Range Resources (RRC) 10-Q 28 Jul 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 25, 2014
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Jun-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Trading Symbol	'RRC	'
Entity Registrant Name	'RANGE RESOURCES CORP	'
Entity Central Index Key	'0000315852	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	168,697,568

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$292	$348
Accounts receivable, less allowance for doubtful accounts of $2,743 and $2,494	183,749	179,667
Derivative assets	5,463	4,421
Deferred tax asset	39,411	51,414
Inventory and other	18,664	12,451
Total current assets	247,579	248,301
Derivative assets	4,760	9,233
Equity method investments	'	129,034
Natural gas and oil properties, successful efforts method	9,732,010	9,032,881
Accumulated depletion and depreciation	-2,336,666	-2,274,444
Natural gas and oil properties, successful efforts method, net	7,395,344	6,758,437
Transportation and field assets	123,471	118,625
Accumulated depreciation and amortization	-84,807	-85,841
Transportation and field assets, net	38,664	32,784
Other assets	114,211	121,297
Total assets	7,800,558	7,299,086
Current liabilities:	'	'
Accounts payable	291,107	258,431
Asset retirement obligations	5,037	5,037
Accrued liabilities	158,518	161,520
Accrued interest	41,243	44,375
Derivative liabilities	62,965	26,198
Total current liabilities	558,870	495,561
Bank debt	480,000	500,000
Subordinated notes	2,350,000	2,640,516
Deferred tax liability	894,115	771,980
Derivative liabilities	7,101	25
Deferred compensation liability	240,787	247,537
Asset retirement obligations and other liabilities	249,511	229,015
Total liabilities	4,780,384	4,884,634
Commitments and contingencies	'	'
Stockholders’ Equity	'	'
Preferred stock, $1 par, 10,000,000 shares authorized, none issued and outstanding	'	'
Common stock, $0.01 par, 475,000,000 shares authorized, 168,693,792 issued at June 30, 2014 and 163,441,414 issued at December 31, 2013	1,687	1,634
Common stock held in treasury, 83,184 shares at June 30, 2014 and 98,520 shares at December 31, 2013	-3,096	-3,637
Additional paid-in capital	2,378,254	1,959,636
Retained earnings	641,379	450,583
Accumulated other comprehensive income	1,950	6,236
Total stockholders’ equity	3,020,174	2,414,452
Total liabilities and stockholders’ equity	$7,800,558	$7,299,086

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts on accounts receivable	$2,743	$2,494
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	168,693,792	163,441,414
Common stock held in treasury, shares	83,184	98,520

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues and other income:	'	'	'	'
Natural gas, NGLs and oil sales	$477,517	$437,678	$1,049,534	$835,917
Derivative fair value (loss) income	-24,109	137,760	-170,959	37,885
Gain on the sale of assets	282,064	83,287	281,711	83,121
Brokered natural gas, marketing and other	30,052	14,631	62,580	35,672
Total revenues and other income	765,524	673,356	1,222,866	992,595
Costs and expenses:	'	'	'	'
Direct operating	34,935	32,636	74,730	62,824
Transportation, gathering and compression	76,809	66,048	150,970	128,464
Production and ad valorem taxes	10,844	11,113	22,522	22,496
Brokered natural gas and marketing	34,775	16,662	68,904	38,977
Exploration	13,621	13,068	28,467	29,848
Abandonment and impairment of unproved properties	9,332	19,156	19,327	34,374
General and administrative	56,888	101,987	106,100	186,045
Deferred compensation plan	10,519	-6,878	8,484	35,482
Interest expense	45,488	45,071	90,889	87,281
Loss on early extinguishment of debt	24,596	12,280	24,596	12,280
Depletion, depreciation and amortization	133,361	119,995	262,043	235,096
Impairment of proved properties and other assets	24,991	741	24,991	741
Total costs and expenses	476,159	431,879	882,023	873,908
Income from operations before income taxes	289,365	241,477	340,843	118,687
Income tax expense (benefit)	'	'	'	'
Current	-1	-25	5	'
Deferred	117,977	97,519	136,928	50,314
Total income tax expense (benefit)	117,976	97,494	136,933	50,314
Net income	$171,389	$143,983	$203,910	$68,373
Net income per common share:	'	'	'	'
Basic	$1.04	$0.88	$1.24	$0.42
Diluted	$1.04	$0.88	$1.24	$0.42
Dividends paid per common share	$0.04	$0.04	$0.08	$0.08
Weighted average common shares outstanding:	'	'	'	'
Basic	161,909	160,565	161,354	160,346
Diluted	162,813	161,414	162,323	161,223

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Net income	$171,389		$143,983		$203,910		$68,373
Other comprehensive income (loss):	'		'		'		'
Realized loss (gain) on hedge derivative contract settlements reclassified into natural gas, NGLs and oil sales from other comprehensive income, net of taxes	'		'		'		-14,840	[1]
De-designated hedges reclassified into natural gas, NGLs and oil sales, net of taxes	-3,046	[2]	-18,616	[2]	-4,286	[2]	-26,041	[2]
De-designated hedges reclassified to derivative fair value income, net of taxes	'		-547	[3]	'		-1,937	[3]
Change in unrealized deferred hedging (losses) gains, net of taxes	'		'		'		-4,203	[4]
Total comprehensive income	$168,343		$124,820		$199,624		$21,352
[1]	Amounts are net of income tax benefit of $9,488 for the six months ended June 30, 2013.
[2]	Amounts are net of income tax benefit of $1,866 for the three months ended June 30, 2014 and $2,790 for the six months ended June 30, 2014. Amounts are net of income tax benefit of $11,902 for the three months ended June 30, 2013 and $16,649 for the six months ended June 30, 2013.
[3]	Amounts relate to transactions not probable of occurring and are presented net of income tax benefit of $350 for the three months ended June 30, 2013 and $1,239 for the six months ended June 30, 2013.
[4]	Amounts are net of income tax benefit of $2,687 for the six months ended June 30, 2013.

CONSOLIDATED_STATEMENTS_OF_COM1

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Realized loss (gain) on hedge derivative contract settlements reclassified into natural gas, NGLs and oil sales from other comprehensive income, tax portion	'	'	'	$9,488
De-designated hedges reclassified into natural gas, NGLs and oil sales, tax portion	1,866	11,902	2,790	16,649
De-designated hedges reclassified to derivative fair value income, tax portion	'	350	'	1,239
Change in unrealized deferred hedging (losses) gains, tax effect	'	'	'	$2,687

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Operating activities:	'	'
Net income	$203,910	$68,373
Adjustments to reconcile net income to net cash provided from operating activities:	'	'
Loss (gain) from equity method investments, net of distributions	3,096	-1,552
Deferred income tax expense	136,928	50,314
Depletion, depreciation and amortization and impairment	287,034	235,837
Exploration dry hole costs	1	-159
Abandonment and impairment of unproved properties	19,327	34,374
Derivative fair value loss (income)	170,959	-37,885
Cash settlements on derivative financial instruments that do not qualify for hedge accounting	-130,762	-21,384
Allowance for bad debt	250	250
Amortization of deferred financing costs, loss on extinguishment of debt and other	29,812	16,662
Deferred and stock-based compensation	47,912	63,325
Gain on the sale of assets	-281,711	-83,121
Changes in working capital:	'	'
Accounts receivable	1,275	-2,143
Inventory and other	-6,872	1,545
Accounts payable	20,115	-10,381
Accrued liabilities and other	-59,751	-34,166
Net cash provided from operating activities	441,523	279,889
Investing activities:	'	'
Additions to natural gas and oil properties	-546,354	-592,692
Additions to field service assets	-5,119	-2,033
Acreage purchases	-110,471	-27,449
Equity method investments	1,103	1,885
Proceeds from disposal of assets	146,140	296,068
Purchases of marketable securities held by the deferred compensation plan	-11,251	-20,213
Proceeds from the sales of marketable securities held by the deferred compensation plan	13,343	16,342
Net cash used in investing activities	-512,609	-328,092
Financing activities:	'	'
Borrowing on credit facilities	1,175,000	893,000
Repayment on credit facilities	-1,195,000	-1,323,000
Issuance of subordinated notes	'	750,000
Repayment of subordinated notes	-312,000	-259,063
Dividends paid	-13,114	-13,057
Debt issuance costs	'	-12,324
Issuance of common stock, net of offering expenses	396,662	343
Change in cash overdrafts	4,679	-1,155
Proceeds from the sales of common stock held by the deferred compensation plan	14,803	13,491
Net cash provided from financing activities	71,030	48,235
(Decrease) increase in cash and cash equivalents	-56	32
Cash and cash equivalents at beginning of period	348	252
Cash and cash equivalents at end of period	$292	$284

Summary_of_Organization_and_Na

Summary of Organization and Nature of Business	6 Months Ended
	Jun. 30, 2014
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 and Southwestern regions 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	6 Months Ended
	Jun. 30, 2014
Basis of Presentation	'
	(2) BASIS OF PRESENTATION
	Presentation
	These interim financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Range Resources Corporation 2013 Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on February 26, 2014. The results of operations for the second quarter and the six months ended June 30, 2014 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. Certain reclassifications have been made to prior years reported amounts in order to conform with the current year presentation including reclassifications between accounts payable and accrued liabilities within cash flow from operating activities and a change in the presentation for our derivative activities. These reclassifications have no impact on previously reported net income, stockholders’ equity or cash flows.
	De-designation of Commodity Derivative Contracts
	Effective March 1, 2013, we elected to discontinue hedge accounting prospectively. After March 1, 2013, both realized and unrealized gains and losses are recognized in derivative fair value income or loss immediately each quarter as derivative contracts are settled and marked to market. For additional information, see Note 11.

New_Accounting_Standards

New Accounting Standards	6 Months Ended
	Jun. 30, 2014
New Accounting Standards	'
	(3) NEW ACCOUNTING STANDARDS
	Not Yet Adopted
	In May 2014, an accounting standards update was issued for “Revenue from Contracts with Customers,” which supersedes the revenue recognition requirements in “Topic 605, Revenue Recognition” and requires entities to recognize revenue in a way that depicts the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The new guidance is effective retrospectively for us for the reporting period beginning January 1, 2017, with early application not permitted. We are evaluating our existing revenue recognition policies to determine whether any contracts will be affected by the new requirements.
	Recently Adopted
	In February 2013, an accounting standards update was issued to provide guidance for the recognition, measurement, and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date, except for obligations such as asset retirement and environmental obligations, contingencies, guarantees, income taxes and retirement benefits, which are separately addressed within U.S. GAAP. An entity is required to measure obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date as the sum of (1) the amount the entity agreed to pay on the basis of its arrangement among its co-obligors and (2) any amount the entity expects to pay on behalf of its co-obligors. Disclosure of the nature of the obligation, including how the liability arose, the relationship with other co-obligors and the terms and conditions of the arrangement is required. In addition, the total outstanding amount under the arrangement, not reduced by the effect of any amounts that may be recoverable from other entities, plus the carrying amount of any liability or receivable recognized must be disclosed. This accounting standards update is effective for us beginning in first quarter 2014 and should be applied retrospectively for those in-scope obligations resulting from joint and several liability arrangements that exist at the beginning of 2014. Early adoption was permitted and we adopted this new standard in first quarter 2014 which did not have an impact on our consolidated results of operations, financial position or cash flows.
	In April 2014, an accounting standards update was issued that raised the threshold for a disposal to qualify as a discontinued operation and requires new disclosures of both discontinued operations and certain other material disposal transactions that do not meet the revised definition of a discontinued operation. Under the updated standard, a disposal of a component or group of components of an entity is required to be reported as discontinued operations if the disposal represents a strategic shift that has (or will have) a major effect on an entity’s operations and financial results when the component or group of components of the entity (1) has been disposed of by a sale, (2) has been disposed of other than by sale or (3) is classified as held for sale. This accounting standards update is effective for annual periods beginning on or after December 15, 2014 and is applied prospectively. Early adoption is permitted but only for disposals (or classifications that are held for sale) that have not been reported in financial statements previously issued or available for use. We adopted this new standard in first quarter 2014 and, as a result, the Conger Exchange defined and described in more detail below, is not reported as a discontinued operation.

Acquisitions_and_Dispositions

Acquisitions and Dispositions	6 Months Ended
	Jun. 30, 2014
Acquisitions and Dispositions	'
	(4) ACQUISITIONS AND DISPOSITIONS
	Conger Exchange Transaction. In April 2014, we entered into an exchange agreement with EQT Corporation and certain of its affiliates (“collectively, EQT”) in which we sold our Conger assets in Glasscock and Sterling Counties, Texas in exchange for producing properties and other EQT assets in Virginia and $145.0 million in cash (“Conger Exchange”). We closed the exchange transaction on June 16, 2014. The assets exchanged meet the definition of a business under accounting standards and was recorded at fair value. We recognized a pre-tax gain of $275.2 million related to this exchange, before selling expenses of $5.0 million, which is recognized as a gain on sale of assets in our consolidated statement of operations for the three months and the six months ended June 30, 2014. The combined carrying amount of our Conger assets prior to the exchange was $271.8 million. We are in the process of identifying and determining the fair value of the assets acquired and liabilities assumed as part of the Conger Exchange. The following table presents a preliminary estimate of the fair value of assets acquired and liabilities assumed in the transaction, pending final closing adjustments (in thousands):
		Conger Exchange
	Consideration
	Fair value of net assets transferred	$	550,273
	Fair value of assets acquired and liabilities assumed
	Cash	$	145,000
	Working capital – Nora Gathering, LLC		14,244
	Natural gas and oil properties		407,255
	Transportation and field assets		7,793
	Other liabilities-firm transportation contract		(12,092	)
	Asset retirement obligations		(11,927	)
	Fair value of net assets acquired and liabilities assumed	$	550,273
	In connection with the Conger Exchange, we acquired the remaining 50% interest held by EQT in Nora Gathering, LLC (“NGLLC”), a natural gas gathering operation, which we had previously accounted for using the equity method of accounting. As of June 16, 2014, we have consolidated NGLLC into our consolidated financial statements. Our previous 50% membership interest in NGLLC was remeasured to fair value on the acquisition date, resulting in a gain of $10.0 million which is recognized in gain on sale of assets in our consolidated statement of operations for the three months and the six months ended June 30, 2014. We assumed trade receivables as part of the acquisition of NGLLC of $5.5 million, all of which we expect to collect.
	For the period from June 16, 2014 through June 30, 2014, we recognized $2.8 million of natural gas, oil and NGLs sales from the property interests acquired in the Conger Exchange and we recognized $2.1 million of field net operating income (defined as natural gas, oil and NGLs sales less direct operating expenses, production and ad valorem taxes and transportation expenses).
	Conger Exchange Fair Value
	Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (often referred to as the “exit price”). The fair value measurement is based on the assumptions of market participants and not those of the reporting entity. Therefore, entity-specific intentions do not impact the measurement of fair value unless those assumptions are consistent with market participant views.
	The fair value of the Conger Exchange described above was based on an income approach which was supplemented by a market approach. For the natural gas and oil properties, the income approach uses significant inputs not observable in the market, which are Level 3 inputs. The significant inputs assumed include future production and capital, commodity prices, risk-adjusted discount rates, natural gas and oil pricing differentials, and projected reserve recovery factors. The market approach uses inputs such as recent market transactions in a similar geographic region and with similar production. The income approach for the natural gas gathering operations was based on a discounted future net cash flow model, which uses Level 3 inputs and was supplemented by a market approach.
	Other 2014 Dispositions
	In addition to the Conger Exchange above, in the six months ended June 30, 2014, we sold miscellaneous proved property and inventory for proceeds of $1.1 million resulting in a pre-tax gain of $1.6 million.
	2013 Dispositions
	In April 2013, we completed the sale of certain of our Delaware and Permian Basin properties in southeast New Mexico and West Texas for a price of $275.0 million and we recognized pre-tax gain of $83.3 million, before selling expenses of $4.2 million. In addition, in the six months ended June 30, 2013, we sold miscellaneous proved and unproved properties and inventory for proceeds of $25.2 million resulting in a pre-tax gain of $3.7 million.

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Taxes	'
	(5) INCOME TAXES
	Income tax expense from operations was as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Income tax expense	$	117,976		$	97,494		$	136,933		$	50,314
	Effective tax rate		40.8	%		40.4	%		40.2	%		42.4	%
	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 second quarter and the six months ended June 30, 2014 and 2013, our overall effective tax rate on operations was different than the federal statutory rate of 35% due primarily to state income taxes, valuation allowances and other permanent differences.

Income_Loss_Per_Common_Share

Income (Loss) Per Common Share	6 Months Ended
	Jun. 30, 2014
Income Per Common Share	'
	(6) 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 stockholders 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						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Net income, as reported	$	171,389		$	143,983		$	203,910		$	68,373
	Participating basic earnings (a)		(2,868	)		(2,335	)		(3,460	)		(1,124	)
	Basic net income attributed to common shareholders		168,521			141,648			200,450			67,249
	Reallocation of participating earnings (a)		15			12			19			5
	Diluted net income attributed to common shareholders	$	168,536		$	141,660		$	200,469		$	67,254
	Net income per common share:
	Basic	$	1.04		$	0.88		$	1.24		$	0.42
	Diluted	$	1.04		$	0.88		$	1.24		$	0.42
	(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						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Denominator:
	Weighted average common shares outstanding – basic		161,909			160,565			161,354			160,346
	Effect of dilutive securities:
	Director and employee stock options and SARs		904			849			969			877
	Weighted average common shares outstanding – diluted		162,813			161,414			162,323			161,223
	Weighted average common shares-basic for the three months ended June 30, 2014 excludes 2.8 million shares and the three months ended June 30, 2013 excludes 2.6 million shares of restricted stock held in our deferred compensation plans (although all awards are issued and outstanding upon grant). Weighted average common shares-basic for the six months ended June 30, 2014 excludes 2.8 million shares of restricted stock compared to 2.7 million in the same period of 2013. All stock appreciation rights (“SARs”) for the three months ended June 30, 2014 or for the six months ended June 30, 2014 were included in the computations of diluted income from operations per share because the grant prices of the SARs were all less than the average market price of the common stock. SARs of 161,000 for the three months ended June 30, 2013 and 252,000 for the six months ended June 30, 2013 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 shares.

Suspended_Exploratory_Well_Cos

Suspended Exploratory Well Costs	6 Months Ended
	Jun. 30, 2014
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 presented in natural gas and oil properties in the accompanying consolidated balance sheets. If an exploratory well is determined to be impaired, the well costs are charged to exploration expense in the accompanying consolidated statements of operations. The following table reflects the changes in capitalized exploratory well costs for the six months ended June 30, 2014 and the year ended December 31, 2013 (in thousands except for number of projects):
		June 30,			December 31,
		2014			2013
	Balance at beginning of period	$	6,964		$	57,360
	Additions to capitalized exploratory well costs pending the determination of proved reserves		44,472			39,832
	Reclassifications to wells, facilities and equipment based on determination of proved reserves		—			(84,840	)
	Capitalized exploratory well costs charged to expense		—			—
	Divested wells		—			(5,388	)
	Balance at end of period		51,436			6,964
	Less exploratory well costs that have been capitalized for a period of one year or less		(44,472	)		—
	Capitalized exploratory well costs that have been capitalized for a period greater than one year	$	6,964		$	6,964
	Number of projects that have exploratory well costs that have been capitalized for a period greater than one year		1			1
	As of June 30, 2014, $7.0 million of capitalized exploratory well costs have been capitalized for more than one year which relates to one well in our Marcellus Shale area where we are evaluating pipeline options. The following table provides an aging of capitalized exploratory well costs that have been suspended for more than one year as of June 30, 2014 (in thousands):
		Total			2013			2012		2011
	Capitalized exploratory well costs that have been capitalized for more than one year	$	6,964		$	110		$	6,801	$	53

Indebtedness

Indebtedness	6 Months Ended
	Jun. 30, 2014
Indebtedness	'
	(8) INDEBTEDNESS
	We had the following debt outstanding as of the dates shown below (bank debt interest rate at June 30, 2014 is shown parenthetically) (in thousands). No interest was capitalized during the three months or the six months ended June 30, 2014 or 2013:
			June 30,		December 31,
			2014		2013
	Bank debt (1.9%)		$	480,000	$	500,000
	Senior subordinated notes:
	8.00% senior subordinated notes due 2019, net of $9,484 discount			¾		290,516
	6.75% senior subordinated notes due 2020			500,000		500,000
	5.75% senior subordinated notes due 2021			500,000		500,000
	5.00% senior subordinated notes due 2022			600,000		600,000
	5.00% senior subordinated notes due 2023			750,000		750,000
	Total debt		$	2,830,000	$	3,140,516
	Bank Debt
	In February 2011, 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. The bank credit facility provides for an initial commitment equal to the lesser of the facility amount or the borrowing base. On June 30, 2014, the facility amount was $1.75 billion and the borrowing base was $2.0 billion. The bank credit facility provides for a borrowing base subject to redeterminations semi-annually and for event-driven unscheduled redeterminations. As part of our semi-annual bank review completed on April 3, 2014, our borrowing base was reaffirmed at $2.0 billion and our facility amount was also reaffirmed at $1.75 billion. Our current bank group is composed of twenty-eight financial institutions with no one bank holding more than 9% of the total facility. The bank credit facility amount may be increased to the borrowing base amount with twenty days notice, subject to the banks agreeing to participate in the facility increase and our payment of a mutually acceptable commitment fee to those banks. As of June 30, 2014, the outstanding balance under our bank credit facility was $480.0 million. Additionally, we had $131.0 million of undrawn letters of credit leaving $1.1 billion of borrowing capacity available under the facility. The bank credit facility matures on February 18, 2016. Borrowings under the bank credit facility can either be at the Alternate Base Rate (as defined in the bank credit facility) plus a spread ranging from 0.50% to 1.5% or LIBOR borrowings at the Adjusted LIBO Rate (as defined in the bank credit facility) plus a spread ranging from 1.5% to 2.5%. 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 June 30, 2014 compared to 2.2% for the three months ended June 30, 2013. The weighted average interest rate was 2.1% for both the six months ended June 30, 2014 and 2013. A commitment fee is paid on the undrawn balance based on an annual rate of 0.375% to 0.50%. At June 30, 2014, the commitment fee was 0.375% and the interest rate margin was 1.75% on our LIBOR loans and 0.75% on our base rate loans.
	Senior Subordinated Notes
	If we experience a change of control, bondholders may require us to repurchase all or a portion of all 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 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.
	Early Extinguishment of Debt
	On May 27, 2014, we announced a call for the redemption of $300.0 million of our outstanding 8.0% senior subordinated notes due 2019 at 104.0% of par plus accrued and unpaid interest, which were redeemed on June 26, 2014. In second quarter 2014, we recognized a $24.6 million loss on extinguishment of debt, including transaction call premium cost as well as expensing of the remaining deferred financing costs on the repurchased debt.
	Guarantees
	Range Resources Corporation is a holding company which owns no operating assets and has no significant operations independent of its subsidiaries. The guarantees by our subsidiaries, who are 100% owned by Range, of our senior subordinated notes 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 and Maturity
	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 debt to EBITDAX (as defined in the credit agreement) of no greater than 4.25 to 1.0 and a current ratio (as defined in the credit agreement) of no less than 1.0 to 1.0. We were in compliance with our covenants under the bank credit facility at June 30, 2014.
	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 June 30, 2014, we are in compliance with these covenants.

Asset_Retirement_Obligations

Asset Retirement Obligations	6 Months Ended
	Jun. 30, 2014
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 life. 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 six months ended June 30, 2014 is as follows (in thousands):
		Six Months
		Ended
		June 30, 2014
	Beginning of period	$	230,077
	Liabilities incurred		3,854
	Acquisitions		11,927
	Disposition of wells		(12,057	)
	Liabilities settled		(2,142	)
	Change in estimate		1,777
	Accretion expense		7,370
	End of period		240,806
	Less current portion		(5,037	)
	Long-term asset retirement obligations	$	235,769
	Accretion expense is recognized as a component of depreciation, depletion and amortization expense in the accompanying statements of operations.

Capital_Stock

Capital Stock	6 Months Ended
	Jun. 30, 2014
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 2013:
		Six Months		Year
		Ended		Ended
		June 30,		December 31,
		2014		2013
	Beginning balance		163,342,894		162,514,098
	Public offering		4,560,000		¾
	SARs exercised		188,305		278,916
	Restricted stock granted		266,453		401,122
	Restricted stock units vested		237,620		119,480
	Treasury shares issued		15,336		29,278
	Ending balance		168,610,608		163,342,894

