Range Resources (RRC) 10-Q 28 Apr 16 2016 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2016	Apr. 25, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q1
Trading Symbol	RRC
Entity Registrant Name	RANGE RESOURCES CORP
Entity Central Index Key	315,852
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		169,745,546

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents		$ 529	$ 471
Accounts receivable, less allowance for doubtful accounts of $4,477 and $4,994		104,894	123,842
Derivative assets		261,079	281,544
Inventory and other		25,224	33,217
Total current assets		391,726	439,074
Derivative assets		5,430	7,218
Natural gas and oil properties, successful efforts method	[1]	8,965,379	8,996,336
Accumulated depletion and depreciation	[1]	(2,748,635)	(2,635,031)
Natural gas and oil properties, successful efforts method, net	[1]	6,216,744	6,361,305
Other property and equipment		110,444	110,013
Accumulated depreciation and amortization		(92,572)	(90,558)
Other Property and equipment, net		17,872	19,455
Other assets		73,378	72,979
Total assets		6,705,150	6,900,031
Current liabilities:
Accounts payable		133,853	117,346
Asset retirement obligations		15,071	15,071
Accrued liabilities		160,165	188,028
Accrued interest		28,953	30,139
Derivative liabilities		192	1,136
Total current liabilities		338,234	351,720
Bank debt		23,149	86,427
Senior notes		738,362	738,101
Senior subordinated notes		1,827,554	1,826,775
Deferred tax liabilities		735,971	777,947
Derivative liabilities		1,270	21
Deferred compensation liabilities		115,152	104,792
Asset retirement obligations and other liabilities		254,114	254,590
Total liabilities		$ 4,033,806	4,140,373
Commitments and contingencies			0
Stockholders’ Equity
Preferred stock, $1 par, 10,000,000 shares authorized, none issued and outstanding			0
Common stock, $0.01 par, 475,000,000 shares authorized, 169,746,218 issued at March 31, 2016 and 169,375,743 issued at December 31, 2015		$ 1,698	1,693
Common stock held in treasury, 49,563 shares at March 31, 2016 and 59,283 shares at December 31, 2015		(1,871)	(2,245)
Additional paid-in capital		2,449,035	2,442,623
Retained earnings		222,482	317,587
Total stockholders’ equity		2,671,344	2,759,658
Total liabilities and stockholders’ equity		$ 6,705,150	$ 6,900,031
[1]	Includes capitalized asset retirement costs and the associated accumulated amortization.

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts on accounts receivable	$ 4,477	$ 4,994
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	169,746,218	169,375,743
Common stock held in treasury, shares	49,563	59,283

CONSOLIDATED STATEMENTS OF OPER

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues and other income:
Natural gas, NGLs and oil sales	$ 209,487	$ 325,483
Derivative fair value income	86,908	122,839
Brokered natural gas, marketing and other	35,018	14,485
Total revenues and other income	331,413	462,807
Costs and expenses:
Direct operating	24,054	37,137
Transportation, gathering and compression	125,263	89,426
Production and ad valorem taxes	5,887	9,928
Brokered natural gas and marketing	36,558	21,562
Exploration	4,913	7,886
Abandonment and impairment of unproved properties	10,628	11,491
General and administrative	40,657	48,329
Termination costs	162	5,950
Deferred compensation plan	16,056	(5,624)
Interest	37,739	39,207
Depletion, depreciation and amortization	120,561	147,290
Impairment of proved properties and other assets	43,040	0
Loss on the sale of assets	1,643	175
Total costs and expenses	467,161	412,757
(Loss) income before income taxes	(135,748)	50,050
Income tax (benefit) expense:
Current	0	0
Deferred	(44,038)	22,366
Total income tax expense	(44,038)	22,366
Net (loss) income	$ (91,710)	$ 27,684
Net (loss) income per common share:
Basic	$ (0.55)	$ 0.16
Diluted	(0.55)	0.16
Dividends paid per common share	$ 0.02	$ 0.04
Weighted average common shares outstanding:
Basic	166,803	166,039
Diluted	166,803	166,066

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net (loss) income	$ (91,710)	$ 27,684
Adjustments to reconcile net (loss) income to net cash provided from operating activities:
Deferred income tax (benefit) expense	(44,038)	22,366
Depletion, depreciation and amortization and impairment	163,601	147,290
Exploration dry hole costs	0	103
Abandonment and impairment of unproved properties	10,628	11,491
Derivative fair value income	(86,908)	(122,839)
Cash settlements on derivative financial instruments	109,466	97,490
Allowance for bad debt	200	250
Amortization of deferred financing costs, loss on extinguishment of debt and other	1,707	1,358
Deferred and stock-based compensation	29,128	9,218
Loss on the sale of assets	1,643	175
Changes in working capital:
Accounts receivable	18,752	54,435
Inventory and other	5,333	(1,072)
Accounts payable	11,922	7,098
Accrued liabilities and other	(42,300)	(44,409)
Net cash provided from operating activities	87,424	210,638
Investing activities:
Additions to natural gas and oil properties	(107,015)	(357,780)
Additions to field service assets	(631)	(672)
Acreage purchases	(19,497)	(30,126)
Proceeds from disposal of assets	113,079	10,660
Purchases of marketable securities held by the deferred compensation plan	(8,662)	(4,664)
Proceeds from the sales of marketable securities held by the deferred compensation plan	7,833	4,922
Net cash used in investing activities	(14,893)	(377,660)
Financing activities:
Borrowings on credit facilities	358,000	542,000
Repayments on credit facilities	(422,000)	(353,000)
Debt issuance costs	(124)	(1,700)
Dividends paid	(3,395)	(6,759)
Change in cash overdrafts	(6,368)	(15,341)
Proceeds from the sales of common stock held by the deferred compensation plan	1,414	1,893
Net cash (used in) provided from financing activities	(72,473)	167,093
Increase in cash and cash equivalents	58	71
Cash and cash equivalents at beginning of period	471	448
Cash and cash equivalents at end of period	$ 529	$ 519

Summary of Organization and Nat

Summary of Organization and Nature of Business	3 Months Ended
	Mar. 31, 2016
Industry Specific Policies [Abstract]
Summary of Organization and Nature of Business	(1) SUMMARY OF ORGANIZATION AND NATURE OF BUSINESS Range Resources Corporation (“Range,” “we,” “us,” or “our”) is a Fort Worth, Texas-based independent natural gas, natural gas liquids (“NGLs”) and oil company primarily engaged in the exploration, development and acquisition of natural gas and oil properties in the Appalachian region of the United States. Our objective is to build stockholder value through consistent growth in reserves and production on a cost-efficient basis. 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	3 Months Ended
	Mar. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Basis of Presentation	(2) BASIS OF PRESENTATION These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Range Resources Corporation 2015 Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 25, 2016. The results of operations for the three months ended March 31, 2016 are not necessarily indicative of the results to be expected for the full year. These consolidated financial statements are unaudited but, in the opinion of management, reflect all adjustments necessary for fair presentation of the results for the periods presented. 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 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.

New Accounting Standards

New Accounting Standards	3 Months Ended
	Mar. 31, 2016
New Accounting Pronouncements And Changes In Accounting Principles [Abstract]
New Accounting Standards	(3) NEW ACCOUNTING STANDARDS Not Yet Adopted In May 2014, an accounting standards update was issued that supersedes the existing revenue recognition requirements. This standard includes a five-step revenue recognition model to depict the transfer of goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Among other things, the standard also eliminates industry-specific revenue guidance, requires enhanced disclosures about revenue, provides guidance for transactions that were not previously addressed comprehensively and improves guidance for multiple-element arrangements. This standard is effective for us in first quarter 2018 and will be applied retrospectively to each prior reporting period presented or with the cumulative effect of initially applying the update recognized at the date of initial application. Early adoption is permitted with an effective date no earlier than first quarter 2017. We are evaluating the provisions of this accounting standards update and assessing the impact, if any, it may have on our consolidated results of operations, financial position or cash flows. In August 2014, an accounting standards update was issued that requires management to assess an entity’s ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in United States auditing standards. This standard is effective for us in first quarter 2017 and early adoption is permitted. We do not expect the adoption of this standard to have a significant impact on our consolidated results of operations, financial position or cash flows. In February 2016, an accounting standards update was issued that requires an entity to recognize a right-of-use asset and lease liability for all leases with terms of more than 12 months. Classification of leases as either a finance or operating lease will determine the recognition, measurement and presentation of expenses. This accounting standards update also requires certain quantitative and qualitative disclosures about leasing arrangements. This standard is effective for us in first quarter 2019 and should be applied using a modified retrospective approach for leases that exist or are entered into after the beginning of the earliest comparative period in the financial statements and early adoption is permitted. We are evaluating the provisions of this accounting standards update and assessing the impact it may have, if any, on our consolidated results of operations, financial position or cash flows. In March 2016, an accounting standards update was issued that simplifies several aspects of the accounting for share-based payment award transactions. Among other things, this new guidance will require all income tax effects of share-based awards to be recognized in the statement of operations when the awards vest or are settled, will allow an employer to repurchase more of an employee’s shares for tax withholding purposes than it can today without triggering liability accounting and will allow a policy election to account for forfeitures as they occur. This standard is effective for us in the first quarter of 2017 with prospective application and early adoption is permitted. We are evaluating the provisions of this accounting standards update and assessing the impact it may have, if any, on our consolidated results of operations, financial position or cash flows. Recently Adopted In April 2015, an accounting standards update was issued that requires debt issuance costs to be presented in the balance sheet as a direct reduction from the associated debt liability. This standard was effective for the reporting period beginning on January 1, 2016 with early adoption permitted. As of December 31, 2015, we adopted this standard retrospectively and have accounted for the debt issuance costs as a reduction of the associated debt liability. This adoption only affected our consolidated balance sheets and did not have an impact on our consolidated results of operations or cash flows. In November 2015, an accounting standards update was issued which requires entities to classify all deferred tax assets and liabilities as noncurrent on the balance sheet instead of separating deferred taxes into current and noncurrent amounts. This standard is effective for the reporting period beginning in January 1, 2017 with early adoption permitted. As of December 31, 2015, we adopted this standard retrospectively and reclassified our current deferred tax assets and liabilities into non-current deferred tax assets and liabilities. This adoption only affected our consolidated balance sheets and did not have an impact on our consolidated results of operations or cash flows.

