Equity Method Investments (Details) $ in Thousands		3 Months Ended		4 Months Ended	9 Months Ended
	Mar. 12, 2019 item	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)
Investments in unconsolidated affiliates
Balance at beginning of period					$ 433,642
Investments					25,020
Equity in earnings (loss) of unconsolidated affiliates		$ (117,859)	$ 10,705		(90,193)	$ 27,832
Distributions/dividends from unconsolidated affiliates					(109,241)	$ (29,660)
Elimination of intercompany profit					30,621
Effects of deconsolidation					1,529,474
Balance at end of period		1,819,323			1,819,323
Stonewall
Investments in unconsolidated affiliates
Balance at beginning of period					68,103
Equity in earnings (loss) of unconsolidated affiliates					1,894
Distributions/dividends from unconsolidated affiliates					(3,000)
Effects of deconsolidation					(66,997)
Appalachia joint venture | MarkWest
Investments in unconsolidated affiliates
Balance at beginning of period					365,539
Investments					25,020
Equity in earnings (loss) of unconsolidated affiliates					10,370
Distributions/dividends from unconsolidated affiliates					(9,605)
Effects of deconsolidation					(391,324)
Antero Midstream Corporation
Equity Method Investments
Ownership percentage	31.00%
Investments in unconsolidated affiliates
Equity in earnings (loss) of unconsolidated affiliates					(102,457)
Distributions/dividends from unconsolidated affiliates					(96,636)
Elimination of intercompany profit					30,621
Effects of deconsolidation					1,987,795
Balance at end of period		1,819,323			1,819,323
Balance Sheet
Current assets		109,224			109,224
Noncurrent assets		6,336,280			6,336,280
Total assets		6,445,504			6,445,504
Current liabilities		259,628			259,628
Noncurrent liabilities		2,662,846			2,662,846
Stockholders' equity		3,523,030			3,523,030
Total liabilities and equity		$ 6,445,504			$ 6,445,504
Statement of Operations
Revenues				$ 553,521
Operating expenses				745,940
Loss from operations				(192,419)
Net loss attributable to the equity method investments				$ (197,006)
Antero Midstream Corporation | Antero Midstream Corporation
Equity Method Investments
Ownership percentage		31.50%			31.50%
Antero Midstream Partners LP
Equity Method Investments
Number of equity method investments | item	2
Antero Midstream Partners LP | Stonewall
Equity Method Investments
Ownership percentage	15.00%
Antero Midstream Partners LP | Appalachia joint venture
Equity Method Investments
Ownership percentage	50.00%