Derivative_Activities

Derivative Activities	6 Months Ended
	Jun. 30, 2014
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”) or Mont Belview for NGLs, approximated a net unrealized pre-tax loss of $68.5 million at June 30, 2014. These contracts expire monthly through December 2016. The following table sets forth our commodity-based derivative volumes by year as of June 30, 2014, excluding our basis swaps which are discussed separately below:
	Period		Contract Type		Volume Hedged		Weighted
							Average Hedge Price
	Natural Gas
	2014		Collars		447,500 Mmbtu/day		$ 3.84–$ 4.48
	2015		Collars		145,000 Mmbtu/day		$ 4.07–$ 4.56
	2014		Swaps		260,000 Mmbtu/day		$4.18
	2015		Swaps		287,432 Mmbtu/day		$4.22
	2016		Swaps		90,000 Mmbtu/day		$4.21
	Crude Oil
	2014		Collars		2,000 bbls/day		$ 85.55–$ 100.00
	2014		Swaps		9,500 bbls/day		$94.35
	2015		Swaps		9,626 bbls day		$90.57
	2016		Swaps		501 bbls/day		$91.10
	NGLs (C3-Propane)
	2014		Swaps		12,000 bbls/day		$ 1.02/gallon
	2015		Swaps		1,000 bbls/day		$ 1.10/gallon
	NGLs (NC4-Normal butane)
	2014		Swaps		4,000 bbls/day		$ 1.34/gallon
	NGLs (C5-Natural Gasoline)
	2014		Swaps		3,500 bbls/day		$ 2.17/gallon
	2015		Swaps		500 bbls/day		$ 2.14/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. Through February 28, 2013, changes in the fair value of our derivatives that qualified for hedge accounting were recorded as a component of accumulated other comprehensive income (“AOCI”) in the stockholders’ equity section of the accompanying consolidated balance sheets, which is later transferred to natural gas, NGLs and oil sales when the underlying physical transaction occurs and the hedging contract is settled. As of June 30, 2014, an unrealized pre-tax derivative gain of $3.1 million ($1.9 million after tax) was recorded in AOCI. See additional discussion below regarding the discontinuance of hedge accounting. 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 in derivative fair value income or loss.
	For those derivative instruments that qualified or were designated for hedge accounting, settled transaction gains and losses were determined monthly, and were included as increases or decreases to natural gas, NGLs and oil sales in the period the hedged production was sold. Through February 28, 2013, we had elected to designate our commodity derivative instruments that qualified for hedge accounting as cash flow hedges. Natural gas, NGLs and oil sales include $4.9 million of gains in second quarter 2014 compared to gains of $30.5 million in the same period of 2013 related to settled hedging transactions. Natural gas, NGLs and oil sales include $7.1 million of gains in the first six months 2014 compared to gains of $67.0 million in the same period of 2013. Any ineffectiveness associated with these hedge derivatives is reflected in derivative fair value income or loss in the accompanying statements of operations. The ineffective portion is generally calculated as the difference between the changes in fair value of the derivative and the estimated change in future cash flows from the item hedged. Derivative fair value income or loss for the three months and the six months ended June 30, 2014 includes no ineffective gains or losses compared to a loss of $2.9 million in the six months ended June 30, 2013. During the six months ended June 30, 2013, we recognized a pre-tax gain of $3.2 million in derivative fair value income as a result of the discontinuance of hedge accounting where we determined the transaction was probable not to occur primarily due to the sale of certain of our Delaware and Permian Basin properties in New Mexico and West Texas.
	Basis Swap Contracts
	In addition to the collars and swaps above, at June 30, 2014, we had natural gas basis swap contracts that are not designated for hedge accounting, which lock in the differential between NYMEX and certain of our physical pricing indicies in Appalachia. These contracts are for 215,693 Mmbtu/day and settle monthly through March 2015. The fair value of these contracts was a gain of $8.7 million on June 30, 2014.
	Discontinuance of Hedge Accounting
	Effective March 1, 2013, we elected to de-designate all commodity contracts that were previously designated as cash flow hedges and elected to discontinue hedge accounting prospectively. AOCI included $103.6 million ($63.2 million after tax) of unrealized net gains, representing the mark-to-market value of the effective portion of our cash flow hedges as of February 28, 2013. As a result of discontinuing hedge accounting, the mark-to-market values included in AOCI as of the de-designation date were frozen and will be reclassified into earnings in natural gas, NGLs and oil sales in future periods as the underlying hedged transactions occur. As of June 30, 2014, we expect to reclassify into earnings $3.1 million of unrealized gains in the remaining months of 2014.
	With the election to de-designate hedging instruments, all of our derivative instruments continue to be recorded at fair value with unrealized gains and losses recognized immediately in earnings rather than in AOCI. These mark-to-market adjustments will produce a degree of earnings volatility that can be significant from period to period, but such adjustments will have no cash flow impact relative to changes in market prices. The impact to cash flow occurs upon settlement of the underlying contract.
	Derivative Assets and Liabilities
	The combined fair value of derivatives included in the accompanying consolidated balance sheets as of June 30, 2014 and December 31, 2013 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):
				30-Jun-14
				Gross				Gross				Net Amounts
				Amounts				Amounts				of Assets
				of Recognized				Offset in the				Presented in the
				Assets				Balance Sheet				Balance Sheet
	Derivative assets:
	Natural gas	–swaps		$	4,967			$	(1,606	)		$	3,361
		–collars			3,594				(3,826	)			(232	)
		–basis swaps			19,606				(9,559	)			10,047
	Crude oil	–swaps			84				(2,305	)			(2,221	)
	NGLs	–C3 swaps			1,538				(2,160	)			(622	)
		–NC4 swap			1,227				(1,227	)			—
		–C5 swaps			86				(196	)			(110	)
				$	31,102			$	(20,879	)		$	10,223
				30-Jun-14
				Gross				Gross				Net Amounts of (Liabilities)
				Amounts				Amounts				Presented in the
				of Recognized				Offset in the				Balance Sheet
				(Liabilities)				Balance Sheet
	Derivative (liabilities):
	Natural gas	–swaps		$	(19,095	)		$	1,606			$	(17,489	)
		–collars			(15,750	)			3,826				(11,924	)
		–basis swaps			(10,934	)			9,559				(1,375	)
	Crude oil	–swaps			(36,628	)			2,305				(34,323	)
		–collars			(1,693	)			—				(1,693	)
	NGLs	–C3 swaps			(6,246	)			2,160				(4,086	)
		–NC4 swaps			(120	)			1,227				1,107
		–C5 swaps			(479	)			196				(283	)
				$	(90,945	)		$	20,879			$	(70,066	)
				December 31, 2013
				Gross				Gross				Net Amounts
Amounts				Amounts				of Assets
of Recognized				Offset in the				Presented in the
Assets				Balance Sheet				Balance Sheet
Derivative assets:
Natural gas	–swaps		$	4,240			$	(1,218	)		$	3,022
	–collars			16,057				(7,671	)			8,386
	–basis swaps			7,686				(7,686	)			—
Crude oil	–swaps			3,567				(1,321	)			2,246
NGLs	–C3 swaps			826				(826	)			—
	–NC4 swaps			863				(863	)			—
	–C5 swaps			121				(121	)			—
			$	33,360			$	(19,706	)		$	13,654
			December 31, 2013
			Gross				Gross				Net Amounts
			Amounts				Amounts				of (Liabilities)
			of Recognized				Offset in the				Presented in the
			(Liabilities)				Balance Sheet				Balance Sheet
Derivative (liabilities):
Natural gas	–swaps		$	(4,790	)		$	1,218			$	(3,572	)
	–collars			(13,345	)			7,671				(5,674	)
	–basis swaps			(3,756	)			7,686				3,930
Crude oil	–swaps			(4,711	)			1,321				(3,390	)
	–collars			(398	)			—				(398	)
NGLs	–C3 swaps			(18,172	)			826				(17,346	)
	–NC4 swaps			(757	)			863				106
	–C5 swaps			—				121				121
			$	(45,929	)		$	19,706			$	(26,223	)
The effects of our cash flow hedges (or those derivatives that previously qualified for hedge accounting) on AOCI in the accompanying consolidated balance sheets is summarized below (in thousands):
	Three Months Ended June 30,																Six Months Ended June 30,
	Change in Hedge								Realized Gain (Loss)								Change in Hedge								Realized Gain (Loss)
	Derivative Fair Value								Reclassified from OCI								Derivative Fair Value								Reclassified from OCI
									into Revenue (a)																into Revenue (a)
	2014				2013				2014				2013				2014				2013				2014			2013
Swaps	$	—			$	¾			$	1,052			$	3,875			$	¾			$	125			$	1,889		$	11,922
Collars		—				¾				3,860				27,540				¾				(7,015	)			5,188			58,272
Income taxes		—				¾				(1,866	)			(12,252	)			¾				2,687				(2,791	)		(27,376	)
	$	—			$	¾			$	3,046			$	19,163			$	¾			$	(4,203	)		$	4,286		$	42,818
(a)	For realized gains upon derivative contract settlement, the reduction in AOCI is offset by an increase in revenues, NGLs and oil sales. For realized losses upon derivative contract settlement, the increase in AOCI is offset by a decrease in revenues. See additional discussion above regarding the discontinuance of hedge accounting.
The effects of our non-hedge derivatives (or those derivatives that do not qualify for hedge accounting) and the ineffective portion of our hedge derivatives on our consolidated statements of operations is summarized below (in thousands):
		Three Months Ended June 30,
		Gain (Loss) Recognized in								Gain (Loss) Recognized in								Derivative Fair Value
		Income (Non-hedge Derivatives)								Income (Ineffective Portion)								Income (Loss)
		2014				2013				2014				2013				2014				2013
Swaps		$	(38,521	)		$	65,003			$	—			$	—			$	(38,521	)		$	65,003
Re-purchased swaps			—				(1,663	)			—				—				—				(1,663	)
Collars			1,032				74,420				—				—				1,032				74,420
Basis swaps			13,380				—				—				—				13,380				—
Total		$	(24,109	)		$	137,760			$	—			$	¾			$	(24,109	)		$	137,760
		Six Months Ended June 30,
		Gain (Loss) Recognized in								Gain (Loss) Recognized in								Derivative Fair Value
		Income (Non-hedge Derivatives)								Income (Ineffective Portion)								Income (Loss)
		2014				2013				2014				2013				2014				2013
Swaps		$	(82,593	)		$	21,927			$	—			$	(1,995	)		$	(82,593	)		$	19,932
Re-purchased swaps			—				(478	)			—				—				—				(478	)
Collars			(38,116	)			19,417				—				(896	)			(38,116	)			18,521
Basis swaps			(50,250	)			(90	)			—				—				(50,250	)			(90	)
Total		$	(170,959	)		$	40,776			$	—			$	(2,891	)		$	(170,959	)		$	37,885

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value Measurements	'
	(12) FAIR VALUE MEASUREMENTS
	Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. There are three approaches for measuring the fair value of assets and liabilities: the market approach, the income approach and the cost approach, each of which includes multiple valuation techniques. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to measure fair value by converting future amounts, such as cash flows or earnings, into a single present value amount using current market expectations about those future amounts. The cost approach is based on the amount that would currently be required to replace the service capacity of an asset. This is often referred to as current replacement cost. The cost approach assumes that the fair value would not exceed what it would cost a market participant to acquire or construct a substitute asset of comparable utility, adjusted for obsolescence.
	The fair value accounting standards do not prescribe which valuation technique should be used when measuring fair value and does not prioritize among the techniques. These standards establish a fair value hierarchy that prioritizes the inputs used in applying the various valuation techniques. Inputs broadly refer to the assumptions that market participants use to make pricing decisions, including assumptions about risk. Level 1 inputs are given the highest priority in the fair value hierarchy while Level 3 inputs are given the lowest priority. The three levels of the fair value hierarchy are as follows:
	—	Level 1 – Observable inputs that reflect unadjusted quoted prices for identical assets or liabilities in active markets as of the reporting date. Active markets are those in which transactions for the asset or liability occur in sufficient frequency and volume to provide pricing information on an ongoing basis.
	—	Level 2 – Observable market-based inputs or unobservable inputs that are corroborated by market data. These are inputs other than quoted prices in active markets included in Level 1, which are either directly or indirectly observable as of the reporting date.
	—	Level 3 – Unobservable inputs 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 June 30, 2014 using:
				Quoted Prices				Significant				Significant				Total
				in Active				Other				Unobservable				Carrying
				Markets for				Observable				Inputs				Value as of
				Identical Assets				Inputs				(Level 3)				June 30,
				(Level 1)				(Level 2)								2014
	Trading securities held in the deferred compensation plans		$	68,129			$	—			$	—			$	68,129
	Derivatives –swaps			—				(54,665	)			—				(54,665	)
	–collars			—				(13,849	)			—				(13,849	)
	–basis swaps			—				6,319				2,353				8,672
			Fair Value Measurements at December 31, 2013 using:
			Quoted Prices				Significant				Significant				Total
			in Active				Other				Unobservable				Carrying
			Markets for				Observable				Inputs				Value as of
			Identical Assets				Inputs				(Level 3)				December 31,
			(Level 1)				(Level 2)								2013
	Trading securities held in the deferred compensation plans		$	67,766			$	—			$	—			$	67,766
	Derivatives –swaps			—				(18,812	)			—				(18,812	)
	–collars			—				2,314				—				2,314
	–basis swaps			—				3,381				548				3,929
	Our trading securities in Level 1 are exchange-traded and measured at fair value with a market approach using end of period market values. Derivatives in Level 2 are measured at fair value with a market approach using third-party pricing services, which have been corroborated with data from active markets or broker quotes. As of June 30, 2014, we have four natural gas basis swaps categorized as Level 3 due to the forward price curve being unavailable for the regional sales point. We based the fair value on the most similar regional forward natural gas basis curve received from a third party pricing service along with assumed basis differentials based on historical trends.
	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 statement of operations. For second quarter 2014, interest and dividends were $103,000 and the mark-to-market adjustment was a gain of $2.1 million compared to interest and dividends of $629,000 and mark-to-market loss of $1.0 million in the same period of the prior year. For the six months ended June 30, 2014, interest and dividends were $171,000 and the mark-to-market adjustment was a gain of $2.6 million compared to interest and dividends of $668,000 and mark-to-market adjustment of a gain of $586,000 in the same period of 2013.
	Fair Values—Non-recurring
	Due to declines in estimated reserves, there were indications that the carrying values 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 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 inputs. We recorded non-cash charges during the three months and the six months ended June 30, 2014 of $25.0 million related to natural gas and oil properties in Mississippi, West Texas and North Texas. Also, in 2013 we evaluated certain surface property we owned which included a consideration for the potential sale of these assets and we recognized an impairment charge of $741,000. 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																Six Months Ended
		June 30,																June 30,
		2014								2013								2014				2013
			Fair Value				Impairment				Fair Value				Impairment				Fair Value		Impairment		Fair Value		Impairment
	Natural gas and oil properties	$	18,086			$	24,991			$	¾			$	¾			$	18,086	$	24,991	$	¾	$	¾
	Surface property	$	¾			$	¾			$	5,550			$	741			$	¾	$	¾	$	5,550	$	741
	Fair Values—Reported
	The following table presents the carrying amounts and the fair values of our financial instruments as of June 30, 2014 and December 31, 2013 (in thousands):
			June 30, 2014								December 31, 2013
			Carrying				Fair				Carrying				Fair
			Value				Value				Value				Value
	Assets:
	Commodity swaps, collars and basis swaps		$	10,223			$	10,223			$	13,654			$	13,654
	Marketable securities(a)			68,129				68,129				67,766				67,766
	(Liabilities):
	Commodity swaps, collars and basis swaps			(70,066	)			(70,066	)			(26,223	)			(26,223	)
	Bank credit facility(b)			(480,000	)			(480,000	)			(500,000	)			(500,000	)
	Deferred compensation plan(c)			(276,868	)			(276,868	)			(271,738	)			(271,738	)
	8.00% senior subordinated notes due 2019(b)			¾				¾				(290,516	)			(319,500	)
	6.75% senior subordinated notes due 2020(b)			(500,000	)			(539,375	)			(500,000	)			(541,250	)
	5.75% senior subordinated notes due 2021(b)			(500,000	)			(540,000	)			(500,000	)			(530,625	)
	5.00% senior subordinated notes due 2022(b)			(600,000	)			(636,000	)			(600,000	)			(588,750	)
	5.00% senior subordinated notes due 2023(b)			(750,000	)			(798,750	)			(750,000	)			(732,188	)
	(a)	Marketable securities, which are held in our deferred compensation plans, are actively traded on major exchanges. Refer to Note 13 for additional information.
	(b)	The book value of our bank debt approximates fair value because of its floating rate structure. The fair value of our senior subordinated notes is based on end of period market quotes which are Level 2 inputs. Refer to Note 8 for additional information.
	(c)	The fair value of our deferred compensation plan is updated on 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 June 30, 2014, our primary concentrations of credit risk are the risks of collecting accounts receivable and the risk of counterparties’ 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 uncollectible receivables was $2.7 million at June 30, 2014 and $2.5 million at December 31, 2013. As of June 30, 2014, our derivative contracts consist of swaps and collars. Our exposure to credit risk is diversified primarily among major investment grade financial institutions, the majority of which 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 June 30, 2014, our derivative counterparties include fifteen financial institutions, of which all but two are secured lenders in our bank credit facility. At June 30, 2014, our net derivative liabilities include a net payable to these two counterparties that are not included in our bank credit facility of $2.3 million.

