Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Sales and revenues:
Sales and revenues	$ 1,117,400	$ 1,076,532	$ 3,448,175	$ 3,093,978
Sales and revenues	1,118,881	1,076,532	3,455,952	3,093,978
Operating expenses:
Impairment of oil and gas properties	1,041,469	221,094	1,253,712	406,068
Impairment of midstream assets	7,800	1,157	14,782	9,658
Depletion, depreciation, and amortization	241,503	243,186	724,006	709,480
General and administrative	35,923	59,860	146,507	181,576
Other operating expenses	138,276	183,658	522,794	649,279
Total operating expenses	2,104,759	1,071,728	4,375,541	2,975,444
Operating income (loss)	(985,878)	4,804	(919,589)	118,534
Equity in earnings (loss) of unconsolidated affiliates	(117,859)	10,705	(90,193)	27,832
Investments in unconsolidated affiliates	1,819,323		1,819,323		$ 433,642
Segment assets	16,120,288	15,802,535	16,120,288	15,802,535	$ 15,519,464
Capital expenditures for segment assets	292,176	567,221	1,106,362	1,676,245
Marketing
Sales and revenues:
Sales and revenues			200,911
Operating expenses:
Other operating expenses			408,839
Total operating expenses			408,839
Operating income (loss)			(207,928)
Segment assets	25,361		25,361
Antero Midstream Corporation
Sales and revenues:
Sales and revenues			50
Operating expenses:
Impairment of midstream assets			472,854
Depletion, depreciation, and amortization			68,557
General and administrative			85,026
Other operating expenses			8,005
Total operating expenses			774,193
Operating income (loss)			(220,672)
Equity in earnings (loss) of unconsolidated affiliates			34,981
Investments in unconsolidated affiliates	672,310		672,310
Segment assets	6,445,504		6,445,504
Capital expenditures for segment assets			262,065
Operating segments
Sales and revenues:
Sales and revenues				3,093,978
Operating segments | Exploration and production
Sales and revenues:
Sales and revenues	1,070,755	982,131	3,247,214	2,590,409
Sales and revenues	1,072,236	987,328	3,252,213	2,606,660
Operating expenses:
Impairment of oil and gas properties	1,041,469	221,094	1,253,712	406,068
Depletion, depreciation, and amortization	241,503	204,465	702,299	601,446
General and administrative	35,923	45,474	128,213	138,555
Other operating expenses	30,060	30,695	112,952	85,067
Total operating expenses	1,988,743	979,454	4,022,639	2,566,489
Operating income (loss)	(916,507)	7,874	(770,426)	40,171
Equity in earnings (loss) of unconsolidated affiliates	(117,859)		(102,457)
Investments in unconsolidated affiliates	1,819,323		1,819,323
Segment assets	16,094,927	13,484,457	16,094,927	13,484,457
Capital expenditures for segment assets	292,176	485,219	1,053,210	1,464,041
Operating segments | Marketing
Sales and revenues:
Sales and revenues	46,645	89,556		488,270
Sales and revenues	46,645	89,556	200,911	488,270
Operating expenses:
Other operating expenses	108,216	151,764		560,924
Total operating expenses	108,216	151,764		560,924
Operating income (loss)	(61,571)	(62,208)		(72,654)
Segment assets	25,361	20,481	25,361	20,481
Operating segments | Antero Midstream Corporation
Sales and revenues:
Sales and revenues		4,845		15,299
Sales and revenues	243,795	266,205	553,521	746,772
Operating expenses:
Impairment of midstream assets	465,278	1,157		9,658
Depletion, depreciation, and amortization	24,460	38,721		108,034
General and administrative	30,595	15,018		44,967
Other operating expenses	3,210	5,219		15,129
Total operating expenses	585,684	140,424		398,955
Operating income (loss)	(341,889)	125,781		347,817
Equity in earnings (loss) of unconsolidated affiliates	18,478	10,705		27,832
Investments in unconsolidated affiliates	672,310		672,310
Segment assets	6,445,504	3,411,496	6,445,504	3,411,496
Capital expenditures for segment assets	120,875	149,953		414,833
Elimination of intersegment transaction
Sales and revenues:
Sales and revenues	1,481	(266,557)	7,777	(747,724)
Sales and revenues	(243,795)	(266,557)	(550,693)	(747,724)
Operating expenses:
Impairment of midstream assets	(457,478)		(458,072)
Depletion, depreciation, and amortization	(24,460)		(46,850)
General and administrative	(30,595)	(632)	(66,732)	(1,946)
Other operating expenses	(3,210)	(4,020)	(7,002)	(11,841)
Total operating expenses	(577,884)	(199,914)	(830,130)	(550,924)
Operating income (loss)	334,089	(66,643)	279,437	(196,800)
Equity in earnings (loss) of unconsolidated affiliates	(18,478)		(22,717)
Investments in unconsolidated affiliates	(672,310)		(672,310)
Segment assets	(6,445,504)	(1,113,899)	(6,445,504)	(1,113,899)
Capital expenditures for segment assets	(120,875)	(67,951)	(208,913)	(202,629)
Elimination of intersegment transaction | Exploration and production
Sales and revenues:
Sales and revenues	1,481	5,197	4,999	16,251
Elimination of intersegment transaction | Antero Midstream Corporation
Sales and revenues:
Sales and revenues	243,795	261,360	553,471	731,473
Gathering, compression, water handling and treatment
Operating expenses:
Cost of goods and services sold	603,860	326,504	1,595,223	926,228
Gathering, compression, water handling and treatment | Antero Midstream Corporation
Operating expenses:
Cost of goods and services sold			28,324
Gathering, compression, water handling and treatment | Operating segments | Exploration and production
Operating expenses:
Cost of goods and services sold	603,860	442,602	1,705,709	1,236,655
Gathering, compression, water handling and treatment | Operating segments | Antero Midstream Corporation
Operating expenses:
Cost of goods and services sold	13,091	12,701		36,469
Gathering, compression, water handling and treatment | Elimination of intersegment transaction
Operating expenses:
Cost of goods and services sold	(13,091)	(128,799)	(138,810)	(346,896)
Lease operating
Operating expenses:
Cost of goods and services sold	35,928	36,269	118,517	93,155
Lease operating | Antero Midstream Corporation
Operating expenses:
Cost of goods and services sold			111,427
Lease operating | Operating segments | Exploration and production
Operating expenses:
Cost of goods and services sold	35,928	35,124	119,754	98,698
Lease operating | Operating segments | Antero Midstream Corporation
Operating expenses:
Cost of goods and services sold	49,050	67,608		184,698
Lease operating | Elimination of intersegment transaction
Operating expenses:
Cost of goods and services sold	$ (49,050)	$ (66,463)	$ (112,664)	$ (190,241)