Antero Resources (AR) 10-Q7 May 142014 Q1 Quarterly reportFinancial data

Company Profile

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
Document and Entity Information	Mar. 31, 2014	6-May-14
Document and Entity Information	'	'
Entity Registrant Name	'ANTERO RESOURCES Corp	'
Entity Central Index Key	'0001433270	'
Document Type	'10-Q	'
Document Period End Date	31-Mar-14	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--12-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	262,049,659
Document Fiscal Period Focus	'Q1	'
Document Fiscal Year Focus	'2014	'

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:	'	'
Cash and cash equivalents	$12,580	$17,487
Accounts receivable - trade, net of allowance for doubtful accounts of $1,251 in 2013 and 2014	27,250	30,610
Notes receivable - short-term portion	1,333	2,667
Accrued revenue	145,675	96,825
Derivative instruments	130,679	183,000
Other	4,405	2,975
Total current assets	321,922	333,564
Oil and gas properties, at cost (successful efforts method):	'	'
Unproved properties	1,543,118	1,513,136
Proved properties	4,191,186	3,621,672
Fresh water distribution systems	290,132	231,684
Gathering and compression systems	713,485	584,626
Other property and equipment	26,731	15,757
Property and equipment, gross	6,764,652	5,966,875
Less accumulated depletion, depreciation, and amortization	-498,425	-407,219
Property and equipment, net	6,266,227	5,559,656
Derivative instruments	500,882	677,780
Other assets, net	45,426	42,581
Total assets	7,134,457	6,613,581
Current liabilities:	'	'
Accounts payable	428,938	370,640
Accrued liabilities	125,102	77,126
Revenue distributions payable	136,563	96,589
Deferred income tax liability	43,182	69,191
Derivative instruments	17,623	646
Other	9,398	8,037
Total current liabilities	760,806	622,229
Long-term liabilities:	'	'
Long-term debt	2,535,819	2,078,999
Deferred income tax liability	263,927	278,580
Other long-term liabilities	40,867	35,113
Total liabilities	3,601,419	3,014,921
Stockholders' Equity:	'	'
Common stock, $0.01 par value; authorized - 1,000,000,000 shares; issued and outstanding 262,049,659 shares	2,620	2,620
Preferred stock, $0.01 par value; authorized - 50,000,000 shares; none issued	'	'
Additional paid-in capital	3,431,317	3,402,180
Accumulated earnings	99,101	193,860
Total stockholders' equity	3,533,038	3,598,660
Total liabilities and equity	$7,134,457	$6,613,581

Condensed_Consolidated_Balance1

Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Condensed Consolidated Balance Sheets	'	'
Accounts receivable - trade, allowance for doubtful accounts	$1,251	$1,251
Common stock, par value (in dollars per share)	$0.01	$0.01
Common stock, authorized shares	1,000,000,000	1,000,000,000
Common stock, shares issued	262,049,659	262,049,659
Common stock, shares outstanding	262,049,659	262,049,659
Preferred stock, par value (in dollars per share)	$0.01	$0.01
Preferred stock, authorized shares	50,000,000	50,000,000
Preferred stock, shares issued	0	0

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations and Comprehensive Loss (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Revenue:	'	'
Natural gas sales	$312,336	$121,946
Natural gas liquids sales	73,928	10,572
Oil sales	24,122	877
Gathering, compression and water distribution	3,524	'
Commodity derivative fair value losses	-248,929	-71,941
Total revenue	164,981	61,454
Operating expenses:	'	'
Lease operating	4,869	1,071
Gathering, compression, processing, and transportation	92,265	40,970
Production and ad valorem taxes	21,039	8,619
Exploration	6,997	4,362
Impairment of unproved properties	1,397	1,556
Depletion, depreciation, and amortization	91,206	40,364
Accretion of asset retirement obligations	302	264
General and administrative (including stock compensation of $29,137 in 2014)	50,985	12,717
Total operating expenses	269,060	109,923
Operating loss	-104,079	-48,469
Interest expense	-31,342	-29,928
Loss before income taxes	-135,421	-78,397
Provision for income tax benefit	40,662	30,400
Net loss and comprehensive loss	($94,759)	($47,997)
Loss per common share (in dollars per share)	($0.36)	($0.18)
Loss per common share - assuming dilution (in dollars per share)	($0.36)	($0.18)

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Operations and Comprehensive Loss (Parenthetical) (USD $)	3 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Condensed Consolidated Statements of Operations and Comprehensive Loss	'	'
Stock compensation	$29,137	$365,000

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Equity (USD $)	Total	Common Stock	Additional paid-in capital	Accumulated earnings
In Thousands, unless otherwise specified	Total	Common Stock	Additional paid-in capital	Accumulated earnings
Balances at Dec. 31, 2013	$3,598,660	$2,620	$3,402,180	$193,860
Increase (Decrease) in Stockholders' Equity	'	'	'	'
Stock compensation	29,137	'	29,137	'
Net loss and comprehensive income	-94,759	'	'	-94,759
Balances at Mar. 31, 2014	$3,533,038	$2,620	$3,431,317	$99,101

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net loss	($94,759)	($47,997)
Adjustment to reconcile net loss to net cash provided by operating activities:	'	'
Depletion, depreciation, amortization, and accretion	91,508	40,628
Impairment of unproved properties	1,397	1,556
Derivative fair value losses	248,929	71,941
Cash receipts (payments) for settled derivatives	-1,071	48,131
Deferred income tax benefit	-40,662	-30,400
Stock compensation	29,137	'
Other	3,182	1,387
Changes in assets and liabilities:	'	'
Accounts receivable	3,360	-10,545
Accrued revenue	-48,850	-5,948
Other current assets	-96	11,711
Accounts payable	-5,718	-1,584
Accrued liabilities	47,976	24,290
Revenue distributions payable	39,974	7,037
Net cash provided by operating activities	274,307	110,207
Cash flows used in investing activities:	'	'
Additions to unproved properties	-60,149	-148,972
Drilling and completion costs	-496,221	-334,965
Additions to fresh water distribution systems	-60,030	-9,020
Additions to gathering and compression systems	-107,523	-55,975
Additions to other property and equipment	-7,783	-721
Change in other assets	-3,807	1,768
Net cash used in investing activities	-735,513	-547,885
Cash flows from financing activities:	'	'
Issuance of senior notes	'	231,750
Borrowings on bank credit facility, net	457,000	187,000
Payments of deferred financing costs	-701	-3,014
Other	'	7,759
Net cash provided by financing activities	456,299	423,495
Net decrease in cash and cash equivalents	-4,907	-14,183
Cash and cash equivalents, beginning of period	17,487	18,989
Cash and cash equivalents, end of period	12,580	4,806
Supplemental disclosure of cash flow information:	'	'
Cash paid during the period for interest	13,087	16,160
Supplemental disclosure of noncash investing activities:	'	'
Changes in accounts payable for additions to property and equipment	$64,016	$88,843

Organization

Organization	3 Months Ended
Organization	Mar. 31, 2014
Organization	'
Organization	'
	(1) Organization

	(a) *Business and Organization*

	Antero Resources Corporation and its consolidated subsidiaries (collectively referred to as the “Company,” “we,” or “our”) are engaged in the exploitation, development, and acquisition of natural gas, natural gas liquids (“NGLs”) and oil properties in the Appalachian Basin in West Virginia, Ohio, and Pennsylvania. We target large, repeatable resource plays where horizontal drilling and advanced fracture stimulation technologies provide the means to economically develop and produce natural gas, NGLs, and oil from unconventional formations. We also have gathering and compression and fresh water distribution operations in the Appalachian Basin. Our corporate headquarters are in Denver, Colorado.

	Our consolidated financial statements include the accounts of Antero Resources Corporation and its subsidiaries, Antero Resources Midstream LLC (“Antero Midstream”) and Antero Midstream LLC (“Midstream Operating”).

	(b) *Corporate Reorganization and Initial Public Offering*

	Prior to October 16, 2013, the Company’s predecessor, Antero Resources LLC, filed reports with the Securities and Exchange Commission. Antero Resources LLC was formed in October 2009 by members of the Company’s management team and its sponsor investors. Antero Resources LLC owned 100% of the outstanding shares of Antero Resources Appalachian Corporation, which was formed in March 2008 and renamed Antero Resources Corporation in June 2013. In connection with our initial public offering (“IPO”) completed on October 16, 2013, all of the ownership interests in Antero Resources LLC were exchanged for similar interests in a newly formed limited liability company, Antero Resources Investment LLC (“Antero Investment”), and Antero Resources LLC was merged into Antero Resources Corporation. As a result of this reorganization, Antero Investment owned 100% of the issued and outstanding 224,375,000 shares of common stock of Antero Resources Corporation prior to the IPO.

	On October 16, 2013, Antero Resources Corporation issued 37,674,659 additional shares of its common stock at $44.00 per share in the IPO, resulting in proceeds to the Company, net of underwriter discounts and expenses of the offering, of approximately $1.6 billion. Antero Investment also sold 3,409,091 shares of its common stock of Antero Resources Corporation in the IPO. The Company did not receive any of the proceeds from the sale of the shares by Antero Investment.

	In 2013, the Company formed a subsidiary, Antero Midstream. The Company owns all of the common economic interest in Antero Midstream and Antero Investment indirectly owns the special membership interest. In connection with a planned initial public offering of Antero Midstream during 2014, the Company intends to contribute its midstream assets to Antero Midstream and has entered into commercial arrangements for midstream services. The assets will be contributed to Midstream Operating, which will be contributed to Antero Midstream. The assets to be contributed consist of (i) low- and high-pressure natural gas gathering lines, (ii) oil and condensate gathering lines, (iii) fresh water distribution systems and (iv) compression facilities. The special membership interest in Antero Midstream provides Antero Investment with certain rights, including the right to cause an initial public offering of Antero Midstream as a master limited partnership (“MLP”) or similar structure. Following any such initial public offering, the special membership interest will entitle Antero Investment to own the general partner interest in the MLP, which will allow Antero Investment to manage Antero Midstream’s business and affairs. Following any such initial public offering, Antero Investment will also indirectly hold the incentive distribution rights in the MLP.

	(c) *Stock Compensation Charge in Connection with the Reorganization*

	In connection with its formation in October 2009, Antero Resources LLC issued profits interests to Antero Resources Employee Holdings LLC (“Employee Holdings”), which is owned solely by certain of our officers and employees. These profits interests provide for the participation in distributions upon liquidation events meeting certain requisite financial return thresholds. In turn, Employee Holdings issued membership interests to certain of our officers and employees. The Employee Holdings interests in Antero Resources LLC were exchanged for similar interests in Antero Investment in connection with the corporate reorganization on October 16, 2013.