Acquisitions and Dispositions

Acquisitions and Dispositions	3 Months Ended
	Mar. 31, 2016
Business Combinations [Abstract]
Acquisitions and Dispositions	(4) ACQUISITIONS AND DISPOSITIONS We recognized a pretax net loss on the sale of assets of $1.6 million in first quarter 2016 compared to a net loss of $175,000 in the same period of the prior year. 2016 Dispositions Pennsylvania. In first quarter 2016, we sold our non-operated interest in certain wells and gathering facilities in northeast Pennsylvania for proceeds of $111.5 million. After closing adjustments, we recorded a pretax loss of $2.1 million related to this sale. Other. In first quarter 2016, we sold miscellaneous proved and unproved properties, inventory, other assets and surface acreage for proceeds of $1.6 million resulting in a pre-tax gain of $443,000. Included in the $1.6 million of proceeds is $1.2 million received from the sales of proved properties in Mississippi and South Texas. 2015 Dispositions In first quarter 2015, we sold miscellaneous unproved property, proved property and inventory for proceeds of $10.7 million resulting in a pre-tax loss of $175,000. Included in the $10.7 million of proceeds is $10.5 million received from the sale of West Texas properties which closed in February 2015.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	(5) INCOME TAXES Income tax (benefit) expense was as follows (in thousands): Three Months Ended 2016 2015 Income tax (benefit) expense $ (44,038 ) $ 22,366 Effective tax rate 32.4 % 44.7 % We compute our quarterly taxes under the effective tax rate method based on applying an anticipated annual effective rate to our year-to-date income, except for discrete items. Income taxes for discrete items are computed and recorded in the period that the specific transaction occurs. For first quarter ended March 31, 2016 and 2015, our overall effective tax rate was different than the federal statutory rate of 35% due primarily to state income taxes, valuation allowances and other permanent differences. The first quarter 2016 includes tax expense of $4.5 million related to an increase in our valuation allowance for state net operating loss carryforwards that we do not believe are realizable and an income tax benefit of $96,000 to adjust the valuation allowance on our deferred tax asset related to future deferred compensation plan distributions of our senior executives. In addition, we recorded income tax expense of $3.6 million related to equity compensation because we no longer have a hypothetical additional paid-in capital pool (“APIC Pool”) available to offset reduced tax benefits for the excess of financial accounting compensation expense over the corporate income tax deduction. The hypothetical APIC Pool represents the tax benefit of the cumulative excess of corporate income tax deductions over financial accounting compensation expense recognized for equity-based compensation awards which have fully vested. The APIC Pool will increase or decrease each year as equity awards vest. Shortfalls generated by the excess of compensation expense for financial accounting purposes over the corresponding corporate income tax deduction are charged to the APIC Pool rather than income tax expense. Once the APIC Pool is fully depleted, the tax effect of any excess of financial accounting expense over the corresponding corporate income tax deduction is recorded as income tax expense. The first quarter 2015 includes $5.1 million income tax expense related to increases in our valuation allowances for state net operating loss carryforwards and an income tax benefit of $2.0 million adjusting our valuation allowance for our deferred tax asset related to future deferred compensation plan distributions of our senior executives.

(Loss) Income Per Common Share

(Loss) Income Per Common Share	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
(Loss) Income Per Common Share	(6) (LOSS) INCOME 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 tables set 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 2016 2015 Net (loss) income, as reported $ (91,710 ) $ 27,684 Participating earnings (a) (56 ) (463 ) Basic net (loss) income attributed to common shareholders (91,766 ) 27,221 Reallocation of participating earnings (a) ¾ ¾ Diluted net (loss) income attributed to common shareholders $ (91,766 ) $ 27,221 Net (loss) income per common share: Basic $ (0.55 ) $ 0.16 Diluted $ (0.55 ) $ 0.16 (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 table provides a reconciliation of basic weighted average common shares outstanding to diluted weighted average common shares outstanding (in thousands): Three Months Ended 2016 2015 Weighted average common shares outstanding – basic 166,803 166,039 Effect of dilutive securities: Director and employee SARs ¾ 27 Weighted average common shares outstanding – diluted 166,803 166,066 Weighted average common shares outstanding-basic for both the three months ended March 31, 2016 and the three months ended March 31, 2015 excludes 2.8 million shares of restricted stock held in our deferred compensation plan (although all awards are issued and outstanding upon grant). Due to our net loss from operations for the three months ended March 31, 2016, we excluded all outstanding stock appreciation rights (“SARs”) and restricted stock from the computation of diluted net loss per share because the effect would have been anti-dilutive to the computations. For the three months ended March 31, 2015, 1.4 million SARs were outstanding but not included in the computations of diluted income from operations per share because the grant prices of the SARs were greater than the average market price of the common stock.

Suspended Exploratory Well Cost

Suspended Exploratory Well Costs	3 Months Ended
	Mar. 31, 2016
Extractive Industries [Abstract]
Suspended Exploratory Well Costs	(7) 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 included 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. We did not have any exploratory well costs that have been capitalized for a period greater than one year as of March 31, 2016. The following table reflects the change in capitalized exploratory well costs for the three months ended March 31, 2016 and the year ended December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Balance at beginning of period $ 4,161 $ 2,996 Additions to capitalized exploratory well costs pending the determination of proved reserves 1,214 1,165 Reclassifications to wells, facilities and equipment based on determination of proved reserves (5,375 ) ¾ Capitalized exploratory well costs charged to expense ¾ ¾ Balance at end of period ¾ 4,161 Less exploratory well costs that have been capitalized for a period of one year or less ¾ (1,165 ) Capitalized exploratory well costs that have been capitalized for a period greater than one year $ ¾ $ 2,996 Number of projects that have exploratory well costs that have been capitalized greater than one year ¾ 1

Indebtedness

Indebtedness	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Indebtedness	(8) INDEBTEDNESS We had the following debt outstanding as of the dates shown below which are net of debt issuance costs (bank debt interest rate at March 31, 2016 is shown parenthetically) (in thousands). No interest was capitalized during the three months ended March 31, 2016 or the year ended December 31, 2015. March 31, December 31, 2016 2015 Bank debt (2.4%), net of unamortized debt issuance costs of $7,851 and $8,573 $ 23,149 $ 86,427 Senior notes: 4.875% senior notes due 2025, net of unamortized debt issuance costs of $11,638 and $11,899 738,362 738,101 Senior subordinated notes: 5.75% senior subordinated notes due 2021, net of unamortized debt issuance costs of $5,671 and $5,905 494,329 494,095 5.00% senior subordinated notes due 2022, net of unamortized debt issuance costs of $7,508 and $7,777 592,492 592,223 5.00% senior subordinated notes due 2023, net of unamortized debt issuance costs of $9,267 and $9,543 740,733 740,457 Total debt $ 2,589,065 $ 2,651,303 Bank Debt In October 2014, 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 October 16, 2019. The bank credit facility provides for a maximum facility amount of $4.0 billion. The bank credit facility provides for a borrowing base subject to redeterminations annually by May and for event-driven unscheduled redeterminations. As part of our annual redetermination completed on March 17, 2016, our borrowing base was reaffirmed at $3.0 billion and our bank commitment was also reaffirmed at $2.0 billion. As of March 31, 2016, our bank group was composed of twenty-nine financial institutions with no one bank holding more than 5.8% of the total facility. 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. As of March 31, 2016, the outstanding balance under our bank credit facility was $31.0 million, before deducting debt issuance costs. Additionally, we had $230.8 million of undrawn letters of credit leaving $1.7 billion of committed borrowing capacity available under the facility. During a non-investment grade period, borrowings under the bank credit facility can either be at the alternate base rate (“ABR,” as defined in the bank credit agreement) plus a spread ranging from 0.25% to 1.25% or LIBOR borrowings at the LIBOR Rate (as defined in the bank credit 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 2.1% for the three months ended March 31, 2016 compared to 1.8% for the three months ended March 31, 2015. A commitment fee is paid on the undrawn balance based on an annual rate of 0.30% to 0.375%. At March 31, 2016, the commitment fee was 0.30% and the interest rate margin was 1.25% on our LIBOR loans and 0.25% on our base rate loans. At any time during which we have an investment grade debt rating from Moody’s Investors Service, Inc. or Standard & Poor’s Ratings Services and we have elected, at our discretion, to effect the investment grade rating period, certain collateral security requirements, including the borrowing base requirement and restrictive covenants, will cease to apply and an additional financial covenant (as defined in the bank credit facility) will be imposed. During the investment grade period, borrowings under the credit facility can either be at the ABR plus a spread ranging from 0.125% to 0.75% or at the LIBOR Rate plus a spread ranging from 1.125% to 1.75% depending on our debt rating. The commitment fee paid on the undrawn balance would range from 0.15% to 0.30%. We currently do not have an investment grade debt rating. Senior Notes In May 2015, we issued $750.0 million aggregate principal amount of 4.875% senior notes due 2025 (the “Outstanding Notes”) for net proceeds of $737.4 million after underwriting discounts and commissions of $12.6 million. The notes were issued at par and were offered to qualified institutional buyers and non-U.S. persons outside the United States in compliance with Rule 144A and Regulation S under the Securities Act of 1933, as amended (the “Securities Act”). On April 8, 2016, all of the Outstanding Notes were exchanged for an equal principal amount of registered 4.875% senior notes due 2025 pursuant to an effective registration statement on Form S-4 filed with the SEC on February 29, 2016 under the Securities Act (the “Exchange Notes”). The Exchange Notes are identical to the Outstanding Notes except the Exchange Notes are registered under the Securities Act and do not have restrictions on transfer, registration rights or provisions for additional interest. Under certain circumstances, if we experience a change of control, noteholders may require us to repurchase all of our senior notes at 101% of the aggregate principal amount plus accrued and unpaid interest. Senior Subordinated Notes If we experience a change of control, noteholders may require us to repurchase all or a portion of our senior subordinated notes at 101% of the aggregate principal amount plus accrued and unpaid interest, if any. All of the senior subordinated notes and the guarantees by our subsidiary guarantors are general, unsecured obligations and are subordinated to our bank debt and will be subordinated to existing and future senior debt that we or our subsidiary guarantors are permitted to incur under the bank credit facility and the indentures governing the subordinated notes. 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, senior subordinated notes and our bank credit facility are full and unconditional and joint and several, subject to certain customary release provisions. 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 credit agreement) to cash interest expense of equal to or greater than 2.5 and a current ratio (as defined in the credit agreement) of no less than 1.0. In addition, the ratio of the present value of proved reserves (as defined in the credit 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 March 31, 2016. The indentures governing our senior subordinated notes contain various restrictive covenants that are substantially identical to each other and may limit our ability to, among other things, pay cash dividends, incur additional indebtedness, sell assets, enter into transactions with affiliates, or change the nature of our business. At March 31, 2016, we were in compliance with these covenants. Our senior subordinated notes also include a limitation on the amount of credit facility debt we can incur. Certain thresholds, as set forth in the indenture debt incurrence test, may limit our ability to incur debt under our bank credit facility in excess of a $1.5 billion floor amount based on levels of commodity prices of natural gas, NGLs and crude oil used in the annual calculation of discounted future cash flows relating to proved oil and gas reserves (as further defined in the indenture). Based on the year-end 2015 discounted future net cash flows, our bank credit facility usage is limited to $1.5 billion until higher prices or proved reserve additions increase discounted future net cash flows.

Asset Retirement Obligations

Asset Retirement Obligations	3 Months Ended
	Mar. 31, 2016
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	(9) 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 three months ended March 31, 2016 is as follows (in thousands): Three Months 2016 Beginning of period $ 264,137 Liabilities incurred 194 Liabilities settled (3,201 ) Disposition of wells (2,164 ) Accretion expense 3,978 Change in estimate 821 End of period 263,765 Less current portion (15,071 ) Long-term asset retirement obligations $ 248,694 Accretion expense is recognized as a component of depreciation, depletion and amortization expense in the accompanying consolidated statements of operations.

