Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional paid-in capital	Accumulated earnings	Noncontrolling Interests	Total
Balance at Dec. 31, 2017	$ 3,164	$ 6,570,952	$ 1,575,065	$ 726,955	$ 8,876,136
Balance (in shares) at Dec. 31, 2017	316,379
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings	$ 1	(1,067)			(1,066)
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings (in shares)	145
Issuance of common units in Antero Midstream Partners LP upon vesting of equity-based compensation awards, net of units withheld for income taxes		(50)		32	(18)
Equity-based compensation		18,802		2,354	21,156
Net income (loss) and comprehensive income (loss)			14,833	65,977	80,810
Effects of changes in ownership interests in consolidated subsidiaries		(555)		555
Distributions to non-controlling interests				(55,915)	(55,915)
Other				(5)	(5)
Balance at Mar. 31, 2018	$ 3,165	6,588,082	1,589,898	739,953	8,921,098
Balance (in shares) at Mar. 31, 2018	316,524
Balance at Dec. 31, 2017	$ 3,164	6,570,952	1,575,065	726,955	8,876,136
Balance (in shares) at Dec. 31, 2017	316,379
Increase (Decrease) in Stockholders' Equity
Net income (loss) and comprehensive income (loss)					(64,437)
Balance at Sep. 30, 2018	$ 3,171	6,611,348	1,299,094	757,539	8,671,152
Balance (in shares) at Sep. 30, 2018	317,086
Balance at Mar. 31, 2018	$ 3,165	6,588,082	1,589,898	739,953	8,921,098
Balance (in shares) at Mar. 31, 2018	316,524
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings	$ 6	(5,589)			(5,583)
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings (in shares)	528
Issuance of common units in Antero Midstream Partners LP upon vesting of equity-based compensation awards, net of units withheld for income taxes		(4,007)		2,707	(1,300)
Equity-based compensation		16,930		2,141	19,071
Net income (loss) and comprehensive income (loss)			(136,385)	69,110	(67,275)
Effects of changes in ownership interests in consolidated subsidiaries		2,121		(2,121)
Distributions to non-controlling interests				(63,108)	(63,108)
Other				8	8
Balance at Jun. 30, 2018	$ 3,171	6,597,537	1,453,513	748,690	8,802,911
Balance (in shares) at Jun. 30, 2018	317,052
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings		(157)			(157)
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings (in shares)	34
Issuance of common units in Antero Midstream Partners LP upon vesting of equity-based compensation awards, net of units withheld for income taxes		(306)		226	(80)
Equity-based compensation		14,646		1,556	16,202
Net income (loss) and comprehensive income (loss)			(154,419)	76,447	(77,972)
Effects of changes in ownership interests in consolidated subsidiaries		(372)		372
Distributions to non-controlling interests				(69,752)	(69,752)
Balance at Sep. 30, 2018	$ 3,171	6,611,348	1,299,094	757,539	8,671,152
Balance (in shares) at Sep. 30, 2018	317,086
Balance at Dec. 31, 2018	$ 3,086	6,485,174	1,177,548	821,669	8,487,477
Balance (in shares) at Dec. 31, 2018	308,594
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings	$ 1	(451)			(450)
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings (in shares)	147
Issuance of common units in Antero Midstream Partners LP upon vesting of equity-based compensation awards, net of units withheld for income taxes		(85)		56	(29)
Equity-based compensation		7,801		1,102	8,903
Net income (loss) and comprehensive income (loss)			978,763	46,993	1,025,756
Distributions to non-controlling interests		(359,039)		(784,744)	(1,143,783)
Effect of deconsolidation of Antero Midstream Partners LP				(85,076)	(85,076)
Balance at Mar. 31, 2019	$ 3,087	6,133,400	2,156,311		8,292,798
Balance (in shares) at Mar. 31, 2019	308,741
Balance at Dec. 31, 2018	$ 3,086	6,485,174	1,177,548	$ 821,669	8,487,477
Balance (in shares) at Dec. 31, 2018	308,594
Increase (Decrease) in Stockholders' Equity
Net income (loss) and comprehensive income (loss)					189,060
Balance at Sep. 30, 2019	$ 3,041	6,124,042	1,319,615		7,446,698
Balance (in shares) at Sep. 30, 2019	304,161
Balance at Mar. 31, 2019	$ 3,087	6,133,400	2,156,311		8,292,798
Balance (in shares) at Mar. 31, 2019	308,741
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings	$ 4	(1,819)			(1,815)
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings (in shares)	382
Equity-based compensation		6,549			6,549
Net income (loss) and comprehensive income (loss)			42,168		42,168
Balance at Jun. 30, 2019	$ 3,091	6,138,130	2,198,479		8,339,700
Balance (in shares) at Jun. 30, 2019	309,123
Increase (Decrease) in Stockholders' Equity
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings	$ 1	(86)			(85)
Issuance of common stock upon vesting of equity-based compensation awards, net of shares withheld for income tax withholdings (in shares)	99
Repurchases and retirements of common stock	$ (51)	(17,877)			(17,928)
Repurchases and retirements of common stock (in shares)	(5,061)
Equity-based compensation		3,875			3,875
Net income (loss) and comprehensive income (loss)			(878,864)		(878,864)
Balance at Sep. 30, 2019	$ 3,041	$ 6,124,042	$ 1,319,615		$ 7,446,698
Balance (in shares) at Sep. 30, 2019	304,161