	The limited liability company agreement of Antero Investment provides a mechanism by which the shares of the Company’s common stock to be allocated among the members of Antero Investment, including Employee Holdings, will be determined. As a result of the adoption of the Antero Investment LLC agreement, the satisfaction of all performance and service conditions relative to the profits interests awards held by Employee Holdings in Antero Investment became probable. Accordingly, we recognized approximately $365 million of stock compensation expense for the vested profits interests through December 31, 2013 and will recognize an additional approximate $121 million over the remaining service period. Stock compensation expense for the profits interests during the three months ended March 31, 2014 was $28.7 million. Because consideration for the profits interests awards is deemed given by Antero Investment, the charge to stock compensation expense is accounted for as a capital contribution by Antero Investment in the Company and credited to additional paid-in capital.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Mar. 31, 2014
Summary of Significant Accounting Policies	'
Summary of Significant Accounting Policies	'
	(2) Summary of Significant Accounting Policies

	(a) *Basis of Presentation*

	These consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC applicable to interim financial information and should be read in the context of the December 31, 2013 consolidated financial statements and notes thereto for a more complete understanding of the Company’s operations, financial position, and accounting policies. The December 31, 2013 consolidated financial statements have been filed with the SEC in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

	The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information, and, accordingly, do not include all of the information and footnotes required by GAAP for complete consolidated financial statements. In the opinion of management, the accompanying unaudited consolidated financial statements include all adjustments (consisting of normal and recurring accruals) considered necessary to present fairly the Company’s financial position as of March 31, 2014, and the results of its operations for the three months ended March 31, 2013 and 2014, and its cash flows for the three months ended March 31, 2013 and 2014. The Company has no items of other comprehensive income or loss; therefore, our net loss is identical to our comprehensive loss. All significant intercompany accounts and transactions have been eliminated. Operating results for the period ended March 31, 2014 are not necessarily indicative of the results that may be expected for the full year because of the impact of fluctuations in prices received for natural gas and oil, natural production declines, the uncertainty of exploration and development drilling results, and other factors.

	The Company’s exploration and production activities are accounted for under the successful efforts method.

	As of the date these financial statements were filed with the SEC, the Company completed its evaluation of potential subsequent events for disclosure and no items requiring disclosure were identified, except as described in note 11.

	(b) *Use of Estimates*

	The preparation of consolidated financial statements in conformity with generally accepted accounting principles in the United States requires management to make estimates and assumptions that affect the reported assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Changes in facts and circumstances or discovery of new information may result in revised estimates, and actual results could differ from those estimates.

	The Company’s consolidated financial statements are based on a number of significant estimates including estimates of gas and oil reserve quantities, which are the basis for the calculation of depreciation, depletion, amortization, present value of cash flows from reserves, and impairment of oil and gas properties. Reserve estimates by their nature are inherently imprecise.

	(c) *Risks and Uncertainties*

	Historically, the market for natural gas, NGLs, and oil has experienced significant price fluctuations. Prices for natural gas have been particularly volatile in recent years. The price fluctuations can result from variations in weather, levels of production in the region, availability of transportation capacity to other regions of the country, and various other factors. Increases or decreases in prices received could have a significant impact on the Company’s future results of operations.

	(d) *Cash and Cash Equivalents*

	The Company considers all liquid investments purchased with an initial maturity of three months or less to be cash equivalents. The carrying value of cash and cash equivalents approximates fair value due to the short-term nature of these instruments.

	(e) *Derivative Financial Instruments*

	In order to manage its exposure to oil and gas price volatility, the Company enters into derivative transactions from time to time, including commodity swap agreements, collar agreements, and other similar agreements relating to natural gas and oil expected to be produced. To the extent legal right of offset with a counterparty exists, the Company reports derivative assets and liabilities on a net basis. The Company has exposure to credit risk to the extent the counterparty is unable to satisfy its settlement obligation. The Company actively monitors the creditworthiness of counterparties and assesses the impact, if any, on its derivative position.

	The Company records derivative instruments on the consolidated balance sheets as either an asset or liability measured at fair value and records changes in the fair value of derivatives in current earnings as they occur. Changes in the fair value of commodity derivatives are classified as revenues.

	(f) *Income Taxes*

	The Company recognizes deferred tax assets and liabilities for temporary differences resulting from net operating loss carryforwards for income tax purposes and the differences between the financial statement and tax basis of assets and liabilities. The effect of changes in the tax laws or tax rates is recognized in income in the period such changes are enacted. Deferred tax assets are reduced by a valuation allowance, when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized.

	Unrecognized tax benefits represent potential future tax obligations for uncertain tax positions taken on previously filed tax returns that may not ultimately be sustained. The Company recognizes interest expense related to unrecognized tax benefits in interest expense and fines and penalties as income tax expense.

	(g) *Fair Value Measurements*

	FASB ASC Topic 820, Fair Value Measurements and Disclosures, clarifies the definition of fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. This guidance also relates to all nonfinancial assets and liabilities that are not recognized or disclosed on a recurring basis (e.g., those measured at fair value in a business combination, the initial recognition of asset retirement obligations, and impairments of proved oil and gas properties, and other long-lived assets). The fair value is the price that the Company estimates would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A fair value hierarchy is used to prioritize input to valuation techniques used to estimate fair value. An asset or liability subject to the fair value requirements is categorized within the hierarchy based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. The highest priority (Level 1) is given to unadjusted quoted market prices in active markets for identical assets or liabilities, and the lowest priority (Level 3) is given to unobservable inputs. Level 2 inputs are data, other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Instruments which are valued using Level 2 inputs include nonexchange traded derivatives such as over-the-counter commodity price swaps, basis swaps, and interest rate swaps. Valuation models used to measure fair value of these instruments consider various Level 2 inputs including (i) quoted forward prices for commodities, (ii) time value, (iii) quoted forward interest rates, (iv) current market prices and contractual prices for the underlying instruments, (v) risk of nonperformance by the Company and the counterparty, and (vi) other relevant economic measures.

	(h) *Industry Segments and Geographic Information*

	We have evaluated how the Company is organized and managed and have identified the following operating segments: (1) the exploration, development and production of natural gas, NGLs, and oil, (2) gathering and compression, and (3) fresh water distribution.

	All of our assets are located in the United States and all of our revenues are attributable to customers located in the United States.

	(i) *Reclassifications*

	Certain reclassifications have been made to prior periods’ financial information related to fresh water distribution assets to conform to the 2014 presentation.

	(j) *Earnings (loss) per share.*

	Loss per common share and loss per common share—assuming dilution for the three months ended March 31, 2013 were calculated as if the shares issued in the corporate reorganization and IPO described in note 1 were outstanding as of January 1, 2013. Because of the losses incurred for both the three months ended March 31, 2013 and 2014, the effect of options and restricted stock awards is antidilutive.

LongTerm_Debt

Long-Term Debt	3 Months Ended
	Mar. 31, 2014
Long-Term Debt	'
Long-Term Debt	'
	(3) Long-Term Debt

	The Company had long-term debt as follows at December 31, 2013 and March 31, 2014 (in thousands):

			2013	2014
	Bank credit facility(a)	$	288,000	745,000
	7.25% senior notes due 2019(b)		260,000	260,000
	6.00% senior notes due 2020(c)		525,000	525,000
	5.375% senior notes due 2021(d)		1,000,000	1,000,000
	Net unamortized premium		5,999	5,819
		$	2,078,999	2,535,819

	(a) *Senior Secured Revolving Credit Facility*

	The Company has a senior secured revolving bank credit facility (the “Credit Facility”) with a consortium of bank lenders.
	The maximum amount of the Credit Facility was $2.5 billion at March 31, 2014. Borrowings under the Credit Facility are subject to borrowing base limitations based on the collateral value of our proved properties and commodity hedge positions and are subject to regular semiannual redeterminations. At March 31, 2014, the borrowing base was $2.0 billion and lender commitments were $1.5 billion. Lender commitments can be increased to the full amount of the borrowing base upon approval of the lending group.

	On February 28, 2014, the Company and Midstream Operating entered into a new midstream credit facility (the “Midstream Facility”) in order to provide for separate borrowings attributable to our midstream business which contains covenants that are substantially identical to those under the Credit Facility. In accordance with the Credit Facility and the Midstream Facility, borrowings under the Midstream Facility reduce availability under the Credit Facility on a dollar-for-dollar basis. The Midstream Facility will mature at the earlier of the closing of the MLP’s initial public offering and the maturity of the Credit Facility.

	On May 5, 2014, the maximum amount of the Credit Facility was increased from $2.5 billion to $3.5 billion and the borrowing base was increased from $2.0 billion to $3.0 billion. Lender commitments were increased from $1.5 billion to $2.0 billion. The maturity date of the facility was amended from May 2016 to May 2019. The next redetermination of the borrowing base is scheduled to occur in October 2014.

	The Credit Facility and the Midstream Facility are ratably secured by mortgages on substantially all of the Company’s properties and guarantees from the Company or its subsidiaries, as applicable. The Credit Facility and the Midstream Facility contain certain covenants, including restrictions on indebtedness and dividends, and, in the case of the Credit Facility, requirements with respect to working capital and interest coverage ratios. Interest is payable at a variable rate based on LIBOR or the prime rate based on the Company’s election at the time of borrowing. The Company was in compliance with all of the financial covenants under the Credit Facility as of December 31, 2013 and March 31, 2014.

	As of March 31, 2014, the Company had an outstanding balance under the Credit Facility of $745 million, with a weighted average interest rate of 1.94%, and outstanding letters of credit of $73 million. As of December 31, 2013, the Company had an outstanding balance under the Credit Facility of $288 million, with a weighted average interest rate of 1.61%, and outstanding letters of credit of $32 million. Commitment fees on the unused portion of the Credit Facility are due quarterly at rates ranging from 0.375% to 0.50% of the unused facility based on utilization.

	(b) *7.25% Senior Notes Due 2019*

	On August 1, 2011, the Company issued the 7.25% senior notes due August 1, 2019 (the “2019 notes”) at par. The 2019 notes are unsecured and effectively subordinated to the Company’s Credit Facility and the Midstream Facility to the extent of the value of the collateral securing such facilities. The 2019 notes are guaranteed on a senior unsecured basis by the Company’s existing subsidiaries and certain its future restricted subsidiaries. Interest on the 2019 notes is payable on August 1 and February 1 of each year. The Company may redeem all or part of the notes at any time on or after August 1, 2014 at redemption prices ranging from 105.438% on or after August 1, 2014 to 100.00% on or after August 1, 2017. At any time prior to August 1, 2014, the Company may redeem the notes, in whole or in part, at a price equal to 100% of the principal amount of the notes plus a “make- whole” premium and accrued interest. If the Company undergoes a change of control, the holders of the 2019 notes will have the right to require the Company to repurchase all or a portion of the notes at a price equal to 101% of the principal amount of the notes, plus accrued interest.