Capital Stock

Capital Stock	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Capital Stock	(10) 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 2015: Three Months Year Beginning balance 169,316,460 168,628,177 SARs exercised — 77,002 Restricted stock grants 132,237 335,103 Restricted stock units vested 238,238 252,507 Treasury shares issued 9,720 23,671 Ending balance 169,696,655 169,316,460

Derivative Activities

Derivative Activities	3 Months Ended
	Mar. 31, 2016
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 do not utilize complex derivatives, as we typically utilize commodity swaps or collars 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 asset of $262.0 million at March 31, 2016. These contracts expire monthly through December 2018. The following table sets forth our commodity-based derivative volumes by year as of March 31, 2016, excluding our basis and freight swaps which are discussed separately below: Period Contract Type Volume Hedged Weighted Natural Gas 2016 Swaps 760,000 Mmbtu/day $ 3.22 2017 Swaps 155,000 Mmbtu/day $ 2.82 2018 Swaps 27,500 Mmbtu/day $ 2.84 Crude Oil 2016 Swaps 5,498 bbls/day $ 59.74 2017 Swaps 1,000 bbls/day $ 50.13 NGLs (C3-Propane) 2016 Swaps 5,500 bbls/day $ 0.60/gallon NGLs (NC4-Normal Butane) 2016 Swaps 3,750 bbls/day $ 0.66/gallon NGLs (C5-Natural Gasoline) 2016 Swaps 3,417 bbls/day $ 1.12/gallon 2017 Swaps 750 bbls/day $ 0.91/gallon Every derivative instrument is required to be recorded on the balance sheet as either an asset or a liability measured at its fair value. If the derivative does not qualify as a hedge or is not designated as a hedge, changes in fair value of these non-hedge derivatives are recognized in earnings as derivative fair value income or loss. Basis Swap Contracts In addition to the collars and swaps above, at March 31, 2016, we had natural gas basis swap contracts which lock in the differential between NYMEX and certain of our physical pricing indices primarily in Appalachia. These contracts settle monthly through March 2017 and include a total volume of 52,360,000 Mmbtu. The fair value of these contracts was a gain of $640,000 on March 31, 2016. At March 31, 2016, we also had propane spread swap contracts which lock in the differential between Mont Belvieu and international propane indices. The contracts settle monthly through December 2017 and include a total volume of 1,675,000 barrels in 2016 and 750,000 barrels in 2017. The fair value of these contracts was a gain of $2.5 million on March 31, 2016. Freight Swap Contracts In connection with our international propane spread swaps, at March 31, 2016, we had freight swap contracts which lock in the freight rate for a specific trade route on the Baltic Exchange. These contracts settle monthly in fourth quarter 2016. These contracts cover 5,000 metric tons per month and have a fair value of a loss of $11,000 on March 31, 2016. These contracts use observable third-party pricing inputs that we consider to be a level 2 fair value classification. Derivative Assets and Liabilities The combined fair value of derivatives included in the accompanying consolidated balance sheets as of March 31, 2016 and December 31, 2015 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): March 31, 2016 Gross Amounts of Recognized Assets Gross Amounts Offset in the Balance Sheet Net Amounts of Assets Presented in the Balance Sheet Derivative assets: Natural gas –swaps $ 214,389 $ (1,943 ) $ 212,446 –basis swaps 3,327 (2,648 ) 679 Crude oil –swaps 29,273 (183 ) 29,090 NGLs –C3 propane swaps 8,380 ¾ 8,380 –C3 propane spread swaps 7,373 (4,916 ) 2,457 –NC4 butane swaps 4,972 (199 ) 4,773 –C5 natural gasoline swaps 9,457 (762 ) 8,695 Freight –swaps ¾ (11 ) (11 ) $ 277,171 $ (10,662 ) $ 266,509 March 31, 2016 Gross Amount of Recognized (Liabilities) Gross Amounts Net Amounts of (Liabilities) Presented in the Balance Sheet Derivative (liabilities): Natural gas –swaps $ (3,399 ) $ 1,943 $ (1,456 ) –basis swaps (2,686 ) 2,648 (38 ) Crude oil –swaps (81 ) 183 102 NGLs –C3 propane spread swaps (4,916 ) 4,916 ¾ –NC4 butane swaps (199 ) 199 ¾ –C5 natural gasoline swaps (832 ) 762 (70 ) Freight –swaps (11 ) 11 ¾ $ (12,124 ) $ 10,662 $ (1,462 ) December 31, 2015 Gross Amounts of Gross Amounts Net Amounts of Derivative assets: Natural gas –swaps $ 219,357 $ (10,245 ) $ 209,112 –basis swaps 8,251 (2,765 ) 5,486 Crude oil –swaps 38,699 ¾ 38,699 NGLs –C3 propane swaps 15,884 ¾ 15,884 –C3 propane spread swaps 2,497 (2,497 ) ¾ –NC4 butane swaps 6,968 ¾ 6,968 –C5 natural gasoline swaps 12,694 (81 ) 12,613 $ 304,350 $ (15,588 ) $ 288,762 December 31, 2015 Gross Amounts of Gross Amounts Net Amounts of Derivative (liabilities): Natural gas –swaps $ (10,245 ) $ 10,245 $ ¾ –basis swaps (2,786 ) 2,765 (21 ) NGLs –C3 propane spread swap (3,633 ) 2,497 (1,136 ) –C5 natural gasoline swaps (81 ) 81 ¾ $ (16,745 ) $ 15,588 $ (1,157 ) The effects of our non-hedge derivatives (those derivatives that do not qualify for hedge accounting) on our consolidated statements of operations are summarized below (in thousands): Three Months Ended March 31, Derivative Fair Value Income (Loss) 2016 2015 Commodity swaps $ 79,644 $ 125,777 Collars ¾ 8,415 Basis swaps 7,275 (11,353 ) Freight swaps (11 ) ¾ Total $ 86,908 $ 122,839

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2016
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 do 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 that are not corroborated by market data and may be used with internally developed methodologies that result in management’s best estimate of 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. 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 table for assets and liabilities measured at fair value, on a recurring basis (in thousands): Fair Value Measurements at March 31, 2016 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation plans $ 63,018 $ — $ — $ 63,018 Derivatives – — 261,961 — 261,961 –basis swaps — 3,097 — 3,097 –freight swaps — (11 ) — (11 ) Fair Value Measurements at December 31, 2015 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation plans $ 62,376 $ — $ — $ 62,376 Derivatives – — 283,276 — 283,276 –basis swaps — 4,329 — 4,329 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. 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 first quarter 2016, interest and dividends were $136,000 and the mark-to-market adjustment was a gain of $259,000 compared to interest and dividends of $109,000 and a mark-to-market gain of $1.4 million in first quarter 2015. Fair Values—Non-recurring 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 the three months ended March 31, 2016, due to declines in commodity prices, there were indicators that the carrying value of certain of our oil and gas properties may be impaired and undiscounted future cash flows attributed to these assets indicated their carrying amounts were not expected to be recovered. Their remaining fair value was measured using an income approach based upon internal estimates of future production levels, prices, drilling and operating costs and discount rates, which are Level 3 measurements. We also considered the potential sale of certain of these properties. We recorded non-cash charges during the three months ended March 31, 2016 of $43.0 million related to our natural gas and oil properties in Western Oklahoma. Our estimates of future cash flows attributable to our natural gas and oil properties could decline further with commodity prices which may result in additional impairment charges. The following table presents the value of these assets measured at fair value on a non-recurring basis at the time impairment was recorded (in thousands): Three Months Ended March 31, 2016 2015 Fair Value Impairment Fair Value Value Impairment Natural gas and oil properties $ 90,150 $ 43,040 $ ¾ $ ¾ Fair Values—Reported The following table presents the carrying amounts and the fair values of our financial instruments as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Carrying Fair Carrying Fair Assets: Commodity swaps and basis swaps $ 266,509 $ 266,509 $ 288,762 $ 288,762 Marketable securities (a) 63,018 63,018 62,376 62,376 (Liabilities): Commodity swaps and basis swaps (1,462 ) (1,462 ) (1,157 ) (1,157 ) Bank credit facility (b) (31,000 ) (31,000 ) (95,000 ) (95,000 ) Deferred compensation plan (c) (139,279 ) (139,279 ) (122,918 ) (122,918 ) 4.875% senior notes due 2025 (b) (750,000 ) (651,563 ) (750,000 ) (572,813 ) 5.75% senior subordinated notes due 2021 (b) (500,000 ) (441,250 ) (500,000 ) (396,250 ) 5.00% senior subordinated notes due 2022 (b) (600,000 ) (515,250 ) (600,000 ) (447,000 ) 5.00% senior subordinated notes due 2023 (b) (750,000 ) (635,625 ) (750,000 ) (551,250 ) (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 at the closing price on the balance sheet date which is a Level 1 input. Our current assets and liabilities contain 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. For additional information, see Note 9. Concentrations of Credit Risk As of March 31, 2016, 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 security are obtained as deemed necessary to limit our risk of loss. Our allowance for uncollectable receivables was $4.5 million at March 31, 2016 and $5.0 million at December 31, 2015. As of March 31, 2016, our derivative contracts consist of swaps. 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 March 31, 2016, our derivative counterparties include nineteen financial institutions, of which all but four are secured lenders in our bank credit facility. At March 31, 2016, our net derivative assets include a net receivable from these four counterparties that are not included in our bank credit facility of $9.5