StockBased_Compensation_Plans

Stock-Based Compensation Plans	6 Months Ended
	Jun. 30, 2014
Stock-Based Compensation Plans	'
	(13) STOCK-BASED COMPENSATION PLANS
	Stock-Based Awards
	In 2005, we began granting SARs to reduce the dilutive impact of our equity plans. SARs represent the right to receive a payment equal to the excess of the fair market value of shares of 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. Beginning in first quarter 2011, the Compensation Committee of the Board of Directors also 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 of the Board of Directors 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 PSU awards vest at the end of three years. 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 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. Compensation expense is recognized over the balance of 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 plans 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 that is allocated to functional expense categories (in thousands):
		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2014				2013				2014				2013
	Operating expense	$	1,937			$	696			$	2,789			$	1,357
	Brokered natural gas and marketing expense		1,130				530				1,658				779
	Exploration expense		1,222				960				2,375				2,030
	General and administrative expense		20,696				13,263				32,300				23,569
	Total	$	24,985			$	15,449			$	39,122			$	27,735
	Stock Appreciation Right Awards
	We have two active equity-based stock plans, the 2005 Plan and the 2004 Non-Employee Director Stock Option Plan. Under these plans, incentive and non-qualified stock options, SARs, restricted stock units 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. Of the 2.0 million grants outstanding at June 30, 2014, all are grants relating to SARs. Information with respect to SARs activity is summarized below:
			Shares				Weighted
							Average
							Exercise Price
	Outstanding at December 31, 2013			2,582,074			$	56.36
	Granted			1,104				81.74
	Exercised			(576,806	)			45.17
	Expired/forfeited			(66	)			46.44
	Outstanding at June 30, 2014			2,006,306			$	59.59
	During first six months 2014, we granted SARs to our non-executive chairman in conjunction with his retirement from Range as an employee. The weighted average grant date fair value of these SARs, based on our Black-Scholes-Merton assumptions, is shown below:
			Six
			Months Ended
			30-Jun-14
	Weighted average exercise price per share		$	81.74
	Expected annual dividends per share			0.2	%
	Expected life in years			4.3
	Expected volatility			33	%
	Risk-free interest rate			1.4	%
	Weighted average grant date fair value		$	23.17
	Performance Share Unit Awards
	The following is a summary of our non-vested PSU awards outstanding at June 30, 2014:
								Weighted
			Units (a)					Average
								Grant Date Fair Value
	Outstanding at December 31, 2013			—				$	—
	Units granted			227,929					86.14
	Units vested (b)			(53,792	)				86.4
	Outstanding at June 30, 2014			174,137				$	86.06
	(a)	Amounts granted reflect the number of performance units granted. The actual payout of shares may 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 vesting date.
	(b)	Primarily represents PSU awards granted to our prior executive chairman for the 2013 calendar year while he was a Range officer.
	The following assumptions were used to estimate the fair value of PSUs granted during the first six months 2014:
			Six
			Months Ended
			June 30, 2014
	Risk-free interest rate			0.77	%
	Expected annual volatility			32.5	%
	Grant date fair value per unit		$	86.14
	We recorded PSU compensation expense of $4.7 million in the first six months 2014 compared to none in the same period of 2013.
	Restricted Stock Awards
	Equity Awards
	In first six months 2014, we granted 355,000 restricted stock Equity Awards to employees at an average grant price of $84.96 compared to 388,700 restricted stock Equity Awards granted to employees at an average grant price of $71.05 in the same period of 2013. These awards generally vest over a three-year period. We recorded compensation expense for these Equity Awards of $14.7 million in the first six months 2014 compared to $9.5 million in the same period of 2013. Equity Awards are not issued to employees until they are vested. Employees do not have the option to receive cash.
	Liability Awards
	In first six months 2014, we granted 207,000 shares of restricted stock Liability Awards as compensation to employees at an average price of $87.27 with vesting generally over a three-year period and 61,000 shares were granted to non-employee directors at an average price of $88.47 with immediate vesting. In the same period of 2013, we granted 406,100 shares of Liability Awards as compensation to employees at an average price of $75.45 with vesting generally over a three-year period and 18,300 shares were granted to non-employee directors at an average price of $77.26 with immediate vesting. We recorded compensation expense for Liability Awards of $15.2 million in first six months 2014 compared to $11.1 million in the same period of 2013. Substantially all of these awards are held in our deferred compensation plan, are classified as a liability and are remeasured at fair value each reporting period. This mark-to-market adjustment is reported as deferred compensation expense in our consolidated statements of operations (see additional discussion below). A following is a summary of the status of our non-vested restricted stock and restricted stock units outstanding at June 30, 2014:
			Equity Awards								Liability Awards
			Shares				Weighted				Shares				Weighted
							Average Grant								Average Grant
							Date Fair Value								Date Fair Value
Outstanding at December 31, 2013			385,063			$	68.24				389,013			$	71.02
Granted			355,094				84.96				268,385				87.54
Vested			(196,227	)			72.11				(203,227	)			75.81
Forfeited			(16,005	)			75.16				(90	)			71.03
Outstanding at June 30, 2014			527,925			$	77.84				454,081			$	78.64
Deferred Compensation Plan
Our deferred compensation plan gives non-employee directors, officers and key employees 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 plans are held in a grantor trust, which we refer to as the Rabbi Trust, and are therefore available to satisfy the claims of our general creditors in the event of bankruptcy or insolvency. Our stock held in the Rabbi Trust is treated as a liability award as employees are allowed to take withdrawals from the Rabbi Trust either in cash or in Range stock. The liability for the vested portion of the stock held in the Rabbi Trust is reflected as deferred compensation liability in the accompanying consolidated balance sheets and is adjusted to fair value each reporting period by a charge or credit to deferred compensation plan expense on our consolidated statements of operations. The assets of the Rabbi Trust, other than our common stock, are invested in marketable securities and reported at their market value as other assets in the accompanying consolidated balance sheets. The deferred compensation liability reflects the vested market value of the marketable securities and Range stock held in the Rabbi Trust. Changes in the market value of the marketable securities and changes in the fair value of the deferred compensation plan liability are charged or credited to deferred compensation plan expense each quarter. We recorded mark-to-market loss of $10.5 million in second quarter 2014 compared to mark-to-market income of $6.9 million in second quarter 2013. We recorded mark-to-market loss of $8.5 million in the six months ended June 30, 2014 compared to mark-to-market loss of $35.5 million in the same period of 2013. The Rabbi Trust held 2.9 million shares (2.4 million of vested shares) of Range stock at June 30, 2014 compared to 2.8 million shares (2.4 million of vested shares) at December 31, 2013.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	6 Months Ended
	Jun. 30, 2014
Supplemental Cash Flow Information	'
	(14) SUPPLEMENTAL CASH FLOW INFORMATION
		Six Months Ended
		June 30,
		2014		2013
		(in thousands)
	Net cash provided from operating activities included:
	Income taxes paid to (refunded from) taxing authorities	$	39	$	(119	)
	Interest paid		89,381		74,940
	Non-cash investing and financing activities included:
	Increase (decrease) in asset retirement costs capitalized		5,516		(2,385	)
	Increase in accrued capital expenditures		15,211		74,428

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
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 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 will continue to evaluate our litigation quarterly and will establish and adjust any litigation reserves as appropriate to reflect our assessment of the then current status of litigation.
	Transportation and Gathering Contracts
	In the six months ended June 30, 2014, our transportation and gathering commitments increased by approximately $775.0 million over the next 25 years primarily due to new firm transportation contracts. In addition, we have entered into additional agreements which are contingent on certain pipeline and gathering modifications and/or construction that will range between five and twenty year terms and are expected to begin in late 2014 through 2017. Based on these new contracts, we will have additional transportation and gathering obligations for a range of natural gas volumes from 25,000 mcfe per day to 400,000 mcfe per day through the end of the contract term.
	Delivery Commitments
	In the six months ended June 30, 2014, we entered into new agreements with several pipeline companies and end users to deliver natural gas and ethane volumes from our production that are contingent upon pipeline and gathering modifications and/or construction. The new agreements to deliver 50,000 mmbtu per day to 80,000 mmbut per day of natural gas will range between five and ten years and are expected to begin in 2016 through 2019. The new ethane delivery agreements for 5,000 bbls per day to 10,000 bbls per day are for three to fifteen year terms and are expected to begin in 2017 through 2018.

Capitalized_Costs_and_Accumula

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	6 Months Ended
	Jun. 30, 2014
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	'
	(16) Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (a)
			June 30,			December 31,
			2014			2013
			(in thousands)
	Natural gas and oil properties:
	Properties subject to depletion		$	8,843,288		$	8,225,859
	Unproved properties			888,722			807,022
	Total			9,732,010			9,032,881
	Accumulated depreciation, depletion and amortization			(2,336,666	)		(2,274,444	)
	Net capitalized costs		$	7,395,344		$	6,758,437
	(a)	Includes capitalized asset retirement costs and the associated accumulated amortization.

Costs_Incurred_for_Property_Ac

Costs Incurred for Property Acquisition, Exploration and Development	6 Months Ended
	Jun. 30, 2014
Costs Incurred for Property Acquisition, Exploration and Development	'
	(17) Costs Incurred for Property Acquisition, Exploration and Development (a)
			Six		Year
			Months Ended		Ended
			June 30,		December 31,
			2014		2013
			(in thousands)
	Acquisitions (b)		$	407,255	$	¾
	Acreage purchases			107,379		137,538
	Development			512,703		938,668
	Exploration:
	Drilling			37,261		189,742
	Expense			26,092		60,384
	Stock-based compensation expense			2,375		4,025
	Gas gathering facilities:
	Development			7,371		47,086
	Subtotal			1,100,436		1,377,443
	Asset retirement obligations			5,516		76,373
	Total costs incurred		$	1,105,952	$	1,453,816
	(a)	Includes costs incurred whether capitalized or expensed.
	(b) See also Note 4 for additional information related to the Conger Exchange. Includes $134.8 million of gas gathering assets.

Acquisitions_and_Dispositions_

Acquisitions and Dispositions (Tables)	6 Months Ended
	Jun. 30, 2014
Summary of Fair Value of Assets Acquired and Liabilities Assumed in Transaction	'
	We are in the process of identifying and determining the fair value of the assets acquired and liabilities assumed as part of the Conger Exchange. The following table presents a preliminary estimate of the fair value of assets acquired and liabilities assumed in the transaction, pending final closing adjustments (in thousands):
		Conger Exchange
	Consideration
	Fair value of net assets transferred	$	550,273
	Fair value of assets acquired and liabilities assumed
	Cash	$	145,000
	Working capital – Nora Gathering, LLC		14,244
	Natural gas and oil properties		407,255
	Transportation and field assets		7,793
	Other liabilities-firm transportation contract		(12,092	)
	Asset retirement obligations		(11,927	)
	Fair value of net assets acquired and liabilities assumed	$	550,273

Income_Taxes_Tables

Income Taxes (Tables)	6 Months Ended
	Jun. 30, 2014
Income Tax Expense	'
	Income tax expense from operations was as follows (in thousands):
		Three Months Ended						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Income tax expense	$	117,976		$	97,494		$	136,933		$	50,314
	Effective tax rate		40.8	%		40.4	%		40.2	%		42.4	%

Income_Loss_Per_Common_Share_T

Income (Loss) Per Common Share (Tables)	6 Months Ended
	Jun. 30, 2014
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 stockholders 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						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Net income, as reported	$	171,389		$	143,983		$	203,910		$	68,373
	Participating basic earnings (a)		(2,868	)		(2,335	)		(3,460	)		(1,124	)
	Basic net income attributed to common shareholders		168,521			141,648			200,450			67,249
	Reallocation of participating earnings (a)		15			12			19			5
	Diluted net income attributed to common shareholders	$	168,536		$	141,660		$	200,469		$	67,254
	Net income per common share:
	Basic	$	1.04		$	0.88		$	1.24		$	0.42
	Diluted	$	1.04		$	0.88		$	1.24		$	0.42
	(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						Six Months Ended
		June 30,						June 30,
		2014			2013			2014			2013
	Denominator:
	Weighted average common shares outstanding – basic		161,909			160,565			161,354			160,346
	Effect of dilutive securities:
	Director and employee stock options and SARs		904			849			969			877
	Weighted average common shares outstanding – diluted		162,813			161,414			162,323			161,223

Suspended_Exploratory_Well_Cos1

Suspended Exploratory Well Costs (Tables)	6 Months Ended
	Jun. 30, 2014
Suspended Exploratory Well Costs	'
	The following table reflects the changes in capitalized exploratory well costs for the six months ended June 30, 2014 and the year ended December 31, 2013 (in thousands except for number of projects):
		June 30,			December 31,
		2014			2013
	Balance at beginning of period	$	6,964		$	57,360
	Additions to capitalized exploratory well costs pending the determination of proved reserves		44,472			39,832
	Reclassifications to wells, facilities and equipment based on determination of proved reserves		—			(84,840	)
	Capitalized exploratory well costs charged to expense		—			—
	Divested wells		—			(5,388	)
	Balance at end of period		51,436			6,964
	Less exploratory well costs that have been capitalized for a period of one year or less		(44,472	)		—
	Capitalized exploratory well costs that have been capitalized for a period greater than one year	$	6,964		$	6,964
	Number of projects that have exploratory well costs that have been capitalized for a period greater than one year		1			1
Aging of Capitalized Exploratory Well Costs Suspended More Than One Year	'
	The following table provides an aging of capitalized exploratory well costs that have been suspended for more than one year as of June 30, 2014 (in thousands):
		Total			2013			2012		2011
	Capitalized exploratory well costs that have been capitalized for more than one year	$	6,964		$	110		$	6,801	$	53

Indebtedness_Tables

Indebtedness (Tables)	6 Months Ended
	Jun. 30, 2014
Debt Outstanding	'
	We had the following debt outstanding as of the dates shown below (bank debt interest rate at June 30, 2014 is shown parenthetically) (in thousands). No interest was capitalized during the three months or the six months ended June 30, 2014 or 2013:
		June 30,		December 31,
		2014		2013
	Bank debt (1.9%)	$	480,000	$	500,000
	Senior subordinated notes:
	8.00% senior subordinated notes due 2019, net of $9,484 discount		¾		290,516
	6.75% senior subordinated notes due 2020		500,000		500,000
	5.75% senior subordinated notes due 2021		500,000		500,000
	5.00% senior subordinated notes due 2022		600,000		600,000
	5.00% senior subordinated notes due 2023		750,000		750,000
	Total debt	$	2,830,000	$	3,140,516

Asset_Retirement_Obligation_Ta

Asset Retirement Obligation (Tables)	6 Months Ended
	Jun. 30, 2014
Asset Retirement Obligation	'
	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 life. 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 six months ended June 30, 2014 is as follows (in thousands):
		Six Months
		Ended
		June 30, 2014
	Beginning of period	$	230,077
	Liabilities incurred		3,854
	Acquisitions		11,927
	Disposition of wells		(12,057	)
	Liabilities settled		(2,142	)
	Change in estimate		1,777
	Accretion expense		7,370
	End of period		240,806
	Less current portion		(5,037	)
	Long-term asset retirement obligations	$	235,769