	On November 25, 2013, the Company redeemed $140 million of the 2019 notes out of the proceeds from the IPO. On April 23, 2014, the Company delivered notice of its election to redeem the 2019 notes that remain outstanding on May 23, 2014 at a redemption price of 100% of the principal amount thereof plus a “make-whole” premium and accrued interest. The redemption will be financed using a portion of the proceeds from the offering of the Company’s 5.125% senior subordinated notes due 2022 (the “2022 notes”) described in note 11.

	(c) *6.00% Senior Notes Due 2020*

	On November 19, 2012, the Company issued $300 million of 6.00% senior notes due December 1, 2020 (the “2020 notes”) at par. On February 4, 2013, the Company issued an additional $225 million of 2020 notes at 103% of par. The 2020 notes are unsecured and effectively subordinated to the Company’s Credit Facility and the Midstream Facility to the extent of the value of the collateral securing such facilities. The 2020 notes rank pari passu to the 2019 notes and 2021 notes (as defined below). The 2020 notes are guaranteed on a senior unsecured basis by the Company’s existing subsidiaries and certain of its future restricted subsidiaries. Interest on the 2020 notes is payable on June 1 and December 1 of each year. The Company may redeem all or part of the 2020 notes at any time on or after December 1, 2015 at redemption prices ranging from 104.500% on or after December 1, 2015 to 100.00% on or after December 1, 2018. In addition, on or before December 1, 2015, the Company may redeem up to 35% of the aggregate principal amount of the 2020 notes with the net cash proceeds of certain equity offerings, if certain conditions are met, at a redemption price of 106.00% of the principal amount of the 2020 notes, plus accrued interest. At any time prior to December 1, 2015, the Company may redeem the 2020 notes, in whole or in part, at a price equal to 100% of the principal amount of the 2020 notes plus a “make-whole” premium and accrued interest. If the Company undergoes a change of control, the holders of the 2020 notes will have the right to require the Company to repurchase all or a portion of the notes at a price equal to 101% of the principal amount of the 2020 notes, plus accrued interest.

	(d) *5.375% Senior Notes Due 2021*

	On November 5, 2013, the Company issued $1 billion of 5.375% senior notes due November 21, 2021 (the “2021 notes”) at par. The 2021 notes are unsecured and effectively subordinated to the Credit Facility and the Midstream Facility to the extent of the value of the collateral securing such facilities. The 2021 notes are guaranteed on a full and unconditional and joint and several basis by the Company’s existing subsidiaries and certain of its future restricted subsidiaries. Interest on the 2021 notes is payable on May 1 and November 1 of each year. The Company may redeem all or part of the 2021 notes at any time on or after November 1, 2016 at redemption prices ranging from 104.031% on or after November 1, 2016 to 100.00% on or after November 1, 2019. In addition, on or before November 1, 2014, the Company may redeem up to 35% of the aggregate principal amount of the 2021 notes with the net cash proceeds of certain equity offerings, if certain conditions are met, at a redemption price of 105.375% of the principal amount of the 2021 notes, plus accrued interest. At any time prior to November 1, 2016, the Company may also redeem the 2021 notes, in whole or in part, at a price equal to 100% of the principal amount of the 2021 notes plus a “make-whole” premium and accrued interest. If the Company undergoes a change of control prior to May 1, 2016, it may redeem all, but not less than all, of the 2021 notes at a redemption price equal to 110% of the principal amount of the 2021 notes. If the Company undergoes a change of control, it may be required to offer to purchase the 2021 notes from the holders at a price equal to 101% of the principal amount of the 2021 notes, plus accrued interest.

	(e) *Treasury Management Facility*

	The Company has a stand-alone revolving note with a lender under the Credit Facility which provides for up to $25.0 million of cash management obligations in order to facilitate the Company’s daily treasury management. Borrowings under the revolving note are secured by the collateral for the revolving credit facility. Borrowings under the facility bear interest at the lender’s prime rate plus 1.0%. The note matures on June 1, 2014. At March 31, 2014 and December 31, 2013, there were no outstanding borrowings under this facility.

Asset_Retirement_Obligations

Asset Retirement Obligations	3 Months Ended
	Mar. 31, 2014
Asset Retirement Obligations	'
Asset Retirement Obligations	'
	(4) Asset Retirement Obligations

	The following is a reconciliation of the Company’s asset retirement obligations for the three months ended March 31, 2014 (in thousands).

	Asset retirement obligations—beginning of period	$	11,859
	Obligations incurred		261
	Accretion expense		302
	Asset retirement obligations—end of period	$	12,422

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
Stock-Based Compensation	Mar. 31, 2014
Stock-Based Compensation	'
Stock-Based Compensation	'
	(5) Stock-Based Compensation

	The Company is authorized to grant up to 16,906,500 stock-based compensation awards to employees and directors of the Company under the Antero Resources Corporation Long-Term Incentive Plan (the “Plan”). The Plan allows stock-based compensation awards to be granted in a variety of forms, including stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, dividend equivalent awards, and other types of awards. The terms and conditions of the awards granted are established by the Compensation Committee of the Company’s Board of Directors. A total of 16,779,323 shares are available for future grant under the Plan as of March 31, 2014.

	Our stock-based compensation expense is as follows for the three months ended March 31, 2014 (in thousands):

	Profits interests awards (see note 1)	$	28,689
	Restricted stock awards		309
	Stock options		139
	Total expense	$	29,137

	Restricted Stock and Restricted Stock Unit Awards

	Restricted stock awards vest subject to the satisfaction of service requirements. The grant date fair value of these awards are determined based on the price of the Company’s common stock on the date of the grant. A summary of restricted stock and restricted stock unit awards activity during the three months ended March 31, 2014 is as follows:

			Number of			Weighted			Aggregate
			shares			average			intrinsic value
						grant date			(in thousands)
						fair value
	Total granted and unvested, December 31, 2013		45,093		$	54.27		$	2,861
	Granted		13,795		$	56.82			863
	Vested		—
	Forfeited		(2,050	)	$	55.63			(128	)
	Total awarded and unvested—March 31, 2014		56,838		$	54.27		$	3,558

	Unamortized expense of $2.3 million at March 31, 2014 is expected to be recognized over approximately 3 years.

	Subsequent to March 31, 2014, the Company granted restricted stock unit awards for 1,902,889 shares at a grant date fair value of $123.8 million, which will be recognized as expense over vesting periods of approximately 3.5 to 4 years.

	Stock Options

	Stock options granted under the Plan to date vest over periods from one to four years and have a maximum contractual life of 10 years. We recognize expense related to stock options on a straight-line basis over the requisite service period, less awards expected to be forfeited. Stock options are granted with an exercise price equal to the market price of our common stock on the date of grant. A summary of stock option activity for the three months ended March 31, 2014 is as follows:

			Stock		Weighted		Weighted		Intrinsic
			options		average		average		value
					exercise		remaining		(in thousands)
					price		contractual
							life
	Outstanding at December 31, 2013		70,339	$	54.15		9.79	$	653
	Options granted		—		—
	Options exercised		—		—
	Options cancelled		—		—
	Options expired		—		—
	Outstanding at March 31, 2014		70,339	$	54.15		9.54	$	594
	Expected to vest as of March 31, 2014		70,339	$	54.15		9.54	$	594
	Exercisable at March 31, 2014		—

	We use a Black-Scholes option-pricing model to determine the fair value of our stock options. Expected volatility was derived from the volatility of the historical stock prices of a peer group of similar publicly traded companies’ stock prices. The risk-free interest rate was determined using the implied yield currently available for zero-coupon U.S. government issues with a remaining term approximating the expected life of the options. We assumed no dividend yield.

	The following table presents information regarding the weighted average fair value for options granted and the assumptions used to determine fair value.

	Dividend yield		—	%
	Volatility		35	%
	Risk-free interest rate		1.48	%
	Expected life (years)		6.17
	Weighted average fair value of options granted	$	20.2

	As of March 31, 2014, there was $1.2 million of unrecognized stock-based compensation expense related to nonvested stock options. That expense is expected to be recognized over a weighted average period of 3 years.

Financial_Instruments

Financial Instruments	3 Months Ended
Financial Instruments	Mar. 31, 2014
Financial Instruments	'
Financial Instruments	'
	(6) Financial Instruments

	The carrying values of trade receivables and trade payables at December 31, 2013 and March 31, 2014 approximated market value because of their short-term nature. The carrying value of the bank credit facility at December 31, 2013 and March 31, 2014 approximated fair value because the variable interest rates are reflective of current market conditions.

	The fair value of the Company’s senior notes was approximately $1.9 billion, based on Level 2 market data inputs at December 31, 2013 and $1.8 billion at March 31, 2014.

	See note 7 for information regarding the fair value of derivative financial instruments.

Derivative_Instruments

Derivative Instruments	3 Months Ended
Derivative Instruments	Mar. 31, 2014
Derivative Instruments	'
Derivative Instruments	'
	(7) Derivative Instruments

	(a) *Commodity Derivatives*

	The Company periodically enters into natural gas derivative contracts with counterparties to hedge the price risk associated with a portion of its production. These derivatives are not held for trading purposes. To the extent that changes occur in the market prices of natural gas, the Company is exposed to market risk on these open contracts. This market risk exposure is generally offset by the change in market prices of natural gas recognized upon the ultimate sale of the natural gas produced.

	For the three months ended March 31, 2013 and 2014, the Company was party to natural gas fixed price swaps. When actual commodity prices exceed the fixed price provided by the swap contracts, the Company pays the excess to the counterparty, and when actual commodity prices are below the contractually provided fixed price the Company receives the difference from the counterparty. The Company’s natural gas swaps have not been designated as hedges for accounting purposes; therefore, all gains and losses were recognized in income currently.

	As of March 31, 2014, the Company has entered into fixed price natural gas and oil swaps in order to hedge a portion of its natural gas and oil production from April 1, 2014 through December 31, 2019 as summarized in the following table.

			Natural gas		Oil		Weighted
			MMbtu/day		Bbls/day		average index
							price
	Nine Months ending
	December 31, 2014:
	TCO		210,000		—	$	5.06
	Dominion South		160,000		—	$	5.1
	NYMEX		340,000		—	$	4.1
	CGTLA		10,000		—	$	3.84
	NYMEX-WTI		—		3,000	$	95.22
	2014 Total		720,000		3,000

			Natural gas		Oil		Weighted
			MMbtu/day		Bbls/day		average index
							price
	Year ending December 31, 2015:
	TCO		130,000			$	4.93
	Dominion South		230,000			$	5.6
	NYMEX		250,000			$	4.14
	CGTLA		40,000			$	4
	2015 Total		650,000

	Year ending December 31, 2016:
	TCO		80,000			$	4.67
	Dominion South		272,500			$	5.35
	NYMEX		120,000			$	4.17
	CGTLA		170,000			$	4.09
	2016 Total		642,500

	Year ending December 31, 2017:
	TCO		20,000			$	4.02
	NYMEX		270,000			$	4.39
	CGTLA		420,000			$	4.27
	CCG		70,000			$	4.57
	2017 Total		780,000

	Year ending December 31, 2018:
	NYMEX		710,000			$	4.6

	Year ending December 31, 2019:
	NYMEX		467,500			$	4.41

	(b) *Summary*

	The following is a summary of the fair values of derivative instruments not designated as hedges for accounting purposes and where such values are recorded in the consolidated balance sheets as of December 31, 2013 and March 31, 2014. None of the Company’s derivative instruments are designated as hedges for accounting purposes.