Stock-Based Compensation Plans

Stock-Based Compensation Plans	3 Months Ended
	Mar. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation Plans	(13) STOCK-BASED COMPENSATION PLANS Stock-Based Awards In 2005, we began granting SARs which represent the right to receive a payment equal to the excess of the fair market value of shares of our common stock on the date the right is exercised over the value of the stock on the date of grant. All SARs granted under our Amended and Restated 2005 Equity-Based Incentive Compensation Plan (the “2005 Plan”) will be settled in shares of stock, vest over a three-year period and have a maximum term of five years from the date they are granted. In 2011, the Compensation Committee of the Board of Directors began granting restricted stock units under our equity-based stock compensation plans. These restricted stock units, which we refer to as restricted stock Equity Awards, vest over a three-year period. All awards granted have been issued at prevailing market prices at the time of grant and the vesting of these shares is based upon an employee’s continued employment with us. In first quarter 2014, the Compensation Committee began granting performance share unit (“PSU”) awards under our 2005 Plan. The number of shares to be issued is determined by our total shareholder return compared to the total shareholder return of a predetermined group of peer companies over the performance period. The grant date fair value of the PSU awards is determined using a Monte Carlo simulation and is recognized as stock-based compensation expense over the three-year performance period. The actual payout of shares granted depends on our total shareholder return compared to our peer companies and will be between zero and 150%. The Compensation Committee also grants restricted stock to certain employees and non-employee directors of the Board of Directors as part of their compensation. Upon grant of these restricted shares, which we refer to as restricted stock Liability Awards, the shares generally are placed in our deferred compensation plan and, upon vesting, employees are allowed to take withdrawals either in cash or in stock based on their distribution elections. Compensation expense is recognized over the vesting period, which is typically three years for employee grants and immediate vesting for non-employee directors. All restricted stock awards are issued at prevailing market prices at the time of the grant and vesting is based upon an employee’s continued employment with us. Prior to vesting, all restricted stock awards have the right to vote such shares and receive dividends thereon. These Liability Awards are classified as a liability and are remeasured at fair value each reporting period. This mark-to-market adjustment is reported as deferred compensation plan expense in the accompanying consolidated statements of operations. Total Stock-Based Compensation Expense Stock-based compensation represents amortization of restricted stock, PSUs and SARs expense. 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 table details the allocation of stock-based compensation to functional expense categories (in thousands): Three Months Ended 2016 2015 Direct operating expense $ 588 $ 886 Brokered natural gas and marketing expense 516 506 Exploration expense 690 732 General and administrative expense 11,113 11,080 Termination costs ¾ 1,287 Total stock-based compensation $ 12,907 $ 14,491 Performance Share Unit Awards The following is a summary of our non-vested PSU awards outstanding at March 31, 2016: Units Weighted Outstanding at December 31, 2015 262,124 $ 64.77 Units granted (a) 118,193 30.47 Units vested (42,546 ) 60.75 Units forfeited ¾ ¾ Outstanding at March 31, 2016 337,771 $ 53.28 (a) The following assumptions were used to estimate the fair value of PSUs granted during first quarter 2016: Three Months Ended March 31, 2016 2015 Risk-free interest rate 0.85 % 1.05 % Expected annual volatility 51.7 % 33.9 % Weighted average grant date fair value per unit $ 30.47 $ 55.17 We recorded PSU compensation expense of $2.5 million in first quarter 2016 compared to $1.3 million in the same period of 2015. Restricted Stock Awards Equity Awards In first quarter 2016, we granted 927,000 restricted stock Equity Awards to employees at an average grant price of $28.04 compared to 548,000 restricted stock Equity Awards granted to employees at an average grant price of $52.25 in first quarter 2015. These awards generally vest over a three-year period. We recorded compensation expense for these Equity Awards of $5.8 million in first quarter 2016 compared to $7.8 million in the same period of 2015. Equity Awards are not issued to employees until they are vested. Employees do not have the option to receive cash. Liability Awards In first quarter 2016, we granted 136,000 shares of restricted stock Liability Awards as compensation to employees at an average price of $28.40 with vesting generally over a three-year period. In first quarter 2015, we granted 95,000 shares of Liability Awards as compensation to employees at an average price of $52.25 with vesting generally over a three-year period. We recorded compensation expense for Liability Awards of $3.7 million in the first quarter 2016 compared to $3.9 million in the same period of 2015. Substantially all of these awards are held in our deferred compensation plan, are classified as a liability and are remeasured at fair value at the end of each reporting period. This mark-to-market adjustment 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 March 31, 2016: Equity Awards Liability Awards Shares Weighted Shares Weighted Outstanding at December 31, 2015 436,764 $ 59.74 308,737 $ 65.80 Granted 927,266 28.04 136,275 28.40 Vested (135,715 ) 49.30 (69,683 ) 65.22 Forfeited (30,281 ) 50.73 (4,038 ) 52.45 Outstanding at March 31, 2016 1,198,034 $ 36.61 371,291 $ 52.32 Stock Appreciation Right Awards We have one active equity-based stock plan which we refer to as the 2005 Plan. Under this plan, incentive and non-qualified stock options, SARs, and various other awards may be issued to non-employee directors and employees pursuant to decisions of the Compensation Committee, which is comprised of only non-employee, independent directors. There were 1.4 million SARs outstanding at March 31, 2016. Information with respect to SARs activity is summarized below: Shares Weighted Outstanding at December 31, 2015 1,510,977 $ 63.73 Exercised ¾ — Expired/forfeited (102,661 ) 49.18 Outstanding at March 31, 2016 1,408,316 $ 64.79 Deferred Compensation Plan Our deferred compensation plan gives non-employee directors and officers the ability to defer all or a portion of their salaries and bonuses and invest in Range common stock or make other investments at the individual’s discretion. Range provides a partial matching contribution which vests over three years. 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. Due to an increase in the Range stock price since December 31, 2015, we recorded a mark-to-market loss of $16.1 million in first quarter 2016 compared to a gain of $5.6 million in first quarter 2015. The Rabbi Trust held 2.8 million shares (2.4 million of which were vested) of Range stock at March 31, 2016 compared to 2.8 million shares (2.5 million of which were vested) at December 31, 2015.

Supplemental Cash Flow Informat

Supplemental Cash Flow Information	3 Months Ended
	Mar. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	(14) SUPPLEMENTAL CASH FLOW INFORMATION Three Months Ended 2016 2015 (in thousands) Net cash provided from operating activities included: Income taxes refunded from taxing authorities $ 73 $ — Interest paid (37,117 ) (54,284 ) Non-cash investing and financing activities included: Increase in asset retirement costs capitalized 1,015 15,813 Increase (decrease) in accrued capital expenditures 9,719 (110,622 )

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	(15) COMMITMENTS AND CONTINGENCIES Litigation We are the subject of, or party to, a number of pending or threatened legal actions, administrative proceedings and claims arising in the ordinary course of our business. 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. We estimate and provide for potential losses that may arise out of litigation and regulatory proceedings to the extent that such losses are probable and can be reasonably estimated. We will continue to evaluate our litigation and regulatory proceedings quarterly and will establish and adjust any estimated liability as appropriate to reflect our assessment of the then current status of litigation and regulatory proceedings. Significant judgment is required in making these estimates and our final liabilities may ultimately be materially different. Transportation and Gathering Contracts In first quarter 2016, our transportation and gathering commitments increased by approximately $12.7 million over the next nine years primarily from new firm transportation contracts and price changes to current contracts. Delivery Commitments In first quarter 2016, we entered into new agreements with several pipeline companies and end users to deliver natural gas volumes from our production. The new agreements are to deliver from 1,500 to 15,000 Mmbtu per day of natural gas and the commitments are between one and five years and began as early as April 1, 2016.

Office Closing and Termination

Office Closing and Termination Costs	3 Months Ended
	Mar. 31, 2016
Restructuring And Related Activities [Abstract]
Office Closing and Termination Costs	(16) OFFICE CLOSING AND TERMINATION COSTS In first quarter 2015, we announced the closing of our Oklahoma City administrative and operational office to reduce our general and administrative expenses, due in part to the impact of lower commodity prices on our operations. In fourth quarter 2014, we initially accrued an estimated $8.4 million of termination costs relating to the closure of this office as it was probable of occurring. In early 2015, those plans and personnel involved were finalized which resulted in additional accruals in 2015 for severance and other personnel costs of $275,000, additional accelerated vesting of stock-based compensation of $608,000 and $3.2 million of building lease costs. The following summarizes our termination costs for the three months ended March 31, 2016 and 2015 (in thousands): Three Months Ended March 31, 2016 2015 Termination costs $ – $ 1,431 Building lease 162 3,232 Stock-based compensation – 1,287 $ 162 $ 5,950 The following details our accrued liability as of March 31, 2016 (in thousands): March 31, 2016 Beginning balance $ 11,630 Accrued building rent 162 Payments (5,405 ) Ending balance $ 6,387

Capitalized Costs and Accumulat

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	3 Months Ended
	Mar. 31, 2016
Extractive Industries [Abstract]
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	(17) Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (a) March 31, December 31, (in thousands) Natural gas and oil properties: Properties subject to depletion $ 8,030,190 $ 8,047,181 Unproved properties 935,189 949,155 Total 8,965,379 8,996,336 Accumulated depreciation, depletion and amortization (2,748,635 ) (2,635,031 ) Net capitalized costs $ 6,216,744 $ 6,361,305 (a) Includes capitalized asset retirement costs and the associated accumulated amortization.

Costs Incurred for Property Acq

Costs Incurred for Property Acquisition, Exploration and Development	3 Months Ended
	Mar. 31, 2016
Extractive Industries [Abstract]
Costs Incurred for Property Acquisition, Exploration and Development	(18) Costs Incurred for Property Acquisition, Exploration and Development (a) Three Months 2016 Year Ended (in thousands) Acreage purchases $ 5,341 $ 73,025 Development 120,903 708,268 Exploration: Drilling 9,097 87,505 Expense 4,223 18,421 Stock-based compensation expense 690 2,985 Gas gathering facilities: Development 848 13,337 Subtotal 141,102 903,541 Asset retirement obligations 1,015 22,184 Total costs incurred $ 142,117 $ 925,725 (a) Includes costs incurred whether capitalized or expensed.

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Mar. 31, 2016
Income Tax Disclosure [Abstract]
Income Tax (Benefit) Expense	Income tax (benefit) expense was as follows (in thousands): Three Months Ended 2016 2015 Income tax (benefit) expense $ (44,038 ) $ 22,366 Effective tax rate 32.4 % 44.7 %

(Loss) Income Per Common Share

(Loss) Income Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2016
Earnings Per Share [Abstract]
Computations of Basic and Diluted (Loss) Income 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 tables set 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 2016 2015 Net (loss) income, as reported $ (91,710 ) $ 27,684 Participating earnings (a) (56 ) (463 ) Basic net (loss) income attributed to common shareholders (91,766 ) 27,221 Reallocation of participating earnings (a) ¾ ¾ Diluted net (loss) income attributed to common shareholders $ (91,766 ) $ 27,221 Net (loss) income per common share: Basic $ (0.55 ) $ 0.16 Diluted $ (0.55 ) $ 0.16 (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 to Diluted Weighted Average Common Shares Outstanding	The following table provides a reconciliation of basic weighted average common shares outstanding to diluted weighted average common shares outstanding (in thousands): Three Months Ended 2016 2015 Weighted average common shares outstanding – basic 166,803 166,039 Effect of dilutive securities: Director and employee SARs ¾ 27 Weighted average common shares outstanding – diluted 166,803 166,066

Suspended Exploratory Well Co26

Suspended Exploratory Well Costs (Tables)	3 Months Ended
	Mar. 31, 2016
Extractive Industries [Abstract]
Suspended Exploratory Well Costs	The following table reflects the change in capitalized exploratory well costs for the three months ended March 31, 2016 and the year ended December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Balance at beginning of period $ 4,161 $ 2,996 Additions to capitalized exploratory well costs pending the determination of proved reserves 1,214 1,165 Reclassifications to wells, facilities and equipment based on determination of proved reserves (5,375 ) ¾ Capitalized exploratory well costs charged to expense ¾ ¾ Balance at end of period ¾ 4,161 Less exploratory well costs that have been capitalized for a period of one year or less ¾ (1,165 ) Capitalized exploratory well costs that have been capitalized for a period greater than one year $ ¾ $ 2,996 Number of projects that have exploratory well costs that have been capitalized greater than one year ¾ 1

Indebtedness (Tables)

