If-converted value of convertible notes as of the reporting date.

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If-converted value of convertible notes above (below) the principal amount as of the reporting date.

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No definition available.

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Represents the issue price of the debt instrument as a percentage of its face value.

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No definition available.

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Represents the redemption price as a percentage of the principal amount at which the debt instrument may be required to be repurchased in the event of a change of control.

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No definition available.

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The percentage of weighted average discount price of debt repurchased.

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No definition available.

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Weighted average percentage discount on repurchases of debt.

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Represents the borrowing base under the credit facility.

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Represents the redemption price as a percentage of the principal amount at which the debt instruments may be redeemed with net proceeds of certain equity offerings.

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No definition available.

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Represents the percentage of the aggregate principal amount of debt instruments that may be redeemed with net proceeds of certain equity offerings.

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No definition available.

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Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock.

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No definition available.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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The price per share of the conversion feature embedded in the debt instrument.

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Threshold period of specified consecutive trading days within which common stock price to conversion price of convertible debt instrument must exceed threshold percentage for specified number of trading days to trigger conversion feature.

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No definition available.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature.

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No definition available.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Face (par) amount of the original debt instrument that was repurchased.

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Amount, after accumulated amortization, of debt discount (premium).

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of deferred tax liability attributable to taxable temporary differences from debt issuance costs.

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Gross amount of debt extinguished.

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No definition available.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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The carrying value as of the balance sheet date of the noncurrent portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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Per share or per unit amount of equity securities issued.