			31-Dec-13				31-Mar-14
			Balance sheet		Fair value		Balance sheet		Fair value
			location		Fair value		location		Fair value
					(In thousands)				(In thousands)
	Asset derivatives not designated as hedges for accounting purposes:
	Commodity contracts		Current assets	$	183,000		Current assets	$	130,679
	Commodity contracts		Long-term assets		677,780		Long-term assets		500,882

Total asset derivatives				860,780				631,561

Liability derivatives not designated as hedges for accounting purposes:
Commodity contracts		Current liabilities		646		Current liabilities		17,623
Commodity contracts		Long-term liabilities		—		Long-term liabilities		1,662

Total liability derivatives				646				19,285

Net derivatives			$	860,134			$	612,276

The following tables present the gross amounts of recognized derivative assets and liabilities, the amounts offset under netting arrangements with counterparties, and the resulting net amounts presented in the condensed consolidated balance sheets for the periods presented, all at fair value (in thousands):

		December 31, 2013									March 31, 2014
		Gross			Gross amounts			Net amounts			Gross		Gross amounts		Net amounts
		amounts on			offset on			on balance			amounts on		offset on		of assets
		balance sheet			balance sheet			sheet			balance sheet		balance sheet		(liabilities)
															on balance
															sheet
Commodity derivative assets	$	887,034			(26,254	)		860,780		$	700,418		(68,857	)	631,561
Commodity derivative liabilities	$	(646	)		—			(646	)	$	(21,031	)	1,746		(19,285	)

The following is a summary of derivative fair losses and where such values are recorded in the consolidated statements of operations for the three months ended March 31, 2013 and 2014 (in thousands):

		Statement of			2013			2014
		operations
		location
Commodity derivative fair value losses		Revenue		$	(71,941	)		(248,929	)


The fair value of commodity derivative instruments was determined using Level 2 inputs.

Contingencies

Contingencies	3 Months Ended
Contingencies	Mar. 31, 2014
Contingencies	'
Contingencies	'
	(8) Contingencies

	The Company is party to various legal proceedings and claims in the ordinary course of its business. The Company believes certain of these matters will be covered by insurance and that the outcome of other matthers will not have a material adverse effect on its consolidated financial position, results of operations, or liquidity.

Segment_Information

Segment Information	3 Months Ended
Segment Information	Mar. 31, 2014
Segment Information	'
Segment Information	'
	(9) Segment Information

	The operating results and assets of the Company’s reportable segments were as follows for the three months ended March 31, 2013 and 2014 (in thousands):

			Exploration		Gathering and	Fresh water	Elimination of		Consolidated
			and		compression	distribution	intersegment		total
			production				transactions
	2013:00:00
	Sales and revenues:
	Third-party	$	61,454		—	—	—		61,454
	Intersegment		—		1,953	4,365	(6,318	)	—
		$	61,454		1,953	4,365	(6,318	)	61,454

	Depletion, depreciation, and amortization	$	39,476		1,012	—	(124	)	40,364
	Interest expense	$	29,909		19	—	—		29,928
	Income tax benefit	$	30,400		—	—	—		30,400
	Operating income (loss)(1)	$	(49,087	)	744	3,571	(3,697	)	(48,469	)
	Segment assets	$	4,038,932		238,067	22,856	(206,976	)	4,092,879
	Capital expenditures for segment assets	$	488,479		55,975	9,020	(3,821	)	549,653

			Exploration		Gathering and	Fresh water	Elimination of		Consolidated
			and		compression	distribution	intersegment		total
			production				transactions
	2014:00:00
	Sales and revenues:
	Third-party	$	161,457		930	2,594	—		164,981
	Intersegment		—		10,843	21,909	(32,752	)	—
		$	161,457		11,773	24,503	(32,752	)	164,981

	Depletion, depreciation, and amortization	$	83,138		6,108	2,918	(958	)	91,206
	Interest expense	$	31,084		172	86	—		31,342
	Income tax benefit	$	40,662		—	—	—		40,662
	Operating income (loss)(1)	$	(109,482	)	4,896	16,202	(15,695	)	(104,079	)
	Segment assets	$	6,982,436		703,426	288,981	(840,386	)	7,134,457
	Capital expenditures for segment assets	$	581,736		107,523	60,030	(17,583	)	731,706

	(1) All general and administrative expenses are included in the exploration and production segment.

Subsidiary_Guarantors

Subsidiary Guarantors	3 Months Ended
Subsidiary Guarantors	Mar. 31, 2014
Subsidiary Guarantors	'
Subsidiary Guarantors	'
	(10) Subsidiary Guarantors

	The Company’s wholly owned subsidiaries each have fully and unconditionally guaranteed the Company’s outstanding senior notes. The following Condensed Consolidating Balance Sheets as of December 31, 2013 and March 31, 2014 present financial information for Antero Resources Corporation as the Parent on a stand-alone basis (carrying its investment in subsidiaries using the equity method), combined financial information for the subsidiary guarantors (Antero Resources Midstream LLC and Antero Midstream LLC) as a group, and the consolidation and elimination entries necessary to arrive at the information for the Company on a consolidated basis. The guarantor subsidiaries had no revenues, expenses, or cash flow during the year ended December 31, 2013 or the three months ended March 31, 2014. The guarantor subsidiaries are not restricted from making distributions to the Company.

	Condensed Consolidating Balance Sheets

	December 31, 2013

	(In thousands)

			Parent	Guarantor	Eliminations		Consolidated
			Parent	Subsidiaries	Eliminations		Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	17,487	—	—		17,487
	Other		316,077	1	(1	)	316,077
	Total current assets		333,564	1	(1	)	333,564

	Property and equipment, net		5,559,656	—	—		5,559,656
	Other long-term assets		720,361	—	—		720,361
	Investment in subsidiary		1	—	(1	)	—
		$	6,613,582	1	(2	)	6,613,581

	Liabilities and Stockholders’ Equity

	Current liabilities	$	622,229	—			622,229
	Long-term debt		2,078,999	—	—		2,078,999
	Other long-term liabilities		313,693	—	—		313,693
	Due to subsidiary		1	—	(1	)	—
	Total liabilities		3,014,922	—	(1	)	3,014,921

	Stockholders’ equity		3,598,660	1	(1	)	3,598,660
	Total liabilities and equity	$	6,613,582	1	(2	)	6,613,581

	March 31, 2014

			Parent	Guarantor	Eliminations		Consolidated
			Parent	Subsidiaries	Eliminations		Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	12,580	—	—		12,580
	Other		309,342	1	(1	)	309,342
	Total current assets		321,922	1	(1	)	321,922

	Property and equipment, net		6,266,227	—	—		6,266,227
	Other long-term assets		546,308	—	—		546,308
	Investment in subsidiary		1	—	(1	)	—
		$	7,134,458	1	(2	)	7,134,457

	Liabilities and Stockholders’ Equity

	Current liabilities	$	760,806	—			760,806
	Long-term debt		2,535,819	—	—		2,535,819
	Other long-term liabilities		304,794	—	—		304,794
	Due to subsidiary		1	—	(1	)	—
	Total liabilities		3,601,420	—	(1	)	3,601,419

	Stockholders’ equity		3,533,038	1	(1	)	3,533,038
	Total liabilities and equity	$	7,134,458	1	(2	)	7,134,457

Subsequent_Events

Subsequent Events	3 Months Ended
Subsequent Events	Mar. 31, 2014
Subsequent Events	'
Subsequent Events	'
	(11) Subsequent Events

	On April 1, 2014, the Company granted restricted stock unit awards for 1,902,899 shares at a grant date fair value of $123.8 million, which will be recognized as expense over vesting periods of approximately 3.5 to 4 years.

	On April 23, 2014, the Company delivered notice of its election to redeem the 2019 notes that remain outstanding on May 23, 2014 at a redemption price of 100% of the principal amount thereof plus a “make-whole” premium and accrued interest. The redemption will be financed using a portion of the proceeds from the offering of the 2022 notes described below.

	On May 5, 2014 the Credit Facility was amended to increase the face amount of the facility from $2.5 billion to $3.5 billion, to increase the borrowing base from $2.0 billion to $3.0 billion, and to increase lender commitments from $1.5 billion to $2.0 billion. The maturity date of the facility was amended from May 2016 to May 2019.

	On May 6, 2014, the Company issued $600 million of its 5.125% senior subordinated notes due 2022 at par. A portion of the net proceeds from the sale of the 2022 notes will be used to redeem all outstanding 2019 notes and the remainder will be used to partially repay amounts outstanding under the Credit Facility.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2014
Summary of Significant Accounting Policies	'
Basis of Presentation	'
	(a) *Basis of Presentation*

	These consolidated financial statements have been prepared pursuant to the rules and regulations of the SEC applicable to interim financial information and should be read in the context of the December 31, 2013 consolidated financial statements and notes thereto for a more complete understanding of the Company’s operations, financial position, and accounting policies. The December 31, 2013 consolidated financial statements have been filed with the SEC in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.

	The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial information, and, accordingly, do not include all of the information and footnotes required by GAAP for complete consolidated financial statements. In the opinion of management, the accompanying unaudited consolidated financial statements include all adjustments (consisting of normal and recurring accruals) considered necessary to present fairly the Company’s financial position as of March 31, 2014, and the results of its operations for the three months ended March 31, 2013 and 2014, and its cash flows for the three months ended March 31, 2013 and 2014. The Company has no items of other comprehensive income or loss; therefore, our net loss is identical to our comprehensive loss. All significant intercompany accounts and transactions have been eliminated. Operating results for the period ended March 31, 2014 are not necessarily indicative of the results that may be expected for the full year because of the impact of fluctuations in prices received for natural gas and oil, natural production declines, the uncertainty of exploration and development drilling results, and other factors.

	The Company’s exploration and production activities are accounted for under the successful efforts method.

	As of the date these financial statements were filed with the SEC, the Company completed its evaluation of potential subsequent events for disclosure and no items requiring disclosure were identified, except as described in note 11.
Use of Estimates	'
	(b) *Use of Estimates*

	The preparation of consolidated financial statements in conformity with generally accepted accounting principles in the United States requires management to make estimates and assumptions that affect the reported assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Changes in facts and circumstances or discovery of new information may result in revised estimates, and actual results could differ from those estimates.