Capital_Stock_Tables

Capital Stock (Tables)	6 Months Ended
	Jun. 30, 2014
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 2013:
		Six Months		Year
		Ended		Ended
		June 30,		December 31,
		2014		2013
	Beginning balance		163,342,894		162,514,098
	Public offering		4,560,000		¾
	SARs exercised		188,305		278,916
	Restricted stock granted		266,453		401,122
	Restricted stock units vested		237,620		119,480
	Treasury shares issued		15,336		29,278
	Ending balance		168,610,608		163,342,894

Derivative_Activities_Tables

Derivative Activities (Tables)	6 Months Ended
	Jun. 30, 2014
Derivative Volumes Hedged and Average Hedge Prices	'
	The following table sets forth our commodity-based derivative volumes by year as of June 30, 2014, excluding our basis swaps which are discussed separately below:
	Period		Contract Type		Volume Hedged		Weighted
							Average Hedge Price
	Natural Gas
	2014		Collars		447,500 Mmbtu/day		$ 3.84–$ 4.48
	2015		Collars		145,000 Mmbtu/day		$ 4.07–$ 4.56
	2014		Swaps		260,000 Mmbtu/day		$4.18
	2015		Swaps		287,432 Mmbtu/day		$4.22
	2016		Swaps		90,000 Mmbtu/day		$4.21
	Crude Oil
	2014		Collars		2,000 bbls/day		$ 85.55–$ 100.00
	2014		Swaps		9,500 bbls/day		$94.35
	2015		Swaps		9,626 bbls day		$90.57
	2016		Swaps		501 bbls/day		$91.10
	NGLs (C3-Propane)
	2014		Swaps		12,000 bbls/day		$ 1.02/gallon
	2015		Swaps		1,000 bbls/day		$ 1.10/gallon
	NGLs (NC4-Normal butane)
	2014		Swaps		4,000 bbls/day		$ 1.34/gallon
	NGLs (C5-Natural Gasoline)
	2014		Swaps		3,500 bbls/day		$ 2.17/gallon
	2015		Swaps		500 bbls/day		$ 2.14/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 June 30, 2014 and December 31, 2013 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):
				30-Jun-14
				Gross				Gross				Net Amounts
				Amounts				Amounts				of Assets
				of Recognized				Offset in the				Presented in the
				Assets				Balance Sheet				Balance Sheet
	Derivative assets:
	Natural gas	–swaps		$	4,967			$	(1,606	)		$	3,361
		–collars			3,594				(3,826	)			(232	)
		–basis swaps			19,606				(9,559	)			10,047
	Crude oil	–swaps			84				(2,305	)			(2,221	)
	NGLs	–C3 swaps			1,538				(2,160	)			(622	)
		–NC4 swap			1,227				(1,227	)			—
		–C5 swaps			86				(196	)			(110	)
				$	31,102			$	(20,879	)		$	10,223
				30-Jun-14
				Gross				Gross				Net Amounts of (Liabilities)
				Amounts				Amounts				Presented in the
				of Recognized				Offset in the				Balance Sheet
				(Liabilities)				Balance Sheet
	Derivative (liabilities):
	Natural gas	–swaps		$	(19,095	)		$	1,606			$	(17,489	)
		–collars			(15,750	)			3,826				(11,924	)
		–basis swaps			(10,934	)			9,559				(1,375	)
	Crude oil	–swaps			(36,628	)			2,305				(34,323	)
		–collars			(1,693	)			—				(1,693	)
	NGLs	–C3 swaps			(6,246	)			2,160				(4,086	)
		–NC4 swaps			(120	)			1,227				1,107
		–C5 swaps			(479	)			196				(283	)
				$	(90,945	)		$	20,879			$	(70,066	)
				December 31, 2013
				Gross				Gross				Net Amounts
				Amounts				Amounts				of Assets
				of Recognized				Offset in the				Presented in the
				Assets				Balance Sheet				Balance Sheet
	Derivative assets:
	Natural gas	–swaps		$	4,240			$	(1,218	)		$	3,022
		–collars			16,057				(7,671	)			8,386
		–basis swaps			7,686				(7,686	)			—
	Crude oil	–swaps			3,567				(1,321	)			2,246
	NGLs	–C3 swaps			826				(826	)			—
		–NC4 swaps			863				(863	)			—
		–C5 swaps			121				(121	)			—
				$	33,360			$	(19,706	)		$	13,654
				December 31, 2013
				Gross				Gross				Net Amounts
				Amounts				Amounts				of (Liabilities)
				of Recognized				Offset in the				Presented in the
				(Liabilities)				Balance Sheet				Balance Sheet
	Derivative (liabilities):
	Natural gas	–swaps		$	(4,790	)		$	1,218			$	(3,572	)
		–collars			(13,345	)			7,671				(5,674	)
		–basis swaps			(3,756	)			7,686				3,930
	Crude oil	–swaps			(4,711	)			1,321				(3,390	)
		–collars			(398	)			—				(398	)
	NGLs	–C3 swaps			(18,172	)			826				(17,346	)
		–NC4 swaps			(757	)			863				106
		–C5 swaps			—				121				121
				$	(45,929	)		$	19,706			$	(26,223	)
Effects of Cash Flow Hedges and Other Hedges on Accumulated Other Comprehensive Income	'
	The effects of our cash flow hedges (or those derivatives that previously qualified for hedge accounting) on AOCI in the accompanying consolidated balance sheets is summarized below (in thousands):
		Three Months Ended June 30,																Six Months Ended June 30,
		Change in Hedge								Realized Gain (Loss)								Change in Hedge								Realized Gain (Loss)
		Derivative Fair Value								Reclassified from OCI								Derivative Fair Value								Reclassified from OCI
										into Revenue (a)																into Revenue (a)
		2014				2013				2014				2013				2014				2013				2014			2013
	Swaps	$	—			$	¾			$	1,052			$	3,875			$	¾			$	125			$	1,889		$	11,922
	Collars		—				¾				3,860				27,540				¾				(7,015	)			5,188			58,272
	Income taxes		—				¾				(1,866	)			(12,252	)			¾				2,687				(2,791	)		(27,376	)
		$	—			$	¾			$	3,046			$	19,163			$	¾			$	(4,203	)		$	4,286		$	42,818
	(a)	For realized gains upon derivative contract settlement, the reduction in AOCI is offset by an increase in revenues, NGLs and oil sales. For realized losses upon derivative contract settlement, the increase in AOCI is offset by a decrease in revenues. See additional discussion above regarding the discontinuance of hedge accounting.
Effects of Non-Hedge Derivatives on Consolidated Statements of Operations	'
	The effects of our non-hedge derivatives (or those derivatives that do not qualify for hedge accounting) and the ineffective portion of our hedge derivatives on our consolidated statements of operations is summarized below (in thousands):
			Three Months Ended June 30,
			Gain (Loss) Recognized in								Gain (Loss) Recognized in								Derivative Fair Value
			Income (Non-hedge Derivatives)								Income (Ineffective Portion)								Income (Loss)
			2014				2013				2014				2013				2014				2013
	Swaps		$	(38,521	)		$	65,003			$	—			$	—			$	(38,521	)		$	65,003
	Re-purchased swaps			—				(1,663	)			—				—				—				(1,663	)
	Collars			1,032				74,420				—				—				1,032				74,420
	Basis swaps			13,380				—				—				—				13,380				—
	Total		$	(24,109	)		$	137,760			$	—			$	¾			$	(24,109	)		$	137,760
			Six Months Ended June 30,
			Gain (Loss) Recognized in								Gain (Loss) Recognized in								Derivative Fair Value
			Income (Non-hedge Derivatives)								Income (Ineffective Portion)								Income (Loss)
			2014				2013				2014				2013				2014				2013
	Swaps		$	(82,593	)		$	21,927			$	—			$	(1,995	)		$	(82,593	)		$	19,932
	Re-purchased swaps			—				(478	)			—				—				—				(478	)
	Collars			(38,116	)			19,417				—				(896	)			(38,116	)			18,521
	Basis swaps			(50,250	)			(90	)			—				—				(50,250	)			(90	)
	Total		$	(170,959	)		$	40,776			$	—			$	(2,891	)		$	(170,959	)		$	37,885

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
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 June 30, 2014 using:
				Quoted Prices				Significant				Significant				Total
				in Active				Other				Unobservable				Carrying
				Markets for				Observable				Inputs				Value as of
				Identical Assets				Inputs				(Level 3)				June 30,
				(Level 1)				(Level 2)								2014
	Trading securities held in the deferred compensation plans		$	68,129			$	—			$	—			$	68,129
	Derivatives –swaps			—				(54,665	)			—				(54,665	)
	–collars			—				(13,849	)			—				(13,849	)
	–basis swaps			—				6,319				2,353				8,672
			Fair Value Measurements at December 31, 2013 using:
			Quoted Prices				Significant				Significant				Total
			in Active				Other				Unobservable				Carrying
			Markets for				Observable				Inputs				Value as of
			Identical Assets				Inputs				(Level 3)				December 31,
			(Level 1)				(Level 2)								2013
	Trading securities held in the deferred compensation plans		$	67,766			$	—			$	—			$	67,766
	Derivatives –swaps			—				(18,812	)			—				(18,812	)
	–collars			—				2,314				—				2,314
	–basis swaps			—				3,381				548				3,929
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																Six Months Ended
		June 30,																June 30,
		2014								2013								2014				2013
			Fair Value				Impairment				Fair Value				Impairment				Fair Value		Impairment		Fair Value		Impairment
	Natural gas and oil properties	$	18,086			$	24,991			$	¾			$	¾			$	18,086	$	24,991	$	¾	$	¾
	Surface property	$	¾			$	¾			$	5,550			$	741			$	¾	$	¾	$	5,550	$	741
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 June 30, 2014 and December 31, 2013 (in thousands):
			June 30, 2014								December 31, 2013
			Carrying				Fair				Carrying				Fair
			Value				Value				Value				Value
	Assets:
	Commodity swaps, collars and basis swaps		$	10,223			$	10,223			$	13,654			$	13,654
	Marketable securities(a)			68,129				68,129				67,766				67,766
	(Liabilities):
	Commodity swaps, collars and basis swaps			(70,066	)			(70,066	)			(26,223	)			(26,223	)
	Bank credit facility(b)			(480,000	)			(480,000	)			(500,000	)			(500,000	)
	Deferred compensation plan(c)			(276,868	)			(276,868	)			(271,738	)			(271,738	)
	8.00% senior subordinated notes due 2019(b)			¾				¾				(290,516	)			(319,500	)
	6.75% senior subordinated notes due 2020(b)			(500,000	)			(539,375	)			(500,000	)			(541,250	)
	5.75% senior subordinated notes due 2021(b)			(500,000	)			(540,000	)			(500,000	)			(530,625	)
	5.00% senior subordinated notes due 2022(b)			(600,000	)			(636,000	)			(600,000	)			(588,750	)
	5.00% senior subordinated notes due 2023(b)			(750,000	)			(798,750	)			(750,000	)			(732,188	)
	(a)	Marketable securities, which are held in our deferred compensation plans, are actively traded on major exchanges. Refer to Note 13 for additional information.
	(b)	The book value of our bank debt approximates fair value because of its floating rate structure. The fair value of our senior subordinated notes is based on end of period market quotes which are Level 2 inputs. Refer to Note 8 for additional information.
	(c)	The fair value of our deferred compensation plan is updated on the closing price on the balance sheet date which is a Level 1 input.

StockBased_Compensation_Plans_

Stock-Based Compensation Plans (Tables)	6 Months Ended
	Jun. 30, 2014
Allocation of Stock-Based Compensation by Functional Category	'
	The following table details the allocation of stock-based compensation that is allocated to functional expense categories (in thousands):
		Three Months Ended								Six Months Ended
		June 30,								June 30,
		2014				2013				2014				2013
	Operating expense	$	1,937			$	696			$	2,789			$	1,357
	Brokered natural gas and marketing expense		1,130				530				1,658				779
	Exploration expense		1,222				960				2,375				2,030
	General and administrative expense		20,696				13,263				32,300				23,569
	Total	$	24,985			$	15,449			$	39,122			$	27,735
SARs Activities	'
	Information with respect to SARs activity is summarized below:
			Shares				Weighted
							Average
							Exercise Price
	Outstanding at December 31, 2013			2,582,074			$	56.36
	Granted			1,104				81.74
	Exercised			(576,806	)			45.17
	Expired/forfeited			(66	)			46.44
	Outstanding at June 30, 2014			2,006,306			$	59.59
Weighted Average Grant Date Fair Value of SARs	'
	During first six months 2014, we granted SARs to our non-executive chairman in conjunction with his retirement from Range as an employee. The weighted average grant date fair value of these SARs, based on our Black-Scholes-Merton assumptions, is shown below:
			Six
			Months Ended
			30-Jun-14
	Weighted average exercise price per share		$	81.74
	Expected annual dividends per share			0.2	%
	Expected life in years			4.3
	Expected volatility			33	%
	Risk-free interest rate			1.4	%
	Weighted average grant date fair value		$	23.17
Summary of Performance Share Unit Awards Activity	'
	The following is a summary of our non-vested PSU awards outstanding at June 30, 2014:
								Weighted
			Units (a)					Average
								Grant Date Fair Value
	Outstanding at December 31, 2013			—				$	—
	Units granted			227,929					86.14
	Units vested (b)			(53,792	)				86.4
	Outstanding at June 30, 2014			174,137				$	86.06
	(a)	Amounts granted reflect the number of performance units granted. The actual payout of shares may 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 vesting date.
	(b)	Primarily represents PSU awards granted to our prior executive chairman for the 2013 calendar year while he was a Range officer.
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 the first six months 2014:
			Six
			Months Ended
			June 30, 2014
	Risk-free interest rate			0.77	%
	Expected annual volatility			32.5	%
	Grant date fair value per unit		$	86.14
Restricted Stock and Restricted Stock Units Outstanding	'
			Equity Awards								Liability Awards
			Shares				Weighted				Shares				Weighted
							Average Grant								Average Grant
							Date Fair Value								Date Fair Value
	Outstanding at December 31, 2013			385,063			$	68.24				389,013			$	71.02
	Granted			355,094				84.96				268,385				87.54
	Vested			(196,227	)			72.11				(203,227	)			75.81
	Forfeited			(16,005	)			75.16				(90	)			71.03
	Outstanding at June 30, 2014			527,925			$	77.84				454,081			$	78.64

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	6 Months Ended
	Jun. 30, 2014
Supplemental Cash Flow Information	'
		Six Months Ended
		June 30,
		2014		2013
		(in thousands)
	Net cash provided from operating activities included:
	Income taxes paid to (refunded from) taxing authorities	$	39	$	(119	)
	Interest paid		89,381		74,940
	Non-cash investing and financing activities included:
	Increase (decrease) in asset retirement costs capitalized		5,516		(2,385	)
	Increase in accrued capital expenditures		15,211		74,428

Capitalized_Costs_and_Accumula1

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Tables)	6 Months Ended
	Jun. 30, 2014
Capitalized Costs and Accumulated Depreciation, Depletion and Amortization	'
			June 30,			December 31,
			2014			2013
			(in thousands)
	Natural gas and oil properties:
	Properties subject to depletion		$	8,843,288		$	8,225,859
	Unproved properties			888,722			807,022
	Total			9,732,010			9,032,881
	Accumulated depreciation, depletion and amortization			(2,336,666	)		(2,274,444	)
	Net capitalized costs		$	7,395,344		$	6,758,437
	(a)	Includes capitalized asset retirement costs and the associated accumulated amortization.