Indebtedness (Tables)	3 Months Ended
	Mar. 31, 2016
Debt Disclosure [Abstract]
Debt Outstanding	We had the following debt outstanding as of the dates shown below which are net of debt issuance costs (bank debt interest rate at March 31, 2016 is shown parenthetically) (in thousands). No interest was capitalized during the three months ended March 31, 2016 or the year ended December 31, 2015. March 31, December 31, 2016 2015 Bank debt (2.4%), net of unamortized debt issuance costs of $7,851 and $8,573 $ 23,149 $ 86,427 Senior notes: 4.875% senior notes due 2025, net of unamortized debt issuance costs of $11,638 and $11,899 738,362 738,101 Senior subordinated notes: 5.75% senior subordinated notes due 2021, net of unamortized debt issuance costs of $5,671 and $5,905 494,329 494,095 5.00% senior subordinated notes due 2022, net of unamortized debt issuance costs of $7,508 and $7,777 592,492 592,223 5.00% senior subordinated notes due 2023, net of unamortized debt issuance costs of $9,267 and $9,543 740,733 740,457 Total debt $ 2,589,065 $ 2,651,303

Asset Retirement Obligations (T

Asset Retirement Obligations (Tables)	3 Months Ended
	Mar. 31, 2016
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligation	A reconciliation of our liability for plugging and abandonment costs for the three months ended March 31, 2016 is as follows (in thousands): Three Months 2016 Beginning of period $ 264,137 Liabilities incurred 194 Liabilities settled (3,201 ) Disposition of wells (2,164 ) Accretion expense 3,978 Change in estimate 821 End of period 263,765 Less current portion (15,071 ) Long-term asset retirement obligations $ 248,694

Capital Stock (Tables)

Capital Stock (Tables)	3 Months Ended
	Mar. 31, 2016
Equity [Abstract]
Capital Stock	The following is a schedule of changes in the number of common shares outstanding since the beginning of 2015: Three Months Year Beginning balance 169,316,460 168,628,177 SARs exercised — 77,002 Restricted stock grants 132,237 335,103 Restricted stock units vested 238,238 252,507 Treasury shares issued 9,720 23,671 Ending balance 169,696,655 169,316,460

Derivative Activities (Tables)

Derivative Activities (Tables)	3 Months Ended
	Mar. 31, 2016
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 March 31, 2016, excluding our basis and freight swaps which are discussed separately below: Period Contract Type Volume Hedged Weighted Natural Gas 2016 Swaps 760,000 Mmbtu/day $ 3.22 2017 Swaps 155,000 Mmbtu/day $ 2.82 2018 Swaps 27,500 Mmbtu/day $ 2.84 Crude Oil 2016 Swaps 5,498 bbls/day $ 59.74 2017 Swaps 1,000 bbls/day $ 50.13 NGLs (C3-Propane) 2016 Swaps 5,500 bbls/day $ 0.60/gallon NGLs (NC4-Normal Butane) 2016 Swaps 3,750 bbls/day $ 0.66/gallon NGLs (C5-Natural Gasoline) 2016 Swaps 3,417 bbls/day $ 1.12/gallon 2017 Swaps 750 bbls/day $ 0.91/gallon
Combined Fair Value of Derivatives, by Consolidated Balance Sheets	The combined fair value of derivatives included in the accompanying consolidated balance sheets as of March 31, 2016 and December 31, 2015 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): March 31, 2016 Gross Amounts of Recognized Assets Gross Amounts Offset in the Balance Sheet Net Amounts of Assets Presented in the Balance Sheet Derivative assets: Natural gas –swaps $ 214,389 $ (1,943 ) $ 212,446 –basis swaps 3,327 (2,648 ) 679 Crude oil –swaps 29,273 (183 ) 29,090 NGLs –C3 propane swaps 8,380 ¾ 8,380 –C3 propane spread swaps 7,373 (4,916 ) 2,457 –NC4 butane swaps 4,972 (199 ) 4,773 –C5 natural gasoline swaps 9,457 (762 ) 8,695 Freight –swaps ¾ (11 ) (11 ) $ 277,171 $ (10,662 ) $ 266,509 March 31, 2016 Gross Amount of Recognized (Liabilities) Gross Amounts Net Amounts of (Liabilities) Presented in the Balance Sheet Derivative (liabilities): Natural gas –swaps $ (3,399 ) $ 1,943 $ (1,456 ) –basis swaps (2,686 ) 2,648 (38 ) Crude oil –swaps (81 ) 183 102 NGLs –C3 propane spread swaps (4,916 ) 4,916 ¾ –NC4 butane swaps (199 ) 199 ¾ –C5 natural gasoline swaps (832 ) 762 (70 ) Freight –swaps (11 ) 11 ¾ $ (12,124 ) $ 10,662 $ (1,462 ) December 31, 2015 Gross Amounts of Gross Amounts Net Amounts of Derivative assets: Natural gas –swaps $ 219,357 $ (10,245 ) $ 209,112 –basis swaps 8,251 (2,765 ) 5,486 Crude oil –swaps 38,699 ¾ 38,699 NGLs –C3 propane swaps 15,884 ¾ 15,884 –C3 propane spread swaps 2,497 (2,497 ) ¾ –NC4 butane swaps 6,968 ¾ 6,968 –C5 natural gasoline swaps 12,694 (81 ) 12,613 $ 304,350 $ (15,588 ) $ 288,762 December 31, 2015 Gross Amounts of Gross Amounts Net Amounts of Derivative (liabilities): Natural gas –swaps $ (10,245 ) $ 10,245 $ ¾ –basis swaps (2,786 ) 2,765 (21 ) NGLs –C3 propane spread swap (3,633 ) 2,497 (1,136 ) –C5 natural gasoline swaps (81 ) 81 ¾ $ (16,745 ) $ 15,588 $ (1,157 )
Effects of Non-Hedge Derivatives on Consolidated Statements of Operations	The effects of our non-hedge derivatives (those derivatives that do not qualify for hedge accounting) on our consolidated statements of operations are summarized below (in thousands): Three Months Ended March 31, Derivative Fair Value Income (Loss) 2016 2015 Commodity swaps $ 79,644 $ 125,777 Collars ¾ 8,415 Basis swaps 7,275 (11,353 ) Freight swaps (11 ) ¾ Total $ 86,908 $ 122,839

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value	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 table for assets and liabilities measured at fair value, on a recurring basis (in thousands): Fair Value Measurements at March 31, 2016 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation plans $ 63,018 $ — $ — $ 63,018 Derivatives – — 261,961 — 261,961 –basis swaps — 3,097 — 3,097 –freight swaps — (11 ) — (11 ) Fair Value Measurements at December 31, 2015 using: Quoted Prices Significant Significant Total Trading securities held in the deferred compensation plans $ 62,376 $ — $ — $ 62,376 Derivatives – — 283,276 — 283,276 –basis swaps — 4,329 — 4,329
Value of Assets Measured at Fair Value on Non Recurring Basis	The following table presents the value of these assets measured at fair value on a non-recurring basis at the time impairment was recorded (in thousands): Three Months Ended March 31, 2016 2015 Fair Value Impairment Fair Value Value Impairment Natural gas and oil properties $ 90,150 $ 43,040 $ ¾ $ ¾
Carrying Amounts and Fair Values of Financial Instruments	The following table presents the carrying amounts and the fair values of our financial instruments as of March 31, 2016 and December 31, 2015 (in thousands): March 31, 2016 December 31, 2015 Carrying Fair Carrying Fair Assets: Commodity swaps and basis swaps $ 266,509 $ 266,509 $ 288,762 $ 288,762 Marketable securities (a) 63,018 63,018 62,376 62,376 (Liabilities): Commodity swaps and basis swaps (1,462 ) (1,462 ) (1,157 ) (1,157 ) Bank credit facility (b) (31,000 ) (31,000 ) (95,000 ) (95,000 ) Deferred compensation plan (c) (139,279 ) (139,279 ) (122,918 ) (122,918 ) 4.875% senior notes due 2025 (b) (750,000 ) (651,563 ) (750,000 ) (572,813 ) 5.75% senior subordinated notes due 2021 (b) (500,000 ) (441,250 ) (500,000 ) (396,250 ) 5.00% senior subordinated notes due 2022 (b) (600,000 ) (515,250 ) (600,000 ) (447,000 ) 5.00% senior subordinated notes due 2023 (b) (750,000 ) (635,625 ) (750,000 ) (551,250 ) (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 at the closing price on the balance sheet date which is a Level 1 input.

Stock-Based Compensation Plans

Stock-Based Compensation Plans (Tables)	3 Months Ended
	Mar. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Allocation of Stock-Based Compensation by Functional Category	The following table details the allocation of stock-based compensation to functional expense categories (in thousands): Three Months Ended 2016 2015 Direct operating expense $ 588 $ 886 Brokered natural gas and marketing expense 516 506 Exploration expense 690 732 General and administrative expense 11,113 11,080 Termination costs ¾ 1,287 Total stock-based compensation $ 12,907 $ 14,491
Summary of Performance Share Unit Awards Activities	The following is a summary of our non-vested PSU awards outstanding at March 31, 2016: Units Weighted Outstanding at December 31, 2015 262,124 $ 64.77 Units granted (a) 118,193 30.47 Units vested (42,546 ) 60.75 Units forfeited ¾ ¾ Outstanding at March 31, 2016 337,771 $ 53.28 (a)
Schedule of Share Based Payment Award Performance Stock Awards Valuation Assumptions	The following assumptions were used to estimate the fair value of PSUs granted during first quarter 2016: Three Months Ended March 31, 2016 2015 Risk-free interest rate 0.85 % 1.05 % Expected annual volatility 51.7 % 33.9 % Weighted average grant date fair value per unit $ 30.47 $ 55.17
Restricted Stock and Restricted Stock Units Outstanding	The following is a summary of the status of our non-vested restricted stock outstanding at March 31, 2016: Equity Awards Liability Awards Shares Weighted Shares Weighted Outstanding at December 31, 2015 436,764 $ 59.74 308,737 $ 65.80 Granted 927,266 28.04 136,275 28.40 Vested (135,715 ) 49.30 (69,683 ) 65.22 Forfeited (30,281 ) 50.73 (4,038 ) 52.45 Outstanding at March 31, 2016 1,198,034 $ 36.61 371,291 $ 52.32
Stock Option and SARs Activities	Information with respect to SARs activity is summarized below: Shares Weighted Outstanding at December 31, 2015 1,510,977 $ 63.73 Exercised ¾ — Expired/forfeited (102,661 ) 49.18 Outstanding at March 31, 2016 1,408,316 $ 64.79

Supplemental Cash Flow Inform33

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Mar. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Three Months Ended 2016 2015 (in thousands) Net cash provided from operating activities included: Income taxes refunded from taxing authorities $ 73 $ — Interest paid (37,117 ) (54,284 ) Non-cash investing and financing activities included: Increase in asset retirement costs capitalized 1,015 15,813 Increase (decrease) in accrued capital expenditures 9,719 (110,622 )

Office Closing and Terminatio34

Office Closing and Termination Costs (Tables)	3 Months Ended
	Mar. 31, 2016
Restructuring And Related Activities [Abstract]
Summary of Termination Costs	The following summarizes our termination costs for the three months ended March 31, 2016 and 2015 (in thousands): Three Months Ended March 31, 2016 2015 Termination costs $ – $ 1,431 Building lease 162 3,232 Stock-based compensation – 1,287 $ 162 $ 5,950
Exit Costs Included in Accrued Liabilities in Consolidated Balance Sheet	The following details our accrued liability as of March 31, 2016 (in thousands): March 31, 2016 Beginning balance $ 11,630 Accrued building rent 162 Payments (5,405 ) Ending balance $ 6,387

Capitalized Costs and Accumul35

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Tables)	3 Months Ended
	Mar. 31, 2016
Extractive Industries [Abstract]
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	March 31, December 31, (in thousands) Natural gas and oil properties: Properties subject to depletion $ 8,030,190 $ 8,047,181 Unproved properties 935,189 949,155 Total 8,965,379 8,996,336 Accumulated depreciation, depletion and amortization (2,748,635 ) (2,635,031 ) Net capitalized costs $ 6,216,744 $ 6,361,305 (a) Includes capitalized asset retirement costs and the associated accumulated amortization.