	The Company’s consolidated financial statements are based on a number of significant estimates including estimates of gas and oil reserve quantities, which are the basis for the calculation of depreciation, depletion, amortization, present value of cash flows from reserves, and impairment of oil and gas properties. Reserve estimates by their nature are inherently imprecise.
Risks and Uncertainties	'
	(c) *Risks and Uncertainties*

	Historically, the market for natural gas, NGLs, and oil has experienced significant price fluctuations. Prices for natural gas have been particularly volatile in recent years. The price fluctuations can result from variations in weather, levels of production in the region, availability of transportation capacity to other regions of the country, and various other factors. Increases or decreases in prices received could have a significant impact on the Company’s future results of operations.
Cash and Cash Equivalents	'
	(d) *Cash and Cash Equivalents*

	The Company considers all liquid investments purchased with an initial maturity of three months or less to be cash equivalents. The carrying value of cash and cash equivalents approximates fair value due to the short-term nature of these instruments.
Derivative Financial Instruments	'
	(e) *Derivative Financial Instruments*

	In order to manage its exposure to oil and gas price volatility, the Company enters into derivative transactions from time to time, including commodity swap agreements, collar agreements, and other similar agreements relating to natural gas and oil expected to be produced. To the extent legal right of offset with a counterparty exists, the Company reports derivative assets and liabilities on a net basis. The Company has exposure to credit risk to the extent the counterparty is unable to satisfy its settlement obligation. The Company actively monitors the creditworthiness of counterparties and assesses the impact, if any, on its derivative position.

	The Company records derivative instruments on the consolidated balance sheets as either an asset or liability measured at fair value and records changes in the fair value of derivatives in current earnings as they occur. Changes in the fair value of commodity derivatives are classified as revenues.
Income Taxes	'
	(f) *Income Taxes*

	The Company recognizes deferred tax assets and liabilities for temporary differences resulting from net operating loss carryforwards for income tax purposes and the differences between the financial statement and tax basis of assets and liabilities. The effect of changes in the tax laws or tax rates is recognized in income in the period such changes are enacted. Deferred tax assets are reduced by a valuation allowance, when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized.

	Unrecognized tax benefits represent potential future tax obligations for uncertain tax positions taken on previously filed tax returns that may not ultimately be sustained. The Company recognizes interest expense related to unrecognized tax benefits in interest expense and fines and penalties as income tax expense.
Fair Value Measurements	'
	(g) *Fair Value Measurements*

	FASB ASC Topic 820, Fair Value Measurements and Disclosures, clarifies the definition of fair value, establishes a framework for measuring fair value, and expands disclosures about fair value measurements. This guidance also relates to all nonfinancial assets and liabilities that are not recognized or disclosed on a recurring basis (e.g., those measured at fair value in a business combination, the initial recognition of asset retirement obligations, and impairments of proved oil and gas properties, and other long-lived assets). The fair value is the price that the Company estimates would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. A fair value hierarchy is used to prioritize input to valuation techniques used to estimate fair value. An asset or liability subject to the fair value requirements is categorized within the hierarchy based on the lowest level of input that is significant to the fair value measurement. The Company’s assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. The highest priority (Level 1) is given to unadjusted quoted market prices in active markets for identical assets or liabilities, and the lowest priority (Level 3) is given to unobservable inputs. Level 2 inputs are data, other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Instruments which are valued using Level 2 inputs include nonexchange traded derivatives such as over-the-counter commodity price swaps, basis swaps, and interest rate swaps. Valuation models used to measure fair value of these instruments consider various Level 2 inputs including (i) quoted forward prices for commodities, (ii) time value, (iii) quoted forward interest rates, (iv) current market prices and contractual prices for the underlying instruments, (v) risk of nonperformance by the Company and the counterparty, and (vi) other relevant economic measures.
Industry Segments and Geographic Information	'
	(h) *Industry Segments and Geographic Information*

	We have evaluated how the Company is organized and managed and have identified the following operating segments: (1) the exploration, development and production of natural gas, NGLs, and oil, (2) gathering and compression, and (3) fresh water distribution.

	All of our assets are located in the United States and all of our revenues are attributable to customers located in the United States.
Reclassifications	'
	(i) *Reclassifications*

	Certain reclassifications have been made to prior periods’ financial information related to fresh water distribution assets to conform to the 2014 presentation.
Earnings (loss) per share	'
	(j) *Earnings (loss) per share.*

	Loss per common share and loss per common share—assuming dilution for the three months ended March 31, 2013 were calculated as if the shares issued in the corporate reorganization and IPO described in note 1 were outstanding as of January 1, 2013. Because of the losses incurred for both the three months ended March 31, 2013 and 2014, the effect of options and restricted stock awards is antidilutive.

LongTerm_Debt_Tables

Long-Term Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Long-Term Debt	'
Schedule of long-term debt	'
	The Company had long-term debt as follows at December 31, 2013 and March 31, 2014 (in thousands):

			2013	2014
	Bank credit facility(a)	$	288,000	745,000
	7.25% senior notes due 2019(b)		260,000	260,000
	6.00% senior notes due 2020(c)		525,000	525,000
	5.375% senior notes due 2021(d)		1,000,000	1,000,000
	Net unamortized premium		5,999	5,819
		$	2,078,999	2,535,819

	(a) *Senior Secured Revolving Credit Facility*

	The Company has a senior secured revolving bank credit facility (the “Credit Facility”) with a consortium of bank lenders.
	The maximum amount of the Credit Facility was $2.5 billion at March 31, 2014. Borrowings under the Credit Facility are subject to borrowing base limitations based on the collateral value of our proved properties and commodity hedge positions and are subject to regular semiannual redeterminations. At March 31, 2014, the borrowing base was $2.0 billion and lender commitments were $1.5 billion. Lender commitments can be increased to the full amount of the borrowing base upon approval of the lending group.

	On February 28, 2014, the Company and Midstream Operating entered into a new midstream credit facility (the “Midstream Facility”) in order to provide for separate borrowings attributable to our midstream business which contains covenants that are substantially identical to those under the Credit Facility. In accordance with the Credit Facility and the Midstream Facility, borrowings under the Midstream Facility reduce availability under the Credit Facility on a dollar-for-dollar basis. The Midstream Facility will mature at the earlier of the closing of the MLP’s initial public offering and the maturity of the Credit Facility.

	On May 5, 2014, the maximum amount of the Credit Facility was increased from $2.5 billion to $3.5 billion and the borrowing base was increased from $2.0 billion to $3.0 billion. Lender commitments were increased from $1.5 billion to $2.0 billion. The maturity date of the facility was amended from May 2016 to May 2019. The next redetermination of the borrowing base is scheduled to occur in October 2014.

	The Credit Facility and the Midstream Facility are ratably secured by mortgages on substantially all of the Company’s properties and guarantees from the Company or its subsidiaries, as applicable. The Credit Facility and the Midstream Facility contain certain covenants, including restrictions on indebtedness and dividends, and, in the case of the Credit Facility, requirements with respect to working capital and interest coverage ratios. Interest is payable at a variable rate based on LIBOR or the prime rate based on the Company’s election at the time of borrowing. The Company was in compliance with all of the financial covenants under the Credit Facility as of December 31, 2013 and March 31, 2014.

	As of March 31, 2014, the Company had an outstanding balance under the Credit Facility of $745 million, with a weighted average interest rate of 1.94%, and outstanding letters of credit of $73 million. As of December 31, 2013, the Company had an outstanding balance under the Credit Facility of $288 million, with a weighted average interest rate of 1.61%, and outstanding letters of credit of $32 million. Commitment fees on the unused portion of the Credit Facility are due quarterly at rates ranging from 0.375% to 0.50% of the unused facility based on utilization.

	(b) *7.25% Senior Notes Due 2019*

	On August 1, 2011, the Company issued the 7.25% senior notes due August 1, 2019 (the “2019 notes”) at par. The 2019 notes are unsecured and effectively subordinated to the Company’s Credit Facility and the Midstream Facility to the extent of the value of the collateral securing such facilities. The 2019 notes are guaranteed on a senior unsecured basis by the Company’s existing subsidiaries and certain its future restricted subsidiaries. Interest on the 2019 notes is payable on August 1 and February 1 of each year. The Company may redeem all or part of the notes at any time on or after August 1, 2014 at redemption prices ranging from 105.438% on or after August 1, 2014 to 100.00% on or after August 1, 2017. At any time prior to August 1, 2014, the Company may redeem the notes, in whole or in part, at a price equal to 100% of the principal amount of the notes plus a “make- whole” premium and accrued interest. If the Company undergoes a change of control, the holders of the 2019 notes will have the right to require the Company to repurchase all or a portion of the notes at a price equal to 101% of the principal amount of the notes, plus accrued interest.

	On November 25, 2013, the Company redeemed $140 million of the 2019 notes out of the proceeds from the IPO. On April 23, 2014, the Company delivered notice of its election to redeem the 2019 notes that remain outstanding on May 23, 2014 at a redemption price of 100% of the principal amount thereof plus a “make-whole” premium and accrued interest. The redemption will be financed using a portion of the proceeds from the offering of the Company’s 5.125% senior subordinated notes due 2022 (the “2022 notes”) described in note 11.

	(c) *6.00% Senior Notes Due 2020*

	On November 19, 2012, the Company issued $300 million of 6.00% senior notes due December 1, 2020 (the “2020 notes”) at par. On February 4, 2013, the Company issued an additional $225 million of 2020 notes at 103% of par. The 2020 notes are unsecured and effectively subordinated to the Company’s Credit Facility and the Midstream Facility to the extent of the value of the collateral securing such facilities. The 2020 notes rank pari passu to the 2019 notes and 2021 notes (as defined below). The 2020 notes are guaranteed on a senior unsecured basis by the Company’s existing subsidiaries and certain of its future restricted subsidiaries. Interest on the 2020 notes is payable on June 1 and December 1 of each year. The Company may redeem all or part of the 2020 notes at any time on or after December 1, 2015 at redemption prices ranging from 104.500% on or after December 1, 2015 to 100.00% on or after December 1, 2018. In addition, on or before December 1, 2015, the Company may redeem up to 35% of the aggregate principal amount of the 2020 notes with the net cash proceeds of certain equity offerings, if certain conditions are met, at a redemption price of 106.00% of the principal amount of the 2020 notes, plus accrued interest. At any time prior to December 1, 2015, the Company may redeem the 2020 notes, in whole or in part, at a price equal to 100% of the principal amount of the 2020 notes plus a “make-whole” premium and accrued interest. If the Company undergoes a change of control, the holders of the 2020 notes will have the right to require the Company to repurchase all or a portion of the notes at a price equal to 101% of the principal amount of the 2020 notes, plus accrued interest.