Costs_Incurred_for_Property_Ac1

Costs Incurred for Property Acquisition, Exploration and Development (Tables)	6 Months Ended
	Jun. 30, 2014
Costs Incurred for Property Acquisition, Exploration and Development	'
			Six		Year
			Months Ended		Ended
			June 30,		December 31,
			2014		2013
			(in thousands)
	Acquisitions (b)		$	407,255	$	¾
	Acreage purchases			107,379		137,538
	Development			512,703		938,668
	Exploration:
	Drilling			37,261		189,742
	Expense			26,092		60,384
	Stock-based compensation expense			2,375		4,025
	Gas gathering facilities:
	Development			7,371		47,086
	Subtotal			1,100,436		1,377,443
	Asset retirement obligations			5,516		76,373
	Total costs incurred		$	1,105,952	$	1,453,816
	(a)	Includes costs incurred whether capitalized or expensed.
	(b) See also Note 4 for additional information related to the Conger Exchange. Includes $134.8 million of gas gathering assets.

Acquisitions_and_Dispositions_1

Acquisitions and Dispositions - Additional Information (Detail) (USD $)

3 Months Ended

6 Months Ended

1 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

0 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2013

Jun. 30, 2014

Apr. 30, 2013

Jun. 30, 2013

Jun. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Apr. 30, 2014

Apr. 30, 2014

Jun. 30, 2014

Jun. 30, 2014

Miscallaneous Proved Property

Delaware and Permian Basin

Miscellaneous Proved and Unproved Properties

Nora Gathering, LLC

Nora Gathering, LLC

Conger Exchange Transaction

Conger Exchange Transaction

Conger Exchange Transaction

Conger Exchange Transaction

Conger Exchange Transaction

EQT Corporation

EQT Corporation

EQT Corporation

Significant Acquisitions And Disposals [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash proceeds from sale of assets

'

'

'

'

'

'

'

'

'

$145,000,000

'

$145,000,000

'

'

Sale and exchange transaction, closing date

'

'

'

'

'

'

'

'

'

'

'

'

'

16-Jun-14

Gain (loss) on sale of assets

282,064,000

83,287,000

281,711,000

83,121,000

1,600,000

83,300,000

3,700,000

10,000,000

10,000,000

'

'

275,200,000

'

'

Selling expenses for property sale

'

'

'

'

'

4,200,000

'

'

'

'

'

'

5,000,000

5,000,000

Carrying amount of assets prior to exchange

'

'

'

'

'

'

'

'

'

'

271,800,000

'

'

'

Percentage of ownership interest, acquired

'

'

'

'

'

'

'

50.00%

50.00%

'

'

'

'

'

Percentage of ownership interest with Company

'

'

'

'

'

'

'

50.00%

50.00%

'

'

'

'

'

Trade receivables relating to acquisition

'

'

'

'

'

'

'

5,546,000

5,546,000

'

'

'

'

'

Recognized revenue from sale of property interests acquired

'

'

'

'

'

'

'

'

'

2,800,000

'

'

'

'

Net operating income

'

'

'

'

'

'

'

'

'

2,100,000

'

'

'

'

Proceeds from sale of oil and gas

'

'

'

'

$1,100,000

$275,000,000

$25,200,000

'

'

'

'

'

'

'

Acquisitions_and_Dispositions_2

Acquisitions and Dispositions - Summary of Fair Value of Assets Acquired and Liabilities Assumed in Transaction (Detail) (Conger Exchange Transaction, USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Business Acquisition [Line Items]	'
Fair value of net assets transferred	$550,273
Cash	145,000
Other liabilities-firm transportation contract	-12,092
Asset retirement obligations	-11,927
Fair value of net assets acquired and liabilities assumed	550,273
Natural Gas and Oil Properties	'
Business Acquisition [Line Items]	'
Properties	407,255
Transportation and field assets	'
Business Acquisition [Line Items]	'
Properties	7,793
Nora Gathering, LLC	'
Business Acquisition [Line Items]	'
Working capital – Nora Gathering, LLC	$14,244

Income_Taxes_Income_Tax_Expens

Income Taxes - Income Tax Expense from Continuing Operations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Taxes [Line Items]	'	'	'	'
Income tax expense	$117,976	$97,494	$136,933	$50,314
Effective tax rate	40.80%	40.40%	40.20%	42.40%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Income Taxes [Line Items]	'	'
Statutory Tax Rate	35.00%	35.00%

Income_Loss_Per_Common_Share_C

Income (Loss) Per Common Share - Computations of Basic and Diluted (Loss) Income Per Common Share (Detail) (USD $)	3 Months Ended				6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Net income, as reported	$171,389		$143,983		$203,910		$68,373
Participating basic earnings	-2,868	[1]	-2,335	[1]	-3,460	[1]	-1,124	[1]
Basic net income attributed to common shareholders	168,521		141,648		200,450		67,249
Reallocation of participating earnings	15	[1]	12	[1]	19	[1]	5	[1]
Diluted net income attributed to common shareholders	$168,536		$141,660		$200,469		$67,254
Net income per common share:	'		'		'		'
Basic	$1.04		$0.88		$1.24		$0.42
Diluted	$1.04		$0.88		$1.24		$0.42
[1]	Restricted Stock Awards represent participating securities because they participate in nonforfeitable dividends or distributions with common equity owners. Income allocable to participating securities represents the distributed and undistributed earnings attributable to the participating securities. Participating securities, however, do not participate in undistributed net losses.

Income_Loss_Per_Common_Share_B

Income (Loss) Per Common Share - Basic Weighted Average Common Shares Outstanding to Diluted Weighted Average Common Shares Outstanding (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Denominator:	'	'	'	'
Weighted average common shares outstanding – basic	161,909	160,565	161,354	160,346
Effect of dilutive securities:	'	'	'	'
Director and employee stock options and SARs	904	849	969	877
Weighted average common shares outstanding – diluted	162,813	161,414	162,323	161,223

Income_Loss_Per_Common_Share_A

Income (Loss) Per Common Share - Additional Information (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Weighted average number of shares, Restricted stock liability awards	2,800,000	2,600,000	2,800,000	2,700,000
Stock Appreciation Rights (SARs)	'	'	'	'
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]	'	'	'	'
Stock excluded from earning per share calculation	'	161,000	'	252,000

Suspended_Exploratory_Well_Cos2

Suspended Exploratory Well Costs - Suspended Exploratory Well Costs (Detail) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
	Project	Project
Extractive Industries [Abstract]	'	'
Balance at beginning of period	$6,964	$57,360
Additions to capitalized exploratory well costs pending the determination of proved reserves	44,472	39,832
Reclassifications to wells, facilities and equipment based on determination of proved reserves	'	-84,840
Capitalized exploratory well costs charged to expense	'	'
Divested wells	'	-5,388
Balance at end of period	51,436	6,964
Less exploratory well costs that have been capitalized for a period of one year or less	-44,472	'
Capitalized exploratory well costs that have been capitalized for a period greater than one year	$6,964	$6,964
Number of projects that have exploratory well costs that have been capitalized for a period greater than one year	1	1

Suspended_Exploratory_Well_Cos3

Suspended Exploratory Well Costs - Additional Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Well
Projects With Exploratory Well Costs Capitalized For More Than One Year [Line Items]	'	'
Capitalized exploratory well costs that have been capitalized for a period greater than one year	$6,964	$6,964
Number of wells waiting on pipeline	1	'

Suspended_Exploratory_Well_Cos4

Suspended Exploratory Well Costs - Aging of Capitalized Exploratory Well Costs Suspended more than One Year (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Projects With Exploratory Well Costs Capitalized For More Than One Year [Line Items]	'	'
Capitalized exploratory well costs that have been capitalized for a period greater than one year	$6,964	$6,964
2013	'	'
Projects With Exploratory Well Costs Capitalized For More Than One Year [Line Items]	'	'
Capitalized exploratory well costs that have been capitalized for a period greater than one year	110	'
2012	'	'
Projects With Exploratory Well Costs Capitalized For More Than One Year [Line Items]	'	'
Capitalized exploratory well costs that have been capitalized for a period greater than one year	6,801	'
2011	'	'
Projects With Exploratory Well Costs Capitalized For More Than One Year [Line Items]	'	'
Capitalized exploratory well costs that have been capitalized for a period greater than one year	$53	'

Indebtedness_Additional_Inform

Indebtedness - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Debt Instrument [Line Items]	'	'	'	'
Interest capitalized during the period	$0	$0	$0	$0

Indebtedness_Debt_Outstanding_

Indebtedness - Debt Outstanding (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Bank debt	$480,000	$500,000
Subordinated notes	2,350,000	2,640,516
Total debt	2,830,000	3,140,516
8.00% Senior Subordinated notes due 2019	'	'
Debt Instrument [Line Items]	'	'
Subordinated notes	'	290,516
6.75% Senior Subordinated notes due 2020	'	'
Debt Instrument [Line Items]	'	'
Subordinated notes	500,000	500,000
5.75% Senior Subordinated notes due 2021	'	'
Debt Instrument [Line Items]	'	'
Subordinated notes	500,000	500,000
5.00% Senior Subordinated notes due 2022	'	'
Debt Instrument [Line Items]	'	'
Subordinated notes	600,000	600,000
5.00% Senior Subordinated notes due 2023	'	'
Debt Instrument [Line Items]	'	'
Subordinated notes	$750,000	$750,000

Indebtedness_Debt_Outstanding_1

Indebtedness - Debt Outstanding (Parenthetical) (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Bank debt percentage	1.90%	1.90%
8.00% Senior Subordinated notes due 2019	'	'
Debt Instrument [Line Items]	'	'
Interest rate on senior subordinated notes	8.00%	8.00%
Discount on Senior Subordinated notes	'	9,484
6.75% Senior Subordinated notes due 2020	'	'
Debt Instrument [Line Items]	'	'
Interest rate on senior subordinated notes	6.75%	6.75%
5.75% Senior Subordinated notes due 2021	'	'
Debt Instrument [Line Items]	'	'
Interest rate on senior subordinated notes	5.75%	5.75%
5.00% Senior Subordinated notes due 2022	'	'
Debt Instrument [Line Items]	'	'
Interest rate on senior subordinated notes	5.00%	5.00%
5.00% Senior Subordinated notes due 2023	'	'
Debt Instrument [Line Items]	'	'
Interest rate on senior subordinated notes	5.00%	5.00%

Indebtedness_Bank_Debt_Additio

Indebtedness - Bank Debt - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Apr. 03, 2014	Dec. 31, 2013
	CommercialBank		CommercialBank
Debt Instrument [Line Items]	'	'	'	'	'	'
Bank Credit facility, Facility amount	$1,750,000,000	'	$1,750,000,000	'	$1,750,000,000	'
Bank Credit facility, Borrowing base	2,000,000,000	'	2,000,000,000	'	2,000,000,000	'
Percentage holding of commercial banks, Maximum	9.00%	'	9.00%	'	'	'
Number of commercial banks included in current bank group	28	'	28	'	'	'
Notice period for increase in facility amount	'	'	'20 days	'	'	'
Bank debt	480,000,000	'	480,000,000	'	'	500,000,000
Undrawn letters of credit	131,000,000	'	131,000,000	'	'	'
Borrowing capacity available under the facility amount	$1,100,000,000	'	$1,100,000,000	'	'	'
Maturity date of loan	'	'	18-Feb-16	'	'	'
Weighted average interest rate on the bank credit facility	2.10%	2.20%	2.10%	2.10%	'	'
Commitment fee	'	'	0.38%	'	'	'
Alternate Base Rate	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Minimum range of base rate	'	'	0.50%	'	'	'
Maximum range of base rate	'	'	1.50%	'	'	'
Interest rate margin	'	'	0.75%	'	'	'
LIBOR Rate	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Minimum range of base rate	'	'	1.50%	'	'	'
Maximum range of base rate	'	'	2.50%	'	'	'
Interest rate margin	'	'	1.75%	'	'	'
Minimum	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Annual rate of commitment fee paid on the undrawn balance	'	'	0.38%	'	'	'
Maximum	'	'	'	'	'	'
Debt Instrument [Line Items]	'	'	'	'	'	'
Annual rate of commitment fee paid on the undrawn balance	'	'	0.50%	'	'	'

Indebtedness_Senior_Subordinat

Indebtedness - Senior Subordinated Notes and Early Extinguishment of Debt - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			0 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	27-May-14
					Subordinated Debt	8.0% Senior Subordinated notes due 2019
Debt Instrument [Line Items]	'	'	'	'	'	'
Maximum redemption price of notes as percentage of principal amount	'	'	'	'	101.00%	104.00%
Announced call for redemption amount of debt	'	'	'	'	'	$300,000,000
Debt instrument, redemption description	'	'	'	'	'	'On May 27, 2014, we announced a call for the redemption of $300.0 million of our outstanding 8.0% senior subordinated notes due 2019 at 104.0% of par plus accrued and unpaid interest, which were redeemed on June 26, 2014.
Loss on early extinguishment of debt	$24,596,000	$12,280,000	$24,596,000	$12,280,000	'	'

Indebtedness_Guarantees_and_De

Indebtedness - Guarantees and Debt Covenants and Maturity - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014
Debt Instrument [Line Items]	'
Percentage owned in subsidiaries	100.00%
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 debt to EBITDAX (as defined in the credit agreement) of no greater than 4.25 to 1.0 and a current ratio (as defined in the credit agreement) of no less than 1.0 to 1.0. We were in compliance with our covenants under the bank credit facility at June 30, 2014. 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 June 30, 2014, we are in compliance with these covenants.
Maximum	'
Debt Instrument [Line Items]	'
Ratio of debt to EBITDAX	4.25
Minimum	'
Debt Instrument [Line Items]	'
Current ratio	1

