Condensed Consolidating Financial Information - Cash Flows (Details) - USD ($) $ in Thousands				3 Months Ended								12 Months Ended
	Sep. 11, 2017	Feb. 06, 2017	Mar. 30, 2016	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows provided by (used in) operating activities:
Net income (loss) including noncontrolling interests				$ 18,736	$ (77,972)	$ (67,275)	$ 80,810	$ 529,614	$ (90,000)	$ 39,965	$ 305,558	$ (45,701)	$ 785,137	$ (749,448)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depletion, depreciation, amortization, and accretion												975,284	827,220	812,346
Impairment of unproved properties												549,437	159,598	162,935
Impairment of gathering systems and facilities												9,658	23,431	0
Commodity derivative fair value (gains) losses												87,594	(658,283)	514,181
Gains on settled commodity derivatives												243,112	213,940	1,003,083
Premium paid on derivative contracts												(13,318)
Proceeds from derivative monetizations												370,365	749,906
Marketing derivative fair value (gains) losses												(94,081)	21,394
Gains on settled marketing derivatives												72,687
Deferred income tax expense (benefit)												(128,857)	(295,126)	(485,392)
Gain on sale of assets														(97,635)
Equity-based compensation expense												70,414	103,445	102,421
Loss on early extinguishment of debt													1,500	16,956
Equity in earnings of unconsolidated affiliates												(40,280)	(20,194)	(485)
Distributions from unconsolidated affiliates												46,415	20,195	7,702
Other												4,681	(1,907)	(12,488)
Changes in current assets and liabilities												(25,423)	76,035	(32,920)
Net cash provided by operating activities												2,081,987	2,006,291	1,241,256
Cash flows used in investing activities:
Additions to proved properties													(175,650)	(134,113)
Additions to unproved properties												(172,387)	(204,272)	(611,631)
Drilling and completion costs												(1,488,573)	(1,281,985)	(1,327,759)
Additions to water handling and treatment systems												(97,699)	(194,502)	(188,188)
Additions to gathering systems and facilities												(444,413)	(346,217)	(231,044)
Additions to other property and equipment												(7,514)	(14,127)	(2,694)
Investments in unconsolidated affiliates												(136,475)	(235,004)	(75,516)
Change in other assets												(3,663)	(12,029)	3,977
Proceeds from asset sales													2,156	171,830
Other													2,156
Net cash used in investing activities												(2,350,724)	(2,461,630)	(2,395,138)
Cash flows provided by (used in) financing activities:
Issuance of common stock														1,012,431
Issuance of common units by Antero Midstream													248,956	65,395
Repurchases of common stock												(129,084)
Sale of common units in Antero Midstream Partners LP by Antero Resources Corporation													311,100	178,000
Issuance of senior notes														1,250,000
Repayment of senior notes														(525,000)
Borrowings (repayments) on bank credit facilities, net												660,379	90,000	(677,000)
Make-whole premium on debt extinguished														(15,750)
Payments of deferred financing costs												(2,169)	(16,377)	(18,759)
Distributions to noncontrolling interest in consolidated subsidiary												(267,271)	(152,352)	(75,082)
Employee tax withholding for settlement of equity compensation awards												(17,020)	(24,174)	(26,895)
Other												(4,539)	(4,983)	(5,321)
Net cash provided by financing activities												240,296	452,170	1,162,019
Net increase (decrease) in cash and cash equivalents												(28,441)	(3,169)	8,137
Cash and cash equivalents, beginning of period							28,441				31,610	28,441	31,610	23,473
Cash and cash equivalents, end of period								28,441					28,441	31,610
Antero Midstream Partners LP
Cash flows provided by (used in) financing activities:
Issuance of common stock		$ 223,000
Sale of common units in Antero Midstream Partners LP by Antero Resources Corporation	$ 311,000		$ 178,000
Reportable legal entity | Parent (Antero)
Cash flows provided by (used in) operating activities:
Net income (loss) including noncontrolling interests												(397,517)	615,070	(848,816)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depletion, depreciation, amortization, and accretion												845,136	707,658	712,485
Change in fair value of contingent acquisition consideration												93,019	(13,476)	(16,489)
Impairment of unproved properties												549,437	159,598	162,935
Impairment of gathering systems and facilities												4,470
Commodity derivative fair value (gains) losses												87,594	(658,283)	514,181
Gains on settled commodity derivatives												243,112	213,940	1,003,083
Premium paid on derivative contracts												(13,318)
Proceeds from derivative monetizations												370,365	749,906
Marketing derivative fair value (gains) losses												(94,081)	21,394
Gains on settled marketing derivatives												72,687
Deferred income tax expense (benefit)												(128,857)	(295,126)	(485,392)
Gain on sale of assets														(93,776)
Equity-based compensation expense												49,341	76,162	76,372
Loss on early extinguishment of debt													1,205	16,956
Equity in earnings (loss) of consolidated subsidiaries												3,664	43,710	7,156
Other												4,681	(4,500)	(14,302)
Distributions from subsidiaries												159,181	131,598	107,364
Changes in current assets and liabilities												(26,059)	87,466	(36,519)
Net cash provided by operating activities												1,822,855	1,836,322	1,105,238
Cash flows used in investing activities:
Additions to proved properties													(175,650)	(134,113)
Additions to unproved properties												(172,387)	(204,272)	(611,631)
Drilling and completion costs												(1,743,587)	(1,455,554)	(1,462,984)
Additions to water handling and treatment systems														32
Additions to gathering systems and facilities												103		(2,944)
Additions to other property and equipment												(7,441)	(14,127)	(2,694)
Change in other assets												(72)	(8,594)	304
Proceeds from asset sales														161,830
Other													2,156
Net cash used in investing activities												(1,923,384)	(1,856,041)	(2,052,200)
Cash flows provided by (used in) financing activities:
Issuance of common stock														1,012,431
Repurchases of common stock												(129,084)
Sale of common units in Antero Midstream Partners LP by Antero Resources Corporation													311,100	178,000
Issuance of senior notes														600,000
Repayment of senior notes														(525,000)
Borrowings (repayments) on bank credit facilities, net												225,379	(255,000)	(267,000)
Make-whole premium on debt extinguished														(15,750)
Payments of deferred financing costs													(10,857)	(8,324)
Employee tax withholding for settlement of equity compensation awards												(11,491)	(18,229)	(21,260)
Other												(4,353)	(4,785)	(5,157)
Net cash provided by financing activities												80,451	22,229	947,940
Net increase (decrease) in cash and cash equivalents												(20,078)	2,510	978
Cash and cash equivalents, beginning of period							20,078				17,568	20,078	17,568	16,590
Cash and cash equivalents, end of period								20,078					20,078	17,568
Reportable legal entity | Non-Guarantor Subsidiaries (Antero Midstream)
Cash flows provided by (used in) operating activities:
Net income (loss) including noncontrolling interests												585,944	307,315	236,703
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depletion, depreciation, amortization, and accretion												130,148	119,562	99,861
Change in fair value of contingent acquisition consideration												(93,019)	13,476	16,489
Impairment of gathering systems and facilities												5,771	23,431
Gain on sale of assets												(583)		(3,859)
Equity-based compensation expense												21,073	27,283	26,049
Loss on early extinguishment of debt													295
Equity in earnings of unconsolidated affiliates												(40,280)	(20,194)	(485)
Distributions from unconsolidated affiliates												46,415	20,195	7,702
Other												2,879	2,593	1,814
Changes in current assets and liabilities												(788)	(18,160)	(5,667)
Net cash provided by operating activities												657,560	475,796	378,607
Cash flows used in investing activities:
Additions to water handling and treatment systems												(88,674)	(195,162)	(188,220)
Additions to gathering systems and facilities												(446,270)	(346,217)	(228,100)
Investments in unconsolidated affiliates												(136,475)	(235,004)	(75,516)
Change in other assets												(3,591)	(3,435)	3,673
Change in other liabilities												2,273
Proceeds from asset sales														10,000
Other												6,150
Net cash used in investing activities												(666,587)	(779,818)	(478,163)
Cash flows provided by (used in) financing activities:
Issuance of common units by Antero Midstream													248,956	65,395
Issuance of senior notes														650,000
Borrowings (repayments) on bank credit facilities, net												435,000	345,000	(410,000)
Payments of deferred financing costs												(2,169)	(5,520)	(10,435)
Distributions to noncontrolling interest in consolidated subsidiary												(426,452)	(283,950)	(182,446)
Employee tax withholding for settlement of equity compensation awards												(5,529)	(5,945)	(5,635)
Other												(186)	(198)	(164)
Net cash provided by financing activities												664	298,343	106,715
Net increase (decrease) in cash and cash equivalents												(8,363)	(5,679)	7,159
Cash and cash equivalents, beginning of period							$ 8,363				$ 14,042	8,363	14,042	6,883
Cash and cash equivalents, end of period								$ 8,363					8,363	14,042
Eliminations
Cash flows provided by (used in) operating activities:
Net income (loss) including noncontrolling interests												(234,128)	(137,248)	(137,335)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Change in fair value of contingent acquisition consideration												93,019	(13,476)	(16,489)
Impairment of gathering systems and facilities												(583)
Gain on sale of assets												583
Equity in earnings (loss) of consolidated subsidiaries												(3,664)	(43,710)	(7,156)
Other												(2,879)
Distributions from subsidiaries												(159,181)	(131,598)	(107,364)
Changes in current assets and liabilities												1,424	6,729	9,266
Net cash provided by operating activities												(398,428)	(305,827)	(242,589)
Cash flows used in investing activities:
Drilling and completion costs												255,014	173,569	135,225
Additions to water handling and treatment systems												(9,025)	660
Additions to gathering systems and facilities												1,754
Additions to other property and equipment												(73)
Change in other liabilities												(2,273)
Other												(6,150)
Net cash used in investing activities												239,247	174,229	135,225
Cash flows provided by (used in) financing activities:
Distributions to noncontrolling interest in consolidated subsidiary												159,181	131,598	107,364
Net cash provided by financing activities												$ 159,181	$ 131,598	$ 107,364