	(d) *5.375% Senior Notes Due 2021*

	On November 5, 2013, the Company issued $1 billion of 5.375% senior notes due November 21, 2021 (the “2021 notes”) at par. The 2021 notes are unsecured and effectively subordinated to the Credit Facility and the Midstream Facility to the extent of the value of the collateral securing such facilities. The 2021 notes are guaranteed on a full and unconditional and joint and several basis by the Company’s existing subsidiaries and certain of its future restricted subsidiaries. Interest on the 2021 notes is payable on May 1 and November 1 of each year. The Company may redeem all or part of the 2021 notes at any time on or after November 1, 2016 at redemption prices ranging from 104.031% on or after November 1, 2016 to 100.00% on or after November 1, 2019. In addition, on or before November 1, 2014, the Company may redeem up to 35% of the aggregate principal amount of the 2021 notes with the net cash proceeds of certain equity offerings, if certain conditions are met, at a redemption price of 105.375% of the principal amount of the 2021 notes, plus accrued interest. At any time prior to November 1, 2016, the Company may also redeem the 2021 notes, in whole or in part, at a price equal to 100% of the principal amount of the 2021 notes plus a “make-whole” premium and accrued interest. If the Company undergoes a change of control prior to May 1, 2016, it may redeem all, but not less than all, of the 2021 notes at a redemption price equal to 110% of the principal amount of the 2021 notes. If the Company undergoes a change of control, it may be required to offer to purchase the 2021 notes from the holders at a price equal to 101% of the principal amount of the 2021 notes, plus accrued interest.

	(e) *Treasury Management Facility*

	The Company has a stand-alone revolving note with a lender under the Credit Facility which provides for up to $25.0 million of cash management obligations in order to facilitate the Company’s daily treasury management. Borrowings under the revolving note are secured by the collateral for the revolving credit facility. Borrowings under the facility bear interest at the lender’s prime rate plus 1.0%. The note matures on June 1, 2014. At March 31, 2014 and December 31, 2013, there were no outstanding borrowings under this facility.

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	3 Months Ended
	Mar. 31, 2014
Asset Retirement Obligations	'
Schedule of reconciliation of asset retirement obligations	'
	The following is a reconciliation of the Company’s asset retirement obligations for the three months ended March 31, 2014 (in thousands).

	Asset retirement obligations—beginning of period	$	11,859
	Obligations incurred		261
	Accretion expense		302
	Asset retirement obligations—end of period	$	12,422

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
Stock-Based Compensation (Tables)	Mar. 31, 2014
Stock-Based Compensation	'
Schedule of stock-based compensation expense	'
	Our stock-based compensation expense is as follows for the three months ended March 31, 2014 (in thousands):

	Profits interests awards (see note 1)	$	28,689
	Restricted stock awards		309
	Stock options		139
	Total expense	$	29,137

Summary of restricted stock and restricted stock unit awards activity	'


			Number of			Weighted			Aggregate
			shares			average			intrinsic value
						grant date			(in thousands)
						fair value
	Total granted and unvested, December 31, 2013		45,093		$	54.27		$	2,861
	Granted		13,795		$	56.82			863
	Vested		—
	Forfeited		(2,050	)	$	55.63			(128	)
	Total awarded and unvested—March 31, 2014		56,838		$	54.27		$	3,558

Summary of stock option activity	'


			Stock		Weighted		Weighted		Intrinsic
			options		average		average		value
					exercise		remaining		(in thousands)
					price		contractual
							life
	Outstanding at December 31, 2013		70,339	$	54.15		9.79	$	653
	Options granted		—		—
	Options exercised		—		—
	Options cancelled		—		—
	Options expired		—		—
	Outstanding at March 31, 2014		70,339	$	54.15		9.54	$	594
	Expected to vest as of March 31, 2014		70,339	$	54.15		9.54	$	594
	Exercisable at March 31, 2014		—

Schedule of information regarding weighted average fair value of options granted and the assumptions used to determine fair value	'

	Dividend yield		—	%
	Volatility		35	%
	Risk-free interest rate		1.48	%
	Expected life (years)		6.17
	Weighted average fair value of options granted	$	20.2

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
Derivative Instruments (Tables)	Mar. 31, 2014
Derivative Instruments	'
Schedule of outstanding commodity derivatives	'
	As of March 31, 2014, the Company has entered into fixed price natural gas and oil swaps in order to hedge a portion of its natural gas and oil production from April 1, 2014 through December 31, 2019 as summarized in the following table.

			Natural gas		Oil		Weighted
			MMbtu/day		Bbls/day		average index
							price
	Nine Months ending
	December 31, 2014:
	TCO		210,000		—	$	5.06
	Dominion South		160,000		—	$	5.1
	NYMEX		340,000		—	$	4.1
	CGTLA		10,000		—	$	3.84
	NYMEX-WTI		—		3,000	$	95.22
	2014 Total		720,000		3,000

			Natural gas		Oil		Weighted
			MMbtu/day		Bbls/day		average index
							price
	Year ending December 31, 2015:
	TCO		130,000			$	4.93
	Dominion South		230,000			$	5.6
	NYMEX		250,000			$	4.14
	CGTLA		40,000			$	4
	2015 Total		650,000

	Year ending December 31, 2016:
	TCO		80,000			$	4.67
	Dominion South		272,500			$	5.35
	NYMEX		120,000			$	4.17
	CGTLA		170,000			$	4.09
	2016 Total		642,500

	Year ending December 31, 2017:
	TCO		20,000			$	4.02
	NYMEX		270,000			$	4.39
	CGTLA		420,000			$	4.27
	CCG		70,000			$	4.57
	2017 Total		780,000

	Year ending December 31, 2018:
	NYMEX		710,000			$	4.6

	Year ending December 31, 2019:
	NYMEX		467,500			$	4.41

Summary of the fair values of derivative instruments, which are not designated as hedges for accounting purposes	'


			31-Dec-13				31-Mar-14
			Balance sheet		Fair value		Balance sheet		Fair value
			location		Fair value		location		Fair value
					(In thousands)				(In thousands)
	Asset derivatives not designated as hedges for accounting purposes:
	Commodity contracts		Current assets	$	183,000		Current assets	$	130,679
	Commodity contracts		Long-term assets		677,780		Long-term assets		500,882

	Total asset derivatives				860,780				631,561

	Liability derivatives not designated as hedges for accounting purposes:
	Commodity contracts		Current liabilities		646		Current liabilities		17,623
	Commodity contracts		Long-term liabilities		—		Long-term liabilities		1,662

	Total liability derivatives				646				19,285

	Net derivatives			$	860,134			$	612,276

Schedule of gross amounts of recognized derivative assets and liabilities, the amounts offset under netting arrangements with counterparties, and the resulting net amounts	'
	The following tables present the gross amounts of recognized derivative assets and liabilities, the amounts offset under netting arrangements with counterparties, and the resulting net amounts presented in the condensed consolidated balance sheets for the periods presented, all at fair value (in thousands):

			December 31, 2013									March 31, 2014
			Gross			Gross amounts			Net amounts			Gross		Gross amounts		Net amounts
			amounts on			offset on			on balance			amounts on		offset on		of assets
			balance sheet			balance sheet			sheet			balance sheet		balance sheet		(liabilities)
																on balance
																sheet
	Commodity derivative assets	$	887,034			(26,254	)		860,780		$	700,418		(68,857	)	631,561
	Commodity derivative liabilities	$	(646	)		—			(646	)	$	(21,031	)	1,746		(19,285	)

Summary of derivative fair value losses	'
	The following is a summary of derivative fair losses and where such values are recorded in the consolidated statements of operations for the three months ended March 31, 2013 and 2014 (in thousands):

			Statement of			2013			2014
			operations
			location
	Commodity derivative fair value losses		Revenue		$	(71,941	)		(248,929	)

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
Segment Information (Tables)	Mar. 31, 2014
Segment Information	'
Schedule of operating results and assets of reportable segments	'
	The operating results and assets of the Company’s reportable segments were as follows for the three months ended March 31, 2013 and 2014 (in thousands):

			Exploration		Gathering and	Fresh water	Elimination of		Consolidated
			and		compression	distribution	intersegment		total
			production				transactions
	2013:00:00
	Sales and revenues:
	Third-party	$	61,454		—	—	—		61,454
	Intersegment		—		1,953	4,365	(6,318	)	—
		$	61,454		1,953	4,365	(6,318	)	61,454

	Depletion, depreciation, and amortization	$	39,476		1,012	—	(124	)	40,364
	Interest expense	$	29,909		19	—	—		29,928
	Income tax benefit	$	30,400		—	—	—		30,400
	Operating income (loss)(1)	$	(49,087	)	744	3,571	(3,697	)	(48,469	)
	Segment assets	$	4,038,932		238,067	22,856	(206,976	)	4,092,879
	Capital expenditures for segment assets	$	488,479		55,975	9,020	(3,821	)	549,653

			Exploration		Gathering and	Fresh water	Elimination of		Consolidated
			and		compression	distribution	intersegment		total
			production				transactions
	2014:00:00
	Sales and revenues:
	Third-party	$	161,457		930	2,594	—		164,981
	Intersegment		—		10,843	21,909	(32,752	)	—
		$	161,457		11,773	24,503	(32,752	)	164,981

	Depletion, depreciation, and amortization	$	83,138		6,108	2,918	(958	)	91,206
	Interest expense	$	31,084		172	86	—		31,342
	Income tax benefit	$	40,662		—	—	—		40,662
	Operating income (loss)(1)	$	(109,482	)	4,896	16,202	(15,695	)	(104,079	)
	Segment assets	$	6,982,436		703,426	288,981	(840,386	)	7,134,457
	Capital expenditures for segment assets	$	581,736		107,523	60,030	(17,583	)	731,706

	(1) All general and administrative expenses are included in the exploration and production segment.