Asset_Retirement_Obligations_A

Asset Retirement Obligations - Asset Retirement Obligations (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Asset Retirement Obligation [Abstract]	'	'
Beginning of period	$230,077	'
Liabilities incurred	3,854	'
Acquisitions	11,927	'
Disposition of wells	-12,057	'
Liabilities settled	-2,142	'
Change in estimate	1,777	'
Accretion expense	7,370	'
End of period	240,806	'
Less current portion	-5,037	-5,037
Long-term asset retirement obligations	$235,769	'

Capital_Stock_Additional_Infor

Capital Stock - Additional Information (Detail)	Jun. 30, 2014	Dec. 31, 2013
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)	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'	'
Beginning balance	163,342,894	162,514,098
Public offering	4,560,000	'
SARs exercised	188,305	278,916
Restricted stock granted	266,453	401,122
Restricted stock units vested	237,620	119,480
Treasury shares issued	15,336	29,278
Ending balance	168,610,608	163,342,894

Derivative_Activities_Addition

Derivative Activities - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative [Line Items]	'	'	'	'
Unrealized pre-tax derivative gain recorded in AOCI	'	'	$3,100,000	'
Unrealized after tax derivative gain recorded in AOCI	'	'	1,900,000	'
Gain (Loss) Recognized in Income (Ineffective Portion)	0	'	0	-2,891,000
Unrealized net gains, reclassify into earnings	'	'	'	3,200,000
Unrealized pre-tax derivative gain expected to be reclassified into earnings	'	'	3,100,000	'
Designated as Hedging Instrument	'	'	'	'
Derivative [Line Items]	'	'	'	'
Gains (Losses) in oil and gas sales related to settled hedging transactions	4,900,000	30,500,000	7,100,000	67,000,000
Not Designated as Hedging Instrument	'	'	'	'
Derivative [Line Items]	'	'	'	'
Unrealized pre-tax derivative gain recorded in AOCI	'	'	103,600,000	'
Accumulated other comprehensive income, unrealized net gains, after tax	'	'	63,200,000	'
Derivatives Excluding Basis Swaps	'	'	'	'
Derivative [Line Items]	'	'	'	'
Derivative assets liabilities at fair value net	68,500,000	'	68,500,000	'
Basis Swaps	'	'	'	'
Derivative [Line Items]	'	'	'	'
Derivative assets liabilities at fair value net	$8,700,000	'	$8,700,000	'
Volume Hedged	215,693	'	215,693	'

Derivative_Activities_Derivati

Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Detail)	Jun. 30, 2014
	MMBTU
Natural Gas 2014 | Collars	'
Derivative [Line Items]	'
Volume Hedged	447,500
Average floor price	3.84
Average cap price	4.48
Natural Gas 2014 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	260,000
Average hedge price	4.18
Natural Gas 2015 | Collars	'
Derivative [Line Items]	'
Volume Hedged	145,000
Average floor price	4.07
Average cap price	4.56
Natural Gas 2015 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	287,432
Average hedge price	4.22
Natural Gas 2016 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	90,000
Average hedge price	4.21
Crude Oil 2014 | Collars	'
Derivative [Line Items]	'
Volume Hedged	2,000
Average floor price	85.55
Average cap price	100
Crude Oil 2014 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	9,500
Average hedge price	94.35
Crude Oil 2015 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	9,626
Average hedge price	90.57
Crude Oil 2016 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	501
Average hedge price	91.1
NGLs (C3 - Propane) 2014 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	12,000
Average hedge price	1.02
NGLs (C3 - Propane) 2015 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	1,000
Average hedge price	1.1
NGLs (NC4 - Normal Butane) 2014 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	4,000
Average hedge price	1.34
NGLs (C5 - Natural Gasoline) 2014 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	3,500
Average hedge price	2.17
NGLs (C5 - Natural Gasoline) 2015 | Swaps	'
Derivative [Line Items]	'
Volume Hedged	500
Average hedge price	2.14

Derivative_Activities_Schedule

Derivative Activities - Schedule of Additional Information Related to Master Netting Arrangements with Derivative Counterparties (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	$31,102	$33,360
Gross Amounts Offset in the Balance Sheet	-20,879	-19,706
Net Amounts of Assets Presented in the Balance Sheet	10,223	13,654
Gross Amounts of Recognized (Liabilities)	-90,945	-45,929
Gross Amounts Offset in the Balance Sheet	20,879	19,706
Net Amounts of (Liabilities) Presented in the Balance Sheet	-70,066	-26,223
Natural gas | Swaps	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	4,967	4,240
Gross Amounts Offset in the Balance Sheet	-1,606	-1,218
Net Amounts of Assets Presented in the Balance Sheet	3,361	3,022
Gross Amounts of Recognized (Liabilities)	-19,095	-4,790
Gross Amounts Offset in the Balance Sheet	1,606	1,218
Net Amounts of (Liabilities) Presented in the Balance Sheet	-17,489	-3,572
Natural gas | Collars	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	3,594	16,057
Gross Amounts Offset in the Balance Sheet	-3,826	-7,671
Net Amounts of Assets Presented in the Balance Sheet	-232	8,386
Gross Amounts of Recognized (Liabilities)	-15,750	-13,345
Gross Amounts Offset in the Balance Sheet	3,826	7,671
Net Amounts of (Liabilities) Presented in the Balance Sheet	-11,924	-5,674
Natural gas | Basis Swaps	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	19,606	7,686
Gross Amounts Offset in the Balance Sheet	-9,559	-7,686
Net Amounts of Assets Presented in the Balance Sheet	10,047	'
Gross Amounts of Recognized (Liabilities)	-10,934	-3,756
Gross Amounts Offset in the Balance Sheet	9,559	7,686
Net Amounts of (Liabilities) Presented in the Balance Sheet	-1,375	3,930
Crude oil | Swaps	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	84	3,567
Gross Amounts Offset in the Balance Sheet	-2,305	-1,321
Net Amounts of Assets Presented in the Balance Sheet	-2,221	2,246
Gross Amounts of Recognized (Liabilities)	-36,628	-4,711
Gross Amounts Offset in the Balance Sheet	2,305	1,321
Net Amounts of (Liabilities) Presented in the Balance Sheet	-34,323	-3,390
Crude oil | Collars	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized (Liabilities)	-1,693	-398
Net Amounts of (Liabilities) Presented in the Balance Sheet	-1,693	-398
Swap NGLs (Natural Gasoline) | C3 swaps	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	1,538	826
Gross Amounts Offset in the Balance Sheet	-2,160	-826
Net Amounts of Assets Presented in the Balance Sheet	-622	'
Gross Amounts of Recognized (Liabilities)	-6,246	-18,172
Gross Amounts Offset in the Balance Sheet	2,160	826
Net Amounts of (Liabilities) Presented in the Balance Sheet	-4,086	-17,346
Swap NGLs (Natural Gasoline) | NC4 swaps	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	1,227	863
Gross Amounts Offset in the Balance Sheet	-1,227	-863
Gross Amounts of Recognized (Liabilities)	-120	-757
Gross Amounts Offset in the Balance Sheet	1,227	863
Net Amounts of (Liabilities) Presented in the Balance Sheet	1,107	106
Swap NGLs (Natural Gasoline) | C5 swaps	'	'
Derivative [Line Items]	'	'
Gross Amounts of Recognized Assets	86	121
Gross Amounts Offset in the Balance Sheet	-196	-121
Net Amounts of Assets Presented in the Balance Sheet	-110	'
Gross Amounts of Recognized (Liabilities)	-479	'
Gross Amounts Offset in the Balance Sheet	196	121
Net Amounts of (Liabilities) Presented in the Balance Sheet	($283)	$121

Derivative_Activities_Effects_

Derivative Activities - Effects of Cash Flow Hedges and Other Hedges on Accumulated Other Comprehensive Income (Detail) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Derivative Instruments Gain Loss [Line Items]	'		'		'		'
Change in unrealized deferred hedging gains, tax effect	'		'		'		$2,687
Change in Hedge Derivative Fair value, effects of Cash flow hedges on accumulated other comprehensive income (loss) total	'		'		'		-4,203	[1]
Realized Gain Reclassified from AOCI into Revenue, Income taxes	-1,866	[2]	-12,252	[2]	-2,791	[2]	-27,376	[2]
Realized gain on hedge derivative contract settlements reclassified into earnings from other comprehensive income, net of taxes	3,046	[2]	19,163	[2]	4,286	[2]	42,818	[2]
Swaps	'		'		'		'
Derivative Instruments Gain Loss [Line Items]	'		'		'		'
Change in Hedge Derivative Fair Value	'		'		'		125
Realized Gain Reclassified from OCI into Revenue	1,052	[2]	3,875	[2]	1,889	[2]	11,922	[2]
Collars	'		'		'		'
Derivative Instruments Gain Loss [Line Items]	'		'		'		'
Change in Hedge Derivative Fair Value	'		'		'		-7,015
Realized Gain Reclassified from OCI into Revenue	$3,860	[2]	$27,540	[2]	$5,188	[2]	$58,272	[2]
[1]	Amounts are net of income tax benefit of $2,687 for the six months ended June 30, 2013.
[2]	For realized gains upon derivative contract settlement, the reduction in AOCI is offset by an increase in revenues, NGLs and oil sales. For realized losses upon derivative contract settlement, the increase in AOCI is offset by a decrease in revenues. See additional discussion above regarding the discontinuance of hedge accounting.

Derivative_Activities_Effects_1

Derivative Activities - Effects of Non-Hedge Derivatives on Consolidated Statement of Operations (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Derivative Financial Instruments [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income (Non-hedge Derivatives)	($24,109)	$137,760	($170,959)	$40,776
Gain (Loss) Recognized in Income (Ineffective Portion)	0	'	0	-2,891
Derivative Fair Value Income (Loss)	-24,109	137,760	-170,959	37,885
Swaps	'	'	'	'
Derivative Financial Instruments [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income (Non-hedge Derivatives)	-38,521	65,003	-82,593	21,927
Gain (Loss) Recognized in Income (Ineffective Portion)	'	'	'	-1,995
Derivative Fair Value Income (Loss)	-38,521	65,003	-82,593	19,932
Re-purchased swaps	'	'	'	'
Derivative Financial Instruments [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income (Non-hedge Derivatives)	'	-1,663	'	-478
Derivative Fair Value Income (Loss)	'	-1,663	'	-478
Collars	'	'	'	'
Derivative Financial Instruments [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income (Non-hedge Derivatives)	1,032	74,420	-38,116	19,417
Gain (Loss) Recognized in Income (Ineffective Portion)	'	'	'	-896
Derivative Fair Value Income (Loss)	1,032	74,420	-38,116	18,521
Basis swaps	'	'	'	'
Derivative Financial Instruments [Line Items]	'	'	'	'
Gain (Loss) Recognized in Income (Non-hedge Derivatives)	13,380	'	-50,250	-90
Derivative Fair Value Income (Loss)	$13,380	'	($50,250)	($90)

Fair_Value_Measurements_Fair_V

Fair Value Measurements - Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value (Detail) (Fair Value, Measurements, Recurring, USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Trading securities held in the deferred compensation plans	$68,129	$67,766
Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	-54,665	-18,812
Collars	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	-13,849	2,314
Basis Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	8,672	3,929
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	68,129	67,766
Fair Value, Inputs, Level 1 | Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	'	'
Fair Value, Inputs, Level 1 | Collars	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	'	'
Fair Value, Inputs, Level 1 | Basis Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	'	'
Fair Value, Inputs, Level 2	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Trading securities held in the deferred compensation plans	'	'
Fair Value, Inputs, Level 2 | Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	-54,665	-18,812
Fair Value, Inputs, Level 2 | Collars	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	-13,849	2,314
Fair Value, Inputs, Level 2 | Basis Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	6,319	3,381
Fair Value, Inputs, Level 3	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Trading securities held in the deferred compensation plans	'	'
Fair Value, Inputs, Level 3 | Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	'	'
Fair Value, Inputs, Level 3 | Collars	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	'	'
Fair Value, Inputs, Level 3 | Basis Swaps	'	'
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'
Derivative assets liabilities at fair value net	$2,353	$548

Fair_Value_Measurements_Additi

Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014
			Lenders			Surface Property	Surface Property	Surface Property	Basis Swaps
			Company			Fair Value, Measurements, Nonrecurring	Fair Value, Measurements, Nonrecurring	Fair Value, Measurements, Nonrecurring	Fair Value, Inputs, Level 3
									Swaps
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'	'	'	'	'	'
Number of natural gas basis swap	'	'	'	'	'	'	'	'	4
Interest and dividends	$103,000	$629,000	$171,000	$668,000	'	'	'	'	'
Mark-to-market gain (loss)	2,100,000	-1,000,000	2,600,000	586,000	'	'	'	'	'
Impairment on oil and gas properties	25,000,000	'	25,000,000	'	'	'	'	'	'
Impairment	24,991,000	741,000	24,991,000	741,000	'	741,000	741,000	741,000	'
Allowance for uncollectible receivables	2,700,000	'	2,700,000	'	2,500,000	'	'	'	'
Number of financial institutions included in counter parties	'	'	15	'	'	'	'	'	'
Number of secured lenders not in banking credit facility	'	'	2	'	'	'	'	'	'
Net derivative liabilities	$2,300,000	'	$2,300,000	'	'	'	'	'	'

Fair_Value_Measurements_Value_

Fair Value Measurements - Value of Assets Measured at Fair Value on Non Recurring Basis (Detail) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013	Dec. 31, 2013
					Fair Value, Measurements, Nonrecurring	Fair Value, Measurements, Nonrecurring	Fair Value, Measurements, Nonrecurring	Fair Value, Measurements, Nonrecurring	Fair Value, Measurements, Nonrecurring
					Natural Gas and Oil Properties	Natural Gas and Oil Properties	Surface Property	Surface Property	Surface Property
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]	'	'	'	'	'	'	'	'	'
Fair Value	'	'	'	'	$18,086,000	$18,086,000	$5,550,000	$5,550,000	'
Impairment	$24,991,000	$741,000	$24,991,000	$741,000	$24,991,000	$24,991,000	$741,000	$741,000	$741,000

