848	$ 2,596	(30,085)	5,683,428	(3,991,682)	(409)
Ending balance Shares at Mar. 31, 2021		259,572,000
Beginning balance at Dec. 31, 2020	$ 1,637,535	$ 2,563	(30,132)	5,684,268	(4,018,685)	(479)
Beginning balance Shares at Dec. 31, 2020	256,353,887	256,354,000
Net income (loss)	$ (479,588)
Ending balance at Sep. 30, 2021	$ 1,181,284	$ 2,598	(30,007)	5,707,382	(4,498,421)	(268)
Ending balance Shares at Sep. 30, 2021	259,787,004	259,787,000
Beginning balance at Mar. 31, 2021	$ 1,663,848	$ 2,596	(30,085)	5,683,428	(3,991,682)	(409)
Beginning balance Shares at Mar. 31, 2021		259,572,000
Issuance of common stock	9,291	$ 2	0	9,289	0	0
Issuance of common stock, shares		206,000
Stock-based compensation expense	6,523	$ 0	0	6,523	0	0
Treasury stock	0	0	0	0	0	0
Other comprehensive income	71	0	0	0	0	71
Net income (loss)	(156,472)	0	0	0	(156,472)	0
Ending balance at Jun. 30, 2021	1,523,261	$ 2,598	(30,085)	5,699,240	(4,148,154)	(338)
Ending balance Shares at Jun. 30, 2021		259,778,000
Issuance of common stock	754	$ 0	0	754	0	0
Issuance of common stock, shares		9,000
Stock-based compensation expense	7,466	$ 0	0	7,466	0	0
Treasury stock	0	0	78	78	0	0
Other comprehensive income	70	0	0	0	0	70
Net income (loss)	(350,267)	0	0	0	(350,267)	0
Ending balance at Sep. 30, 2021	$ 1,181,284	$ 2,598	$ (30,007)	$ 5,707,382	$ (4,498,421)	$ (268)
Ending balance Shares at Sep. 30, 2021	259,787,004	259,787,000

Summary of Organization and Nat

Summary of Organization and Nature of Business	9 Months Ended
	Sep. 30, 2021
Industry Specific Policies [Abstract]
Summary of Organization and Nature of Business	(1) SUMMARY OF ORGANIZATION AND NATURE OF BUSINESS Range Resources Corporation is a Fort Worth, Texas-based independent natural gas, natural gas liquids (NGLs) and oil company engaged in the exploration, development and acquisition of natural gas properties in the Appalachian region of the United States. Our objective is to build stockholder value through returns-focused development of natural gas properties. Range is a Delaware corporation with our common stock listed and traded on the New York Stock Exchange under the symbol “RRC.”

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	(2) BASIS OF PRESENTATION These consolidated financial statements are unaudited but, in the opinion of management, reflect all adjustments necessary for a fair statement of the results for the periods reported. All adjustments are of a normal recurring nature unless otherwise disclosed. These consolidated financial statements, including selected notes, have been prepared in accordance with the applicable rules of the Securities Exchange Commission (the SEC) and do not include all of the information and disclosures required by accounting principles generally accepted in the United States of America (U.S. GAAP) for complete financial statements. These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in our 2020 Annual Report on Form 10-K filed with the SEC on February 23, 2021. The results of operations for third quarter and nine months ended September 30, 2021 are not necessarily indicative of the results to be expected for the full year. As more fully described in Note 2 and Note 18 of our 2020 Annual Report on Form 10-K filed with the SEC, deferred tax expense (benefit) for the first, second and third quarters 2020 was corrected through a restatement.

New Accounting Standards

New Accounting Standards	9 Months Ended
	Sep. 30, 2021
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Standards	(3) NEW ACCOUNTING STANDARDS Not Yet Adopted None that are expected to have a material impact on our financial statements.

Dispositions

Dispositions	9 Months Ended
	Sep. 30, 2021
Business Combinations [Abstract]
Dispositions	(4) DISPOSITIONS We recognized a pretax net gain of $ 78,000 on the sale of assets in third quarter 2021 compared to a pretax net loss of $ 9.2 million in third quarter 2020 and a pretax net gain of $ 724,000 in first nine months 2021 compared to a pretax net gain of $ 112.4 million in first nine months 2020. See discussion below for further details. 2021 Dispositions North Louisiana . In second quarter 2021, we recorded an additional gain on the sale of our North Louisiana assets, which closed in third quarter 2020, of $ 2.4 million, which is primarily related to final closing adjustments. In first quarter 2021, we recorded an additional loss on the sale of these North Louisiana assets of $ 1.9 million. 2020 Dispositions North Louisiana. In August 2020, we completed the sale of our North Louisiana assets for total consideration having an estimated fair value of $ 260.0 million. This estimated fair value reflected (i) cash proceeds of $ 245.0 million, before normal closing adjustments and (ii) $ 15.0 million in contingent consideration which represents the estimated fair value, on August 14, 2020, of the contingent consideration we are entitled to receive in the future should certain commodity price thresholds be met. We recorded a pretax loss of $ 8.1 million, after closing adjustments, in third quarter 2020.  Divestiture contingent consideration. We are entitled to receive contingent consideration, annually through 2023, based on future achievement of certain natural gas and oil prices based on published indexes along with the realized NGLs price of the buyer. The fair value of the contingent consideration is classified as current and noncurrent derivative asset on our consolidated balance sheet. We revalue the contingent consideration each reporting period, with any valuation changes being recorded as derivative fair value income or loss in our consolidated statements of operations. See also Note 11 for additional information.  Divestiture contract obligation. As part of the sale of our North Louisiana assets, we retained certain midstream gathering, transportation and processing obligations through 2030. The divestiture contract obligation is included in current or non-current liabilities in our consolidated balance sheet based on the forecasted timing of payments. These costs are recognized in exit and termination costs in our consolidated statements of operations. See also Note 14 for additional information. Pennsylvania . In first quarter 2020, we completed the sale of our shallow legacy assets in northwestern Pennsylvania for proceeds of $ 1.0 million. Based upon the receipt of approval from state governmental authorities of a change in operatorship during first quarter, we recognized a pretax gain of $ 122.5 million primarily due to the elimination of the asset retirement obligation associated with these properties.

Revenues from Contracts with Cu

Revenues from Contracts with Customers	9 Months Ended
	Sep. 30, 2021
Revenue From Contract With Customer [Abstract]
Revenues from Contracts with Customers	(5) REVENUES FROM CONTRACTS WITH CUSTOMERS Disaggregation of Revenue We have three material revenue streams in our business: natural gas sales, NGLs sales and condensate sales (referred to below as oil sales). Brokered revenue attributable to each product sales type is included here because the volume of product that we purchase is subsequently sold to separate counterparties in accordance with existing sales contracts under which we also sell our production. Accounts receivable attributable to our revenue contracts with customers was $ 361.9 million at September 30, 2021 and $ 237.8 million at December 31, 2020. Revenue attributable to each of our identified revenue streams is disaggregated below (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Natural gas sales $ 494,917 $ 211,638 $ 1,152,283 $ 679,094 NGLs sales 309,232 149,263 795,173 416,885 Oil sales 45,156 20,652 127,051 66,928 Total natural gas, NGLs and oil sales 849,305 381,553 2,074,507 1,162,907 Sales of purchased natural gas 101,095 39,180 231,335 94,364 Sales of purchased NGLs 2,764 1,084 3,912 3,230 Other marketing revenue (1) 1,695 2,218 13,421 7,128 Total $ 954,859 $ 424,035 $ 2,323,175 $ 1,267,629 (1) The nine months ended September 30, 2021 includes $ 8.8 million received as part of a capacity release agreement.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	(6) INCOME TAXES We evaluate and update our annual effective income tax rate on a quarterly basis based on current and forecasted operating results and tax laws. Consequently, based upon the mix and timing of our actual earnings compared to annual projections, our effective tax rate may vary quarterly and may make comparisons not meaningful. The effective income tax rate is influenced by a variety of factors including geographic sources and relative magnitude of these sources of income. Income taxes for discrete items are computed and recorded in the period that a specific transaction occurs. For the three months and nine months ended September 30, 2021 and 2020, our overall effective tax rate was different than the federal statutory rate due primarily to state income taxes, equity compensation, valuation allowances and other tax items. Current income taxes reflect estimated state income taxes due for 2021 which is based on our estimated earnings, taking into account state tax rates and laws regarding NOL limitations.

Income (Loss) Per Common Share

Income (Loss) Per Common Share	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Income (Loss) Per Common Share	(7) INCOME (LOSS) PER COMMON SHARE Basic income or loss per share attributable to common shareholders is computed as (1) income or loss attributable to common shareholders (2) less income allocable to participating securities (3) divided by weighted average basic shares outstanding. Diluted income or loss per share attributable to common shareholders is computed as (1) basic income or loss attributable to common shareholders (2) plus diluted adjustments to income allocable to participating securities (3) divided by weighted average diluted shares outstanding. The following sets forth a reconciliation of income or loss attributable to common shareholders to basic income or loss attributable to common shareholders to diluted income or loss attributable to common shareholders (in thousands, except per share amounts): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Net loss, as reported $ ( 350,267 ) $ ( 748,790 ) $ ( 479,588 ) $ ( 750,178 ) Participating earnings (a) — — — — Basic net loss attributed to common shareholders ( 350,267 ) ( 748,790 ) ( 479,588 ) ( 750,178 ) Reallocation of participating earnings (a) — — — — Diluted net loss attributed to common $ ( 350,267 ) $ ( 748,790 ) $ ( 479,588 ) $ ( 750,178 ) Net loss per common share: Basic $ ( 1.44 ) $ ( 3.12 ) $ ( 1.98 ) $ ( 3.10 ) Diluted $ ( 1.44 ) $ ( 3.12 ) $ ( 1.98 ) $ ( 3.10 ) (a) Restricted Stock Awards represent participating securities because they participate in nonforfeitable dividends or distributions with common equity owners. Income allocable to participating securities represents the distributed and undistributed earnings attributable to the participating securities. Participating securities, however, do not participate in undistributed net losses. The following details weighted average common shares outstanding and diluted weighted average common shares outstanding (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Weighted average common shares outstanding – basic and diluted 243,311 239,895 242,692 241,770 Weighted average common shares outstanding-basic for third quarter 2021 excludes 6.5 million shares of restricted stock held in our deferred compensation plan compared to 6.2 million shares in third quarter 2020 (although all awards are issued and outstanding upon grant). Weighted average common shares outstanding-basic for first nine months 2021 excludes 6.6 million shares of restricted stock compared to 5.3 million for first nine months 2020. Due to our net loss for third quarter and first nine months 2021 and 2020, we excluded all equity-grants from the computation of diluted loss per share because the effect would have been anti-dilutive to the computations.

Capitalized Costs and Accumulat

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	9 Months Ended
	Sep. 30, 2021
Extractive Industries [Abstract]
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	(8) Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (a) September 30, December 31, (in thousands) Natural gas properties: Properties subject to depletion $ 9,203,586 $ 8,891,348 Unproved properties 864,659 859,766 Total 10,068,245 9,751,114 Accumulated depletion and depreciation ( 4,330,289 ) ( 4,064,305 ) Net capitalized costs $ 5,737,956 $ 5,686,809 (a) Includes capitalized asset retirement costs and the associated accumulated amortization.

Indebtedness

Indebtedness	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Indebtedness	(9) INDEBTEDNESS We had the following debt outstanding as of the dates shown below (bank debt interest rate at September 30, 2021 is shown parenthetically). No interest was capitalized during the nine months ended September 30, 2021 or the year ended December 31, 2020 (in thousands). September 30, December 31, Bank debt ( 2.4 %) $ 30,000 $ 702,000 Senior notes: 4.875 % senior notes due 2025 750,000 750,000 5.00 % senior notes due 2022 169,589 169,589 5.00 % senior notes due 2023 532,335 532,335 5.75 % senior notes due 2021 — 25,496 5.875 % senior notes due 2022 48,528 48,528 8.25 % senior notes due 2029 600,000 — 9.25 % senior notes due 2026 850,000 850,000 Other senior notes due 2022 — 490 Total senior notes 2,950,452 2,376,438 Senior subordinated notes: 5.00 % senior subordinated notes due 2022 — 9,730 5.00 % senior subordinated notes due 2023 — 7,712 5.75 % senior subordinated notes due 2021 — 19,896 Total senior subordinated notes — 37,338 Total debt 2,980,452 3,115,776 Unamortized premium 254 457 Unamortized debt issuance costs ( 32,326 ) ( 30,625 ) Total debt net of debt issuance costs 2,948,380 3,085,608 Less current maturities of long-term debt ( 217,909 ) ( 45,356 ) Total long-term debt $ 2,730,471 $ 3,040,252 Bank Debt In April 2018, we entered into an amended and restated revolving bank facility, which we refer to as our bank debt or our bank credit facility, which is secured by substantially all of our assets and has a maturity date of April 13, 2023 . The bank credit facility provides for a maximum facility amount of $ 4.0 billion and an initial borrowing base of $ 3.0 billion. The bank credit facility also provides for a borrowing base subject to periodic redeterminations and for event-driven unscheduled redeterminations. As of September 30, 2021, our bank group was composed of twenty-five financial institutions. The borrowing base may be increased or decreased based on our request and sufficient proved reserves, as determined by the bank group. The commitment amount may be increased to the borrowing base, subject to payment of a mutually acceptable commitment fee to those banks agreeing to participate in the facility increase. Borrowings under the bank credit facility can either be at the alternate base rate (ABR, as defined in the bank credit facility agreement) plus a spread ranging from 0.25 % to 1.25 % or LIBOR borrowings at the LIBOR Rate (as defined in the bank credit facility agreement) plus a spread ranging from 1.25 % to 2.25 %. The applicable spread is dependent upon borrowings relative to the borrowing base. We may elect, from time to time, to convert all or any part of our LIBOR loans to base rate loans or to convert all or any of the base rate loans to LIBOR loans. The weighted average interest rate was 2.0 % for third quarter 2021 compared to 2.4 % for third quarter 2020. The weighted average interest rate was 2.1 % for first nine months 2021 compared to 2.7 % for first nine months 2020. A commitment fee is paid on the undrawn balance based on an annual rate of 0.30 % to 0.375 %. At September 30, 2021, the commitment fee was 0.30 % and the interest rate margin was 1.75 % on our LIBOR loans and 0.75 % on our ABR loans. As part of our redetermination completed in September 2021, our borrowing base was reaffirmed for $ 3.0 billion and our bank commitment was also reaffirmed at $ 2.4 billion. On September 30, 2021, bank commitments totaled $ 2.4 billion and the outstanding balance under our bank credit facility was $ 30.0 million, before deducting debt issuance costs. Additionally, we had $ 334.6 million of undrawn letters of credit, leaving $ 2.0 billion of committed borrowing capacity available under the facility. New Senior Notes In January 2021, we issued $ 600.0 million aggregate principal amount of 8.25 % senior notes due 2029 (the 8.25% Notes) for net proceeds of $ 590.8 million after underwriting expenses and commissions of $ 9.2 million. The notes were issued at par. The 8.25% Notes were offered to qualified institutional buyers and to non-U.S. persons outside the United States in compliance with Rule 144A and Regulation S of the Securities Act of 1933, as amended (the Securities Act). Interest due on the 8.25% Notes is payable semi-annually in January and July and is unconditionally guaranteed on a senior unsecured basis by all of our subsidiary guarantors. On or after January 15, 2027, we may redeem the 8.25% Notes, in whole or in part and from time to time, at 100 % of the principal amounts plus accrued and unpaid interest. We may redeem the notes prior to their maturity at redemption prices based on a premium, plus accrued and unpaid interest as described in the indenture governing the 8.25% Notes. Upon occurrence of certain changes in control, we must offer to repurchase the 8.25% Notes. The 8.25% Notes are unsecured and are subordinated to all of our existing and future secured debt, rank equally with all of our existing and future unsecured debt and rank senior to all of our existing and future subordinated debt. On the closing of the issuance of the 8.25% Notes, we used the proceeds to repay borrowings under our bank credit facility. Early Redemption In first quarter 2021, based on the terms of the indentures governing certain of our senior and senior subordinated notes, we notified the trustee that we were electing to redeem the outstanding principal amounts of the following notes (in thousands): Outstanding 5.75% senior notes due 2021 $ 25,496 5.875% senior notes due 2022 $ 490 5.75% senior subordinated notes 2021 $ 19,896 5.00% senior subordinated notes 2022 $ 9,730 5.00% senior subordinated notes 2023 $ 7,712 The redemption price equaled 100 % of the unpaid principal plus accrued and unpaid interest. The redemption date was April 2, 2021. We recognized a loss on early extinguishment of debt in second quarter 2021 of approximately $ 63,000 which represents expensing of the remaining deferred financing costs. Senior Notes If we experience a change of control, noteholders may require us to repurchase all or a portion of our senior notes at 101 % of the aggregate principal amount plus accrued and unpaid interest, if any. Guarantees Range is a holding company which owns no operating assets and has no significant operations independent of its subsidiaries. The guarantees by our subsidiaries, which are directly or indirectly owned by Range, of our senior notes and our bank credit facility are full and unconditional and joint and several, subject to certain customary release provisions. The assets, liabilities and results of operations of Range and our guarantor subsidiaries are not materially different than our consolidated financial statements. A subsidiary guarantor may be released from its obligations under the guarantee:  in the event of a sale or other disposition of all or substantially all of the assets of the subsidiary guarantor or a sale or other disposition of all the capital stock of the subsidiary guarantor, to any corporation or other person (including an unrestricted subsidiary of Range) by way of merger, consolidation, or otherwise; or  if Range designates any restricted subsidiary that is a guarantor to be an unrestricted subsidiary in accordance with the terms of the indenture. Debt Covenants Our bank credit facility contains negative covenants that limit our ability, among other things, to pay cash dividends, incur additional indebtedness, sell assets, enter into certain hedging contracts, change the nature of our business or operations, merge, consolidate or make certain investments. In addition, we are required to maintain a ratio of EBITDAX (as defined in the bank credit facility agreement) to cash interest expense of equal to or greater than 2.5 and a current ratio (as defined in the bank credit facility agreement) of no less than 1.0 . In addition, the ratio of the present value of proved reserves (as defined in the bank credit facility agreement) to total debt must be equal to or greater than 1.5 until Range has two investment grade ratings. We were in compliance with applicable covenants under the bank credit facility at September 30, 2021.