Subsidiary_Guarantors_Tables

Subsidiary Guarantors (Tables)	3 Months Ended
Subsidiary Guarantors (Tables)	Mar. 31, 2014
Subsidiary Guarantors	'
Schedule of condensed consolidated balance sheets	'
	Condensed Consolidating Balance Sheets

	December 31, 2013

	(In thousands)

			Parent	Guarantor	Eliminations		Consolidated
			Parent	Subsidiaries	Eliminations		Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	17,487	—	—		17,487
	Other		316,077	1	(1	)	316,077
	Total current assets		333,564	1	(1	)	333,564

	Property and equipment, net		5,559,656	—	—		5,559,656
	Other long-term assets		720,361	—	—		720,361
	Investment in subsidiary		1	—	(1	)	—
		$	6,613,582	1	(2	)	6,613,581

	Liabilities and Stockholders’ Equity

	Current liabilities	$	622,229	—			622,229
	Long-term debt		2,078,999	—	—		2,078,999
	Other long-term liabilities		313,693	—	—		313,693
	Due to subsidiary		1	—	(1	)	—
	Total liabilities		3,014,922	—	(1	)	3,014,921

	Stockholders’ equity		3,598,660	1	(1	)	3,598,660
	Total liabilities and equity	$	6,613,582	1	(2	)	6,613,581

	March 31, 2014

			Parent	Guarantor	Eliminations		Consolidated
			Parent	Subsidiaries	Eliminations		Consolidated
	Assets
	Current assets:
	Cash and cash equivalents	$	12,580	—	—		12,580
	Other		309,342	1	(1	)	309,342
	Total current assets		321,922	1	(1	)	321,922

	Property and equipment, net		6,266,227	—	—		6,266,227
	Other long-term assets		546,308	—	—		546,308
	Investment in subsidiary		1	—	(1	)	—
		$	7,134,458	1	(2	)	7,134,457

	Liabilities and Stockholders’ Equity

	Current liabilities	$	760,806	—			760,806
	Long-term debt		2,535,819	—	—		2,535,819
	Other long-term liabilities		304,794	—	—		304,794
	Due to subsidiary		1	—	(1	)	—
	Total liabilities		3,601,420	—	(1	)	3,601,419

	Stockholders’ equity		3,533,038	1	(1	)	3,533,038
	Total liabilities and equity	$	7,134,458	1	(2	)	7,134,457

Organization_Details

Organization (Details) (USD $)	3 Months Ended	12 Months Ended		0 Months Ended			0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Oct. 15, 2013	Oct. 16, 2013	Jun. 30, 2013	Oct. 15, 2013	Oct. 16, 2013
				IPO	Antero Resources LLC	Antero Investment	Antero Investment
							IPO
Corporate reorganization and initial public offering	'	'	'	'	'	'	'
Ownership percentage	'	'	'	'	100.00%	100.00%	'
Common stock, shares issued	262,049,659	262,049,659	224,375,000	'	'	'	'
Common stock, shares outstanding	262,049,659	262,049,659	224,375,000	'	'	'	'
Number of additional shares of common stock issued	'	'	'	37,674,659	'	'	'
Common stock price (in dollars per share)	'	'	'	$44	'	'	'
Net proceeds from issuance of additional shares of common stock	'	'	'	$1,600,000,000	'	'	'
Number of shares of common stock sold	'	'	'	'	'	'	3,409,091
Stock Compensation Charge in Connection with the Reorganization	'	'	'	'	'	'	'
Stock compensation expense recognized	29,137,000	365,000,000	'	'	'	'	'
Additional stock compensation to be recognized over the remaining service period	$121,000,000	'	'	'	'	'	'

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Summary of Significant Accounting Policies	'
Other comprehensive income (loss)	$0

LongTerm_Debt_Details

Long-Term Debt (Details) (USD $)

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

2-May-14

Mar. 31, 2014

Nov. 25, 2013

Mar. 31, 2014

Dec. 31, 2013

Apr. 23, 2014

6-May-14

Mar. 31, 2014

Dec. 31, 2013

Feb. 04, 2013

Nov. 19, 2012

Mar. 31, 2014

Dec. 31, 2013

Nov. 05, 2013

Mar. 31, 2014

Dec. 31, 2013

Mar. 31, 2014

Dec. 31, 2013

Nov. 25, 2013

Bank credit facility

7.25% senior notes due 2019

6.00% senior notes due 2020

5.375% senior notes due 2021

Net unamortized premium

Stand-alone revolving note

5.125% senior subordinated notes due 2022

Subsequent event

Minimum

Maximum

Subsequent event

Antero Finance

Maximum

On or after November 1, 2016

On or after November 1, 2019

Prior to November 1, 2016

On or before November 1, 2016

Minimum

On or after August 1, 2014

On or after August 1, 2017

On or before August 1, 2014

On or after December 1, 2015

On or after December 1, 2018

On or before December 1, 2015

Prior to December 1, 2015

Antero Finance

On or before November 1, 2016

On or before December 1, 2015

Long- term Debt

Long-term debt

$2,535,819,000

$2,078,999,000

$745,000,000

$288,000,000

$260,000,000

$525,000,000

$1,000,000,000

$5,819,000

$5,999,000

Interest rate (as a percent)

7.25%

6.00%

5.38%

5.13%

Maximum amount of the Credit Facility

2,500,000,000

3,500,000,000

25,000,000

Maximum amount of the Credit Facility before amendment

2,500,000,000

Current borrowing base

2,000,000,000

3,000,000,000

Current borrowing base before amendment

2,000,000,000

Lender commitments

1,500,000,000

2,000,000,000

Redemption of debts out of the proceeds from its IPO

140,000,000

Lender commitments before amendment

1,500,000,000

Make-hole premium percentage

106.07%

Outstanding balance

745,000,000

288,000,000

Weighted average interest rate (as a percent)

1.94%

1.61%

Outstanding letters of credit

73,000,000

32,000,000

Commitment fees on the unused portion (as a percent)

0.38%

0.50%

Senior notes issued

$225,000,000

$300,000,000

$1,000,000,000

Issue price as percentage of par value

103.00%

Redemption price of the debt instrument in the event of change of control (as a percent)

105.44%

100.00%

104.50%

100.00%

104.03%

100.00%

Percentage of the principal amount of the debt instrument redeemed

110.00%

Percentage of the principal amount of the 2021 notes, plus accrued interest of the debt instrument redeemed

101.00%

105.38%

Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from certain equity offerings

35.00%

Redemption price of the debt instrument if redeemed with the proceeds of certain equity offerings (as a percent)

106.00%

Percentage of principal amount at which notes may be required to be repurchased in event of change of control

101.00%

Description of variable rate basis

'LIBOR or lender's prime rate

'lender's prime rate

Basis spread on variable rate (as a percent)

1.00%

Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from initial public offering

100.00%

Asset_Retirement_Obligations_D

Asset Retirement Obligations (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014
Asset Retirement Obligations	'
Asset retirement obligations - beginning of period	$11,859
Obligations incurred	261
Accretion expense	302
Asset retirement obligations - end of period	$12,422

StockBased_Compensation_Detail

Stock-Based Compensation (Details) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Stock-Based Compensation	'	'
Number of stock-based compensation awards authorized	16,906,500	'
Number of shares available for future grant under the Plan	16,779,323	'
Stock-based compensation expense	'	'
Stock compensation expense recognized	$29,137	$365,000
Profits interests awards	'	'
Stock-based compensation expense	'	'
Stock compensation expense recognized	28,689	'
Restricted stock awards	'	'
Stock-based compensation expense	'	'
Stock compensation expense recognized	309	'
Stock options	'	'
Stock-based compensation expense	'	'
Stock compensation expense recognized	$139	'

StockBased_Compensation_Detail1

Stock-Based Compensation (Details 2) (USD $)	3 Months Ended		0 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Apr. 01, 2014	Apr. 01, 2014	Apr. 01, 2014
		Restricted stock awards	Restricted stock units	Restricted stock units	Restricted stock units
			Subsequent event	Subsequent event	Subsequent event
				Minimum	Maximum
Number of shares	'	'	'	'	'
Total granted and unvested at the beginning of the period (in shares)	'	45,093	'	'	'
Granted (in shares)	'	13,795	1,902,889	'	'
Forfeited (in shares)	'	-2,050	'	'	'
Total awarded and unvested at the end of the period (in shares)	'	56,838	'	'	'
Weighted average grant date fair value	'	'	'	'	'
Total granted and unvested at the beginning of the period (in dollars per share)	'	$54.27	'	'	'
Granted (in dollars per share)	'	$56.82	'	'	'
Forfeited (in dollars per share)	'	$55.63	'	'	'
Total awarded and unvested at the end of the period (in dollars per share)	'	$54.27	'	'	'
Aggregate intrinsic value	'	'	'	'	'
Total awarded and unvested at the beginning of the period	'	$2,861,000	'	'	'
Granted	'	863,000	'	'	'
Forfeited	'	-128,000	'	'	'
Total awarded and unvested at the end of the period	'	3,558,000	'	'	'
Weighted average grant date fair value	'	'	123,800,000	'	'
Unrecognized stock-based compensation expense	$2,300,000	'	'	'	'
Weighted average period for recognizing unrecognized stock-based compensation expense	'3 years	'	'	'3 years 6 months	'4 years

StockBased_Compensation_Detail2

Stock-Based Compensation (Details 3) (USD $)	3 Months Ended	12 Months Ended
Stock-Based Compensation (Details 3) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Additional disclosures	'	'
Unrecognized stock-based compensation expense	$2,300,000	'
Weighted average period for recognizing unrecognized stock-based compensation expense	'3 years	'
Stock options	'	'
Stock options	'	'
Outstanding at the beginning of the period (in shares)	70,339	'
Outstanding at the end of the period (in shares)	70,339	70,339
Expected to vest (in shares)	70,339	'
Weighted average exercise price	'	'
Outstanding at the beginning of the period (in dollars per share)	$54.15	'
Outstanding at the end of the period (in dollars per share)	$54.15	$54.15
Expected to vest (in dollars per share)	$54.15	'
Weighted average remaining contractual life	'	'
Outstanding at the beginning of the period	'9 years 6 months 14 days	'9 years 9 months 14 days
Outstanding at the end of the period	'9 years 6 months 14 days	'9 years 9 months 14 days
Expected to vest	'9 years 6 months 14 days	'
Intrinsic Value	'	'
Outstanding at the beginning of the period	653,000	'
Outstanding at the end of the period	594,000	653,000
Expected to vest	594,000	'
Weighted-average assumptions used to calculate fair value of stock options granted	'	'
Dividend yield (as a percent)	0.00%	'
Volatility (as a percent)	35.00%	'
Risk-free interest rate (as a percent)	1.48%	'
Expected life	'6 years 2 months 1 day	'
Weighted average fair value of options granted (in dollars per share)	$20.20	'
Additional disclosures	'	'
Unrecognized stock-based compensation expense	$1,200,000	'
Weighted average period for recognizing unrecognized stock-based compensation expense	'3 years	'
Stock options \| Minimum	'	'
Stock-based compensation	'	'
Vesting period	'1 year	'
Stock options \| Maximum	'	'
Stock-based compensation	'	'
Vesting period	'4 years	'
Contractual life	'10 years	'

Financial_Instruments_Details

Financial Instruments (Details) (Recurring, Level 2 market data, USD $)	Mar. 31, 2014	Dec. 31, 2013
In Billions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Recurring \| Level 2 market data	'	'
Financial Instruments	'	'
Fair value of senior notes	$1.80	$1.90