Fair_Value_Measurements_Carryi

Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Detail) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
(Liabilities):	'		'
Bank credit facility	($480,000)		($500,000)
Subordinated debt	-2,350,000		-2,640,516
8.00% Senior Subordinated notes due 2019	'		'
(Liabilities):	'		'
Subordinated debt	'		-290,516
6.75% Senior Subordinated notes due 2020	'		'
(Liabilities):	'		'
Subordinated debt	-500,000		-500,000
5.75% Senior Subordinated notes due 2021	'		'
(Liabilities):	'		'
Subordinated debt	-500,000		-500,000
5.00% Senior Subordinated notes due 2022	'		'
(Liabilities):	'		'
Subordinated debt	-600,000		-600,000
5.00% Senior Subordinated notes due 2023	'		'
(Liabilities):	'		'
Subordinated debt	-750,000		-750,000
Carrying Value	'		'
Assets:	'		'
Commodity swaps, collars and basis swaps	10,223		13,654
Marketable securities	68,129	[1]	67,766	[1]
(Liabilities):	'		'
Commodity swaps, collars and basis swaps	-70,066		-26,223
Bank credit facility	-480,000	[2]	-500,000	[2]
Deferred compensation plan	-276,868	[3]	-271,738	[3]
Carrying Value | 8.00% Senior Subordinated notes due 2019	'		'
(Liabilities):	'		'
Subordinated debt	'		-290,516	[2]
Carrying Value | 6.75% Senior Subordinated notes due 2020	'		'
(Liabilities):	'		'
Subordinated debt	-500,000	[2]	-500,000	[2]
Carrying Value | 5.75% Senior Subordinated notes due 2021	'		'
(Liabilities):	'		'
Subordinated debt	-500,000	[2]	-500,000	[2]
Carrying Value | 5.00% Senior Subordinated notes due 2022	'		'
(Liabilities):	'		'
Subordinated debt	-600,000	[2]	-600,000	[2]
Carrying Value | 5.00% Senior Subordinated notes due 2023	'		'
(Liabilities):	'		'
Subordinated debt	-750,000	[2]	-750,000	[2]
Fair Value	'		'
Assets:	'		'
Commodity swaps, collars and basis swaps	10,223		13,654
Marketable securities	68,129	[1]	67,766	[1]
(Liabilities):	'		'
Commodity swaps, collars and basis swaps	-70,066		-26,223
Bank credit facility	-480,000	[2]	-500,000	[2]
Deferred compensation plan	-276,868	[3]	-271,738	[3]
Fair Value | 8.00% Senior Subordinated notes due 2019	'		'
(Liabilities):	'		'
Subordinated debt	'		-319,500	[2]
Fair Value | 6.75% Senior Subordinated notes due 2020	'		'
(Liabilities):	'		'
Subordinated debt	-539,375	[2]	-541,250	[2]
Fair Value | 5.75% Senior Subordinated notes due 2021	'		'
(Liabilities):	'		'
Subordinated debt	-540,000	[2]	-530,625	[2]
Fair Value | 5.00% Senior Subordinated notes due 2022	'		'
(Liabilities):	'		'
Subordinated debt	-636,000	[2]	-588,750	[2]
Fair Value | 5.00% Senior Subordinated notes due 2023	'		'
(Liabilities):	'		'
Subordinated debt	($798,750)	[2]	($732,188)	[2]
[1]	Marketable securities, which are held in our deferred compensation plans, are actively traded on major exchanges. Refer to Note 13 for additional information.
[2]	The book value of our bank debt approximates fair value because of its floating rate structure. The fair value of our senior subordinated notes is based on end of period market quotes which are Level 2 inputs. Refer to Note 8 for additional information.
[3]	The fair value of our deferred compensation plan is updated on the closing price on the balance sheet date which is a Level 1 input.

Fair_Value_Measurements_Carryi1

Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Parenthetical) (Detail)	Jun. 30, 2014	Dec. 31, 2013
8.00% Senior Subordinated notes due 2019	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Interest rate on senior subordinated notes	8.00%	8.00%
6.75% Senior Subordinated notes due 2020	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Interest rate on senior subordinated notes	6.75%	6.75%
5.75% Senior Subordinated notes due 2021	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Interest rate on senior subordinated notes	5.75%	5.75%
5.00% Senior Subordinated notes due 2022	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Interest rate on senior subordinated notes	5.00%	5.00%
5.00% Senior Subordinated notes due 2023	'	'
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]	'	'
Interest rate on senior subordinated notes	5.00%	5.00%

StockBased_Compensation_Plans_1

Stock-Based Compensation Plans - Additional Information (Detail)	6 Months Ended		3 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
	Stock Appreciation Rights (SARs)	Stock Appreciation Rights (SARs)	Performance Share Unit (PSU)
		Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Vesting period	'3 years	'	'3 years
Expiration term of stock units	'	'5 years	'

StockBased_Compensation_Plans_2

Stock-Based Compensation Plans - Allocation of Stock-Based Compensation by Functional Category (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total	$24,985	$15,449	$39,122	$27,735
Operating Expense	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total	1,937	696	2,789	1,357
Brokered Natural Gas And Marketing Expense	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total	1,130	530	1,658	779
Exploration Expense	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total	1,222	960	2,375	2,030
General and Administrative Expense	'	'	'	'
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]	'	'	'	'
Total	$20,696	$13,263	$32,300	$23,569

StockBased_Compensation_Plans_3

Stock-Based Compensation Plans - Additional Information 1 (Detail)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
	Plans	Stock Appreciation Rights (SARs)	Stock Appreciation Rights (SARs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'
Active equity-based stock plans	2	'	'
Number of stock option outstanding	'	2,006,306	2,582,074

StockBased_Compensation_Plans_4

Stock-Based Compensation Plans - SARs Activity (Detail) (Stock Appreciation Rights (SARs), USD $)	6 Months Ended
	Jun. 30, 2014
Stock Appreciation Rights (SARs)	'
Schedule Of Stock Option Activity [Line Items]	'
Beginning Balance, Shares	2,582,074
Granted, Shares	1,104
Exercised, Shares	-576,806
Expired/forfeited, Shares	-66
Ending Balance, Shares	2,006,306
Beginning Balance, Weighted Average Exercise Price	$56.36
Granted, Weighted Average Exercise Price	$81.74
Exercised, Weighted Average Exercise Price	$45.17
Expired/forfeited, Weighted Average Exercise Price	$46.44
Ending Balance, Weighted Average Exercise Price	$59.59

StockBased_Compensation_Plans_5

Stock-Based Compensation Plans - Weighted Average Grant Date Fair Value of SARs (Detail) (Stock Appreciation Rights (SARs), USD $)	6 Months Ended
	Jun. 30, 2014
Stock Appreciation Rights (SARs)	'
Schedule Of Assumptions Used To Estimate Fair Value Of Stock Based Compensation [Line Items]	'
Weighted average exercise price per share	$81.74
Expected annual dividends per share	0.20%
Expected life in years	'4 years 3 months 18 days
Expected volatility	33.00%
Risk-free interest rate	1.40%
Weighted average grant date fair value	$23.17

StockBased_Compensation_Plans_6

Stock-Based Compensation Plans - PSUA Activity (Detail) (Performance Shares, USD $)	6 Months Ended
	Jun. 30, 2014
Performance Shares	'
Summary of Performance Share Unit Awards outstanding, Number of Units	'
Outstanding, Beginning Balance	'	[1]
Units granted	227,929	[1]
Units vested	-53,792	[1],[2]
Outstanding, Ending Balance	174,137	[1]
Summary of Performance Share Unit Awards outstanding, Weighted Average Grant Date Fair Value	'
Outstanding, Beginning Balance	'
Weighted average grant date fair value	$86.14
Units vested	$86.40	[2]
Outstanding, Ending Balance	$86.06
[1]	Amounts granted reflect the number of performance units granted. The actual payout of shares may 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 vesting date.
[2]	Primarily represents PSU awards granted to our prior executive chairman for the 2013 calendar year while he was a Range officer.

StockBased_Compensation_Plans_7

Stock-Based Compensation Plans - PSUA Activity (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2014
Minimum	'
Schedule Of Weighted Average Assumptions For Fair Values Of Stock Options [Line Items]	'
Actual payout of shares on performance units granted	0.00%
Maximum	'
Schedule Of Weighted Average Assumptions For Fair Values Of Stock Options [Line Items]	'
Actual payout of shares on performance units granted	150.00%

StockBased_Compensation_Plans_8

Stock-Based Compensation Plans - Valuation Assumptions for Grant Date Fair Value of Performance Awards (Detail) (Performance Shares, USD $)	6 Months Ended
	Jun. 30, 2014
Performance Shares	'
Schedule Of Assumptions To Estimate Fair Value For Performance Share Unit Awards [Line Items]	'
Risk-free interest rate	0.77%
Expected annual volatility	32.50%
Grant date fair value per unit	$86.14

StockBased_Compensation_Plans_9

Stock-Based Compensation Plans - Additional Information 2 (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	$24,985	$15,449	$39,122	$27,735
Equity Awards	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	'	'	14,700	9,500
Shares granted to employees	'	'	355,000	388,700
Restricted stock granted average price	'	'	$84.96	$71.05
Vesting period of shares granted to employees	'	'	'3 years	'3 years
Liability Awards	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	'	'	15,200	11,100
Restricted stock granted average price	'	'	$87.27	'
Shares granted to employees and directors	'	'	207,000	406,100
Vesting period of shares granted to employees	'	'	'three-year	'three-year
Liability Awards | Employees	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Restricted stock granted average price	'	'	'	$75.45
Liability Awards | Non Employee Director	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Restricted stock granted average price	'	'	$88.47	$77.26
Shares granted to employees and directors	'	'	61,000	18,300
Performance Shares	'	'	'	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'
Stock-based compensation expense	'	'	$4,700	$0

Recovered_Sheet1

Stock-Based Compensation Plans - Restricted Stock and Restricted Stock Units Outstanding (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Equity Awards	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Outstanding, Beginning Balance	385,063
Granted	355,094
Vested	-196,227
Forfeited	-16,005
Outstanding, Ending Balance	527,925
Outstanding, Beginning Balance	$68.24
Grant date fair value per unit	$84.96
Vested	$72.11
Forfeited	$75.16
Outstanding, Ending Balance	$77.84
Liability Awards	'
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'
Outstanding, Beginning Balance	389,013
Granted	268,385
Vested	-203,227
Forfeited	-90
Outstanding, Ending Balance	454,081
Outstanding, Beginning Balance	$71.02
Grant date fair value per unit	$87.54
Vested	$75.81
Forfeited	$71.03
Outstanding, Ending Balance	$78.64

Recovered_Sheet2

Stock-Based Compensation Plans - Additional Information 3 (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data in Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]	'	'	'	'	'
Non-cash, Mark-to-market income (loss) related to deferred compensation plan	$10,519	($6,878)	$8,484	$35,482	'
Shares held in rabbi trust total	2.9	'	2.9	'	2.8
Vested shares held in rabbi trust	2.4	'	2.4	'	2.4

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information - Supplemental Cash Flow Information (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Net cash provided from operating activities included:	'	'
Income taxes paid to (refunded from) taxing authorities	$39	($119)
Interest paid	89,381	74,940
Non-cash investing and financing activities included:	'	'
Increase (decrease) in asset retirement costs capitalized	5,516	-2,385
Increase in accrued capital expenditures	$15,211	$74,428

Commitments_and_Contingencies_

Commitments and Contingencies - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014
Commitments And Contingencies Disclosure [Line Items]	'
Transportation commitments future minimum transportation fees due six months change	$775
Period of transportation commitments future minimum transportation fees due six months change	'25 years
Minimum	'
Commitments And Contingencies Disclosure [Line Items]	'
Terms of contingent transportation and gathering contracts	'5 years
Transportation and gathering commitments contingent upon construction and modification	25,000
Delivery of natural gas per day	50,000
Period for delivery of natural gas	'5 years
Delivery of ethane per day	5,000
Period of delivery of ethane	'3 years
Maximum	'
Commitments And Contingencies Disclosure [Line Items]	'
Terms of contingent transportation and gathering contracts	'20 years
Transportation and gathering commitments contingent upon construction and modification	400,000
Delivery of natural gas per day	80,000
Period for delivery of natural gas	'10 years
Delivery of ethane per day	10,000
Period of delivery of ethane	'15 years

Capitalized_Costs_and_Accumula2

Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Detail) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Natural gas and oil properties:	'		'
Properties subject to depletion	$8,843,288	[1]	$8,225,859	[1]
Unproved properties	888,722	[1]	807,022	[1]
Total	9,732,010	[1]	9,032,881	[1]
Accumulated depreciation, depletion and amortization	-2,336,666	[1]	-2,274,444	[1]
Net capitalized costs	$7,395,344	[1]	$6,758,437	[1]
[1]	Includes capitalized asset retirement costs and the associated accumulated amortization

Costs_Incurred_for_Property_Ac2

Costs Incurred for Property Acquisition, Exploration and Development - Costs Incurred for Property Acquisition, Exploration and Development (Detail) (USD $)	6 Months Ended		12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items]	'		'
Acquisitions	$407,255	[1],[2]	'
Acreage purchases	107,379	[1]	137,538	[1]
Development	512,703	[1]	938,668	[1]
Gas gathering facilities:	'		'
Development	7,371	[1]	47,086	[1]
Subtotal	1,100,436	[1]	1,377,443	[1]
Asset retirement obligations	5,516	[1]	76,373	[1]
Total costs incurred	1,105,952	[1]	1,453,816	[1]
Drilling	'		'
Exploration:	'		'
Exploration costs incurred	37,261	[1]	189,742	[1]
Expense	'		'
Exploration:	'		'
Exploration costs incurred	26,092	[1]	60,384	[1]
Stock-based compensation expense	'		'
Exploration:	'		'
Exploration costs incurred	$2,375	[1]	$4,025	[1]
[1]	Includes costs incurred whether capitalized or expensed.
[2]	See also Note 4 for additional information related to the Conger Exchange. Includes $134.8 million of gas gathering assets.

Costs_Incurred_for_Property_Ac3

Costs Incurred for Property Acquisition, Exploration and Development - Costs Incurred for Property Acquisition, Exploration and Development (Parenthetical) (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items]	'
Costs incurred to acquire gas gathering assets	$407,255	[1],[2]
Gas Gathering Assets	'
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items]	'
Costs incurred to acquire gas gathering assets	$134,800
[1]	Includes costs incurred whether capitalized or expensed.
[2]	See also Note 4 for additional information related to the Conger Exchange. Includes $134.8 million of gas gathering assets.