Asset Retirement Obligations

Asset Retirement Obligations	9 Months Ended
	Sep. 30, 2021
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	(10) ASSET RETIREMENT OBLIGATIONS Our asset retirement obligations primarily represent the estimated present value of the amounts we will incur to plug, abandon and remediate our producing properties at the end of their productive lives. Significant inputs used in determining such obligations include estimates of plugging and abandonment costs, estimated future inflation rates and well lives. The inputs are calculated based on historical data as well as current estimated costs. A reconciliation of our liability for plugging and abandonment costs for the nine months ended September 30, 2021 and the year ended December 31, 2020 is as follows (in thousands): Nine Months Year Beginning of period $ 79,822 $ 251,076 Liabilities incurred 88 1,483 Acquisitions — 123 Liabilities settled ( 5,719 ) ( 4,634 ) Disposition of wells — ( 176,748 ) Accretion expense 4,257 7,518 Change in estimate 2,856 1,004 End of period 81,304 79,822 Less current portion ( 6,689 ) ( 6,689 ) Long-term asset retirement obligations $ 74,615 $ 73,133 Accretion expense is recognized as a component of depreciation, depletion and amortization expense in the accompanying consolidated statements of operations.

Derivative Activities

Derivative Activities	9 Months Ended
	Sep. 30, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Activities	(11) DERIVATIVE ACTIVITIES We use commodity-based derivative contracts to manage exposure to commodity price fluctuations. We do not enter into these arrangements for speculative or trading purposes. We utilize commodity swaps, calls, collars, three-way collars or swaptions to (1) reduce the effect of price volatility of the commodities we produce and sell and (2) support our annual capital budget and expenditure plans. The fair value of our derivative contracts, represented by the estimated amount that would be realized upon termination, based on a comparison of the contract price and a reference price, generally the New York Mercantile Exchange (NYMEX) for natural gas and crude oil or Mont Belvieu for NGLs, approximated a net loss of $ 776.1 million at September 30, 2021. These contracts expire monthly through December 2023. The following table sets forth our commodity-based derivative volumes by year as of September 30, 2021, excluding our basis and freight swaps and divestiture contingent consideration which are discussed separately below: Period Contract Type Volume Hedged Weighted Average Hedge Price Swap Sold Put Floor Ceiling Natural Gas (1) 2021 Swaps 583,152 Mmbtu/day $ 2.84 2021 Collars 227,391 Mmbtu/day $ 2.87 $ 3.42 2021 Three-way Collars 339,457 Mmbtu/day $ 2.26 $ 2.62 $ 3.04 2022 Swaps 382,329 Mmbtu/day $ 3.11 2022 Collars 213,438 Mmbtu/day $ 3.26 $ 3.70 2022 Three-way Collars 251,781 Mmbtu/day $ 2.37 $ 3.03 $ 3.77 January - March 2022 Calls 80,000 Mmbtu/day $ 6.02 2023 Swaps 60,000 Mmbtu/day $ 3.27 Crude Oil 2021 Swaps 7,500 bbls/day $ 56.92 2022 Swaps 5,811 bbls/day $ 59.59 2023 Swaps 500 bbls/day $ 63.50 NGLs (C3-Propane) 2021 Swaps 6,000 bbls/day $ 1.17 /gallon 2021 Collars 4,000 bbls/day $ 1.00 /gallon $ $ 1.20 /gallon NGLs (NC4-Normal Butane) 2021 Swaps 2,663 bbls/day $ 1.17 /gallon 2021 Collars 2,000 bbls/day $ 1.00 /gallon $ 1.20 /gallon NGLs (C5-Natural Gasoline) 2021 Swaps 2,000 bbls/day $ 1.41 /gallon 2021 Collars 3,000 bbls/day $ 1.35 /gallon $ 1.55 /gallon January - March 2022 Swaps 2,656 bbls/day $ 1.59 /gallon January - March 2022 Collars 2,000 bbls/day $ 1.45 /gallon $ 1.60 /gallon (1) We also sold natural gas call swaptions of 80,000 Mmbtu/day for 2022 at a weighted average price of $ 2.80 and 70,000 Mmbtu/day for 2023 at a weighted average price of $3.04 . Every derivative instrument is required to be recorded on the balance sheet as either an asset or a liability measured at its fair value. We recognize all changes in fair value of these derivatives as earnings in derivative fair value income or loss in the periods in which they occur. Basis Swap Contracts In addition to the swaps, collars and swaptions described above, at September 30, 2021, we had natural gas basis swap contracts which lock in the differential between NYMEX Henry Hub and certain of our physical pricing indices. These contracts settle monthly through December 2024 and include a total volume of 204,967,500 Mmbtu. The fair value of these contracts was a gain of $ 8.5 million at September 30, 2021. At September 30, 2021, we also had propane spread swap contracts which lock in the differential between Mont Belvieu and international propane indices. The contracts settle monthly through 2022. The fair value of these contracts was a gain of $ 394,000 at September 30, 2021. Freight Swap Contracts In connection with our international propane sales, we utilize propane swaps. To further hedge our propane price, at September 30, 2021, we had freight swap contracts on the Baltic Exchange which lock in the freight rate for a specific trade route. These contracts settle monthly and cover 12,000 metric tons for the remainder of 2021 and cover 7,000 metric tons for first quarter 2022. The fair value of these contracts equal to a loss of $ 26,000 at September 30, 2021. Divestiture Contingent Consideration In addition to the derivatives described above, our right to receive contingent consideration in conjunction with the sale of our North Louisiana assets was determined to be a derivative financial instrument that is not designated as a hedging instrument. The remaining contingent consideration of up to $ 75.0 million is based on future achievement of natural gas and oil prices based on published indexes and realized NGLs prices of the buyer for the years 2021, 2022 and 2023. All changes in the fair value are recognized as a gain or loss in earnings in the period they occur in derivative fair value income or loss in our consolidated statements of operations. For first nine months 2021, this fair value has increased $ 34.3 million for a fair value of $ 50.2 million as of September 30, 2021. Derivative Assets and Liabilities The combined fair value of derivatives included in the accompanying consolidated balance sheets as of September 30, 2021 and December 31, 2020 is summarized below. The assets and liabilities are netted where derivatives with both gain and loss positions are held by a single counterparty and we have master netting arrangements. The tables below provide additional information relating to our master netting arrangements with our derivative counterparties (in thousands): September 30, 2021 Gross Gross Net Amounts Derivative assets: Natural gas –swaps $ 5,574 $ ( 5,574 ) $ — –collars 193 ( 193 ) — –three-way collars 2 ( 2 ) — –basis swaps 15,633 ( 12,187 ) 3,446 Crude oil –swaps 10 ( 10 ) — NGLs –C3 propane spread swaps 8,367 ( 8,367 ) — −C5 natural gasoline swaps 17 ( 17 ) — Freight −swaps 27 ( 30 ) ( 3 ) Divestiture contingent consideration 50,220 — 50,220 $ 80,043 $ ( 26,380 ) $ 53,663 September 30, 2021 Gross Gross Net Amounts Derivative (liabilities): Natural gas –swaps $ ( 359,243 ) $ 5,574 $ ( 353,669 ) –swaptions ( 60,132 ) — ( 60,132 ) –collars ( 93,418 ) 193 ( 93,225 ) –three-way collars ( 200,479 ) 2 ( 200,477 ) –calls ( 10,018 ) — ( 10,018 ) –basis swaps ( 7,160 ) 12,187 5,027 Crude oil –swaps ( 34,274 ) 10 ( 34,264 ) NGLs –C3 propane spread swaps ( 7,973 ) 8,367 394 –C3 propane swaps ( 6,140 ) — ( 6,140 ) –C3 collars ( 3,787 ) — ( 3,787 ) –NC4 butane swaps ( 3,991 ) — ( 3,991 ) –NC4 butane collars ( 2,797 ) — ( 2,797 ) –C5 natural gasoline swaps ( 3,908 ) 17 ( 3,891 ) –C5 natural gasoline collars ( 3,728 ) — ( 3,728 ) Freight –swaps ( 53 ) 30 ( 23 ) $ ( 797,101 ) $ 26,380 $ ( 770,721 ) December 31, 2020 Gross Gross Amounts Net Amounts of Derivative assets: Natural gas –swaps $ 33,559 $ ( 16,821 ) $ 16,738 –collars 7,016 ( 2,329 ) 4,687 –three-way collars 535 ( 6,139 ) ( 5,604 ) –basis swaps 7,894 ( 3,502 ) 4,392 Crude oil –swaps 2,465 ( 829 ) 1,636 NGLs –C3 propane spread swaps 4,863 ( 4,863 ) — –C3 propane collars — ( 107 ) ( 107 ) Freight –swaps 2,310 — 2,310 Divestiture contingent consideration 15,960 — 15,960 $ 74,602 $ ( 34,590 ) $ 40,012 December 31, 2020 Gross Gross Amounts Net Amounts of Derivative (liabilities): Natural gas –swaps $ ( 10,120 ) $ 16,821 $ 6,701 –swaptions ( 9,803 ) — ( 9,803 ) –collars — 2,329 2,329 –three-way collars ( 18,353 ) 6,139 ( 12,214 ) –basis swaps ( 4,197 ) 3,502 ( 695 ) Crude oil –swaps ( 5,471 ) 829 ( 4,642 ) NGLs –C3 propane spread swaps ( 4,069 ) 4,863 794 –C3 propane swaps ( 8,243 ) — ( 8,243 ) –C3 propane collars ( 3,086 ) 107 ( 2,979 ) –C5 natural gasoline swaps ( 4,897 ) — ( 4,897 ) –C5 natural gasoline calls ( 546 ) — ( 546 ) –NC4 butane swaps ( 651 ) — ( 651 ) –NC4 butane collars ( 401 ) — ( 401 ) Freight –swaps ( 1,206 ) — ( 1,206 ) $ ( 71,043 ) $ 34,590 $ ( 36,453 ) The effects of our derivatives on our consolidated statements of operations are summarized below (in thousands): Derivative Fair Value (Loss) Income Three Months Ended Nine Months Ended 2021 2020 2021 2020 Commodity swaps $ ( 332,855 ) $ ( 91,425 ) $ ( 558,186 ) $ 142,413 Swaptions ( 33,718 ) ( 14,166 ) ( 50,329 ) ( 15,520 ) Three-way collars ( 173,344 ) ( 20,705 ) ( 226,176 ) ( 38,267 ) Collars ( 106,340 ) ( 16,893 ) ( 158,562 ) ( 14,336 ) Calls ( 10,018 ) ( 255 ) ( 10,793 ) ( 12 ) Basis swaps ( 8,469 ) 15,587 11,054 31,750 Freight swaps ( 346 ) 2,737 ( 1,050 ) ( 4,276 ) Divestiture contingent consideration 12,870 430 34,260 430 Total $ ( 652,220 ) $ ( 124,690 ) $ ( 959,782 ) $ 102,182