Derivative_Instruments_Details

Derivative Instruments (Details) (Swaps)	Mar. 31, 2014
Natural gas \| Year ending December 31, 2014	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	720,000
Natural gas \| Year ending December 31, 2015	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	650,000
Natural gas \| Year ending December 31, 2016	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	642,500
Natural gas \| Year ending December 31, 2017	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	780,000
Natural gas \| TCO \| Year ending December 31, 2014	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	210,000
Weighted average index price	5.06
Natural gas \| TCO \| Year ending December 31, 2015	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	130,000
Weighted average index price	4.93
Natural gas \| TCO \| Year ending December 31, 2016	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	80,000
Weighted average index price	4.67
Natural gas \| TCO \| Year ending December 31, 2017	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	20,000
Weighted average index price	4.02
Natural gas \| Dominion South \| Year ending December 31, 2014	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	160,000
Weighted average index price	5.1
Natural gas \| Dominion South \| Year ending December 31, 2015	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	230,000
Weighted average index price	5.6
Natural gas \| Dominion South \| Year ending December 31, 2016	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	272,500
Weighted average index price	5.35
Natural gas \| NYMEX \| Year ending December 31, 2014	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	340,000
Weighted average index price	4.1
Natural gas \| NYMEX \| Year ending December 31, 2015	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	250,000
Weighted average index price	4.14
Natural gas \| NYMEX \| Year ending December 31, 2016	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	120,000
Weighted average index price	4.17
Natural gas \| NYMEX \| Year ending December 31, 2017	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	270,000
Weighted average index price	4.39
Natural gas \| NYMEX \| Year ending December 31, 2018	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	710,000
Weighted average index price	4.6
Natural gas \| NYMEX \| Year ending December 31, 2019	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	467,500
Weighted average index price	4.41
Natural gas \| CGTLA \| Year ending December 31, 2014	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	10,000
Weighted average index price	3.84
Natural gas \| CGTLA \| Year ending December 31, 2015	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	40,000
Weighted average index price	4
Natural gas \| CGTLA \| Year ending December 31, 2016	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	170,000
Weighted average index price	4.09
Natural gas \| CGTLA \| Year ending December 31, 2017	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	420,000
Weighted average index price	4.27
Natural gas \| NYMEX-WTI \| Year ending December 31, 2014	'
Derivative Instruments	'
Weighted average index price	95.22
Natural gas \| CCG \| Year ending December 31, 2017	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	70,000
Weighted average index price	4.57
Oil \| Year ending December 31, 2014	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	3,000
Oil \| NYMEX-WTI \| Year ending December 31, 2014	'
Derivative Instruments	'
Notional amount (MMBtu/Bbls per day)	3,000

Derivative_Instruments_Details1

Derivative Instruments (Details 2) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair value of derivative instruments	'	'
Current portion of fair value of derivative assets	$130,679	$183,000
Noncurrent portion of fair value of derivative assets	500,882	677,780
Current portion of fair value of derivative liability	17,623	646
Commodity contracts	'	'
Fair value of derivative instruments	'	'
Total asset derivatives	631,561	860,780
Total liability derivatives	-19,285	-646
Derivatives not designated as hedges for accounting purposes \| Commodity contracts	'	'
Fair value of derivative instruments	'	'
Current portion of fair value of derivative assets	130,679	183,000
Noncurrent portion of fair value of derivative assets	500,882	677,780
Total asset derivatives	631,561	860,780
Current portion of fair value of derivative liability	17,623	646
Noncurrent portion of fair value of derivative liability	1,662	'
Total liability derivatives	19,285	646
Net derivatives	$612,276	$860,134
Derivatives designated as hedges for accounting purposes	'	'
Fair value of derivative instruments	'	'
Number of derivative instruments held	0	'

Derivative_Instruments_Details2

Derivative Instruments (Details 3) (Commodity derivative, USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Commodity derivative	'	'
Commodity derivative assets	'	'
Gross amounts on balance sheet	$700,418	$887,034
Gross amounts offset on balance sheet	-68,857	-26,254
Total asset derivatives	631,561	860,780
Commodity derivative liabilities	'	'
Gross amounts on balance sheet	-21,031	-646
Gross amounts offset on balance sheet	1,746	'
Total liability derivatives	($19,285)	($646)

Derivative_Instruments_Details3

Derivative Instruments (Details 4) (Revenue, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Revenue	'	'
Summary of realized and unrealized gains (losses) on derivative instruments	'	'
Commodity derivative fair value losses	($248,929)	($71,941)

Segment_Information_Details

Segment Information (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Operating results and assets of reportable segments	'	'	'
Sales and revenues	$164,981	$61,454	'
Depletion, depreciation, and amortization	91,206	40,364	'
Interest expense	31,342	29,928	'
Income tax benefit	40,662	30,400	'
Operating income (loss)	-104,079	-48,469	'
Segment assets	7,134,457	4,092,879	6,613,581
Capital expenditures for segment assets	731,706	549,653	'
Operating segments \| Exploration and production	'	'	'
Operating results and assets of reportable segments	'	'	'
Sales and revenues	161,457	61,454	'
Depletion, depreciation, and amortization	83,138	39,476	'
Interest expense	31,084	29,909	'
Income tax benefit	40,662	30,400	'
Operating income (loss)	-109,482	-49,087	'
Segment assets	6,982,436	4,038,932	'
Capital expenditures for segment assets	581,736	488,479	'
Operating segments \| Gathering and compression	'	'	'
Operating results and assets of reportable segments	'	'	'
Sales and revenues	11,773	1,953	'
Depletion, depreciation, and amortization	6,108	1,012	'
Interest expense	172	19	'
Operating income (loss)	4,896	744	'
Segment assets	703,426	238,067	'
Capital expenditures for segment assets	107,523	55,975	'
Operating segments \| Fresh Water Distribution	'	'	'
Operating results and assets of reportable segments	'	'	'
Sales and revenues	24,503	4,365	'
Depletion, depreciation, and amortization	2,918	'	'
Interest expense	86	'	'
Operating income (loss)	16,202	3,571	'
Segment assets	288,981	22,856	'
Capital expenditures for segment assets	60,030	9,020	'
Elimination of intersegment transaction	'	'	'
Operating results and assets of reportable segments	'	'	'
Sales and revenues	-32,752	-6,318	'
Depletion, depreciation, and amortization	-958	-124	'
Operating income (loss)	-15,695	-3,697	'
Segment assets	-840,386	-206,976	'
Capital expenditures for segment assets	($17,583)	($3,821)	'

Subsidiary_Guarantors_Details

Subsidiary Guarantors (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Current assets:	'	'	'	'
Cash and cash equivalents	$12,580	$17,487	$4,806	$18,989
Other	4,405	2,975	'	'
Total current assets	321,922	333,564	'	'
Property and equipment, net	6,266,227	5,559,656	'	'
Other long-term assets	546,308	720,361	'	'
Total assets	7,134,457	6,613,581	4,092,879	'
Liabilities and Stockholders' Equity	'	'	'	'
Current liabilities	760,806	622,229	'	'
Long-term debt	2,535,819	2,078,999	'	'
Other long-term liabilities	304,794	313,693	'	'
Total liabilities	3,601,419	3,014,921	'	'
Total stockholders' equity	3,533,038	3,598,660	'	'
Total liabilities and equity	7,134,457	6,613,581	'	'
Reportable legal entity \| Parent Company	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	12,580	17,487	'	'
Other	309,342	316,077	'	'
Total current assets	321,922	333,564	'	'
Property and equipment, net	6,266,227	5,559,656	'	'
Other long-term assets	546,308	720,361	'	'
Investment in subsidiary	1	1	'	'
Total assets	7,134,458	6,613,582	'	'
Liabilities and Stockholders' Equity	'	'	'	'
Current liabilities	760,806	622,229	'	'
Long-term debt	2,535,819	2,078,999	'	'
Other long-term liabilities	304,794	313,693	'	'
Due to subsidiary	1	1	'	'
Total liabilities	3,601,420	3,014,922	'	'
Total stockholders' equity	3,533,038	3,598,660	'	'
Total liabilities and equity	7,134,458	6,613,582	'	'
Reportable legal entity \| Guarantor Subsidiary	'	'	'	'
Current assets:	'	'	'	'
Other	1	1	'	'
Total current assets	1	1	'	'
Total assets	1	1	'	'
Liabilities and Stockholders' Equity	'	'	'	'
Total stockholders' equity	1	1	'	'
Total liabilities and equity	1	1	'	'
Eliminations	'	'	'	'
Current assets:	'	'	'	'
Other	-1	-1	'	'
Total current assets	-1	-1	'	'
Investment in subsidiary	-1	-1	'	'
Total assets	-2	-2	'	'
Liabilities and Stockholders' Equity	'	'	'	'
Due to subsidiary	-1	-1	'	'
Total liabilities	-1	-1	'	'
Total stockholders' equity	-1	-1	'	'
Total liabilities and equity	($2)	($2)	'	'

Subsequent_Events_Details

Subsequent Events (Details) (USD $)	3 Months Ended		0 Months Ended			0 Months Ended					0 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Nov. 25, 2013	Mar. 31, 2014	Dec. 31, 2013	Apr. 01, 2014	Apr. 01, 2014	Apr. 01, 2014	2-May-14	6-May-14	Apr. 23, 2014
		Credit Facility	7.25% senior notes due 2019	7.25% senior notes due 2019	7.25% senior notes due 2019	Subsequent event	Subsequent event	Subsequent event	Subsequent event	Subsequent event	Subsequent event
						Restricted stock units	Restricted stock units	Restricted stock units	Credit Facility	5% senior subordinated notes	7.25% senior notes due 2019
							Minimum	Maximum
Subsequent events	'	'	'	'	'	'	'	'	'	'	'
Granted (in shares)	'	'	'	'	'	1,902,889	'	'	'	'	'
Weighted average grant date fair value	'	'	'	'	'	$123,800,000	'	'	'	'	'
Weighted average period for recognizing unrecognized stock-based compensation expense	'3 years	'	'	'	'	'	'3 years 6 months	'4 years	'	'	'
Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from initial public offering	'	'	100.00%	'	'	'	'	'	'	'	100.00%
Face amount of the Credit Facility before amendment	'	'	'	'	'	'	'	'	2,500,000,000	'	'
Face amount of the Credit Facility	'	2,500,000,000	'	'	'	'	'	'	3,500,000,000	'	'
Borrowing base before amendment	'	'	'	'	'	'	'	'	2,000,000,000	'	'
Borrowing base	'	2,000,000,000	'	'	'	'	'	'	3,000,000,000	'	'
Lender commitments before amendment	'	'	'	'	'	'	'	'	1,500,000,000	'	'
Lender commitments	'	1,500,000,000	'	'	'	'	'	'	2,000,000,000	'	'
Senior notes issued	'	'	'	'	'	'	'	'	'	$600,000,000	'
Interest rate (as a percent)	'	'	'	7.25%	7.25%	'	'	'	'	5.13%	'