Cash Distribution and Dividends Paid (Details) - Antero Midstream GP LP - Common shareholders - USD ($) $ / shares in Units, $ in Thousands								6 Months Ended	12 Months Ended
May 15, 2019	May 08, 2019	Feb. 21, 2019	Nov. 21, 2018	Aug. 22, 2018	May 23, 2018	Feb. 20, 2018	Jun. 30, 2019	Dec. 31, 2018
Partnership equity and distributions
Distributions	$ 98	$ 152,082	$ 30,543	$ 26,817	$ 23,276	$ 20,109	$ 13,964	$ 182,723	$ 84,166
Distributions per share (in dollars per share)		$ 0.3025	$ 0.164	$ 0.144	$ 0.125	$ 0.108	$ 0.075

Per unit of ownership amount of cash distributions paid to unit-holder of a limited partnership (LP).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Name:	us-gaap_DistributionMadeToLimitedPartnerDistributionsPaidPerUnit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration