Represents the allocation of the net investment to the unitholders.

No definition available.

Name:	am_AllocationNetInvestmentToUnitholders
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Total net deemed contribution from parent

+ References

No definition available.

+ Details

Name:	am_DeemedContributionFromParentNet
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to Antero Midstream Partners LP subsequent to the IPO.

+ References

No definition available.

+ Details

Name:	am_NetIncomeLossAttributableAnteroMidstreamPartnersLpPostIpo
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of the parent's net investment in the entity.

+ References

No definition available.

+ Details

Name:	am_ParentNetInvestment
Namespace Prefix:	am_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_ClassOfStockLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate amount of net income allocated to limited partners.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

+ Details

Name:	us-gaap_NetIncomeLossAllocatedToLimitedPartners
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The amount of ownership interest of different classes of partners in limited partnership.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: 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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-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 4: http://www.xbrl.org/2003/role/presentationRef

-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

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Total distributions to each class of partners (i.e., general, limited and preferred partners).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Monetary value of the issuance of new units of limited partnership interest in a public offering.

+ References

+ Details

Name:	us-gaap_PartnersCapitalAccountPublicSaleOfUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Consolidated Statements of Equity (USD $) In Thousands, unless otherwise specified	Parent [Member] Predecessor	Common Unitholders Public [Member]	Common Unitholders Antero [Member]	Subordinated Unitholder Antero [Member]	Total
Balance at Dec. 31, 2011	$ 29,002				$ 29,002am_ParentNetInvestment
Class of Stock [Line Items]
Net income (loss) and comprehensive income (loss)	(4,586)				(4,586)
Deemed contribution from parent, net	118,446				118,446am_DeemedContributionFromParentNet
Balance at Dec. 31, 2012	142,862				142,862am_ParentNetInvestment
Class of Stock [Line Items]
Net income (loss) and comprehensive income (loss)	(14,332)				(14,332)
Deemed contribution from parent, net	388,059				388,059am_DeemedContributionFromParentNet
Equity-based compensation	15,931				15,931us-gaap_ShareBasedCompensation
Balance at Dec. 31, 2013					532,520us-gaap_PartnersCapital
Balance at Dec. 31, 2013	532,520				532,520am_ParentNetInvestment
Class of Stock [Line Items]
Net income (loss) and comprehensive income (loss)	9,410				9,410
Deemed contribution from parent, net	29,764				29,764am_DeemedContributionFromParentNet
Equity-based compensation	6,351				6,351us-gaap_ShareBasedCompensation
Balance at Nov. 10, 2014	578,045				578,045am_ParentNetInvestment
Class of Stock [Line Items]
Alloction of net investment to unitholders	(578,045)		163,458	414,587
Net proceeds from IPO		1,087,224			1,087,224
Distribution to Antero			(94,023)	(238,477)	(332,500)
Net income loss attributable Antero Midstream Partners LP Post Ipo		2,248	1,463	3,711	7,422
Equity-based compensation		565	767	936	2,268us-gaap_ShareBasedCompensation
Balance at Dec. 31, 2014		$ 1,090,037	$ 71,665	$ 180,757	$ 1,342,459us-gaap_PartnersCapital