Condensed Consolidated Statements of Partners' Capital - USD ($) $ in Thousands	Common Shares Representing Limited Partner Interests	Antero Resources Midstream Management LLC Members' Equity	Series B Unitholders	Total
Balance at Dec. 31, 2016		$ 10,269		$ 10,269
Partners' Capital
Net income (loss) and comprehensive income (loss)		(3,299)		(3,299)
Equity-based compensation		7,678		7,678
Balance at Mar. 31, 2017		14,648		14,648
Balance at Dec. 31, 2016		10,269		10,269
Partners' Capital
Net income (loss) and comprehensive income (loss)				(3,582)
Balance at Sep. 30, 2017	$ 8,680			8,680
Balance at Mar. 31, 2017		14,648		14,648
Partners' Capital
Pre-IPO net (loss) and comprehensive (loss)		(1,640)		(1,640)
Pre-IPO equity-based compensation		2,559		2,559
Conversion of Antero Resources Midstream Management LLC to a limited partnership	15,567	$ (15,567)
Post-IPO net income (loss) and comprehensive income (loss)	(1,621)			(1,621)
Equity-based compensation	4,994			4,994
Balance at Jun. 30, 2017	18,940			18,940
Partners' Capital
Net income (loss) and comprehensive income (loss)				2,978
Post-IPO net income (loss) and comprehensive income (loss)	2,978			2,978
Equity-based compensation	7,696			7,696
Distributions to Antero Resources Investment LLC	(15,908)			(15,908)
Distributions	(5,026)			(5,026)
Balance at Sep. 30, 2017	8,680			8,680
Balance at Dec. 31, 2017	(19,866)		$ 35,474	15,608
Partners' Capital
Net income (loss) and comprehensive income (loss)	12,392		413	12,805
Equity-based compensation	7,777			7,777
Distributions	(13,964)		(783)	(14,747)
Balance at Mar. 31, 2018	(13,661)		35,104	21,443
Balance at Dec. 31, 2017	(19,866)		35,474	15,608
Partners' Capital
Net income (loss) and comprehensive income (loss)				45,220
Balance at Sep. 30, 2018	(10,163)		35,289	25,126
Balance at Mar. 31, 2018	(13,661)		35,104	21,443
Partners' Capital
Net income (loss) and comprehensive income (loss)	13,881		506	14,387
Equity-based compensation	7,777			7,777
Distributions	(20,109)		(414)	(20,523)
Balance at Jun. 30, 2018	(12,112)		35,196	23,084
Partners' Capital
Net income (loss) and comprehensive income (loss)	17,430		598	18,028
Equity-based compensation	7,795			7,795
Distributions	(23,276)		(505)	(23,781)
Balance at Sep. 30, 2018	$ (10,163)		$ 35,289	$ 25,126