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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

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Equity-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended		24 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Stock-based compensation expense
Equity based compensation expense recognized	$ 112,252us-gaap_ShareBasedCompensation	$ 365,280us-gaap_ShareBasedCompensation	$ 449,000us-gaap_ShareBasedCompensation
Number of stock-based compensation awards authorized	16,906,500		16,906,500
Number of shares available for future grant under the Plan	14,819,823		14,819,823
Midstream Plan
Stock-based compensation expense
Number of stock-based compensation awards authorized	10,000,000		10,000,000
Number of shares available for future grant under the Plan	7,618,560		7,618,560
Profits interests awards
Stock-based compensation expense
Equity based compensation expense recognized	83,615	364,957
Restricted stock awards
Stock-based compensation expense
Equity based compensation expense recognized	25,624	219
Stock options
Stock-based compensation expense
Equity based compensation expense recognized	501	104
Antero Midstream Partners Phantom and Restricted Unit Awards
Stock-based compensation expense
Equity based compensation expense recognized	2,360
Common stock issued to directors in lieu of cash compensation [Member]
Stock-based compensation expense
Equity based compensation expense recognized	$ 152