Subsidiary Guarantors - Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Cash flows provided by (used in) operating activities:
Net income (loss) and comprehensive income (loss) including noncontrolling interests	$ (463,068)	$ (338,810)	$ 42,168	$ 1,025,756	$ (801,878)	$ 1,067,924
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depletion, depreciation, amortization, and accretion					415,927	484,397
Impairments						219,225
Impairment of oil and gas properties	37,350		130,999		126,570	212,243
Commodity derivative fair value gains	168,015		(328,427)		(397,818)	(251,059)
Gains on settled commodity derivatives					524,838	141,791
Deferred income tax expense (benefit)					(252,389)	304,963
Loss on sale of assets			951			951
Equity-based compensation expense	7,973		6,549		11,302	15,452
Gain on early extinguishment of debt	39,171				119,732
Impairment of equity investments					610,632
Equity in (earnings) loss of unconsolidated affiliates	(20,228)		(13,585)		107,827	(27,666)
Distributions/dividends of earnings from unconsolidated affiliates					85,511	60,527
Gain on deconsolidation of Antero Midstream Partners LP						(1,406,042)
Other					4,433	5,670
Changes in current assets and liabilities					1,417	140,975
Net cash provided by operating activities					316,640	757,108
Cash flows provided by (used in) investing activities:
Additions to unproved properties					(21,672)	(56,814)
Drilling and completion costs					(552,227)	(680,088)
Additions to water handling and treatment systems						(24,416)
Additions to gathering systems and facilities						(48,239)
Additions to other property and equipment					(1,234)	(4,629)
Settlement of water earnout					125,000
Investments in unconsolidated affiliates						(25,020)
Proceeds from the Antero Midstream Partners LP Transactions						296,611
Change in other assets					525	(4,974)
Proceeds from sale of assets						1,983
Net cash used in investing activities					(449,608)	(545,586)
Cash flows provided by (used in) financing activities:
Issuance of common units by Antero Midstream Partners LP					300,000
Repurchases of common stock					(43,443)
Issuance of senior notes						650,000
Repayment of senior notes					(496,541)
Borrowings (repayments) on bank credit facilities, net					374,000	(145,000)
Sale of (purchase of) noncontrolling interests					(300,000)
Payments of deferred financing costs						(8,259)
Distributions to noncontrolling interests in Antero Midstream Partners LP						(85,076)
Employee tax withholding for settlement of equity compensation awards					(331)	(2,295)
Other					(717)	(1,360)
Net cash provided by financing activities					132,968	408,010
Effect of deconsolidation of Antero Midstream Partners LP						(619,532)
Net increase (decrease) in cash and cash equivalents					0	0
Cash and cash equivalents, beginning of period		$ 0		$ 0	0	0
Cash and cash equivalents, end of period	0		0		0	0
Reportable legal entity | Parent (Antero)
Cash flows provided by (used in) operating activities:
Net income (loss) and comprehensive income (loss) including noncontrolling interests	(484,988)				(269,272)	810,191
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depletion, depreciation, amortization, and accretion					414,687	462,627
Impairments						212,243
Impairment of oil and gas properties	37,350		130,999		126,570	212,243
Commodity derivative fair value gains	165,676		(328,427)		(400,157)	(251,059)
Gains on settled commodity derivatives					524,838	141,791
Deferred income tax expense (benefit)					(252,389)	304,963
Loss on sale of assets						951
Equity-based compensation expense					11,302	12,975
Gain on early extinguishment of debt	39,171				119,732
Equity in earnings of consolidated subsidiaries						(15,021)
Impairment of equity investments					143,849
Equity in (earnings) loss of unconsolidated affiliates	(355)		(4,410)		39,957	(4,999)
Distributions/dividends of earnings from unconsolidated affiliates					85,511	47,922
Gain on deconsolidation of Antero Midstream Partners LP						(1,205,705)
Distributions from Antero Midstream Partners LP						94,391
Other					4,433	(43,002)
Changes in current assets and liabilities					7,043	134,740
Net cash provided by operating activities					316,640	703,008
Cash flows provided by (used in) investing activities:
Additions to unproved properties					(21,672)	(56,814)
