v2.4.1.9

Consolidated Statements of Equity (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015
Class of Stock [Line Items]
Net income and comprehensive income	$ 15,648us-gaap_IncomeLossAttributableToParent
Equity-based compensation	4,623us-gaap_ShareBasedCompensation
Distribution to unitholders	(14,322)us-gaap_PartnersCapitalAccountDistributions
Net income (loss) and comprehensive income (loss)	15,648us-gaap_NetIncomeLossAllocatedToLimitedPartners
Balance	1,348,408us-gaap_PartnersCapital
Common Unitholders Public [Member]
Class of Stock [Line Items]
Net income and comprehensive income	4,740us-gaap_IncomeLossAttributableToParent / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember
Equity-based compensation	1,122us-gaap_ShareBasedCompensation / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember
Distribution to unitholders	(4,338)us-gaap_PartnersCapitalAccountDistributions / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember
Balance	1,091,561us-gaap_PartnersCapital / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersPublicMember
Common Unitholders Antero [Member]
Class of Stock [Line Items]
Net income and comprehensive income	3,084us-gaap_IncomeLossAttributableToParent / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember
Equity-based compensation	1,648us-gaap_ShareBasedCompensation / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember
Distribution to unitholders	(2,823)us-gaap_PartnersCapitalAccountDistributions / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember
Balance	73,574us-gaap_PartnersCapital / us-gaap_StatementClassOfStockAxis = am_CommonUnitholdersAnteroMember
Subordinated Unitholder Antero [Member]
Class of Stock [Line Items]
Net income and comprehensive income	7,824us-gaap_IncomeLossAttributableToParent / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember
Equity-based compensation	1,853us-gaap_ShareBasedCompensation / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember
Distribution to unitholders	(7,161)us-gaap_PartnersCapitalAccountDistributions / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember
Balance	$ 183,273us-gaap_PartnersCapital / us-gaap_StatementClassOfStockAxis = am_SubordinatedUnitholderAnteroMember

X

- Details

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

X

- Definition

The portion of profit or loss for the period which is attributable to the parent.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 225



-SubTopic 10



-Section S99



-Paragraph 2



-Subparagraph (SX 210.5-03.20)



-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

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

X

- 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

X

- 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

Name:	us-gaap_PartnersCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

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

+ 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 5



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

+ Details

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

X

- 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

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

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=am_CommonUnitholdersAnteroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=am_CommonUnitholdersPublicMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementClassOfStockAxis=am_SubordinatedUnitholderAnteroMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: