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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.