Investments in Unconsolidated Affiliates (Details) $ in Thousands	2 Months Ended	3 Months Ended		7 Months Ended	9 Months Ended
	Mar. 12, 2019 USD ($)	Sep. 30, 2019 USD ($) item mi	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) item mi	Sep. 30, 2019 USD ($) item mi	Sep. 30, 2018 USD ($)
Investments in unconsolidated affiliates
Balance at beginning of period	$ 43,492				$ 43,492
Distributions from unconsolidated affiliates	(43,492)				(43,492)	$ (85,371)
Investments in unconsolidated affiliates acquired from Antero Midstream Partners				$ 562,560
Additional investments				117,339
Equity in net income of unconsolidated affiliates		$ 18,478	$ 37,816	34,981	34,981	$ 99,414
Distributions from unconsolidated affiliates				(42,570)	(42,570)
Balance at end of period		$ 672,310		$ 672,310	672,310
Antero Midstream Partners LP
Investments in unconsolidated affiliates
Balance at beginning of period	43,492				$ 43,492
Distributions from unconsolidated affiliates	$ (43,492)
Stonewall
Equity Method Investments
Ownership percentage		15.00%		15.00%	15.00%
Number of miles of pipeline | mi		67		67	67
Investments in unconsolidated affiliates
Investments in unconsolidated affiliates acquired from Antero Midstream Partners				$ 140,640
Equity in net income of unconsolidated affiliates				3,482
Distributions from unconsolidated affiliates				(3,525)
Balance at end of period		$ 140,597		$ 140,597	$ 140,597
MarkWest Joint venture
Equity Method Investments
Ownership percentage		50.00%		50.00%	50.00%
Percentage of interest held by joint venture in third party fractionator in Ohio					33.33%
Number of fractionators | item		2		2	2
Investments in unconsolidated affiliates
Investments in unconsolidated affiliates acquired from Antero Midstream Partners				$ 421,920
Additional investments				117,339
Equity in net income of unconsolidated affiliates				31,499
Distributions from unconsolidated affiliates				(39,045)
Balance at end of period		$ 531,713		$ 531,713	$ 531,713