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Number of new stock issued during the period.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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Long-Term Debt (Details) $ / shares in Units, $ in Thousands					3 Months Ended	12 Months Ended
	Jan. 26, 2021 USD ($)	Jan. 12, 2021 USD ($) $ / shares shares	Jan. 04, 2021 USD ($)	Aug. 21, 2020 USD ($) D shares	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Feb. 10, 2021 USD ($)	Jan. 16, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 02, 2020 USD ($)	Dec. 21, 2016 USD ($)	Mar. 17, 2015 USD ($)	Sep. 18, 2014 USD ($)	May 06, 2014 USD ($)	Nov. 05, 2013 USD ($)
Long- term Debt
Long-term debt, gross					$ 3,777,541	$ 3,129,198	$ 3,777,541
Less: unamortized note discount					791	(111,886)	791
Less: unamortized debt issuance costs					(19,464)	(15,719)	(19,464)
Long-term debt					3,758,868	3,001,593	3,758,868
Issuance of convertible notes						287,500
Payments of deferred financing costs						8,984	4,547	$ 2,169
Amount of debt repurchased						$ 1,400,000
Weighted average percentage discount on repurchases of debt						13.00%
Gain on extinguishment of debt repurchased						$ 175,962	36,419
Number of shares of common stock issued (in shares) \| shares		31,400,000
Debt Repurchase Program
Long- term Debt
Gain on extinguishment of debt repurchased					36,000
Notional amount debt repurchased					$ 225,000		225,000
Weighted average discount price					17.00%
Tender Offer
Long- term Debt
Amount of debt repurchased						$ 367,000
Weighted average percentage discount on repurchases of debt						10.00%
Subsequent event \| Equitization Transaction
Long- term Debt
Notional amount debt repurchased		$ 150,000
Credit Facility
Long- term Debt
Long-term debt, gross					$ 552,000	$ 1,017,000	$ 552,000
Current borrowing base						2,850,000
Lender commitments						$ 2,640,000
Weighted average interest rate (as a percent)					3.28%	3.26%	3.28%
Outstanding letters of credit					$ 623,000	$ 730,000	$ 623,000
Credit Facility \| Minimum
Long- term Debt
Commitment fees on the unused portion during any period that is not an Investment Grade Period (as a percent)						0.30%
Credit Facility \| Maximum
Long- term Debt
Commitment fees on the unused portion during any period that is not an Investment Grade Period (as a percent)						0.375%
5.375% senior notes due 2021
Long- term Debt
Long-term debt, gross					952,500		952,500
Interest rate (as a percent)						5.375%											5.375%
Senior notes issued																	$ 1,000,000
Issue price as percentage of par value																	100.00%
5.125 senior notes due 2022
Long- term Debt
Long-term debt, gross					923,041	$ 660,516	923,041
Interest rate (as a percent)						5.125%										5.125%
Senior notes issued															$ 500,000	$ 600,000
Issue price as percentage of par value															100.50%	100.00%
Redemption price at which notes may be required to be repurchased in event of change of control						101.00%
5.125 senior notes due 2022 \| On or after June 1, 2020
Long- term Debt
Redemption price						100.00%
5.125 senior notes due 2022 \| Subsequent event
Long- term Debt
Notional amount debt repurchased									$ 311,000	$ 350,000
5.625% senior notes due 2023
Long- term Debt
Long-term debt, gross					750,000	$ 574,182	750,000
Interest rate (as a percent)						5.625%								5.625%
Senior notes issued														$ 750,000
Issue price as percentage of par value														100.00%
Redemption price						101.406%
Redemption price at which notes may be required to be repurchased in event of change of control						101.00%
5.625% senior notes due 2023 \| On Or After June 1, 2021
Long- term Debt
Redemption price						100.00%
5.00% senior notes due 2025
Long- term Debt
Long-term debt, gross					$ 600,000	$ 590,000	$ 600,000
Interest rate (as a percent)						5.00%							5.00%
Senior notes issued													$ 600,000
Issue price as percentage of par value													100.00%
Redemption price at which notes may be required to be repurchased in event of change of control						101.00%
5.00% senior notes due 2025 \| Prior to March 1, 2020
Long- term Debt
Redemption price						100.00%
5.00% senior notes due 2025 \| On or before March 1, 2020
Long- term Debt
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)						105.00%
5.00% senior notes due 2025 \| On or after March 1, 2020
Long- term Debt
Redemption price						103.75%
5.00% senior notes due 2025 \| On or after March1, 2023
Long- term Debt
Redemption price						100.00%
4.25% convertible senior notes due 2026
Long- term Debt
Long-term debt, gross						$ 287,500					$ 287,500
Less: unamortized note discount				$ 116,000		(112,265)
Less: unamortized debt issuance costs						(5,852)
Long-term debt						$ 169,383
Interest rate (as a percent)				4.25%		4.25%
Issuance of convertible notes				$ 278,500
Payments of deferred financing costs				$ 9,000
Equity component						$ 115,601
Conversion rate in shares of Antero Resources' common stock per $1,000 principal amount \| shares				230.2026
If-converted value						361,000
If-converted value above principal amount						73,000
Effective interest rate				15.10%
Debt issuance cost						3,000
Deferred taxes						$ 28,000
Senior notes issued				$ 250,000								$ 37,500
Notional amount debt repurchased		$ 150,000
4.25% convertible senior notes due 2026 \| Convertible debt threshold minimum percentage
Long- term Debt
Stock price trigger				98.00%
Trading days \| D				5
Consecutive trading days \| D				10
4.25% convertible senior notes due 2026 \| Convertible debt threshold maximum percentage
Long- term Debt
Stock price trigger				130.00%
Trading days \| D				20
Consecutive trading days \| D				30
4.25% convertible senior notes due 2026 \| Subsequent event
Long- term Debt
Conversion price \| $ / shares		$ 0.2302026
Number of shares of common stock issued (in shares) \| shares		31,400,000
Share price \| $ / shares		$ 6.35
4.25% convertible senior notes due 2026 \| Subsequent event \| Equitization Transaction
Long- term Debt
Conversion price \| $ / shares		$ 0.2753525
Proceeds from Issuance or Sale of Equity		$ 63,000
4.25% convertible senior notes due 2026 \| Fair value
Long- term Debt
Fair value				$ 172,000
8.375% Senior Notes Due 2026 \| Subsequent event
Long- term Debt
Interest rate (as a percent)			8.375%
Senior notes issued			$ 500,000
Issue price as percentage of par value			100.00%
Redemption price at which notes may be required to be repurchased in event of change of control			101.00%
8.375% Senior Notes Due 2026 \| Subsequent event \| On or after 15 January, 2024
Long- term Debt
Redemption price			104.188%
8.375% Senior Notes Due 2026 \| Subsequent event \| On or after 15 January, 2026
Long- term Debt
Redemption price			100.00%
8.375% Senior Notes Due 2026 \| Subsequent event \| On or before 15 January, 2024
Long- term Debt
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)			108.375%
8.375% Senior Notes Due 2026 \| Subsequent event \| Prior to 15 January 2024
Long- term Debt
Redemption price			100.00%
7.625% Senior Notes Due 2029 \| Subsequent event
Long- term Debt
Interest rate (as a percent)	7.625%
Senior notes issued	$ 700,000
Issue price as percentage of par value	100.00%
Redemption price at which notes may be required to be repurchased in event of change of control	101.00%
7.625% Senior Notes Due 2029 \| Subsequent event \| On or after 01 February, 2024
Long- term Debt
Redemption price	103.813%
7.625% Senior Notes Due 2029 \| Subsequent event \| On or after 01 February, 2027
Long- term Debt
Redemption price	100.00%
7.625% Senior Notes Due 2029 \| Subsequent event \| On or before 01 February, 2024
Long- term Debt
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)	107.625%
7.625% Senior Notes Due 2029 \| Subsequent event \| Prior to 01 February 2024
Long- term Debt
Redemption price	100.00%