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Measurements	(12) FAIR VALUE MEASUREMENTS Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There are three approaches for measuring the fair value of assets and liabilities: the market approach, the income approach and the cost approach, each of which includes multiple valuation techniques. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to measure fair value by converting future amounts, such as cash flows or earnings, into a single present value amount using current market expectations about those future amounts. The cost approach is based on the amount that would currently be required to replace the service capacity of an asset. This is often referred to as current replacement cost. The cost approach assumes that the fair value would not exceed what it would cost a market participant to acquire or construct a substitute asset of comparable utility, adjusted for obsolescence. The fair value accounting standards do not prescribe which valuation technique should be used when measuring fair value and does not prioritize among the techniques. These standards establish a fair value hierarchy that prioritizes the inputs used in applying the various valuation techniques. Inputs broadly refer to the assumptions that market participants use to make pricing decisions, including assumptions about risk. Level 1 inputs are given the highest priority in the fair value hierarchy while Level 3 inputs are given the lowest priority. The three levels of the fair value hierarchy are as follows:  Level 1 – Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets 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 – Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date.  Level 3 – Unobservable inputs for which there is little, if any, market activity for the asset or liability being measured. These inputs reflect management’s best estimates of the assumptions market participants would use in determining fair value. Our Level 3 measurements consist of instruments using standard pricing models and other valuation methods that utilize unobservable pricing inputs that are significant to the overall fair value. Valuation techniques that maximize the use of observable inputs are favored. Assets and liabilities are classified in their entirety based on the lowest priority level of input that is significant to the fair value measurement. The assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the placement of assets and liabilities within the levels of the fair value hierarchy. Significant uses of fair value measurements include:  impairment assessments of long-lived assets; and  recorded value of derivative instruments and trading securities. The need to test long-lived assets can be based on several indicators, including a significant reduction in prices of natural gas, oil and condensate, NGLs, unfavorable adjustments to reserves, significant changes in the expected timing of production, other changes to contracts or changes in the regulatory environment in which a property is located. Fair Values – Recurring We use a market approach for our recurring fair value measurements and endeavor to use the best information available. The following tables present the fair value hierarchy for assets and liabilities measured at fair value, on a recurring basis (in thousands): Fair Value Measurements at September 30, 2021 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation $ 66,833 $ — $ — $ 66,833 Commodity price derivatives –swaps — ( 401,955 ) — ( 401,955 ) –collars — ( 93,225 ) ( 10,312 ) ( 103,537 ) –three-way collars — ( 200,477 ) — ( 200,477 ) –calls — ( 10,018 ) ( 10,018 ) –basis swaps — 8,867 — 8,867 –swaptions — — ( 60,132 ) ( 60,132 ) Derivatives–freight swaps — ( 26 ) — ( 26 ) Divestiture contingent consideration — 50,220 — 50,220 Fair Value Measurements at December 31, 2020 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation $ 63,942 $ — $ — $ 63,942 Commodity price derivatives –swaps — 6,642 — 6,642 –calls — — ( 546 ) ( 546 ) –collars — 7,016 ( 3,487 ) 3,529 –three-way collars — ( 17,818 ) — ( 17,818 ) –basis swaps — 4,491 — 4,491 –swaptions — — ( 9,803 ) ( 9,803 ) Derivatives–freight swaps — 1,104 — 1,104 Divesture contingent consideration — 15,960 — 15,960 Our trading securities in Level 1 are exchange-traded and measured at fair value with a market approach using end of period market values. Derivatives in Level 2 are measured at fair value with a market approach using third-party pricing services which have been corroborated with data from active markets or broker quotes. As of September 30, 2021, a portion of our natural gas and oil derivative instruments contain swaptions where the counterparty has the right, but not the obligation, to enter into a fixed price swap on a pre-determined date. If exercised, the swaption contract becomes a swap treated consistently with our fixed-price swaps. In addition to our swaptions in Level 3 at September 30, 2021, we have NGLs collars. Derivatives in Level 3 are also measured at fair value with a market approach using third-party pricing services which have been corroborated with data from active markets or broker quotes. However, the subjectivity in the volatility factors utilized can cause a significant change in the fair value measurement of our derivatives in Level 3 and is considered a significant unobservable input. At September 30, 2021, for our swaptions, we used a weighted average implied volatility of 40 % for natural gas. We also utilized a range of implied volatilities from 36 % to 55 % for our NGLs collars with a weighted average implied volatility of 42 %. The following is a reconciliation of the beginning and ending balances for derivative instruments classified as Level 3 in the fair value hierarchy (in thousands): As of Balance at December 31, 2020 $ ( 13,836 ) Total losses: Included in earnings ( 42,974 ) Additions ( 23,385 ) Settlements 5,177 Transfers out of Level 3 4,574 Balance at September 30, 2021 $ ( 70,444 ) Divestiture Contingent Consideration. In August 2020, we completed the sale of our North Louisiana assets where we are entitled to receive contingent consideration based on future achievement of natural gas and oil prices based on published indexes along with NGLs prices based on the realized NGLs prices of the buyer. We used an option pricing model to estimate the fair value of the contingent consideration using significant Level 2 inputs that include quoted future commodity prices based on active markets. Trading securities. Our trading securities held in the deferred compensation plan are accounted for using the mark-to- market accounting method and are included in other assets in the accompanying consolidated balance sheets. We elected to adopt the fair value option to simplify our accounting for the investments in our deferred compensation plan. Interest, dividends, and mark-to-market gains or losses are included in deferred compensation plan expense in the accompanying consolidated statements of operations. For third quarter 2021, interest and dividends were $ 314,000 and the mark-to-market adjustment was a loss of $ 1.2 million compared to interest and dividends of $ 114,000 and a mark-to-market gain of $ 3.2 million in third quarter 2020. For first nine months 2021, interest and dividends were $ 541,000 and the mark-to-market adjustment was a gain of $ 3.1 million compared to interest and dividends of $ 385,000 and a mark-to-market adjustment of a gain of $ 234,000 in first nine months 2020. Fair Values – Non-recurring Certain assets are measured at fair value on a non-recurring basis. These assets are not measured at fair value on an ongoing basis but are subject to fair value adjustments in certain circumstances. Our proved natural gas and oil properties are reviewed for impairment periodically as events or changes in circumstances indicate the carrying amount may not be recoverable. In first quarter 2020, we recognized impairment charges of $ 77.0 million that reduced the carrying value to the anticipated sales proceeds for our North Louisiana assets which is a market approach using Level 2 inputs. These assets were sold in third quarter 2020. In conjunction with the sale of our North Louisiana assets in third quarter 2020, we recorded impairment expense associated with our headquarters office lease of $ 2.0 million. There were no proved property impairment charges in third quarter or first nine months 2021. Fair Values – Reported The following presents the carrying amounts and the fair values of our financial instruments as of September 30, 2021 and December 31, 2020 (in thousands): September 30, 2021 December 31, 2020 Carrying Fair Carrying Fair Assets: Commodity swaps, collars and basis swaps $ 3,443 $ 3,443 $ 24,052 $ 24,052 Divestiture contingent consideration 50,220 50,220 15,960 15,960 Marketable securities (a) 66,833 66,833 63,942 63,942 (Liabilities): Commodity swaps, collars and basis swaps ( 770,721 ) ( 770,721 ) ( 36,453 ) ( 36,453 ) Bank credit facility (b) ( 30,000 ) ( 30,000 ) ( 702,000 ) ( 702,000 ) 5.75 % senior notes due 2021 (b) — — ( 25,496 ) ( 25,474 ) 5.00 % senior notes due 2022 (b) ( 169,589 ) ( 172,667 ) ( 169,589 ) ( 170,128 ) 5.875 % senior notes due 2022 (b) ( 48,528 ) ( 49,383 ) ( 48,528 ) ( 48,471 ) Other senior notes due 2022 (b) — — ( 490 ) ( 490 ) 5.00 % senior notes due 2023 (b) ( 532,335 ) ( 552,463 ) ( 532,335 ) ( 521,699 ) 4.875 % senior notes due 2025 (b) ( 750,000 ) ( 791,715 ) ( 750,000 ) ( 707,918 ) 9.25 % senior notes due 2026 (b) ( 850,000 ) ( 926,832 ) ( 850,000 ) ( 888,208 ) 8.25 % senior notes due 2029 (b) ( 600,000 ) ( 674,994 ) — — 5.75 % senior subordinated notes due 2021 (b) — — ( 19,896 ) ( 19,589 ) 5.00 % senior subordinated notes due 2022 (b) — — ( 9,730 ) ( 9,247 ) 5.00 % senior subordinated notes due 2023 (b) — — ( 7,712 ) ( 6,604 ) Deferred compensation plan (c) ( 184,882 ) ( 184,882 ) ( 96,563 ) ( 96,563 ) (a) Marketable securities, which are held in our deferred compensation plans, are actively traded on major exchanges. (b) The book value of our bank debt approximates fair value because of its floating rate structure. The fair value of our senior notes and our senior subordinated notes is based on end of period market quotes which are Level 2 inputs. (c) The fair value of our deferred compensation plan is updated to the closing price on the balance sheet date which is a Level 1 input. Our current assets and liabilities include financial instruments, the most significant of which are trade accounts receivable and payable. We believe the carrying values of our current assets and liabilities approximate fair value. Our fair value assessment incorporates a variety of considerations, including (1) the short-term duration of the instruments and (2) our historical and expected incurrence of bad debt expense. Non-financial liabilities initially measured at fair value include asset retirement obligations, operating lease liabilities and the divestiture contract obligation that we incurred in conjunction with the sale of our North Louisiana assets. Concentrations of Credit Risk As of September 30, 2021, our primary concentrations of credit risk are the risks of not collecting accounts receivable and the risk of a counterparty’s failure to perform under derivative obligations. Most of our receivables are from a diverse group of companies, including major energy companies, pipeline companies, local distribution companies, financial institutions and end-users in various industries. Letters of credit or other appropriate assurances are obtained as deemed necessary to limit our risk of loss. Our allowance for uncollectable receivables was $ 373,000 at September 30, 2021 compared to $ 3.0 million at December 31, 2020. Our derivative exposure to credit risk is diversified primarily among major investment grade financial institutions, where we have master netting agreements which provide for offsetting payables against receivables from separate derivative contracts. To manage counterparty risk associated with our derivatives, we select and monitor our counterparties based on our assessment of their financial strength and/or credit ratings. We may also limit the level of exposure with any single counterparty. At September 30, 2021, our derivative counterparties include nineteen financial institutions, of which all but five are secured lenders in our bank credit facility. At September 30, 2021, our net derivative liability includes a net receivable of $ 2.4 million from four of these counterparties that are not participants in our bank credit facility and an aggregate net payable of $ 9.2 million to one of these counterparties. Allowance for Expected Credit Losses. Each reporting period, we assess the recoverability of material receivables using historical data, current market conditions and reasonable and supported forecasts of future economic conditions to determine their expected collectability. The loss given default method is used when, based on management’s judgment, an allowance for expected credit losses should be accrued on a material receivable to reflect the net amount to be collected.

Stock-based Compensation Plans

Stock-based Compensation Plans	9 Months Ended
	Sep. 30, 2021
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation Plans	(13) STOCK-BASED COMPENSATION PLANS Stock-Based Awards We have two active equity-based stock plans: our Amended and Restated 2005 Equity-Based Incentive Compensation Plan and our Amended and Restated 2019 Equity-Based Compensation Plan. Under these plans, various awards may be issued to non-employee directors and employees pursuant to decisions of the Compensation Committee, which is composed of only non-employee, independent directors. Total Stock-Based Compensation Expense Stock-based compensation represents amortization of restricted stock and performance units. Unlike the other forms of stock-based compensation, the mark-to-market adjustment of the liability related to the vested restricted stock held in our deferred compensation plan is directly tied to the change in our stock price and not directly related to the functional expenses and therefore, is not allocated to the functional categories. The following details the allocation of stock-based compensation to functional expense categories (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Direct operating expense $ 319 $ ( 74 ) $ 986 $ 810 Brokered natural gas and marketing expense 446 324 1,339 905 Exploration expense 368 189 1,116 891 General and administrative expense 9,845 6,863 28,632 24,071 Termination costs — 2,020 — 2,020 Total stock-based compensation expense $ 10,978 $ 9,322 $ 32,073 $ 28,697 Stock-Based Awards Restricted Stock Awards . We grant restricted stock units under our equity-based stock compensation plans. These restricted stock units, which we refer to as restricted stock Equity Awards, generally vest over a three-year period, contingent on the recipient’s continued employment. The grant date fair value of the Equity Awards is based on the fair market value of our common stock on the date of grant. The Compensation Committee also grants restricted stock to certain employees and non-employee directors of the Board of Directors as part of their compensation. We also grant restricted stock to certain employees for retention purposes. Compensation expense is recognized over the balance of the vesting period, which is typically three years for employee grants and one year vesting for non-employee directors. All restricted stock awards are issued at prevailing market prices at the time of the grant and the vesting is based upon an employee’s continued employment with us. Prior to vesting, all restricted stock award recipients have the right to vote such stock and receive dividends thereon. Upon grant of these restricted shares, which we refer to as restricted stock Liability Awards, the majority of these shares are generally placed in our deferred compensation plan and, upon vesting, withdrawals are allowed in either cash or in stock. In early 2021, vesting for new grants of restricted stock Liability Awards changed to a three-year cliff vesting from a ratable 30%-30%-40% vesting schedule. These Liability Awards are classified as a liability and are remeasured at fair value each reporting period. This mark-to-market amount is reported in deferred compensation plan expense in the accompanying consolidated statements of operations. Historically, we have used authorized but unissued shares of stock when restricted stock is granted. However, we can also utilize treasury shares when available. Stock-Based Performance Units . We grant three types of performance share awards: two based on internal performance conditions which were initially measured against internal debt-adjusted performance metrics (Production Per Share Awards or PS-PSUs and Reserves Per Share Awards or RS-PSUs) and one based on market conditions measured based on Range’s performance relative to a predetermined peer group (TSR Awards or TSR-PSUs). In first quarter 2021, our internal performance metrics were changed to focus on debt reduction and to include an environmental component. For shares granted in first quarter 2021, the performance conditions will be measured against internal metrics of Debt/EBITDAX (earnings before interest, taxes, depreciation, amortization and exploration expense) and emission intensity performance. These shares will vest at the end of three years and the three-year performance target was set in first quarter 2021. Each unit granted represents one share of our common stock. These units are settled in stock and the amount of the payout is based on (1) the vesting percentage, which can range from zero to 200 % based on performance achieved, which is determined by the Compensation Committee and (2) the value of our common stock on the vesting date. Dividend equivalents may accrue during the performance period and are paid in stock at the end of the performance period. The performance period for the TSR-PSUs is three years . Prior to 2021, the performance period for the PS/RS-PSUs was based on annual performance targets earned over a three-year period. Restricted Stock – Equity Awards In first nine months 2021, we granted 2.3 million restricted stock Equity Awards to employees at an average grant date fair value of $ 10.20 which generally vest over a three-year period compared to 4.5 million at an average grant date fair value of $ 3.42 in first nine months 2020. We recorded compensation expense for these outstanding awards of $ 15.0 million in first nine months 2021 compared to $ 13.4 million in the same period of 2020. Restricted stock Equity Awards are not issued to employees until such time as they are vested. Employees do not have the option to receive cash. Restricted Stock – Liability Awards In first nine months 2021, we granted 1.2 million shares of restricted stock Liability Awards as compensation to employees at an average grant date fair value of $ 9.30 which generally vest at the end of a three-year period and 102,000 shares were granted to non-employee directors at an average price of $ 12.49 with vesting at the end of a one-year period. In first nine months 2020, we granted 3.3 million shares of restricted stock Liability Awards as compensation to employees at an average grant date fair value of $ 3.03 with vesting generally over a three-year period and 217,000 were granted to non-employee directors at an average price of $ 5.38 with vesting at the end of a one-year period. We recorded compensation expense for these Liability Awards of $ 8.4 million in first nine months 2021 compared to $ 7.9 million in first nine months 2020. The majority of these awards are held in our deferred compensation plan, are classified as a liability and are remeasured at fair value each reporting period. This mark-to-market amount is reported as deferred compensation expense in our consolidated statements of operations (see additional discussion below). The following is a summary of the status of our non-vested restricted stock outstanding at September 30, 2021: Restricted Stock Restricted Stock Shares Weighted Shares Weighted Outstanding at December 31, 2020 2,815,860 $ 4.97 1,186,636 $ 4.18 Granted 2,340,114 10.20 1,288,729 9.55 Vested ( 1,820,011 ) 7.37 ( 1,316,542 ) 6.98 Forfeited ( 79,732 ) 6.30 — — Outstanding at September 30, 2021 3,256,231 $ 7.36 1,158,823 $ 6.98 Stock-Based Performance Units Internal Performance Metric Awards. These awards vest at the end of the three-year performance period. The performance metrics are set by the Compensation Committee. If the performance metric for the applicable period is not met, that portion is considered forfeited and there is an adjustment to the expense recorded. See additional information above for shares granted in first quarter 2021. The following is a summary of our non-vested internal performance awards outstanding at September 30, 2021: Number of Weighted Outstanding at December 31, 2020 1,099,102 $ 5.92 Units granted (a) 303,231 9.81 Vested and issued (b) ( 306,978 ) 12.20 Forfeited — — Outstanding at September 30, 2021 1,095,355 $ 7.80 (a) Amounts granted reflect the number of performance units granted; however, the actual payout of shares will be between zero and 200 % depending on achievement of specifically identified performance targets. Units granted in first quarter 2021 were to our CEO, CFO and COO only. (b) For certain of the PS-PSUs and RS-PSUs awards issued during 2018 the aggregate payout was approximately 137 % of target for the March 2018 grants with a positive performance adjustment of 290,140 shares. We recorded compensation expense of $ 3.8 million in first nine months 2021 compared to expense of $ 2.3 million in first nine months 2020. TSR Awards. TSR-PSUs granted are earned, or not earned, based on the comparative performance of Range’s common stock measured against a predetermined group of companies in the peer group over a three-year performance period. The fair value of the TSR-PSUs is estimated on the date of grant using a Monte Carlo simulation model which utilizes multiple input variables that determine the probability of satisfying the market condition stipulated in the award grant and calculates the fair value of the award. The fair value is recognized as stock-based compensation expense over the three-year performance period. Expected volatilities utilized in the model were estimated using a combination of a historical period consistent with the remaining performance period of three years and option implied volatilities. The risk-free interest rate was based on the United States Treasury rate for a term commensurate with the life of the grant. The following assumptions were used to estimate the fair value of TSR-PSUs granted during first nine months 2021 and 2020: Nine Months Ended 2021 2020 Risk-free interest rate 0.2 % 1.4 % Expected annual volatility 75 % 65 % Grant date fair value per unit $ 12.58 $ 3.85 The following is a summary of our non-vested TSR-PSUs award activities: Number of Weighted Outstanding at December 31, 2020 1,249,524 $ 9.55 Units granted (a) 223,687 12.58 Vested and issued (b) ( 325,217 ) 18.51 Forfeited — — Outstanding at September 30, 2021 1,147,994 $ 7.60 (a) These amounts reflect the number of performance units granted. The actual payout of shares may be between zero and 200 % of the performance units granted depending on the total shareholder return ranking compared to our peer companies at the vesting date. (b) Includes TSR-PSUs awards issued related to the 2018 performance period where the return on our common stock was negative and therefore, the performance multiple and actual payout was reduced to 100 %. We recorded TSR-PSUs compensation expense of $ 1.9 million in first nine months 2021 compared to $ 1.9 million in the same period of 2020. Fair value is amortized over the performance period with no adjustment to the expense recorded for actual targets achieved. Other Post Retirement Benefits Effective fourth quarter 2017, as part of our officer succession plan, we implemented a post retirement benefit plan to assist in providing health care to officers who are active employees (including their spouses) and have met certain age and service requirements. These benefits are not funded in advance and are provided up to age 65 or at the date they become eligible for Medicare, subject to various cost-sharing features. There was approximately $ 90,000 of estimated prior service costs amortized from accumulated other comprehensive income into general and administrative expense in both the three months ended September 30, 2021 and 2020 and approximately $ 275,000 amortized in both the nine months ended September 30, 2021 and 2020. Those employees that qualify for this retirement health care plan are required to provide reasonable notice of retirement and provide one year of service after an equity grant date to be fully vested in the grant. Deferred Compensation Plan Our deferred compensation plan gives non-employee directors and officers the ability to defer all or a portion of their salaries, bonuses or director fees and invest in Range common stock or make other investments at the individual’s discretion. Range provides a partial matching contribution to officers which vests over three years . In early 2021, vesting for the matching contribution was changed to a three-year cliff vesting schedule. The assets of the plan are held in a grantor trust, which we refer to as the Rabbi Trust, and are therefore available to satisfy the claims of our general creditors in the event of bankruptcy or insolvency. Our stock held in the Rabbi Trust is treated as a liability award as employees are allowed to take withdrawals from the Rabbi Trust either in cash or in Range stock. The liability for the vested portion of the stock held in the Rabbi Trust is reflected as deferred compensation liability in the accompanying consolidated balance sheets and is adjusted to fair value each reporting period by a charge or credit to deferred compensation plan expense on our consolidated statements of operations. The assets of the Rabbi Trust, other than our common stock, are invested in marketable securities and reported at their market value as other assets in the accompanying consolidated balance sheets. The deferred compensation liability reflects the vested market value of the marketable securities and Range stock held in the Rabbi Trust. Changes in the market value of the marketable securities and changes in the fair value of the deferred compensation plan liability are charged or credited to deferred compensation plan expense each quarter. We recorded a mark-to-market loss of $ 34.3 million in third quarter 2021 compared to a mark-to-market loss of $ 6.2 million in third quarter 2020. We recorded mark-to-market loss of $ 89.6 million in first nine months 2021 compared to a loss of $ 10.3 million in first nine months 2020. The Rabbi Trust held 6.4 million shares ( 5.3 million of which were vested) of Range stock at September 30, 2021 compared to 6.1 million shares ( 5.0 million of which were vested) at December 31, 2020.

Exit and Termination Costs

Exit and Termination Costs	9 Months Ended
	Sep. 30, 2021
Restructuring And Related Activities [Abstract]
Exit and Termination Costs	(14) EXIT AND TERMINATION COSTS Exit Costs In August 2020, we sold our North Louisiana assets and retained certain gathering, transportation and processing obligations which extend into 2030. These are contracts where we will not realize any future benefit. The estimated obligations are included in current and long-term divestiture contract obligation in our consolidated balance sheets. In first nine months 2021, we recorded accretion expense of $ 36.6 million. In second quarter 2021, we recorded a net favorable adjustment of $ 28.2 million to reduce this obligation due to a reduction of certain contractual payments compared to those originally estimated and a change to our estimated drilling plans of the buyer. The estimated discounted divestiture contract obligation was $ 426.6 million at September 30, 2021. In second quarter 2020, we negotiated capacity releases on certain transportation pipelines in Pennsylvania effective May 31, 2020 and extending through the remainder of the contract. We recorded termination costs of $ 10.4 million which represented the discounted present value of our remaining obligation to the third-party. The estimated remaining discounted obligation for these transportation capacity releases as of September 30, 2021 was $ 7.9 million. Termination Costs In third quarter 2020, we completed the sale of our North Louisiana assets. We recorded $ 2.5 million of severance costs and stock-based compensation expense associated with this sale. In third quarter 2020, we also announced an additional reduction in our work force and recorded $ 3.7 million of severance costs and stock-based compensation expense related to this reduction in force. In first quarter 2020, we completed the sale of our shallow legacy assets in northwestern Pennsylvania and we recorded $ 1.6 million of severance costs which is primarily related to the sale of these assets. The following summarizes our exit and termination costs for the three and nine months ended September 30, 2021 and 2020 (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Severance costs $ — $ 4,191 $ 509 $ 5,638 Transportation contract capacity releases (including 186 233 580 10,678 Divestiture contract obligation (including accretion of 11,603 486,689 8,468 486,689 One-time minimum volume commitment contract — 28,500 — 28,500 Stock-based compensation — 2,020 — 2,020 $ 11,789 $ 521,633 $ 9,557 $ 533,525 The following details the accrued exit and termination cost liability activity for the nine months ended September 30, 2021 (in thousands): Exit (1) Termination Balance at December 31, 2020 $ 493,543 $ 1,454 Accrued severance costs — 509 Accretion of discount 37,213 — Divestiture contract obligation - changes in estimate ( 28,165 ) — Payments ( 68,152 ) ( 1,695 ) Balance at September 30, 2021 $ 434,439 $ 268 (1) Includes the divestiture contract obligation and the transportation contract capacity release obligation.

Capital Stock

Capital Stock	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Capital Stock	(15) CAPITAL STOCK We have authorized capital stock of 485.0 million shares which includes 475.0 million shares of common stock and 10.0 million shares of preferred stock. We currently have no preferred stock issued or outstanding. The following is a schedule of changes in the number of common shares outstanding since the beginning of 2020: Nine Months Year Beginning balance 246,348,092 249,630,803 Restricted stock grants 1,293,126 3,390,358 Restricted stock units vested 1,485,557 1,226,473 Performance stock units issued 640,468 279,420 Performance stock dividends 13,966 18,700 Treasury shares 3,149 ( 8,197,662 ) Ending balance 249,784,358 246,348,092 Stock Repurchase Program In October 2019, our Board of Directors authorized a $ 100.0 million common stock repurchase program. Under this program, we may repurchase shares in open market transactions, from time to time, in accordance with applicable SEC rules and federal securities laws. The following is a schedule of the change in treasury shares for the three and nine months ended September 30, 2021: Three Months Nine Months Beginning balance 10,005,504 10,005,795 Rabbi trust shares distributed/sold ( 2,858 ) ( 3,149 ) Shares repurchased — — Ending balance 10,002,646 10,002,646

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	9 Months Ended
	Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	(16) SUPPLEMENTAL CASH FLOW INFORMATION Nine Months Ended 2021 2020 (in thousands) Net cash provided from operating activities included: Income taxes (paid) refunded from taxing authorities $ ( 2,661 ) $ 343 Interest paid ( 175,195 ) ( 145,319 ) Non-cash investing and financing activities included: Increase in asset retirement costs capitalized 2,879 4,587 Decrease in accrued capital expenditures ( 11,373 ) ( 38,942 )

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	(17) COMMITMENTS AND CONTINGENCIES Litigation We are the subject of, or party to, a number of pending or threatened legal actions, administrative proceedings or investigations arising in the ordinary course of our business including, but not limited to, royalty claims, contract claims and environmental claims. While many of these matters involve inherent uncertainty, we believe that the amount of the liability, if any, ultimately incurred with respect to these actions, proceedings or claims will not have a material adverse effect on our consolidated financial position as a whole or on our liquidity, capital resources or future annual results of operations. When deemed necessary, we establish reserves for certain legal proceedings. The establishment of a reserve is based on an estimation process that includes the advice of legal counsel and subjective judgment of management. While management believes these reserves to be adequate, it is reasonably possible we could incur additional losses with respect to those matters in which reserves have been established. We will continue to evaluate our litigation on a quarterly basis and will establish and adjust any litigation reserves as appropriate to reflect our assessment of the then current status of litigation. We have incurred and will continue to incur capital, operating and remediation expenditures as a result of environmental laws and regulations. As of September 30, 2021, liabilities for remediation were not material. We are not aware of any environmental claims existing as of September 30, 2021 that have not been provided for or would otherwise have a material impact on our financial position or results of operations. Environmental liabilities normally involve estimates that are subject to revision until final resolution, settlement or remediation occurs. On March 4, 2021 a punitive class action lawsuit was filed in the Western District of Pennsylvania in Case No. 2:21-CV-301 (Jacobowitz v. Range Resources Corporation et al.) in which the Plaintiff seeks to represent a class of Range stockholders who purchased or acquired stock from April 29, 2016 to February 10, 2021. This lawsuit has been transferred to the U.S. District Court for the Northern District of Texas (Fort Worth Division). The lawsuit claims that Range misclassified certain wells as inactive rather than having plugged the wells and that such alleged misclassification affected the determination of our asset retirement obligation accrual. The lawsuit claims that the disclosure of a $ 294,000 agreed penalty that we paid to the Pennsylvania Department of Environmental Protection (DEP) in connection with the DEP’s investigation of our application for inactive status for a small number of our wells which the DEP disclosed during market hours on February 10, 2021 was the basis for the Plaintiffs’ discovery of the alleged misrepresentations. We maintain that the factual allegations and the claims made in the litigation are baseless; there were no misrepresentations made and our asset retirement obligation was properly calculated. We also maintain that the market fully absorbed the information disclosed by the DEP on February 10, 2021 and the stock price on that day did not decrease. Given our view of the litigation as baseless, we plan to vigorously defend the litigation and moved for its dismissal.

Suspended Exploratory Well Cost

Suspended Exploratory Well Costs	9 Months Ended
	Sep. 30, 2021
Capitalized Exploratory Well Costs [Abstract]
Suspended Exploratory Well Costs	( 18) SUSPENDED EXPLORATORY WELL COSTS We capitalize exploratory well costs until a determination is made that the well has either found proved reserves or that it is impaired. Capitalized exploratory well costs are presented in natural gas and oil properties in the accompanying consolidated balance sheets. If an exploratory well is determined to be impaired, the well costs are charged to exploration expense in the accompanying consolidated statements of operations. The following table reflects the changes in capitalized exploratory well costs for the nine months ended September 30, 2021 (in thousands): 2021 Balance at beginning of period $ 7,709 Additions to capitalized exploratory well costs pending the 6,299 Reclassifications to wells, facilities and equipment based on ( 14,008 ) Capitalized exploratory well costs, charged to expense — Balance at end of period $ — Less exploratory well costs that have been capitalized for a period $ — Capitalized exploratory well costs that have been capitalized for a $ —

Costs Incurred for Property Acq

Costs Incurred for Property Acquisition, Exploration and Development	9 Months Ended
	Sep. 30, 2021
Extractive Industries [Abstract]
Costs Incurred for Property Acquisition, Exploration and Development	(19) Costs Incurred for Property Acquisition, Exploration and Development (a) Nine Months Year (in thousands) Acquisitions: Acreage purchases $ 14,014 $ 26,166 Development 298,300 369,093 Exploration: Drilling 6,299 7,709 Expense 15,331 31,376 Stock-based compensation expense 1,116 1,279 Gas gathering facilities: Development 2,846 3,694 Subtotal 337,906 439,317 Asset retirement obligations 2,879 2,610 Total costs incurred $ 340,785 $ 441,927 (a) Includes costs incurred whether capitalized or expensed.

Basis of Presentation (Policies

Basis of Presentation (Policies)	9 Months Ended
	Sep. 30, 2021
Organization Consolidation And Presentation Of Financial Statements [Abstract]
New Accounting Standards	Not Yet Adopted None that are expected to have a material impact on our financial statements.

Revenues from Contracts with _2

Revenues from Contracts with Customers (Tables)	9 Months Ended
	Sep. 30, 2021
Revenue From Contract With Customer [Abstract]
Disaggregation of Revenue by Identified Revenue Stream	Revenue attributable to each of our identified revenue streams is disaggregated below (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Natural gas sales $ 494,917 $ 211,638 $ 1,152,283 $ 679,094 NGLs sales 309,232 149,263 795,173 416,885 Oil sales 45,156 20,652 127,051 66,928 Total natural gas, NGLs and oil sales 849,305 381,553 2,074,507 1,162,907 Sales of purchased natural gas 101,095 39,180 231,335 94,364 Sales of purchased NGLs 2,764 1,084 3,912 3,230 Other marketing revenue (1) 1,695 2,218 13,421 7,128 Total $ 954,859 $ 424,035 $ 2,323,175 $ 1,267,629 (1) The nine months ended September 30, 2021 includes $ 8.8 million received as part of a capacity release agreement.

Income (Loss) Per Common Share

Income (Loss) Per Common Share (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Computations of Basic and Diluted Income (Loss) Per Common Share	Basic income or loss per share attributable to common shareholders is computed as (1) income or loss attributable to common shareholders (2) less income allocable to participating securities (3) divided by weighted average basic shares outstanding. Diluted income or loss per share attributable to common shareholders is computed as (1) basic income or loss attributable to common shareholders (2) plus diluted adjustments to income allocable to participating securities (3) divided by weighted average diluted shares outstanding. The following sets forth a reconciliation of income or loss attributable to common shareholders to basic income or loss attributable to common shareholders to diluted income or loss attributable to common shareholders (in thousands, except per share amounts): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Net loss, as reported $ ( 350,267 ) $ ( 748,790 ) $ ( 479,588 ) $ ( 750,178 ) Participating earnings (a) — — — — Basic net loss attributed to common shareholders ( 350,267 ) ( 748,790 ) ( 479,588 ) ( 750,178 ) Reallocation of participating earnings (a) — — — — Diluted net loss attributed to common $ ( 350,267 ) $ ( 748,790 ) $ ( 479,588 ) $ ( 750,178 ) Net loss per common share: Basic $ ( 1.44 ) $ ( 3.12 ) $ ( 1.98 ) $ ( 3.10 ) Diluted $ ( 1.44 ) $ ( 3.12 ) $ ( 1.98 ) $ ( 3.10 ) (a) Restricted Stock Awards represent participating securities because they participate in nonforfeitable dividends or distributions with common equity owners. Income allocable to participating securities represents the distributed and undistributed earnings attributable to the participating securities. Participating securities, however, do not participate in undistributed net losses.
Basic Weighted Average Common Shares Outstanding and Diluted Weighted Average Common Shares Outstanding	The following details weighted average common shares outstanding and diluted weighted average common shares outstanding (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Weighted average common shares outstanding – basic and diluted 243,311 239,895 242,692 241,770

Capitalized Costs and Accumul_2

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Tables)	9 Months Ended
	Sep. 30, 2021
Extractive Industries [Abstract]
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	September 30, December 31, (in thousands) Natural gas properties: Properties subject to depletion $ 9,203,586 $ 8,891,348 Unproved properties 864,659 859,766 Total 10,068,245 9,751,114 Accumulated depletion and depreciation ( 4,330,289 ) ( 4,064,305 ) Net capitalized costs $ 5,737,956 $ 5,686,809 (a) Includes capitalized asset retirement costs and the associated accumulated amortization.

Indebtedness (Tables)

Indebtedness (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Debt Outstanding	We had the following debt outstanding as of the dates shown below (bank debt interest rate at September 30, 2021 is shown parenthetically). No interest was capitalized during the nine months ended September 30, 2021 or the year ended December 31, 2020 (in thousands). September 30, December 31, Bank debt ( 2.4 %) $ 30,000 $ 702,000 Senior notes: 4.875 % senior notes due 2025 750,000 750,000 5.00 % senior notes due 2022 169,589 169,589 5.00 % senior notes due 2023 532,335 532,335 5.75 % senior notes due 2021 — 25,496 5.875 % senior notes due 2022 48,528 48,528 8.25 % senior notes due 2029 600,000 — 9.25 % senior notes due 2026 850,000 850,000 Other senior notes due 2022 — 490 Total senior notes 2,950,452 2,376,438 Senior subordinated notes: 5.00 % senior subordinated notes due 2022 — 9,730 5.00 % senior subordinated notes due 2023 — 7,712 5.75 % senior subordinated notes due 2021 — 19,896 Total senior subordinated notes — 37,338 Total debt 2,980,452 3,115,776 Unamortized premium 254 457 Unamortized debt issuance costs ( 32,326 ) ( 30,625 ) Total debt net of debt issuance costs 2,948,380 3,085,608 Less current maturities of long-term debt ( 217,909 ) ( 45,356 ) Total long-term debt $ 2,730,471 $ 3,040,252
Early Redemption of Senior and Senior Subordinated Notes	In first quarter 2021, based on the terms of the indentures governing certain of our senior and senior subordinated notes, we notified the trustee that we were electing to redeem the outstanding principal amounts of the following notes (in thousands): Outstanding 5.75% senior notes due 2021 $ 25,496 5.875% senior notes due 2022 $ 490 5.75% senior subordinated notes 2021 $ 19,896 5.00% senior subordinated notes 2022 $ 9,730 5.00% senior subordinated notes 2023 $ 7,712

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	9 Months Ended
	Sep. 30, 2021
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligation	A reconciliation of our liability for plugging and abandonment costs for the nine months ended September 30, 2021 and the year ended December 31, 2020 is as follows (in thousands): Nine Months Year Beginning of period $ 79,822 $ 251,076 Liabilities incurred 88 1,483 Acquisitions — 123 Liabilities settled ( 5,719 ) ( 4,634 ) Disposition of wells — ( 176,748 ) Accretion expense 4,257 7,518 Change in estimate 2,856 1,004 End of period 81,304 79,822 Less current portion ( 6,689 ) ( 6,689 ) Long-term asset retirement obligations $ 74,615 $ 73,133

Derivative Activities (Tables)

Derivative Activities (Tables)	9 Months Ended
	Sep. 30, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Volumes Hedged and Average Hedge Prices	The following table sets forth our commodity-based derivative volumes by year as of September 30, 2021, excluding our basis and freight swaps and divestiture contingent consideration which are discussed separately below: Period Contract Type Volume Hedged Weighted Average Hedge Price Swap Sold Put Floor Ceiling Natural Gas (1) 2021 Swaps 583,152 Mmbtu/day $ 2.84 2021 Collars 227,391 Mmbtu/day $ 2.87 $ 3.42 2021 Three-way Collars 339,457 Mmbtu/day $ 2.26 $ 2.62 $ 3.04 2022 Swaps 382,329 Mmbtu/day $ 3.11 2022 Collars 213,438 Mmbtu/day $ 3.26 $ 3.70 2022 Three-way Collars 251,781 Mmbtu/day $ 2.37 $ 3.03 $ 3.77 January - March 2022 Calls 80,000 Mmbtu/day $ 6.02 2023 Swaps 60,000 Mmbtu/day $ 3.27 Crude Oil 2021 Swaps 7,500 bbls/day $ 56.92 2022 Swaps 5,811 bbls/day $ 59.59 2023 Swaps 500 bbls/day $ 63.50 NGLs (C3-Propane) 2021 Swaps 6,000 bbls/day $ 1.17 /gallon 2021 Collars 4,000 bbls/day $ 1.00 /gallon $ $ 1.20 /gallon NGLs (NC4-Normal Butane) 2021 Swaps 2,663 bbls/day $ 1.17 /gallon 2021 Collars 2,000 bbls/day $ 1.00 /gallon $ 1.20 /gallon NGLs (C5-Natural Gasoline) 2021 Swaps 2,000 bbls/day $ 1.41 /gallon 2021 Collars 3,000 bbls/day $ 1.35 /gallon $ 1.55 /gallon January - March 2022 Swaps 2,656 bbls/day $ 1.59 /gallon January - March 2022 Collars 2,000 bbls/day $ 1.45 /gallon $ 1.60 /gallon (1) We also sold natural gas call swaptions of 80,000 Mmbtu/day for 2022 at a weighted average price of $ 2.80 and 70,000 Mmbtu/day for 2023 at a weighted average price of $3.04 .
Combined Fair Value of Derivatives, by Consolidated Balance Sheets	The tables below provide additional information relating to our master netting arrangements with our derivative counterparties (in thousands): September 30, 2021 Gross Gross Net Amounts Derivative assets: Natural gas –swaps $ 5,574 $ ( 5,574 ) $ — –collars 193 ( 193 ) — –three-way collars 2 ( 2 ) — –basis swaps 15,633 ( 12,187 ) 3,446 Crude oil –swaps 10 ( 10 ) — NGLs –C3 propane spread swaps 8,367 ( 8,367 ) — −C5 natural gasoline swaps 17 ( 17 ) — Freight −swaps 27 ( 30 ) ( 3 ) Divestiture contingent consideration 50,220 — 50,220 $ 80,043 $ ( 26,380 ) $ 53,663 September 30, 2021 Gross Gross Net Amounts Derivative (liabilities): Natural gas –swaps $ ( 359,243 ) $ 5,574 $ ( 353,669 ) –swaptions ( 60,132 ) — ( 60,132 ) –collars ( 93,418 ) 193 ( 93,225 ) –three-way collars ( 200,479 ) 2 ( 200,477 ) –calls ( 10,018 ) — ( 10,018 ) –basis swaps ( 7,160 ) 12,187 5,027 Crude oil –swaps ( 34,274 ) 10 ( 34,264 ) NGLs –C3 propane spread swaps ( 7,973 ) 8,367 394 –C3 propane swaps ( 6,140 ) — ( 6,140 ) –C3 collars ( 3,787 ) — ( 3,787 ) –NC4 butane swaps ( 3,991 ) — ( 3,991 ) –NC4 butane collars ( 2,797 ) — ( 2,797 ) –C5 natural gasoline swaps ( 3,908 ) 17 ( 3,891 ) –C5 natural gasoline collars ( 3,728 ) — ( 3,728 ) Freight –swaps ( 53 ) 30 ( 23 ) $ ( 797,101 ) $ 26,380 $ ( 770,721 ) December 31, 2020 Gross Gross Amounts Net Amounts of Derivative assets: Natural gas –swaps $ 33,559 $ ( 16,821 ) $ 16,738 –collars 7,016 ( 2,329 ) 4,687 –three-way collars 535 ( 6,139 ) ( 5,604 ) –basis swaps 7,894 ( 3,502 ) 4,392 Crude oil –swaps 2,465 ( 829 ) 1,636 NGLs –C3 propane spread swaps 4,863 ( 4,863 ) — –C3 propane collars — ( 107 ) ( 107 ) Freight –swaps 2,310 — 2,310 Divestiture contingent consideration 15,960 — 15,960 $ 74,602 $ ( 34,590 ) $ 40,012 December 31, 2020 Gross Gross Amounts Net Amounts of Derivative (liabilities): Natural gas –swaps $ ( 10,120 ) $ 16,821 $ 6,701 –swaptions ( 9,803 ) — ( 9,803 ) –collars — 2,329 2,329 –three-way collars ( 18,353 ) 6,139 ( 12,214 ) –basis swaps ( 4,197 ) 3,502 ( 695 ) Crude oil –swaps ( 5,471 ) 829 ( 4,642 ) NGLs –C3 propane spread swaps ( 4,069 ) 4,863 794 –C3 propane swaps ( 8,243 ) — ( 8,243 ) –C3 propane collars ( 3,086 ) 107 ( 2,979 ) –C5 natural gasoline swaps ( 4,897 ) — ( 4,897 ) –C5 natural gasoline calls ( 546 ) — ( 546 ) –NC4 butane swaps ( 651 ) — ( 651 ) –NC4 butane collars ( 401 ) — ( 401 ) Freight –swaps ( 1,206 ) — ( 1,206 ) $ ( 71,043 ) $ 34,590 $ ( 36,453 )
Effects of Derivatives on Consolidated Statements of Operations	The effects of our derivatives on our consolidated statements of operations are summarized below (in thousands): Derivative Fair Value (Loss) Income Three Months Ended Nine Months Ended 2021 2020 2021 2020 Commodity swaps $ ( 332,855 ) $ ( 91,425 ) $ ( 558,186 ) $ 142,413 Swaptions ( 33,718 ) ( 14,166 ) ( 50,329 ) ( 15,520 ) Three-way collars ( 173,344 ) ( 20,705 ) ( 226,176 ) ( 38,267 ) Collars ( 106,340 ) ( 16,893 ) ( 158,562 ) ( 14,336 ) Calls ( 10,018 ) ( 255 ) ( 10,793 ) ( 12 ) Basis swaps ( 8,469 ) 15,587 11,054 31,750 Freight swaps ( 346 ) 2,737 ( 1,050 ) ( 4,276 ) Divestiture contingent consideration 12,870 430 34,260 430 Total $ ( 652,220 ) $ ( 124,690 ) $ ( 959,782 ) $ 102,182

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value	The following tables present the fair value hierarchy for assets and liabilities measured at fair value, on a recurring basis (in thousands): Fair Value Measurements at September 30, 2021 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation $ 66,833 $ — $ — $ 66,833 Commodity price derivatives –swaps — ( 401,955 ) — ( 401,955 ) –collars — ( 93,225 ) ( 10,312 ) ( 103,537 ) –three-way collars — ( 200,477 ) — ( 200,477 ) –calls — ( 10,018 ) ( 10,018 ) –basis swaps — 8,867 — 8,867 –swaptions — — ( 60,132 ) ( 60,132 ) Derivatives–freight swaps — ( 26 ) — ( 26 ) Divestiture contingent consideration — 50,220 — 50,220 Fair Value Measurements at December 31, 2020 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation $ 63,942 $ — $ — $ 63,942 Commodity price derivatives –swaps — 6,642 — 6,642 –calls — — ( 546 ) ( 546 ) –collars — 7,016 ( 3,487 ) 3,529 –three-way collars — ( 17,818 ) — ( 17,818 ) –basis swaps — 4,491 — 4,491 –swaptions — — ( 9,803 ) ( 9,803 ) Derivatives–freight swaps — 1,104 — 1,104 Divesture contingent consideration — 15,960 — 15,960
Carrying Amounts and Fair Values of Financial Instruments	The following presents the carrying amounts and the fair values of our financial instruments as of September 30, 2021 and December 31, 2020 (in thousands): September 30, 2021 December 31, 2020 Carrying Fair Carrying Fair Assets: Commodity swaps, collars and basis swaps $ 3,443 $ 3,443 $ 24,052 $ 24,052 Divestiture contingent consideration 50,220 50,220 15,960 15,960 Marketable securities (a) 66,833 66,833 63,942 63,942 (Liabilities): Commodity swaps, collars and basis swaps ( 770,721 ) ( 770,721 ) ( 36,453 ) ( 36,453 ) Bank credit facility (b) ( 30,000 ) ( 30,000 ) ( 702,000 ) ( 702,000 ) 5.75 % senior notes due 2021 (b) — — ( 25,496 ) ( 25,474 ) 5.00 % senior notes due 2022 (b) ( 169,589 ) ( 172,667 ) ( 169,589 ) ( 170,128 ) 5.875 % senior notes due 2022 (b) ( 48,528 ) ( 49,383 ) ( 48,528 ) ( 48,471 ) Other senior notes due 2022 (b) — — ( 490 ) ( 490 ) 5.00 % senior notes due 2023 (b) ( 532,335 ) ( 552,463 ) ( 532,335 ) ( 521,699 ) 4.875 % senior notes due 2025 (b) ( 750,000 ) ( 791,715 ) ( 750,000 ) ( 707,918 ) 9.25 % senior notes due 2026 (b) ( 850,000 ) ( 926,832 ) ( 850,000 ) ( 888,208 ) 8.25 % senior notes due 2029 (b) ( 600,000 ) ( 674,994 ) — — 5.75 % senior subordinated notes due 2021 (b) — — ( 19,896 ) ( 19,589 ) 5.00 % senior subordinated notes due 2022 (b) — — ( 9,730 ) ( 9,247 ) 5.00 % senior subordinated notes due 2023 (b) — — ( 7,712 ) ( 6,604 ) Deferred compensation plan (c) ( 184,882 ) ( 184,882 ) ( 96,563 ) ( 96,563 )

Stock-based Compensation Plans

Stock-based Compensation Plans (Tables)	9 Months Ended
	Sep. 30, 2021
Allocation of Stock-Based Compensation by Functional Category	The following details the allocation of stock-based compensation to functional expense categories (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Direct operating expense $ 319 $ ( 74 ) $ 986 $ 810 Brokered natural gas and marketing expense 446 324 1,339 905 Exploration expense 368 189 1,116 891 General and administrative expense 9,845 6,863 28,632 24,071 Termination costs — 2,020 — 2,020 Total stock-based compensation expense $ 10,978 $ 9,322 $ 32,073 $ 28,697
Restricted Stock and Restricted Stock Units Outstanding	The following is a summary of the status of our non-vested restricted stock outstanding at September 30, 2021: Restricted Stock Restricted Stock Shares Weighted Shares Weighted Outstanding at December 31, 2020 2,815,860 $ 4.97 1,186,636 $ 4.18 Granted 2,340,114 10.20 1,288,729 9.55 Vested ( 1,820,011 ) 7.37 ( 1,316,542 ) 6.98 Forfeited ( 79,732 ) 6.30 — — Outstanding at September 30, 2021 3,256,231 $ 7.36 1,158,823 $ 6.98
Schedule of Share Based Payment Award Performance Stock Awards Valuation Assumptions	The following assumptions were used to estimate the fair value of TSR-PSUs granted during first nine months 2021 and 2020: Nine Months Ended 2021 2020 Risk-free interest rate 0.2 % 1.4 % Expected annual volatility 75 % 65 % Grant date fair value per unit $ 12.58 $ 3.85
Performance-based Internal Performance Awards
Summary of Non-Vested Awards Activities	The following is a summary of our non-vested internal performance awards outstanding at September 30, 2021: Number of Weighted Outstanding at December 31, 2020 1,099,102 $ 5.92 Units granted (a) 303,231 9.81 Vested and issued (b) ( 306,978 ) 12.20 Forfeited — — Outstanding at September 30, 2021 1,095,355 $ 7.80
Performance Based TSR - PSUs
Summary of Non-Vested Awards Activities	The following is a summary of our non-vested TSR-PSUs award activities: Number of Weighted Outstanding at December 31, 2020 1,249,524 $ 9.55 Units granted (a) 223,687 12.58 Vested and issued (b) ( 325,217 ) 18.51 Forfeited — — Outstanding at September 30, 2021 1,147,994 $ 7.60 (a) These amounts reflect the number of performance units granted. The actual payout of shares may be between zero and 200 % of the performance units granted depending on the total shareholder return ranking compared to our peer companies at the vesting date. (b) Includes TSR-PSUs awards issued related to the 2018 performance period where the return on our common stock was negative and therefore, the performance multiple and actual payout was reduced to 100 %.

Exit and Termination Costs (Tab

Exit and Termination Costs (Tables)	9 Months Ended
	Sep. 30, 2021
Restructuring And Related Activities [Abstract]
Summary of Exit and Termination Costs	The following summarizes our exit and termination costs for the three and nine months ended September 30, 2021 and 2020 (in thousands): Three Months Ended Nine Months Ended 2021 2020 2021 2020 Severance costs $ — $ 4,191 $ 509 $ 5,638 Transportation contract capacity releases (including 186 233 580 10,678 Divestiture contract obligation (including accretion of 11,603 486,689 8,468 486,689 One-time minimum volume commitment contract — 28,500 — 28,500 Stock-based compensation — 2,020 — 2,020 $ 11,789 $ 521,633 $ 9,557 $ 533,525
Exit and Termination Costs Included in Accrued Liabilities in Consolidated Balance Sheet	The following details the accrued exit and termination cost liability activity for the nine months ended September 30, 2021 (in thousands): Exit (1) Termination Balance at December 31, 2020 $ 493,543 $ 1,454 Accrued severance costs — 509 Accretion of discount 37,213 — Divestiture contract obligation - changes in estimate ( 28,165 ) — Payments ( 68,152 ) ( 1,695 ) Balance at September 30, 2021 $ 434,439 $ 268 (1) Includes the divestiture contract obligation and the transportation contract capacity release obligation.

Capital Stock (Tables)

Capital Stock (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Schedule of Changes in Number of Common Shares Outstanding	The following is a schedule of changes in the number of common shares outstanding since the beginning of 2020: Nine Months Year Beginning balance 246,348,092 249,630,803 Restricted stock grants 1,293,126 3,390,358 Restricted stock units vested 1,485,557 1,226,473 Performance stock units issued 640,468 279,420 Performance stock dividends 13,966 18,700 Treasury shares 3,149 ( 8,197,662 ) Ending balance 249,784,358 246,348,092
Schedule of Change in Treasury Shares	The following is a schedule of the change in treasury shares for the three and nine months ended September 30, 2021: Three Months Nine Months Beginning balance 10,005,504 10,005,795 Rabbi trust shares distributed/sold ( 2,858 ) ( 3,149 ) Shares repurchased — — Ending balance 10,002,646 10,002,646

Supplemental Cash Flow Inform_2

Supplemental Cash Flow Information (Tables)	9 Months Ended
	Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Nine Months Ended 2021 2020 (in thousands) Net cash provided from operating activities included: Income taxes (paid) refunded from taxing authorities $ ( 2,661 ) $ 343 Interest paid ( 175,195 ) ( 145,319 ) Non-cash investing and financing activities included: Increase in asset retirement costs capitalized 2,879 4,587 Decrease in accrued capital expenditures ( 11,373 ) ( 38,942 )

Suspended Exploratory Well Co_2

Suspended Exploratory Well Costs (Tables)	9 Months Ended
	Sep. 30, 2021
Capitalized Exploratory Well Costs [Abstract]
Schedule Of Changes In Capitalized Exploratory Well Costs	The following table reflects the changes in capitalized exploratory well costs for the nine months ended September 30, 2021 (in thousands): 2021 Balance at beginning of period $ 7,709 Additions to capitalized exploratory well costs pending the 6,299 Reclassifications to wells, facilities and equipment based on ( 14,008 ) Capitalized exploratory well costs, charged to expense — Balance at end of period $ — Less exploratory well costs that have been capitalized for a period $ — Capitalized exploratory well costs that have been capitalized for a $ —

Costs Incurred for Property A_2

Costs Incurred for Property Acquisition, Exploration and Development (Tables)	9 Months Ended
	Sep. 30, 2021
Extractive Industries [Abstract]
Costs Incurred for Property Acquisition, Exploration and Development	Nine Months Year (in thousands) Acquisitions: Acreage purchases $ 14,014 $ 26,166 Development 298,300 369,093 Exploration: Drilling 6,299 7,709 Expense 15,331 31,376 Stock-based compensation expense 1,116 1,279 Gas gathering facilities: Development 2,846 3,694 Subtotal 337,906 439,317 Asset retirement obligations 2,879 2,610 Total costs incurred $ 340,785 $ 441,927 (a) Includes costs incurred whether capitalized or expensed.

Dispositions - Additional Infor

Dispositions - Additional Information (Detail) - USD ($)	Aug. 14, 2020	Aug. 31, 2020	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets			$ 78,000		$ 9,230,000		$ 724,000	$ 112,443,000
Proceeds from disposal of assets							237,000	$ 246,083,000
Gross Amounts of Recognized Assets			80,043,000				80,043,000		$ 74,602,000
Contingent Consideration
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gross Amounts of Recognized Assets			$ 50,220,000				50,220,000		$ 15,960,000
North Louisiana
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets		$ (8,100,000)		$ 1,900,000	$ 2,400,000
Fair value of total consideration for sale	$ 260,000,000
Proceeds from disposal of assets	245,000,000
North Louisiana | Contingent Consideration
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gross Amounts of Recognized Assets	$ 15,000,000
North Louisiana | Contingent Consideration | Maximum
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Potential contractual payout of contingent consideration							$ 75,000,000
Northwest Pennsylvania
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets						$ 122,500,000
Proceeds from sale of oil and gas properties						$ 1,000,000

Revenues from Contracts with _3

Revenues from Contracts with Customers - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)RevenueStreams	Dec. 31, 2020USD ($)
Disaggregation of Revenue [Line Items]
Number of revenue streams | RevenueStreams	3
Revenue Contract with Customer
Disaggregation of Revenue [Line Items]
Accounts receivable | $	$ 361.9	$ 237.8

Revenues from Contracts with _4

Revenues from Contracts with Customers - Disaggregation of Revenue by Identified Revenue Stream (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	$ 954,859	$ 424,035	$ 2,323,175	$ 1,267,629
Natural Gas, NGLs and Oil Sales
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	849,305	381,553	2,074,507	1,162,907
Natural Gas, NGLs and Oil Sales | Natural gas sales
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	494,917	211,638	1,152,283	679,094
Natural Gas, NGLs and Oil Sales | NGLs sales
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	309,232	149,263	795,173	416,885
Natural Gas, NGLs and Oil Sales | Oil sales
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	45,156	20,652	127,051	66,928
Brokered Natural Gas, Marketing and Other
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	105,554	42,482	248,668	104,722
Brokered Natural Gas, Marketing and Other | Natural gas sales
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	101,095	39,180	231,335	94,364
Brokered Natural Gas, Marketing and Other | NGLs sales
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	2,764	1,084	3,912	3,230
Brokered Natural Gas, Marketing and Other | Other marketing revenue
Disaggregation of Revenue [Line Items]
Total Revenues from Contracts with Customers	$ 1,695	$ 2,218	$ 13,421	$ 7,128

Revenues from Contracts with _5

Revenues from Contracts with Customers - Disaggregation of Revenue by Identified Revenue Stream (Parenthetical) (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Brokered Natural Gas, Marketing and Other | Other marketing revenue
Disaggregation of Revenue [Line Items]
Revenue received as part of capital release agreement	$ 8.8

Income (Loss) Per Common Shar_2

Income (Loss) Per Common Share - Computations of Basic and Diluted Income (Loss) Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended						9 Months Ended
		Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share Reconciliation [Abstract]
Net loss		$ (350,267)	$ (156,472)	$ 27,151	$ (748,790)	$ (167,583)	$ 166,195	$ (479,588)	$ (750,178)
Participating earnings	[1]	0			0			0	0
Basic net loss attributed to common stockholders		(350,267)			(748,790)			(479,588)	(750,178)
Reallocation of participating earnings	[1]	0			0			0	0
Diluted net loss attributed to common stockholders		$ (350,267)			$ (748,790)			$ (479,588)	$ (750,178)
Net loss per common share:
Basic		$ (1.44)			$ (3.12)			$ (1.98)	$ (3.10)
Diluted		$ (1.44)			$ (3.12)			$ (1.98)	$ (3.10)
[1]	Restricted Stock Awards represent participating securities because they participate in nonforfeitable dividends or distributions with common equity owners. Income allocable to participating securities represents the distributed and undistributed earnings attributable to the participating securities. Participating securities, however, do not participate in undistributed net losses.

Income (Loss) Per Common Shar_3

Income (Loss) Per Common Share - Basic Weighted Average Common Shares Outstanding and Diluted Weighted Average Common Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Weighted Average Number Of Shares Outstanding [Abstract]
Weighted average common shares outstanding - basic and diluted	243,311	239,895	242,692	241,770

Income (Loss) Per Common Shar_4

Income (Loss) Per Common Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Stock excluded from earning per share calculation	6,500,000	6,200,000	6,600,000	5,300,000

Capitalized Costs and Accumul_3

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Detail) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Natural gas properties:
Properties subject to depletion	[1]	$ 9,203,586	$ 8,891,348
Unproved properties	[1]	864,659	859,766
Total	[1]	10,068,245	9,751,114
Accumulated depletion and depreciation	[1]	(4,330,289)	(4,064,305)
Natural gas and oil properties, successful efforts method, net	[1]	$ 5,737,956	$ 5,686,809
[1]	Includes capitalized asset retirement costs and the associated accumulated amortization.

Indebtedness - Additional Infor

Indebtedness - Additional Information (Detail) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Debt Disclosure [Abstract]
Interest capitalized during the period	$ 0	$ 0

Indebtedness - Debt Outstanding

Indebtedness - Debt Outstanding (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Jan. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Senior notes	$ 2,950,452		$ 2,376,438
Senior subordinated notes	0		37,338
Total debt	2,980,452		3,115,776
Unamortized premium	254		457
Unamortized debt issuance costs	(32,326)		(30,625)
Total debt net of debt issuance costs	2,948,380		3,085,608
Less current maturities of long-term debt	(217,909)		(45,356)
Total long-term debt	2,730,471		3,040,252
2.2% Bank Debt | Notes Payable to Banks
Debt Instrument [Line Items]
Bank debt (2.2%)	30,000		702,000
4.875% Senior Notes Due 2025
Debt Instrument [Line Items]
Senior notes	750,000		750,000
5.00% Senior Notes Due 2022
Debt Instrument [Line Items]
Senior notes	169,589		169,589
5.00% Senior Notes Due 2023
Debt Instrument [Line Items]
Senior notes	532,335		532,335
5.75% Senior Notes Due 2021
Debt Instrument [Line Items]
Senior notes	0		25,496
5.875% Senior Notes Due 2022
Debt Instrument [Line Items]
Senior notes	48,528		48,528
8.25% Senior Notes Due 2029
Debt Instrument [Line Items]
Senior notes	600,000		0
Unamortized debt issuance costs		$ (9,200)
Other Senior Notes Due 2022
Debt Instrument [Line Items]
Senior notes	0		490
9.25% Senior Notes Due 2026
Debt Instrument [Line Items]
Senior notes	850,000		850,000
5.00% Senior Subordinated Notes Due 2022
Debt Instrument [Line Items]
Senior subordinated notes	0		9,730
5.00% Senior Subordinated Notes Due 2023
Debt Instrument [Line Items]
Senior subordinated notes	0		7,712
5.75% Senior Subordinated Notes Due 2021
Debt Instrument [Line Items]
Senior subordinated notes	$ 0		$ 19,896

Indebtedness - Debt Outstandi_2

Indebtedness - Debt Outstanding (Parenthetical) (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Jan. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Current maturities of long-term debt	$ 217,909		$ 45,356
4.875% Senior Notes Due 2025
Debt Instrument [Line Items]
Interest rate on notes	4.875%		4.875%
5.00% Senior Notes Due 2022
Debt Instrument [Line Items]
Interest rate on notes	5.00%		5.00%
5.00% Senior Notes Due 2023
Debt Instrument [Line Items]
Interest rate on notes	5.00%		5.00%
5.75% Senior Notes Due 2021
Debt Instrument [Line Items]
Interest rate on notes	5.75%		5.75%
5.875% Senior Notes Due 2022
Debt Instrument [Line Items]
Interest rate on notes	5.875%		5.875%
8.25% Senior Notes Due 2029
Debt Instrument [Line Items]
Interest rate on notes	8.25%	8.25%	8.25%
9.25% Senior Notes Due 2026
Debt Instrument [Line Items]
Interest rate on notes	9.25%		9.25%
5.00% Senior Subordinated Notes Due 2022
Debt Instrument [Line Items]
Interest rate on notes	5.00%		5.00%
5.00% Senior Subordinated Notes Due 2023
Debt Instrument [Line Items]
Interest rate on notes	5.00%		5.00%
5.75% Senior Subordinated Notes Due 2021
Debt Instrument [Line Items]
Interest rate on notes	5.75%		5.75%
Notes Payable to Banks | 2.2% Bank Debt
Debt Instrument [Line Items]
Bank debt percentage	2.40%		2.40%

Indebtedness - Bank Debt - Addi

Indebtedness - Bank Debt - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2021USD ($)Commercialbank	Sep. 30, 2020	Sep. 30, 2021USD ($)Commercialbank	Sep. 30, 2020	Mar. 31, 2021USD ($)	Dec. 31, 2020USD ($)
Debt Instrument [Line Items]
Bank debt	$ 23,976,000		$ 23,976,000			$ 693,123,000
Bank Credit Facility
Debt Instrument [Line Items]
Bank credit facility, maximum amount	4,000,000,000		4,000,000,000
Bank credit facility, borrowing base	$ 3,000,000,000		$ 3,000,000,000		$ 3,000,000,000
Number of commercial banks included in current bank group | Commercialbank	25		25
Maturity date of loan			Apr. 13, 2023
Bank commitments	$ 2,400,000,000		$ 2,400,000,000		$ 2,400,000,000
Bank debt	30,000,000		30,000,000
Undrawn letters of credit	334,600,000		334,600,000
Borrowing capacity available under the commitment amount	$ 2,000,000,000		$ 2,000,000,000
Weighted average interest rate on the bank credit facility	2.00%	2.40%	2.10%	2.70%
Annual rate of commitment fee paid on the undrawn balance			0.30%
Bank Credit Facility | Alternate Base Rate
Debt Instrument [Line Items]
Interest rate margin			0.75%
Bank Credit Facility | LIBOR Rate
Debt Instrument [Line Items]
Interest rate margin			1.75%
Bank Credit Facility | Minimum
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance			0.30%
Bank Credit Facility | Minimum | Alternate Base Rate
Debt Instrument [Line Items]
Base rate on debt	0.25%		0.25%
Bank Credit Facility | Minimum | LIBOR Rate
Debt Instrument [Line Items]
Base rate on debt	1.25%		1.25%
Bank Credit Facility | Maximum
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance			0.375%
Bank Credit Facility | Maximum | Alternate Base Rate
Debt Instrument [Line Items]
Base rate on debt	1.25%		1.25%
Bank Credit Facility | Maximum | LIBOR Rate
Debt Instrument [Line Items]
Base rate on debt	2.25%		2.25%

Indebtedness - New Senior Notes

Indebtedness - New Senior Notes - Additional Information (Detail) - USD ($) $ in Thousands	Apr. 02, 2021	Jan. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Unamortized debt issuance costs			$ 32,326	$ 30,625
Maximum redemption price of notes as percentage of principal amount	100.00%
8.25% Senior Notes Due 2029
Debt Instrument [Line Items]
Aggregate principal amount		$ 600,000
Interest rate on notes		8.25%	8.25%	8.25%
Debt instrument maturity year		2029
Net proceeds after underwriting expenses		$ 590,800
Unamortized debt issuance costs		$ 9,200
Maximum redemption price of notes as percentage of principal amount			100.00%

Indebtedness - Early Redemption

Indebtedness - Early Redemption of Senior and Senior Subordinated Notes (Detail) $ in Thousands	Mar. 31, 2021USD ($)
5.75% Senior Notes Due 2021
Debt Instrument [Line Items]
Outstanding Principal Amount	$ 25,496
5.875% Senior Notes Due 2022
Debt Instrument [Line Items]
Outstanding Principal Amount	490
5.75% Senior Subordinated Notes Due 2021
Debt Instrument [Line Items]
Outstanding Principal Amount	19,896
5.00% Senior Subordinated Notes Due 2022
Debt Instrument [Line Items]
Outstanding Principal Amount	9,730
5.00% Senior Subordinated Notes Due 2023
Debt Instrument [Line Items]
Outstanding Principal Amount	$ 7,712

Indebtedness - Early Redempti_2

Indebtedness - Early Redemption - Additional Information (Detail) - USD ($)	Apr. 02, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Instrument [Line Items]
Maximum redemption price of notes as percentage of principal amount	100.00%
Loss on early extinguishment of debt	$ 63,000	$ (7,821,000)	$ (98,000)	$ 14,093,000

Indebtedness - Senior Subordina

Indebtedness - Senior Subordinated Notes - Additional Information (Detail)	Apr. 02, 2021	Sep. 30, 2021
Debt Instrument [Line Items]
Maximum redemption price of notes as percentage of principal amount	100.00%
Subordinated Debt
Debt Instrument [Line Items]
Maximum redemption price of notes as percentage of principal amount		101.00%

Indebtedness - Guarantees and D

Indebtedness - Guarantees and Debt Covenants - Additional Information (Detail) - Bank Credit Facility - Minimum	Sep. 30, 2021
Debt Instrument [Line Items]
Ratio of debt to EBITDAX	250.00%
Current ratio	100.00%
Present value of proved reserves to total debt	150.00%

Asset Retirement Obligations -

Asset Retirement Obligations - Asset Retirement Obligations (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Asset Retirement Obligation [Abstract]
Beginning of period	$ 79,822	$ 251,076
Liabilities incurred	88	1,483
Acquisitions	0	123
Liabilities settled	(5,719)	(4,634)
Disposition of wells	0	(176,748)
Accretion expense	4,257	7,518
Change in estimate	2,856	1,004
End of period	81,304	79,822
Less current portion	(6,689)	(6,689)
Long-term asset retirement obligations	$ 74,615	$ 73,133

Derivative Activities - Additio

Derivative Activities - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021USD ($)MMBTU	Mar. 31, 2022TPerM	Dec. 31, 2021TPerM
Contingent Consideration
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 34,300
Contingent Consideration | Minimum
Derivative [Line Items]
Derivative assets liabilities at fair value net	50,200,000
Contingent Consideration | North Louisiana | Maximum
Derivative [Line Items]
Potential contractual payout of contingent consideration	75,000,000
Derivatives Excluding Basis Swaps and Freight Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	776,100,000
Commodity | Natural Gas Basis Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 8,500,000
Volume Hedged | MMBTU	204,967,500
Commodity | Propane Spread Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 394,000
Freight | Propane Spread Swaps | Contracts Settle in 2021 | Fair Value, Inputs, Level 2
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ (26,000)
Freight | Swaps | Contracts Settle in 2021 | Fair Value, Inputs, Level 2 | Scenario Forecast
Derivative [Line Items]
Volume Hedged | TPerM			12,000
Freight | Swaps | Contracts Settle in 2022 | Fair Value, Inputs, Level 2 | Scenario Forecast
Derivative [Line Items]
Volume Hedged | TPerM		7,000

