v2.4.1.9

Net Income Per Limited Partner Unit (Details) (USD $)	0 Months Ended	3 Months Ended
	Apr. 15, 2015	Mar. 31, 2015		Mar. 31, 2014
Earnings Per Unit [Abstract]
Distribution declared		$ 27,338,000am_DistributionMadeToPartnerCashDistributionsDeclared	[1]
Distributions in excess of earnings		(11,690,000)am_DisributionsInExcessOfEarnings
Net income (loss)		15,648,000us-gaap_IncomeLossAttributableToParent		774,000us-gaap_IncomeLossAttributableToParent
Weighted average units outstanding:
Common units - basic		75,940,957am_WeightedAverageLimitedPartnershipCommonUnitsOutstandingBasic
Subordinated units		75,940,957am_WeightedAverageLimitedPartnershipUnitsOutstandingBasic
Total weighted average units outstanding - basic		151,882,000us-gaap_WeightedAverageLimitedPartnershipUnitsOutstanding
Common units diluted		75,941,670am_WeightedAverageLimitedPartnershipCommonUnitsOutstandingDiluted
Subordinated units - diluted		75,940,957am_WeightedAverageLimitedPartnershipSubordinatedUnitsOutstandingDiluted
Total weighted average units outstanding - diluted		151,882,627us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted
Net income attributable to Antero Midstream Partners LP subsequent to IPO per limited unit partner unit
Common units - basic		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipCommonUnitBasicNetOfTax
Subordinated units - basic		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipSubordinatedUnitBasicNetOfTax
Common units - diluted		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipCommonUnitDilutedNetOfTax
Subordinated units - diluted		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipSubordinatedUnitDilutedNetOfTax
Cash distribution declared	$ 0.18us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit	$ 0.18us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit
Quarterly cash distribution	27,300,000us-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
Restricted unit awards
Weighted average units outstanding:
Total weighted average units outstanding - diluted		713us-gaap_WeightedAverageLimitedPartnershipUnitsOutstandingDiluted / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember
Phantom share units
Weighted average units outstanding:
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		2,350,470us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount / us-gaap_AwardTypeAxis = us-gaap_PhantomShareUnitsPSUsMember
Limited Partner (Common units)
Earnings Per Unit [Abstract]
Distribution declared		13,669,000am_DistributionMadeToPartnerCashDistributionsDeclared / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember	[1]
Distributions in excess of earnings		(5,845,000)am_DisributionsInExcessOfEarnings / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Net income (loss)		7,824,000us-gaap_IncomeLossAttributableToParent / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Weighted average units outstanding:
Common units - basic		75,941,000am_WeightedAverageLimitedPartnershipCommonUnitsOutstandingBasic / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Common units diluted		75,942,000am_WeightedAverageLimitedPartnershipCommonUnitsOutstandingDiluted / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Net income attributable to Antero Midstream Partners LP subsequent to IPO per limited unit partner unit
Common units - basic		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipCommonUnitBasicNetOfTax / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Common units - diluted		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipCommonUnitDilutedNetOfTax / us-gaap_PartnerTypeOfPartnersCapitalAccountAxis = us-gaap_LimitedPartnerMember
Limited Partner (Subordinated units)
Earnings Per Unit [Abstract]
Distribution declared		13,669,000am_DistributionMadeToPartnerCashDistributionsDeclared / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember	[1]
Distributions in excess of earnings		(5,845,000)am_DisributionsInExcessOfEarnings / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember
Net income (loss)		$ 7,824,000us-gaap_IncomeLossAttributableToParent / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember
Weighted average units outstanding:
Subordinated units		75,941,000am_WeightedAverageLimitedPartnershipUnitsOutstandingBasic / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember
Subordinated units - diluted		75,941,000am_WeightedAverageLimitedPartnershipSubordinatedUnitsOutstandingDiluted / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember
Net income attributable to Antero Midstream Partners LP subsequent to IPO per limited unit partner unit
Subordinated units - basic		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipSubordinatedUnitBasicNetOfTax / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember
Subordinated units - diluted		$ 0.10am_NetIncomeLossPerOutstandingLimitedPartnershipSubordinatedUnitDilutedNetOfTax / us-gaap_PartnerCapitalComponentsAxis = am_SubordinatedUnitsMember
[1] On April 15, 2015, we announced that the board of directors of our general partner had declared a quarterly cash distribution of $0.18 per unit, totaling approximately $27.3 million. The distribution is payable on May 27, 2015 to unitholders of record on May 13, 2015.

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