v2.4.1.9

Net Income Per Limited Partner Unit (Details1) (USD $)	0 Months Ended	2 Months Ended	3 Months Ended	12 Months Ended
	Feb. 02, 2015	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014
Earnings Per Unit [Abstract]
Distribution declared		$ 14,322,000am_DistributionMadeToPartnerCashDistributionsDeclared
Distributions in excess of earnings		(6,900,000)am_DisributionsInExcessOfEarnings
Net income loss allocated to limited partners post Ipo		7,422,000am_NetIncomeLossAllocatedToLimitedPartnersPostIpo		7,422,000am_NetIncomeLossAllocatedToLimitedPartnersPostIpo
Weighted average units outstanding:
Basic and diluted		151,882us-gaap_WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted
Net income attributable to Antero Midstream Partners LP subsequent to IPO per limited unit partner unit
Cash distribution declared	$ 0.0943us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit		$ 0.0943us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit
Quarterly cash distribution	14,000,000us-gaap_DistributionMadeToLimitedPartnerCashDistributionsDeclared
Minimum
Net income attributable to Antero Midstream Partners LP subsequent to IPO per limited unit partner unit
Limited partner minimum quarterly distribution per partnership agreement		0.17am_LimitedPartnerMinimumQuarterlyDistributionPerPartnershipAgreement / us-gaap_RangeAxis = us-gaap_MinimumMember
Minimum quarterly cash distribution (per unit)		0.17am_LimitedPartnerMinimumQuarterlyDistributionPerPartnershipAgreement / us-gaap_RangeAxis = us-gaap_MinimumMember
Common units | Limited Partner
Earnings Per Unit [Abstract]
Distribution declared		7,161,000am_DistributionMadeToPartnerCashDistributionsDeclared / us-gaap_PartnerCapitalComponentsAxis = am_CommonUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Distributions in excess of earnings		(3,450,000)am_DisributionsInExcessOfEarnings / us-gaap_PartnerCapitalComponentsAxis = am_CommonUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Net income loss allocated to limited partners post Ipo		3,711,000am_NetIncomeLossAllocatedToLimitedPartnersPostIpo / us-gaap_PartnerCapitalComponentsAxis = am_CommonUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Weighted average units outstanding:
Basic and diluted		75,941us-gaap_WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted / us-gaap_PartnerCapitalComponentsAxis = am_CommonUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Net income attributable to Antero Midstream Partners LP subsequent to IPO per limited unit partner unit
Total earnings per unit		$ 0.05us-gaap_EarningsPerShareBasicAndDiluted / us-gaap_PartnerCapitalComponentsAxis = am_CommonUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Subordinated units | Limited Partner
Earnings Per Unit [Abstract]
Distribution declared		7,161,000am_DistributionMadeToPartnerCashDistributionsDeclared / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Distributions in excess of earnings		(3,450,000)am_DisributionsInExcessOfEarnings / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Net income loss allocated to limited partners post Ipo		$ 3,711,000am_NetIncomeLossAllocatedToLimitedPartnersPostIpo / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Weighted average units outstanding:
Basic and diluted		75,941us-gaap_WeightedAverageNumberOfLimitedPartnershipAndGeneralPartnershipUnitOutstandingBasicAndDiluted / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Net income attributable to Antero Midstream Partners LP subsequent to IPO per limited unit partner unit
Total earnings per unit		$ 0.05us-gaap_EarningsPerShareBasicAndDiluted / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember

X

- Definition

Ownership amount of cash distributions declared to unit-holders of a limited partnership (LP).

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Aggregate amount of net income allocated to limited partners subsequent to IPO.

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Amount of equity impact of cash distribution declared to unit-holder of limited partnership (LP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-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



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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The average number of limited partnership and general partnership units issued and outstanding that are used in calculating basic and diluted earnings per limited partnership and general partnership unit.

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