Derivative Activities - Derivat

Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Detail)	Sep. 30, 2021BarrelsPerDayMmbtuPerDay$ / MMBTU$ / gal
2021 Commodity Contract | Natural Gas | Swaps
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	583,152	[1]
Weighted Average Hedge Price, Swap	2.84	[1]
2021 Commodity Contract | Natural Gas | Collars
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	227,391	[1]
Weighted average price of hedge, Floor	2.87	[1]
Weighted average price of hedge, Ceiling	3.42	[1]
2021 Commodity Contract | Natural Gas | Three Way Collars
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	339,457	[1]
Weighted Average Hedge Price, Sold Put	2.26	[1]
Weighted average price of hedge, Floor	2.62	[1]
Weighted average price of hedge, Ceiling	3.04	[1]
2021 Commodity Contract | Crude Oil | Swaps
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	7,500
Weighted Average Hedge Price, Swap	56.92
2021 Commodity Contract | NGLs (C3-Propane) | Swaps
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	6,000
Weighted Average Hedge Price, Swap | $ / gal	1.17
2021 Commodity Contract | NGLs (C3-Propane) | Collars
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	4,000
Weighted average price of hedge, Floor | $ / gal	1
Weighted average price of hedge, Ceiling | $ / gal	1.20
2021 Commodity Contract | NGLs (NC4-Normal Butane) | Swaps
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	2,663
Weighted Average Hedge Price, Swap | $ / gal	1.17
2021 Commodity Contract | NGLs (NC4-Normal Butane) | Collars
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	2,000
Weighted average price of hedge, Floor | $ / gal	1
Weighted average price of hedge, Ceiling | $ / gal	1.20
2021 Commodity Contract | NGLs (C5-Natural Gasoline) | Swaps
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	2,000
Weighted Average Hedge Price, Swap | $ / gal	1.41
2021 Commodity Contract | NGLs (C5-Natural Gasoline) | Collars
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	3,000
Weighted average price of hedge, Floor | $ / gal	1.35
Weighted average price of hedge, Ceiling | $ / gal	1.55
2022 Commodity Contract | Natural Gas | Swaps
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	382,329	[1]
Weighted Average Hedge Price, Swap	3.11	[1]
2022 Commodity Contract | Natural Gas | Collars
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	213,438	[1]
Weighted average price of hedge, Floor	3.26	[1]
Weighted average price of hedge, Ceiling	3.70	[1]
2022 Commodity Contract | Natural Gas | Three Way Collars
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	251,781	[1]
Weighted Average Hedge Price, Sold Put	2.37	[1]
Weighted average price of hedge, Floor	3.03	[1]
Weighted average price of hedge, Ceiling	3.77	[1]
2022 Commodity Contract | Crude Oil | Swaps
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	5,811
Weighted Average Hedge Price, Swap	59.59
2023 Commodity Contract | Natural Gas | Swaps
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	60,000	[1]
Weighted Average Hedge Price, Swap	3.27	[1]
2023 Commodity Contract | Crude Oil | Swaps
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	500
Weighted Average Hedge Price, Swap	63.50
January - March 2022 Commodity Contract | Natural Gas | Calls
Derivative [Line Items]
Volume Hedged | MmbtuPerDay	80,000	[1]
Weighted average price of hedge, Ceiling	6.02	[1]
January - March 2022 Commodity Contract | NGLs (C5-Natural Gasoline) | Swaps
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	2,656
Weighted Average Hedge Price, Swap | $ / gal	1.59
January - March 2022 Commodity Contract | NGLs (C5-Natural Gasoline) | Collars
Derivative [Line Items]
Volume Hedged | BarrelsPerDay	2,000
Weighted average price of hedge, Floor | $ / gal	1.45
Weighted average price of hedge, Ceiling | $ / gal	1.60
[1]	We also sold natural gas call swaptions of 80,000 Mmbtu/day for 2022 at a weighted average price of $ 2.80 and 70,000 Mmbtu/day for 2023 at a weighted average price of $3.04

Derivative Activities - Deriv_2

Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Parenthetical) (Detail) - Natural Gas - Call Swaptions	Sep. 30, 2021MmbtuPerDay$ / MMBTU
2022 Commodity Contract
Derivative [Line Items]
Volume Hedged	80,000
Weighted average price of hedge | $ / MMBTU	2.80
2023 Commodity Contract
Derivative [Line Items]
Volume Hedged	70,000

Derivative Activities - Schedul

Derivative Activities - Schedule of Additional Information Related to Master Netting Arrangements with Derivative Counterparties (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Derivative [Line Items]
Gross Amounts of Recognized Assets	$ 80,043	$ 74,602
Gross Amounts Offset in the Balance Sheet	(26,380)	(34,590)
Net Amounts of Assets Presented in the Balance Sheet	53,663	40,012
Gross Amounts of Recognized (Liabilities)	(797,101)	(71,043)
Gross Amounts Offset in the Balance Sheet	26,380	34,590
Net Amounts of (Liabilities) Presented in the Balance Sheet	(770,721)	(36,453)
Contingent Consideration
Derivative [Line Items]
Gross Amounts of Recognized Assets	50,220	15,960
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	50,220	15,960
Commodity | Natural Gas | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	5,574	33,559
Gross Amounts Offset in the Balance Sheet	(5,574)	(16,821)
Net Amounts of Assets Presented in the Balance Sheet	0	16,738
Gross Amounts of Recognized (Liabilities)	(359,243)	(10,120)
Gross Amounts Offset in the Balance Sheet	5,574	16,821
Net Amounts of (Liabilities) Presented in the Balance Sheet	(353,669)	6,701
Commodity | Natural Gas | Swaptions
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	(60,132)	(9,803)
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	(60,132)	(9,803)
Commodity | Natural Gas | Collars
Derivative [Line Items]
Gross Amounts of Recognized Assets	193	7,016
Gross Amounts Offset in the Balance Sheet	(193)	(2,329)
Net Amounts of Assets Presented in the Balance Sheet	0	4,687
Gross Amounts of Recognized (Liabilities)	(93,418)	0
Gross Amounts Offset in the Balance Sheet	193	2,329
Net Amounts of (Liabilities) Presented in the Balance Sheet	(93,225)	2,329
Commodity | Natural Gas | Three Way Collars
Derivative [Line Items]
Gross Amounts of Recognized Assets	2	535
Gross Amounts Offset in the Balance Sheet	(2)	(6,139)
Net Amounts of Assets Presented in the Balance Sheet	0	(5,604)
Gross Amounts of Recognized (Liabilities)	(200,479)	(18,353)
Gross Amounts Offset in the Balance Sheet	2	6,139
Net Amounts of (Liabilities) Presented in the Balance Sheet	(200,477)	(12,214)
Commodity | Natural Gas | Basis Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	15,633	7,894
Gross Amounts Offset in the Balance Sheet	(12,187)	(3,502)
Net Amounts of Assets Presented in the Balance Sheet	3,446	4,392
Gross Amounts of Recognized (Liabilities)	7,160	(4,197)
Gross Amounts Offset in the Balance Sheet	12,187	3,502
Net Amounts of (Liabilities) Presented in the Balance Sheet	(5,027)	(695)
Commodity | Natural Gas | Calls
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	10,018
Gross Amounts Offset in the Balance Sheet	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	10,018
Commodity | Crude Oil | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	10	2,465
Gross Amounts Offset in the Balance Sheet	(10)	(829)
Net Amounts of Assets Presented in the Balance Sheet	0	1,636
Gross Amounts of Recognized (Liabilities)	34,274	(5,471)
Gross Amounts Offset in the Balance Sheet	10	829
Net Amounts of (Liabilities) Presented in the Balance Sheet	34,264	(4,642)
Commodity | NGLs (C3-Propane) | Swaps
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	(6,140)	(8,243)
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	(6,140)	(8,243)
Commodity | NGLs (C3-Propane) | Collars
Derivative [Line Items]
Gross Amounts of Recognized Assets		0
Gross Amounts Offset in the Balance Sheet		(107)
Net Amounts of Assets Presented in the Balance Sheet		(107)
Gross Amounts of Recognized (Liabilities)	(3,787)	(3,086)
Gross Amounts Offset in the Balance Sheet	0	107
Net Amounts of (Liabilities) Presented in the Balance Sheet	(3,787)	(2,979)
Commodity | NGLs (C3-Propane) | Spread Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	8,367	4,863
Gross Amounts Offset in the Balance Sheet	(8,367)	(4,863)
Net Amounts of Assets Presented in the Balance Sheet	0	0
Gross Amounts of Recognized (Liabilities)	(7,973)	(4,069)
Gross Amounts Offset in the Balance Sheet	8,367	4,863
Net Amounts of (Liabilities) Presented in the Balance Sheet	394	794
Commodity | NGLs (NC4-Normal Butane) | Swaps
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	(3,991)	(651)
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	(3,991)	(651)
Commodity | NGLs (NC4-Normal Butane) | Collars
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	(2,797)	(401)
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	(2,797)	(401)
Commodity | NGLs (C5-Natural Gasoline) | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	17
Gross Amounts Offset in the Balance Sheet	17
Net Amounts of Assets Presented in the Balance Sheet	0
Gross Amounts of Recognized (Liabilities)	(3,908)	(4,897)
Gross Amounts Offset in the Balance Sheet	17	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	(3,891)	(4,897)
Commodity | NGLs (C5-Natural Gasoline) | Collars
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)	(3,728)
Gross Amounts Offset in the Balance Sheet	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	(3,728)
Commodity | NGLs (C5-Natural Gasoline) | Calls
Derivative [Line Items]
Gross Amounts of Recognized (Liabilities)		(546)
Gross Amounts Offset in the Balance Sheet		0
Net Amounts of (Liabilities) Presented in the Balance Sheet		(546)
Freight | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	27	2,310
Gross Amounts Offset in the Balance Sheet	30	0
Net Amounts of Assets Presented in the Balance Sheet	(3)	2,310
Gross Amounts of Recognized (Liabilities)	(53)	(1,206)
Gross Amounts Offset in the Balance Sheet	30	0
Net Amounts of (Liabilities) Presented in the Balance Sheet	$ (23)	$ (1,206)

Derivative Activities - Effects

Derivative Activities - Effects of Derivatives on Consolidated Statements of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Derivative [Line Items]
Derivative Fair Value (Loss) Income	$ (652,220)	$ (124,690)	$ (959,782)	$ 102,182
Contingent Consideration
Derivative [Line Items]
Derivative Fair Value (Loss) Income	12,870	430	34,260	430
Swaptions
Derivative [Line Items]
Derivative Fair Value (Loss) Income	(33,718)	(14,166)	(50,329)	(15,520)
Three Way Collars
Derivative [Line Items]
Derivative Fair Value (Loss) Income	(173,344)	(20,705)	(226,176)	(38,267)
Collars
Derivative [Line Items]
Derivative Fair Value (Loss) Income	(106,340)	(16,893)	(158,562)	(14,336)
Calls
Derivative [Line Items]
Derivative Fair Value (Loss) Income	(10,018)	(255)	(10,793)	(12)
Basis Swaps
Derivative [Line Items]
Derivative Fair Value (Loss) Income	(8,469)	15,587	11,054	31,750
Commodity | Swaps
Derivative [Line Items]
Derivative Fair Value (Loss) Income	(332,855)	(91,425)	(558,186)	142,413
Freight | Swaps
Derivative [Line Items]
Derivative Fair Value (Loss) Income	$ (346)	$ 2,737	$ (1,050)	$ (4,276)

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading securities held in the deferred compensation plans	$ 66,833,000	$ 63,942,000
Fair Value, Recurring | Commodity | Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(401,955,000)	6,642,000
Fair Value, Recurring | Commodity | Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(103,537,000)	3,529,000
Fair Value, Recurring | Commodity | Calls
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(10,018,000)	(546,000)
Fair Value, Recurring | Commodity | Basis Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	8,867,000	4,491,000
Fair Value, Recurring | Commodity | Swaptions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(60,132,000)	(9,803,000)
Fair Value, Recurring | Commodity | Three Way Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(200,477,000)	(17,818,000)
Fair Value, Recurring | Freight
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(26,000)	1,104,000
Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	34,300
Contingent Consideration | Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	50,220,000	15,960,000
Fair Value, Inputs, Level 1 | Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading securities held in the deferred compensation plans	66,833,000	63,942,000
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Commodity | Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Commodity | Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Commodity | Calls
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Commodity | Basis Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Commodity | Swaptions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Commodity | Three Way Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 1 | Fair Value, Recurring | Freight
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 1 | Contingent Consideration | Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 2 | Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading securities held in the deferred compensation plans	0	0
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Commodity | Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(401,955,000)	6,642,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Commodity | Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(93,225,000)	7,016,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Commodity | Calls
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(10,018,000)	0
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Commodity | Basis Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	8,867,000	4,491,000
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Commodity | Swaptions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Commodity | Three Way Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(200,477,000)	(17,818,000)
Fair Value, Inputs, Level 2 | Fair Value, Recurring | Freight
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(26,000)	1,104,000
Fair Value, Inputs, Level 2 | Contingent Consideration | Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	50,220,000	15,960,000
Fair Value, Inputs, Level 3 | Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading securities held in the deferred compensation plans	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Commodity | Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Commodity | Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(10,312,000)	(3,487,000)
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Commodity | Calls
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net		(546,000)
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Commodity | Basis Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Commodity | Swaptions
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(60,132,000)	(9,803,000)
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Commodity | Three Way Collars
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 3 | Fair Value, Recurring | Freight
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	0	0
Fair Value, Inputs, Level 3 | Contingent Consideration | Fair Value, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	$ 0	$ 0

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail)	3 Months Ended			9 Months Ended
	Sep. 30, 2021USD ($)	Sep. 30, 2020USD ($)	Mar. 31, 2020USD ($)	Sep. 30, 2021USD ($)Counterparty	Sep. 30, 2020USD ($)	Dec. 31, 2020USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Implied volatilities				42.00%
Interest and dividends	$ 314,000	$ 114,000		$ 541,000	$ 385,000
Mark-to-market gain (loss)	(1,200,000)	3,200,000		3,100,000	$ 234,000,000
Impairment of proved properties and other assets				0
Allowance for doubtful accounts on accounts receivable	373,000			$ 373,000		$ 3,004,000
Number of derivative counterparties | Counterparty				19
Number of counter parties that are not participants in bank credit facility | Counterparty				5
One Counterparty Not in Facility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net derivative asset	9,200,000			$ 9,200,000
Four Counterparties Not in Facility
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net derivative asset	$ 2,400,000			2,400,000
Fair Value, Inputs, Level 2 | Leases
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment of proved properties and other assets		$ 2,000,000
North Louisiana | Fair Value, Inputs, Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment of proved properties and other assets			$ 77,000,000
Maximum | North Louisiana | Contingent Consideration
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Potential contractual payout of contingent consideration				$ 75,000,000
Measurement Input, Price Volatility | Weighted Average | Swaptions | Natural Gas
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Implied volatilities				40.00%
Measurement Input, Price Volatility | Minimum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Implied volatilities				36.00%
Measurement Input, Price Volatility | Maximum
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Implied volatilities				55.00%

Fair Value Measurements - Recon

Fair Value Measurements - Reconciliation of the Beginning and Ending Balances for Derivative Instruments Classified as Level 3 in the Fair Value Hierarchy (Detail) - Fair Value, Inputs, Level 3 $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at December 31, 2020	$ (13,836)
Total losses included in earnings	(42,974)
Additions	(23,385)
Settlements	5,177
Transfers out of Level 3	4,574
Balance at September 30, 2021	$ (70,444)

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Reported Value Measurement
Assets:
Commodity swaps, collars and basis swaps		$ 3,443	$ 24,052
Marketable securities	[1]	66,833	63,942
(Liabilities):
Commodity swaps, collars and basis swaps		(770,721)	(36,453)
Bank credit facility	[2]	(30,000)	(702,000)
Deferred compensation plan	[3]	(184,882)	(96,563)
Reported Value Measurement | Contingent Consideration
Assets:
Commodity swaps, collars and basis swaps		50,220	15,960
Estimate of Fair Value Measurement
Assets:
Commodity swaps, collars and basis swaps		3,443	24,052
Marketable securities	[1]	66,833	63,942
(Liabilities):
Commodity swaps, collars and basis swaps		(770,721)	(36,453)
Bank credit facility	[2]	(30,000)	(702,000)
Deferred compensation plan	[3]	(184,882)	(96,563)
Estimate of Fair Value Measurement | Contingent Consideration
Assets:
Commodity swaps, collars and basis swaps		50,220	15,960
5.75% Senior Notes Due 2021 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	0	(25,496)
5.75% Senior Notes Due 2021 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	0	(25,474)
5.00% Senior Notes Due 2022 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(169,589)	(169,589)
5.00% Senior Notes Due 2022 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(172,667)	(170,128)
5.875% Senior Notes Due 2022 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(48,528)	(48,528)
5.875% Senior Notes Due 2022 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(49,383)	(48,471)
Other Senior Notes Due 2022 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	0	(490)
Other Senior Notes Due 2022 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	0	(490)
5.00% Senior Notes Due 2023 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(532,335)	(532,335)
5.00% Senior Notes Due 2023 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(552,463)	(521,699)
4.875% Senior Notes Due 2025 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(750,000)	(750,000)
4.875% Senior Notes Due 2025 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(791,715)	(707,918)
9.25% Senior Notes Due 2026 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(850,000)	(850,000)
9.25% Senior Notes Due 2026 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(926,832)	(888,208)
5.75% Senior Subordinated Notes Due 2021 | Reported Value Measurement
(Liabilities):
Subordinated debt	[2]	0	(19,896)
5.75% Senior Subordinated Notes Due 2021 | Estimate of Fair Value Measurement
(Liabilities):
Subordinated debt	[2]	0	(19,589)
5.00% Senior Subordinated Notes Due 2022 | Reported Value Measurement
(Liabilities):
Subordinated debt	[2]	0	(9,730)
5.00% Senior Subordinated Notes Due 2022 | Estimate of Fair Value Measurement
(Liabilities):
Subordinated debt	[2]	0	(9,247)
8.25% senior notes due 2029 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(600,000)	0
8.25% senior notes due 2029 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(674,994)	0
5.00% Senior Subordinated Notes Due 2023 | Reported Value Measurement
(Liabilities):
Subordinated debt	[2]	0	(7,712)
5.00% Senior Subordinated Notes Due 2023 | Estimate of Fair Value Measurement
(Liabilities):
Subordinated debt	[2]	$ 0	$ (6,604)
[1]	Marketable securities, which are held in our deferred compensation plans, are actively traded on major exchanges.
[2]	The book value of our bank debt approximates fair value because of its floating rate structure. The fair value of our senior notes and our senior subordinated notes is based on end of period market quotes which are Level 2 inputs.
[3]	The fair value of our deferred compensation plan is updated to the closing price on the balance sheet date which is a Level 1 input.

Fair Value Measurements - Car_2

Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Parenthetical) (Detail)	Sep. 30, 2021	Dec. 31, 2020
5.75% Senior Notes Due 2021
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	5.75%	5.75%
5.00% Senior Notes Due 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	5.00%	5.00%
5.875% Senior Notes Due 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	5.875%	5.875%
5.00% Senior Notes Due 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	5.00%	5.00%
4.875% Senior Notes Due 2025
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	4.875%	4.875%
9.25% Senior Notes Due 2026
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	9.25%	9.25%
5.75% Senior Subordinated Notes Due 2021
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	5.75%	5.75%
8.25% senior notes due 2029
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	8.25%	8.25%
5.00% Senior Subordinated Notes Due 2022
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	5.00%	5.00%
5.00% Senior Subordinated Notes Due 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	5.00%	5.00%

Stock-based Compensation Plan_2

Stock-based Compensation Plans - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2021Plans
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Active equity-based stock plans	2

Stock-based Compensation Plan_3

Stock-based Compensation Plans - Allocation of Stock-Based Compensation by Functional Category (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 10,978	$ 9,322	$ 32,073	$ 28,697
Direct Operating Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	319	(74)	986	810
Brokered Natural Gas and Marketing Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	446	324	1,339	905
Exploration Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	368	189	1,116	891
General and Administrative Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	9,845	6,863	28,632	24,071
Termination Costs
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 0	$ 2,020	$ 0	$ 2,020

Stock-based Compensation Plan_4

Stock-based Compensation Plans - Additional Information 1 (Detail) shares in Thousands	9 Months Ended
	Sep. 30, 2021Awardshares
Restricted Stock Equity Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Performance Share
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of awards available for grant	3
Method of measuring cost of award	In first quarter 2021, our internal performance metrics were changed to focus on debt reduction and to include an environmental component. For shares granted in first quarter 2021, the performance conditions will be measured against internal metrics of Debt/EBITDAX (earnings before interest, taxes, depreciation, amortization and exploration expense) and emission intensity performance. These shares will vest at the end of three years and the three-year performance target was set in first quarter 2021.
Performance Share | Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of share value each unit represents at grant date | shares	1
Performance Based TSR - PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Number of awards available for grant	1
Performance Based TSR - PSUs | Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout of shares granted	0.00%
Performance Based TSR - PSUs | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout of shares granted	200.00%
Performance-based PS-PSUs and RS-PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Number of awards available for grant	2

Stock-based Compensation Plan_5

Stock-based Compensation Plans - Additional Information 2 (Detail) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Restricted Stock Equity Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted	2,340,114	4,500,000
Granted, weighted average grant date fair value	$ 10.20	$ 3.42
Vesting period	3 years
Stock-based compensation expense	$ 15	$ 13.4
Restricted Stock Liability Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted	1,288,729
Granted, weighted average grant date fair value	$ 9.55
Stock-based compensation expense	$ 8.4	$ 7.9
Restricted Stock Liability Awards | Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted	1,200,000	3,300,000
Granted, weighted average grant date fair value	$ 9.30	$ 3.03
Vesting period	3 years	3 years
Restricted Stock Liability Awards | Non employee directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted	102,000	217,000
Granted, weighted average grant date fair value	$ 12.49	$ 5.38
Vesting period	1 year	1 year

Stock-based Compensation Plan_6

Stock-based Compensation Plans - Restricted Stock and Restricted Stock Units Outstanding (Detail) - $ / shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Restricted Stock Equity Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Beginning Balance	2,815,860
Granted	2,340,114	4,500,000
Vested	(1,820,011)
Forfeited	(79,732)
Outstanding, Ending Balance	3,256,231
Outstanding, Beginning Balance, weighted average grant date fair value	$ 4.97
Granted, weighted average grant date fair value	10.20	$ 3.42
Vested and issued, weighted average grant date fair value	7.37
Forfeited, weighted average grant date fair value	6.30
Outstanding, Ending Balance, weighted average grant date fair value	$ 7.36
Restricted Stock Liability Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Beginning Balance	1,186,636
Granted	1,288,729
Vested	(1,316,542)
Forfeited	0
Outstanding, Ending Balance	1,158,823
Outstanding, Beginning Balance, weighted average grant date fair value	$ 4.18
Granted, weighted average grant date fair value	9.55
Vested and issued, weighted average grant date fair value	6.98
Forfeited, weighted average grant date fair value	0
Outstanding, Ending Balance, weighted average grant date fair value	$ 6.98

Stock-based Compensation Plan_7

Stock-based Compensation Plans - Additional Information 3 (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation (income) expense	$ 10,978	$ 9,322	$ 32,073	$ 28,697
Performance-based PS-PSUs and RS-PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			3 years
Performance Share
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation (income) expense			$ 3,800	2,300
Performance Based TSR - PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period			3 years
Stock-based compensation expense			$ 1,900	$ 1,900

Stock-based Compensation Plan_8

Stock-based Compensation Plans - Internal Performance Activities (Detail) - Performance-based Internal Performance Awards	9 Months Ended
	Sep. 30, 2021$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Beginning Balance | shares	1,099,102
Granted | shares	303,231	[1]
Vested and issued | shares	(306,978)	[2]
Forfeited | shares	0
Outstanding, Ending Balance | shares	1,095,355
Outstanding, Beginning Balance, weighted average grant date fair value | $ / shares	$ 5.92
Granted, weighted average grant date fair value | $ / shares	9.81
Vested and issued, weighted average grant date fair value | $ / shares	12.20
Forfeited, weighted average grant date fair value | $ / shares	0
Outstanding, Ending Balance, weighted average grant date fair value | $ / shares	$ 7.80
[1]	Amounts granted reflect the number of performance units granted; however, the actual payout of shares will be between zero and 200 % depending on achievement of specifically identified performance targets. Units granted in first quarter 2021 were to our CEO, CFO and COO only.
[2]	For certain of the PS-PSUs and RS-PSUs awards issued during 2018 the aggregate payout was approximately 137 % of target for the March 2018 grants with a positive performance adjustment of 290,140 shares.

Stock-based Compensation Plan_9

Stock-based Compensation Plans - Internal Performance Activities (Parenthetical) (Detail) - Performance-based PS-PSUs and RS-PSUs - shares		1 Months Ended	9 Months Ended
		Mar. 31, 2018	Sep. 30, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares vested and issued related to performance period number of common stock	[1]		306,978
March 2018 Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Actual payout of shares		137.00%
Shares vested and issued related to performance period number of common stock		290,140
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout of shares granted			0.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout of shares granted			200.00%
[1]	For certain of the PS-PSUs and RS-PSUs awards issued during 2018 the aggregate payout was approximately 137 % of target for the March 2018 grants with a positive performance adjustment of 290,140 shares.

Stock-based Compensation Pla_10

Stock-based Compensation Plans - Valuation Assumptions for Grant Date Fair Value of Performance Awards (Detail) - Performance Shares - $ / shares	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	0.20%	1.40%
Expected annual volatility	75.00%	65.00%
Grant date fair value per unit	$ 12.58	$ 3.85

Stock-based Compensation Pla_11

Stock-based Compensation Plans - TSR - PSUs Activities (Detail) - Performance Based TSR - PSUs	9 Months Ended
	Sep. 30, 2021$ / sharesshares
Summary of Performance Share Unit Awards outstanding, Number of Units
Outstanding, Beginning Balance | shares	1,249,524
Granted | shares	223,687	[1]
Vested and issued | shares	(325,217)	[2]
Forfeited | shares	0
Outstanding, Ending Balance | shares	1,147,994
Summary of Performance Share Unit Awards outstanding, Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance, weighted average grant date fair value | $ / shares	$ 9.55
Granted, weighted average grant date fair value | $ / shares	12.58
Vested and issued, weighted average grant date fair value | $ / shares	18.51
Forfeited, weighted average grant date fair value | $ / shares	0
Outstanding, Ending Balance, weighted average grant date fair value | $ / shares	$ 7.60
[1]	These amounts reflect the number of performance units granted. The actual payout of shares may be between zero and 200 % of the performance units granted depending on the total shareholder return ranking compared to our peer companies at the vesting date.
[2]	Includes TSR-PSUs awards issued related to the 2018 performance period where the return on our common stock was negative and therefore, the performance multiple and actual payout was reduced to 100 %.

Stock-based Compensation Pla_12

Stock-based Compensation Plans - TSR - PSUs Activities (Parenthetical) (Detail) - Performance Based TSR - PSUs	9 Months Ended
	Sep. 30, 2021
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout of shares granted	0.00%
Minimum | March 2018 Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout of shares granted	100.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Potential payout of shares granted	200.00%

Stock-based Compensation Pla_13

Stock-based Compensation Plans - Additional Information 4 (Detail) - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Deferred compensation plan vesting period			3 years
Deferred compensation plan	$ 34,278,000	$ 6,237,000	$ 89,551,000	$ 10,287,000
Shares held in rabbi trust total	6.4		6.4		6.1
Vested shares held in rabbi trust	5.3		5.3		5
Post-Retirement Medical Plan
Defined Benefit Plan Disclosure [Line Items]
Estimated prior service cost amortized from accumulated other comprehensive income into general and administrative expense	$ 90,000	$ 90,000	$ 275,000	$ 275,000

Exit and Termination Costs - Ad

Exit and Termination Costs - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended					9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]
Restructuring Charges	$ 11,789		$ 521,633			$ 9,557	$ 533,525
Severance costs	0		4,191			509	5,638
Workforce Reduction
Restructuring Cost And Reserve [Line Items]
Severance costs			3,700
North Louisiana
Restructuring Cost And Reserve [Line Items]
Accretion expense						36,600
Exit cost						426,600
Restructuring Charges		$ 28,200
Severance costs			2,500
Pennsylvania
Restructuring Cost And Reserve [Line Items]
Exit cost	$ 186		$ 233	$ 10,400		580	$ 10,678
Pennsylvania | Capacity Releases on Transportation Pipelines
Restructuring Cost And Reserve [Line Items]
Exit cost						$ 7,900
Northwest Pennsylvania
Restructuring Cost And Reserve [Line Items]
Severance costs					$ 1,600

Exit and Termination Costs - Su

Exit and Termination Costs - Summary of Exit and Termination Costs (Detail) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]
Severance costs	$ 0	$ 4,191		$ 509	$ 5,638
One-time minimum volume commitment contract payment	0	28,500		0	28,500
Stock-based compensation	0	2,020		0	2,020
Total termination costs	11,789	521,633		9,557	533,525
Pennsylvania
Restructuring Cost And Reserve [Line Items]
Exit cost	186	233	$ 10,400	580	10,678
North Louisiana Contract Release
Restructuring Cost And Reserve [Line Items]
Exit cost	$ 11,603	$ 486,689		$ 8,468	$ 486,689

Exit and Termination Costs - Ex

Exit and Termination Costs - Exit and Termination Costs Included in Accrued Liabilities in Consolidated Balance Sheet - (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Exit costs included in accrued liabilities in consolidated balance sheet
Accrued severance costs		$ 0	$ 4,191	$ 509	$ 5,638
Exit Costs
Exit costs included in accrued liabilities in consolidated balance sheet
Beginning balance	[1]			493,543
Accrued severance costs	[1]			0
Accretion of discount	[1]			37,213
Divestiture contract obligations - changes in estimate	[1]			(28,165)
Payments	[1]			(68,152)
Ending balance	[1]	434,439		434,439
Termination Costs
Exit costs included in accrued liabilities in consolidated balance sheet
Beginning balance				1,454
Accrued severance costs				509
Accretion of discount				0
Divestiture contract obligations - changes in estimate				0
Payments				(1,695)
Ending balance		$ 268		$ 268
[1]	Includes the divestiture contract obligation and the transportation contract capacity release obligation.

Capital Stock - Additional Info

Capital Stock - Additional Information (Detail) - USD ($)	Sep. 30, 2021	Dec. 31, 2020	Oct. 31, 2019
Class Of Stock Disclosures [Abstract]
Authorized capital stock	485,000,000
Common stock, shares authorized	475,000,000	475,000,000
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Stock repurchase program, authorized amount			$ 100,000,000

Capital Stock - Schedule of Cha

Capital Stock - Schedule of Changes in Number of Common Shares Outstanding (Detail) - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Beginning balance	246,348,092	249,630,803
Restricted stock grants	1,293,126	3,390,358
Treasury shares	3,149	(8,197,662)
Ending balance	249,784,358	246,348,092
Restricted Stock
Class Of Stock [Line Items]
Restricted stock units vested	1,485,557	1,226,473
Performance Share
Class Of Stock [Line Items]
Performance stock units issued	640,468	279,420
Performance stock dividends	13,966	18,700

Capital Stock - Schedule of C_2

Capital Stock - Schedule of Change in Treasury Shares (Detail) - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Stockholders Equity Note [Abstract]
Beginning balance	10,005,504	10,005,795
Rabbi trust shares distributed/sold	(2,858)	(3,149)
Shares repurchased	0	0
Ending balance	10,002,646	10,002,646

Supplemental Cash Flow Inform_3

Supplemental Cash Flow Information - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Net cash provided from operating activities included:
Income taxes refunded from taxing authorities	$ 2,661	$ 343
Interest paid	(175,195)	(145,319)
Non-cash investing and financing activities included:
Increase in asset retirement costs capitalized	2,879	4,587	$ 2,610
Increase (decrease) in accrued capital expenditures	$ 11,373	$ (38,942)

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Thousands	Feb. 10, 2021USD ($)
Pennsylvania Department of Environmental Protection (“PDEP”)
Commitments And Contingencies Disclosure [Line Items]
Penalty amount paid	$ 294,000

Suspended Exploratory Well Co_3

Suspended Exploratory Well Costs - Schedule Of Changes In Capitalized Exploratory Well Costs (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2021USD ($)
Capitalized Exploratory Well Costs [Abstract]
Capitalized Exploratory Well Costs, Beginning Balance	$ 7,709
Capitalized Exploratory Well Cost, Additions Pending Determination of Proved Reserves	6,299
Reclassification to Well, Facilities, and Equipment Based on Determination of Proved Reserves	(14,008)
Capitalized Exploratory Well Cost, Charged to Expense	0
Capitalized Exploratory Well Costs, Ending Balance	0
Capitalized Exploratory Well Costs that Have Been Capitalized for Period of One Year or Less	0
Capitalized Exploratory Well Costs that Have Been Capitalized for Period Greater than One Year	$ 0

Costs Incurred for Property A_3

Costs Incurred for Property Acquisition, Exploration and Development (Detail) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Acquisitions:
Acreage purchases	$ 14,014		$ 26,166
Development	298,300		369,093
Gas gathering facilities:
Development	2,846		3,694
Subtotal	337,906		439,317
Asset retirement obligations	2,879	$ 4,587	2,610
Total costs incurred	340,785		441,927
Exploration Expense
Exploration:
Drilling	6,299		7,709
Expense	15,331		31,376
Stock-based compensation expense	$ 1,116		$ 1,279