Costs Incurred for Property A36

Costs Incurred for Property Acquisition, Exploration and Development (Tables)	3 Months Ended
	Mar. 31, 2016
Extractive Industries [Abstract]
Costs Incurred for Property Acquisition, Exploration and Development	Three Months 2016 Year Ended (in thousands) Acreage purchases $ 5,341 $ 73,025 Development 120,903 708,268 Exploration: Drilling 9,097 87,505 Expense 4,223 18,421 Stock-based compensation expense 690 2,985 Gas gathering facilities: Development 848 13,337 Subtotal 141,102 903,541 Asset retirement obligations 1,015 22,184 Total costs incurred $ 142,117 $ 925,725 (a) Includes costs incurred whether capitalized or expensed.

Acquisitions and Dispositions -

Acquisitions and Dispositions - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets	$ (1,643,000)	$ (175,000)
Northeast Pennsylvania Non-operated Interest
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets	(2,100,000)
Proceeds from sale of oil and gas	111,500,000
Miscellaneous Proved, Unproved Properties and Surface Acreage
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
(Loss) gain on the sale of assets	443,000	(175,000)
Proceeds from sale of oil and gas	1,600,000	10,700,000
Mississippi and South Texas properties
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of oil and gas	$ 1,200,000
West Texas Properties
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Proceeds from sale of oil and gas		$ 10,500,000

Income Taxes - Income Tax (Bene

Income Taxes - Income Tax (Benefit) Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Components Of Income Tax Expense Benefit Continuing Operations [Abstract]
Income tax (benefit) expense	$ (44,038)	$ 22,366
Effective tax rate	32.40%	44.70%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Taxes [Line Items]
Federal statutory rate	35.00%	35.00%
Income tax (benefit) expense	$ (44,038,000)	$ 22,366,000
Equity Compensation [Member]
Income Taxes [Line Items]
Income tax (benefit) expense	3,600,000
Deferred compensation plan
Income Taxes [Line Items]
Income tax (benefit) expense	(96,000)	(2,000,000)
Valuation Allowance, Operating Loss Carryforwards | State
Income Taxes [Line Items]
Income tax (benefit) expense	$ 4,500,000	$ 5,100,000

(Loss) Income Per Common Shar40

(Loss) Income Per Common Share - Computations of Basic and Diluted (Loss) Income Per Common Share (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share Reconciliation [Abstract]
Net (loss) income, as reported		$ (91,710)	$ 27,684
Participating earnings	[1]	(56)	(463)
Basic net (loss) income attributed to common shareholders		(91,766)	27,221
Reallocation of participating earnings	[1]	0	0
Diluted net (loss) income attributed to common shareholders		$ (91,766)	$ 27,221
Net (loss) income per common share:
Basic		$ (0.55)	$ 0.16
Diluted		$ (0.55)	$ 0.16
[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.

(Loss) Income Per Common Shar41

(Loss) Income Per Common Share - Basic Weighted Average Common Shares Outstanding to Diluted Weighted Average Common Shares Outstanding (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Weighted average common shares outstanding – basic	166,803	166,039
Effect of dilutive securities:
Director and employee SARs	0	27
Weighted average common shares outstanding – diluted	166,803	166,066

(Loss) Income Per Common Shar42

(Loss) Income Per Common Share - Additional Information (Detail) - shares shares in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Stock Appreciation Rights (SARs)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Stock excluded from earning per share calculation		1.4
Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Stock excluded from earning per share calculation	2.8	2.8

Suspended Exploratory Well Co43

Suspended Exploratory Well Costs - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Extractive Industries [Abstract]
Capitalized exploratory well costs that have been capitalized for a period greater than one year	$ 0	$ 2,996

Suspended Exploratory Well Co44

Suspended Exploratory Well Costs - Suspended Exploratory Well Costs (Detail) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)Project
Extractive Industries [Abstract]
Balance at beginning of period	$ 4,161	$ 2,996
Additions to capitalized exploratory well costs pending the determination of proved reserves	1,214	1,165
Reclassifications to wells, facilities and equipment based on determination of proved reserves	(5,375)
Balance at end of period		4,161
Less exploratory well costs that have been capitalized for a period of one year or less		(1,165)
Capitalized exploratory well costs that have been capitalized for a period greater than one year	$ 0	$ 2,996
Number of projects that have exploratory well costs that have been capitalized greater than one year | Project		1

Indebtedness - Additional Infor

Indebtedness - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Interest capitalized during the period	$ 0	$ 0

Indebtedness - Debt Outstanding

Indebtedness - Debt Outstanding (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Bank debt	$ 23,149	$ 86,427
Senior notes	738,362	738,101
Senior subordinated notes	1,827,554	1,826,775
Total debt	2,589,065	2,651,303
4.875% Senior Notes Due 2025
Debt Instrument [Line Items]
Senior notes	738,362	738,101
Notes Payable to Banks | 2.4% Bank Debt
Debt Instrument [Line Items]
Bank debt	23,149	86,427
Senior Subordinated Notes | 5.75% Senior Subordinated Notes Due 2021
Debt Instrument [Line Items]
Senior subordinated notes	494,329	494,095
Senior Subordinated Notes | 5.00% Senior Subordinated Notes Due 2022
Debt Instrument [Line Items]
Senior subordinated notes	592,492	592,223
Senior Subordinated Notes | 5.00% Senior Subordinated Notes Due 2023
Debt Instrument [Line Items]
Senior subordinated notes	$ 740,733	$ 740,457

Indebtedness - Debt Outstandi47

Indebtedness - Debt Outstanding (Parenthetical) (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	May. 31, 2015
Notes Payable to Banks | 2.4% Bank Debt
Debt Instrument [Line Items]
Bank debt percentage	2.40%	2.40%
Unamortized debt issuance costs, net	$ 7,851	$ 8,573
Senior Notes | 4.875% Senior Notes Due 2025
Debt Instrument [Line Items]
Interest rate on notes	4.875%	4.875%	4.875%
Unamortized debt issuance costs, net	$ 11,638	$ 11,899
Senior Subordinated Notes | 5.75% Senior Subordinated Notes Due 2021
Debt Instrument [Line Items]
Interest rate on notes	5.75%	5.75%
Unamortized debt issuance costs, net	$ 5,671	$ 5,905
Senior Subordinated Notes | 5.00% Senior Subordinated Notes Due 2022
Debt Instrument [Line Items]
Interest rate on notes	5.00%	5.00%
Unamortized debt issuance costs, net	$ 7,508	$ 7,777
Senior Subordinated Notes | 5.00% Senior Subordinated Notes Due 2023
Debt Instrument [Line Items]
Interest rate on notes	5.00%	5.00%
Unamortized debt issuance costs, net	$ 9,267	$ 9,543

Indebtedness - Bank Debt - Addi

Indebtedness - Bank Debt - Additional Information (Detail) - Bank Credit Facility	3 Months Ended
	Mar. 31, 2016USD ($)CommercialBank	Mar. 31, 2015	Mar. 17, 2016USD ($)
Debt Instrument [Line Items]
Bank Credit facility, maximum amount	$ 4,000,000,000
Bank Credit facility, borrowing base			$ 3,000,000,000
Bank commitments			$ 2,000,000,000
Percentage holding of commercial banks, Maximum	5.80%
Number of commercial banks included in current bank group | CommercialBank	29
Maturity date of loan	Oct. 16, 2019
Bank debt	$ 31,000,000
Undrawn letters of credit	230,800,000
Borrowing capacity available under the commitment amount	$ 1,700,000,000
Weighted average interest rate on the bank credit facility	2.10%	1.80%
Annual rate of commitment fee paid on the undrawn balance	0.30%
Alternate Base Rate
Debt Instrument [Line Items]
Minimum range of base rate	0.25%
Maximum range of base rate	1.25%
Interest rate margin	0.25%
Alternate Base Rate | Credit Facility
Debt Instrument [Line Items]
Minimum range of base rate	0.125%
Maximum range of base rate	0.75%
LIBOR Rate
Debt Instrument [Line Items]
Minimum range of base rate	1.25%
Maximum range of base rate	2.25%
Interest rate margin	1.25%
LIBOR Rate | Credit Facility
Debt Instrument [Line Items]
Minimum range of base rate	1.125%
Maximum range of base rate	1.75%
Minimum
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance	0.30%
Minimum | Credit Facility
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance	0.15%
Maximum
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance	0.375%
Maximum | Credit Facility
Debt Instrument [Line Items]
Annual rate of commitment fee paid on the undrawn balance	0.30%

Indebtedness - Senior Notes - A

Indebtedness - Senior Notes - Additional Information (Detail) - 4.875% Senior Notes Due 2025 - USD ($) $ in Millions	1 Months Ended
	May. 31, 2015	Mar. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Aggregate principal amount	$ 750
Senior Notes
Debt Instrument [Line Items]
Interest rate on notes	4.875%	4.875%	4.875%
Net proceeds after underwriting discounts and commissions	$ 737.4
Underwriting discounts and commissions	$ 12.6
Maximum redemption price of notes as percentage of principal amount	101.00%

Indebtedness - Senior Subordina

Indebtedness - Senior Subordinated Notes - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016
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	3 Months Ended
	Mar. 31, 2016USD ($)
Debt Instrument [Line Items]
Debt instrument, Covenant compliance	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 credit agreement) to cash interest expense of equal to or greater than 2.5 and a current ratio (as defined in the credit agreement) of no less than 1.0. In addition, the ratio of the present value of proved reserves (as defined in the credit 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 March 31, 2016. The indentures governing our senior subordinated notes contain various restrictive covenants that are substantially identical to each other and may limit our ability to, among other things, pay cash dividends, incur additional indebtedness, sell assets, enter into transactions with affiliates, or change the nature of our business. At March 31, 2016, we were in compliance with these covenants. Our senior subordinated notes also include a limitation on the amount of credit facility debt we can incur. Certain thresholds, as set forth in the indenture debt incurrence test, may limit our ability to incur debt under our bank credit facility in excess of a $1.5 billion floor amount based on levels of commodity prices of natural gas, NGLs and crude oil used in the annual calculation of discounted future cash flows relating to proved oil and gas reserves (as further defined in the indenture). Based on the year-end 2015 discounted future net cash flows, our bank credit facility usage is limited to $1.5 billion until higher prices or proved reserve additions increase discounted future net cash flows.
Senior Subordinated Notes
Debt Instrument [Line Items]
Bank credit facility, debt incurrence limit	$ 1,500,000,000
Bank Credit facility, current usage limit	$ 1,500,000,000
Maximum
Debt Instrument [Line Items]
Ratio of debt to EBITDAX	250.00%
Present Value Of Proved Reserves To Total Debt.	150.00%
Minimum
Debt Instrument [Line Items]
Current ratio	100.00%

Asset Retirement Obligations -

Asset Retirement Obligations - Asset Retirement Obligations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Asset Retirement Obligation [Abstract]
Beginning of period	$ 264,137
Liabilities incurred	194
Liabilities settled	(3,201)
Disposition of wells	(2,164)
Accretion expense	3,978
Change in estimate	821
End of period	263,765
Less current portion	(15,071)	$ (15,071)
Long-term asset retirement obligations	$ 248,694

Capital Stock - Additional Info

Capital Stock - Additional Information (Detail) - shares	Mar. 31, 2016	Dec. 31, 2015
Class Of Stock Disclosures [Abstract]
Authorized capital stock	485,000,000	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

Capital Stock (Detail)

Capital Stock (Detail) - shares	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Stockholders Equity Note [Abstract]
Beginning balance	169,316,460	168,628,177
SARs exercised	0	77,002
Restricted stock grants	132,237	335,103
Restricted stock units vested	238,238	252,507
Treasury shares issued	9,720	23,671
Ending balance	169,696,655	169,316,460

Derivative Activities - Additio

Derivative Activities - Additional Information (Detail)	Mar. 31, 2016USD ($)MMBTU / dMMBTUbblt_per_M
Derivatives Excluding Basis Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 262,000,000
Natural Gas | 2016 | Swaps
Derivative [Line Items]
Volume Hedged | MMBTU / d	760,000
Natural Gas | 2017 | Swaps
Derivative [Line Items]
Volume Hedged | MMBTU / d	155,000
Natural Gas | Basis Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 640,000
Volume Hedged | MMBTU	52,360,000
Propane | Spread Swaps
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ 2,500,000
Propane | Spread Swaps | 2016
Derivative [Line Items]
Volume Hedged | bbl	1,675,000
Propane | Spread Swaps | 2017
Derivative [Line Items]
Volume Hedged | bbl	750,000
Freight | Swaps | Level 2
Derivative [Line Items]
Derivative assets liabilities at fair value net	$ (11,000)
Volume Hedged | t_per_M	5,000

Derivative Activities - Derivat

Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Detail) - Swaps	Mar. 31, 2016MMBTU / dbbl / d$ / MMBTU$ / bbl$ / gal
Natural Gas | 2016
Derivative [Line Items]
Volume Hedged | MMBTU / d	760,000
Weighted Average Hedge Price | $ / MMBTU	3.22
Natural Gas | 2017
Derivative [Line Items]
Volume Hedged | MMBTU / d	155,000
Weighted Average Hedge Price | $ / MMBTU	2.82
Natural Gas | 2018
Derivative [Line Items]
Volume Hedged | MMBTU / d	27,500
Weighted Average Hedge Price | $ / MMBTU	2.84
Crude Oil | 2016
Derivative [Line Items]
Volume Hedged	5,498
Weighted Average Hedge Price | $ / bbl	59.74
Crude Oil | 2017
Derivative [Line Items]
Volume Hedged	1,000
Weighted Average Hedge Price | $ / bbl	50.13
Commodity Contract NGLs (C3 - Propane) | 2016
Derivative [Line Items]
Volume Hedged	5,500
Weighted Average Hedge Price | $ / gal	0.60
Commodity Contract NGLs (NC4 - Normal Butane) | 2016
Derivative [Line Items]
Volume Hedged	3,750
Weighted Average Hedge Price | $ / gal	0.66
Commodity Contract NGLs (C5 - Natural Gasoline) | 2016
Derivative [Line Items]
Volume Hedged	3,417
Weighted Average Hedge Price | $ / gal	1.12
Commodity Contract NGLs (C5 - Natural Gasoline) | 2017
Derivative [Line Items]
Volume Hedged	750
Weighted Average Hedge Price | $ / gal	0.91

Derivative Activities - Schedul

Derivative Activities - Schedule of Additional Information Related to Master Netting Arrangements with Derivative Counterparties (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Gross Amounts of Recognized Assets	$ 277,171	$ 304,350
Gross Amounts Offset in the Balance Sheet	(10,662)	(15,588)
Net Amounts of Assets Presented in the Balance Sheet	266,509	288,762
Gross Amounts of Recognized (Liabilities)	(12,124)	(16,745)
Gross Amounts Offset in the Balance Sheet	10,662	15,588
Net Amounts of (Liabilities) Presented in the Balance Sheet	(1,462)	(1,157)
Natural Gas | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	214,389	219,357
Gross Amounts Offset in the Balance Sheet	(1,943)	(10,245)
Net Amounts of Assets Presented in the Balance Sheet	212,446	209,112
Gross Amounts of Recognized (Liabilities)	(3,399)	(10,245)
Gross Amounts Offset in the Balance Sheet	1,943	10,245
Net Amounts of (Liabilities) Presented in the Balance Sheet	(1,456)	0
Natural Gas | Basis Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	3,327	8,251
Gross Amounts Offset in the Balance Sheet	(2,648)	(2,765)
Net Amounts of Assets Presented in the Balance Sheet	679	5,486
Gross Amounts of Recognized (Liabilities)	(2,686)	(2,786)
Gross Amounts Offset in the Balance Sheet	2,648	2,765
Net Amounts of (Liabilities) Presented in the Balance Sheet	(38)	(21)
Crude Oil | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	29,273	38,699
Gross Amounts Offset in the Balance Sheet	(183)	0
Net Amounts of Assets Presented in the Balance Sheet	29,090	38,699
Gross Amounts of Recognized (Liabilities)	(81)
Gross Amounts Offset in the Balance Sheet	183
Net Amounts of (Liabilities) Presented in the Balance Sheet	102
Commodity Contract NGLs (C3 - Propane) | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	8,380	15,884
Gross Amounts Offset in the Balance Sheet	0	0
Net Amounts of Assets Presented in the Balance Sheet	8,380	15,884
Commodity Contract NGLs (C3 - Propane) | Spread Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	7,373	2,497
Gross Amounts Offset in the Balance Sheet	(4,916)	(2,497)
Net Amounts of Assets Presented in the Balance Sheet	2,457	0
Gross Amounts of Recognized (Liabilities)	(4,916)	(3,633)
Gross Amounts Offset in the Balance Sheet	4,916	2,497
Net Amounts of (Liabilities) Presented in the Balance Sheet	0	(1,136)
Commodity Contract NGLs (NC4 - Normal Butane) | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	4,972	6,968
Gross Amounts Offset in the Balance Sheet	(199)	0
Net Amounts of Assets Presented in the Balance Sheet	4,773	6,968
Gross Amounts of Recognized (Liabilities)	(199)
Gross Amounts Offset in the Balance Sheet	199
Net Amounts of (Liabilities) Presented in the Balance Sheet	0
Commodity Contract NGLs (C5 - Natural Gasoline) | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	9,457	12,694
Gross Amounts Offset in the Balance Sheet	(762)	(81)
Net Amounts of Assets Presented in the Balance Sheet	8,695	12,613
Gross Amounts of Recognized (Liabilities)	(832)	(81)
Gross Amounts Offset in the Balance Sheet	762	81
Net Amounts of (Liabilities) Presented in the Balance Sheet	(70)	$ 0
Freight | Swaps
Derivative [Line Items]
Gross Amounts of Recognized Assets	0
Gross Amounts Offset in the Balance Sheet	(11)
Net Amounts of Assets Presented in the Balance Sheet	(11)
Gross Amounts of Recognized (Liabilities)	(11)
Gross Amounts Offset in the Balance Sheet	11
Net Amounts of (Liabilities) Presented in the Balance Sheet	$ 0

Derivative Activities - Effects

Derivative Activities - Effects of Non-Hedge Derivatives on Consolidated Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Derivative [Line Items]
Derivative Fair Value Income (Loss)	$ 86,908	$ 122,839
Collars
Derivative [Line Items]
Derivative Fair Value Income (Loss)	0	8,415
Basis Swaps
Derivative [Line Items]
Derivative Fair Value Income (Loss)	7,275	(11,353)
Commodity | Swaps
Derivative [Line Items]
Derivative Fair Value Income (Loss)	79,644	125,777
Freight | Swaps
Derivative [Line Items]
Derivative Fair Value Income (Loss)	$ (11)	$ 0

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value (Detail) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Swaps | Fair Value, Inputs, Level 2 | Freight
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	$ (11,000)
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading securities held in the deferred compensation plans	63,018,000	$ 62,376,000
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Trading securities held in the deferred compensation plans	63,018,000	62,376,000
Fair Value, Measurements, Recurring | Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	261,961,000	283,276,000
Fair Value, Measurements, Recurring | Swaps | Freight
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(11,000)
Fair Value, Measurements, Recurring | Swaps | Fair Value, Inputs, Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	261,961,000	283,276,000
Fair Value, Measurements, Recurring | Swaps | Fair Value, Inputs, Level 2 | Freight
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	(11,000)
Fair Value, Measurements, Recurring | Basis Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	3,097,000	4,329,000
Fair Value, Measurements, Recurring | Basis Swaps | Fair Value, Inputs, Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative assets liabilities at fair value net	$ 3,097,000	$ 4,329,000

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Counterparty	Mar. 31, 2015USD ($)	Dec. 31, 2015USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Interest and dividends	$ 136	$ 109
Mark-to-market gain (loss)	259	1,400
Impairment on natural gas and oil properties	43,040	$ 0
Allowance for doubtful accounts on accounts receivable	$ 4,477		$ 4,994
Number of financial institutions included in counter parties | Counterparty	19
Number of counterparties | Counterparty	4
Net derivative asset	$ 9,500
Western Oklahoma
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment on natural gas and oil properties	$ 43,040

Fair Value Measurements - Value

Fair Value Measurements - Value of Assets Measured at Fair Value on Non Recurring Basis (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Impairment of proved properties and other assets	$ 43,040	$ 0
Fair Value, Measurements, Nonrecurring | Natural Gas and Oil Properties
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	90,150	0
Impairment of proved properties and other assets	$ 43,040	$ 0

Fair Value Measurements - Carry

Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Carrying Value
Assets:
Commodity swaps and basis swaps		$ 266,509	$ 288,762
Marketable securities	[1]	63,018	62,376
(Liabilities):
Commodity swaps and basis swaps		(1,462)	(1,157)
Bank credit facility	[2]	(31,000)	(95,000)
Deferred compensation plan	[3]	(139,279)	(122,918)
Carrying Value | 4.875% Senior Notes Due 2025
(Liabilities):
Subordinated debt	[2]	(750,000)	(750,000)
Carrying Value | 5.75% Senior Subordinated Notes Due 2021
(Liabilities):
Subordinated debt	[2]	(500,000)	(500,000)
Carrying Value | 5.00% Senior Subordinated Notes Due 2022
(Liabilities):
Subordinated debt	[2]	(600,000)	(600,000)
Carrying Value | 5.00% Senior Subordinated Notes Due 2023
(Liabilities):
Subordinated debt	[2]	(750,000)	(750,000)
Fair Value
Assets:
Commodity swaps and basis swaps		266,509	288,762
Marketable securities	[1]	63,018	62,376
(Liabilities):
Commodity swaps and basis swaps		(1,462)	(1,157)
Bank credit facility	[2]	(31,000)	(95,000)
Deferred compensation plan	[3]	(139,279)	(122,918)
Fair Value | 4.875% Senior Notes Due 2025
(Liabilities):
Subordinated debt	[2]	(651,563)	(572,813)
Fair Value | 5.75% Senior Subordinated Notes Due 2021
(Liabilities):
Subordinated debt	[2]	(441,250)	(396,250)
Fair Value | 5.00% Senior Subordinated Notes Due 2022
(Liabilities):
Subordinated debt	[2]	(515,250)	(447,000)
Fair Value | 5.00% Senior Subordinated Notes Due 2023
(Liabilities):
Subordinated debt	[2]	$ (635,625)	$ (551,250)
[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 at the closing price on the balance sheet date which is a Level 1 input.