Drilling and completion costs					(552,227)	(700,653)
Additions to other property and equipment					(1,234)	(3,567)
Settlement of water earnout					125,000
Proceeds from the Antero Midstream Partners LP Transactions						296,611
Change in other assets					525	(1,617)
Proceeds from sale of assets						1,983
Net cash used in investing activities					(449,608)	(464,057)
Cash flows provided by (used in) financing activities:
Repurchases of common stock					(43,443)
Repayment of senior notes					(496,541)
Borrowings (repayments) on bank credit facilities, net					374,000	(235,379)
Sale of (purchase of) noncontrolling interests					6,793
(Distributions) proceeds to interest holders					300,000
Payments of deferred financing costs						(791)
Employee tax withholding for settlement of equity compensation awards					(331)	(2,266)
Other					(717)	(515)
Net cash provided by financing activities					126,175	(238,951)
Net increase (decrease) in cash and cash equivalents					(6,793)
Cash and cash equivalents, end of period	(6,793)				(6,793)
Reportable legal entity | Guarantor Subsidiaries
Cash flows provided by (used in) operating activities:
Net income (loss) and comprehensive income (loss) including noncontrolling interests	19,873				(534,653)	210,740
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Impairment of equity investments					466,783
Equity in (earnings) loss of unconsolidated affiliates	(19,873)		$ (9,175)		67,870	(10,403)
Gain on deconsolidation of Antero Midstream Partners LP						(200,337)
Reportable legal entity | Non-Guarantor Subsidiaries (Martica)
Cash flows provided by (used in) operating activities:
Net income (loss) and comprehensive income (loss) including noncontrolling interests	2,047				2,047	99,518
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depletion, depreciation, amortization, and accretion					1,240	21,770
Impairments						6,982
Commodity derivative fair value gains	2,339				2,339
Equity-based compensation expense						2,477
Equity in (earnings) loss of unconsolidated affiliates						(12,264)
Distributions/dividends of earnings from unconsolidated affiliates						12,605
Other						750
Changes in current assets and liabilities					(5,626)	(10,573)
Net cash provided by operating activities						121,265
Cash flows provided by (used in) investing activities:
Additions to water handling and treatment systems						(24,547)
Additions to gathering systems and facilities						(48,239)
Additions to other property and equipment						(1,062)
Investments in unconsolidated affiliates						(25,020)
Change in other assets						(3,357)
Net cash used in investing activities						(102,225)
Cash flows provided by (used in) financing activities:
Issuance of senior notes						650,000
Borrowings (repayments) on bank credit facilities, net						90,379
Sale of (purchase of) noncontrolling interests					(306,793)
(Distributions) proceeds to interest holders					(300,000)
Payments of deferred financing costs						(7,468)
Distributions to noncontrolling interests in Antero Midstream Partners LP						(131,545)
Employee tax withholding for settlement of equity compensation awards						(29)
Other						(845)
Net cash provided by financing activities					6,793	600,492
Effect of deconsolidation of Antero Midstream Partners LP						(619,532)
Net increase (decrease) in cash and cash equivalents					6,793
Cash and cash equivalents, end of period	$ 6,793				$ 6,793
Eliminations
Cash flows provided by (used in) operating activities:
Net income (loss) and comprehensive income (loss) including noncontrolling interests						(52,525)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Equity in earnings of consolidated subsidiaries						15,021
Distributions from Antero Midstream Partners LP						(94,391)
Other						47,922
Changes in current assets and liabilities						16,808
Net cash provided by operating activities						(67,165)
Cash flows provided by (used in) investing activities:
Drilling and completion costs						20,565
Additions to water handling and treatment systems						131
Net cash used in investing activities						20,696
Cash flows provided by (used in) financing activities:
Distributions to noncontrolling interests in Antero Midstream Partners LP						46,469
Net cash provided by financing activities						$ 46,469