Fair Value Measurements - Car63

Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Parenthetical) (Detail)	Mar. 31, 2016	Dec. 31, 2015	May. 31, 2015
Senior Notes | 4.875% Senior Notes Due 2025
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate on notes	4.875%	4.875%	4.875%
Senior Subordinated Notes | 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%
Senior Subordinated Notes | 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%
Senior Subordinated Notes | 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 Plan64

Stock-Based Compensation Plans - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2014
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Actual payout of shares on performance units granted	150.00%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Actual payout of shares on performance units granted	0.00%
Stock Appreciation Rights (SARs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Stock Appreciation Rights (SARs) | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiration term of stock units	5 years
Restricted Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years	3 years

Stock-Based Compensation Plan65

Stock-Based Compensation Plans - Allocation of Stock-Based Compensation by Functional Category (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2016		Mar. 31, 2015	Dec. 31, 2015	[1]
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 12,907		$ 14,491
Direct Operating Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	588		886
Brokered Natural Gas and Marketing Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	516		506
Exploration Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	690	[1]	732	$ 2,985
General and Administrative Expense
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	11,113		11,080
Termination Costs
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 0		$ 1,287
[1]	Includes costs incurred whether capitalized or expensed.

Stock-Based Compensation Plan66

Stock-Based Compensation Plans - PSUA Activities (Detail) - Performance Shares - $ / shares		3 Months Ended
		Mar. 31, 2016		Mar. 31, 2015
Summary of Performance Share Unit Awards outstanding, Number of Units
Outstanding, Beginning Balance		262,124
Granted	[1]	118,193
Vested		(42,546)
Forfeited		0
Outstanding, Ending Balance		337,771
Summary of Performance Share Unit Awards outstanding, Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance, weighted average grant date fair value		$ 64.77
Granted, weighted average grant date fair value		30.47	[1]	$ 55.17
Vested, weighted average grant date fair value		60.75
Forfeited, weighted average grant date fair value		0
Outstanding, Ending Balance, weighted average grant date fair value		$ 53.28
[1]	Amounts granted reflect the number of performance units granted; however, the actual payout of shares will be between zero percent and 150% of the performance units granted depending on the total shareholder return ranking compared to the peer companies at the end of the three-year performance period.

Stock-Based Compensation Plan67

Stock-Based Compensation Plans - PSUA Activities (Parenthetical) (Detail)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2014
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years	3 years
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Actual payout of shares on performance units granted	0.00%
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Actual payout of shares on performance units granted	150.00%

Stock-Based Compensation Plan68

Stock-Based Compensation Plans - Valuation Assumptions for Grant Date Fair Value of Performance Awards (Detail) - Performance Shares - $ / shares	3 Months Ended
	Mar. 31, 2016		Mar. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	0.85%		1.05%
Expected annual volatility	51.70%		33.90%
Weighted average grant date fair value per unit	$ 30.47	[1]	$ 55.17
[1]	Amounts granted reflect the number of performance units granted; however, the actual payout of shares will be between zero percent and 150% of the performance units granted depending on the total shareholder return ranking compared to the peer companies at the end of the three-year performance period.

Stock-Based Compensation Plan69

Stock-Based Compensation Plans - Additional Information 1 (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 12,907	$ 14,491
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 2,500	$ 1,300

Stock-Based Compensation Plan70

Stock-Based Compensation Plans - Additional Information 2 (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)Plans$ / sharesshares	Mar. 31, 2015USD ($)$ / sharesshares	Dec. 31, 2015shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense | $	$ 12,907	$ 14,491
Active equity-based stock plans | Plans	1
Equity Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted | shares	927,266	548,000
Granted, weighted average grant date fair value | $ / shares	$ 28.04	$ 52.25
Vesting period	3 years
Stock-based compensation expense | $	$ 5,800	$ 7,800
Restricted Stock Liability Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted | shares	136,275	95,000
Granted, weighted average grant date fair value | $ / shares	$ 28.40	$ 52.25
Restricted Stock Liability Awards | Employees
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years	3 years
Stock-based compensation expense | $	$ 3,700	$ 3,900
Stock Appreciation Rights (SARs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting period	3 years
Number of stock option outstanding | shares	1,408,316		1,510,977

Stock-Based Compensation Plan71

Stock-Based Compensation Plans - Restricted Stock and Restricted Stock Units Outstanding (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Equity Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Beginning Balance	436,764
Granted	927,266	548,000
Vested	(135,715)
Forfeited	(30,281)
Outstanding, Ending Balance	1,198,034
Outstanding, Beginning Balance, weighted average grant date fair value	$ 59.74
Granted, weighted average grant date fair value	28.04	$ 52.25
Vested, weighted average grant date fair value	49.30
Forfeited, weighted average grant date fair value	50.73
Outstanding, Ending Balance, weighted average grant date fair value	$ 36.61
Liability Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding, Beginning Balance	308,737
Granted	136,275	95,000
Vested	(69,683)
Forfeited	(4,038)
Outstanding, Ending Balance	371,291
Outstanding, Beginning Balance, weighted average grant date fair value	$ 65.80
Granted, weighted average grant date fair value	28.40	$ 52.25
Vested, weighted average grant date fair value	65.22
Forfeited, weighted average grant date fair value	52.45
Outstanding, Ending Balance, weighted average grant date fair value	$ 52.32

Stock-Based Compensation Plan72

Stock-Based Compensation Plans - Stock Option and SARs Activities (Detail) - Stock Appreciation Rights (SARs)	3 Months Ended
	Mar. 31, 2016$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Beginning Balance, Shares | shares	1,510,977
Exercised, Shares | shares	0
Expired/forfeited, Shares | shares	(102,661)
Ending Balance, Shares | shares	1,408,316
Beginning Balance, Weighted Average Exercise Price | $ / shares	$ 63.73
Exercised, Weighted Average Exercise Price | $ / shares	0
Expired/forfeited, Weighted Average Exercise Price | $ / shares	49.18
Ending Balance, Weighted Average Exercise Price | $ / shares	$ 64.79

Stock-Based Compensation Plan73

Stock-Based Compensation Plans - Additional Information 3 (Detail) - USD ($) $ in Thousands, shares in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Deferred compensation plan vesting period	3 years
Deferred compensation plan	$ 16,056	$ (5,624)
Shares held in rabbi trust total	2.8		2.8
Vested shares held in rabbi trust	2.4		2.5

Supplemental Cash Flow Inform74

Supplemental Cash Flow Information - Supplemental Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2016		Mar. 31, 2015	Dec. 31, 2015	[1]
Net cash provided from operating activities included:
Income taxes refunded from taxing authorities	$ 73		$ 0
Interest paid	(37,117)		(54,284)
Non-cash investing and financing activities included:
Increase in asset retirement costs capitalized	1,015	[1]	15,813	$ 22,184
Increase (decrease) in accrued capital expenditures	$ 9,719		$ (110,622)
[1]	Includes costs incurred whether capitalized or expensed.

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)MMBTU / d
Commitments And Contingencies Disclosure [Line Items]
Transportation commitments future minimum transportation fees due three months change | $	$ 12.7
Period of transportation commitments future minimum transportation fees due three months change	9 years
Natural Gas | Minimum
Commitments And Contingencies Disclosure [Line Items]
Transportation and gathering commitments contingent upon pipeline construction or modification, term of contract	1 year
Oil and Gas Delivery Commitments and Contracts, Daily Production	1,500
Natural Gas | Maximum
Commitments And Contingencies Disclosure [Line Items]
Transportation and gathering commitments contingent upon pipeline construction or modification, term of contract	5 years
Oil and Gas Delivery Commitments and Contracts, Daily Production	15,000

Office Closing and Terminatio76

Office Closing and Termination Costs - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2015
Restructuring Cost And Reserve [Line Items]
Termination costs	$ 162	$ 5,950	$ 8,400
Stock-based compensation expense (gain)	0	1,287
Building lease	$ 162	$ 3,232		$ 3,200
Oklahoma City Restructuring
Restructuring Cost And Reserve [Line Items]
Additional accruals for severance costs				275
Stock-based compensation expense (gain)				$ 608

Office Closing and Terminatio77

Office Closing and Termination Costs - Summary of Termination Costs (Detail) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Termination costs	$ 0	$ 1,431
Building lease	162	3,232		$ 3,200
Stock-based compensation expense (gain)	0	1,287
Total termination costs	$ 162	$ 5,950	$ 8,400

Office Closing and Terminatio78

Office Closing and Termination Costs - Exit Costs Included in Accrued Liabilities in Consolidated Balance Sheet (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2016USD ($)
Exit costs included in accrued liabilities in consolidated balance sheet
Beginning balance	$ 11,630
Accrued building rent	162
Payments	(5,405)
Ending balance	$ 6,387

Capitalized Costs and Accumul79

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Detail) - USD ($) $ in Thousands		Mar. 31, 2016	Dec. 31, 2015
Natural gas and oil properties:
Properties subject to depletion	[1]	$ 8,030,190	$ 8,047,181
Unproved properties	[1]	935,189	949,155
Total	[1]	8,965,379	8,996,336
Accumulated depletion and depreciation	[1]	(2,748,635)	(2,635,031)
Natural gas and oil properties, successful efforts method, net	[1]	$ 6,216,744	$ 6,361,305
[1]	Includes capitalized asset retirement costs and the associated accumulated amortization.

Costs Incurred for Property A80

Costs Incurred for Property Acquisition, Exploration and Development (Detail) - USD ($) $ in Thousands		3 Months Ended			12 Months Ended
		Mar. 31, 2016		Mar. 31, 2015	Dec. 31, 2015
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items]
Acreage purchases	[1]	$ 5,341			$ 73,025
Development	[1]	120,903			708,268
Exploration:
Exploration drilling costs incurred	[1]	9,097			87,505
Stock-based compensation expense		12,907		$ 14,491
Gas gathering facilities:
Development	[1]	848			13,337
Subtotal	[1]	141,102			903,541
Asset retirement obligations		1,015	[1]	15,813	22,184	[1]
Total costs incurred	[1]	142,117			925,725
Expense
Exploration:
Exploration costs incurred	[1]	4,223			18,421
Stock-based compensation expense		$ 690	[1]	$ 732	$ 2,985	[1]
[1]	Includes costs incurred whether capitalized or expensed.