Quarterly report pursuant to Section 13 or 15(d)

Equity-Based Compensation (Details)

v2.4.1.9
Equity-Based Compensation (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 27 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Stock-based compensation expense      
Equity based compensation expense recognized $ 27,783us-gaap_ShareBasedCompensation $ 29,137us-gaap_ShareBasedCompensation  
Number of stock-based compensation awards authorized 16,906,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized   16,906,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Number of shares available for future grant under the Plan 14,765,723us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant   14,765,723us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Midstream Plan      
Stock-based compensation expense      
Number of stock-based compensation awards authorized 10,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= ar_MidstreamLongTermIncentivePlanMember
  10,000,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_AwardTypeAxis
= ar_MidstreamLongTermIncentivePlanMember
Number of shares available for future grant under the Plan 7,640,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= ar_MidstreamLongTermIncentivePlanMember
  7,640,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_AwardTypeAxis
= ar_MidstreamLongTermIncentivePlanMember
Profits interests awards      
Stock-based compensation expense      
Equity based compensation expense recognized 14,718us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= ar_MembershipInterestsAwardsMember
28,689us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= ar_MembershipInterestsAwardsMember
463,000us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= ar_MembershipInterestsAwardsMember
Restricted stock awards      
Stock-based compensation expense      
Equity based compensation expense recognized 8,436us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
309us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
 
Stock options      
Stock-based compensation expense      
Equity based compensation expense recognized 129us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
139us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Antero Midstream Partners Phantom and Restricted Unit Awards      
Stock-based compensation expense      
Equity based compensation expense recognized 4,425us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= ar_AnteroMidstreamPartnersPhantomAndRestrictedUnitAwardsMember
   
Common stock issued to directors in lieu of cash compensation [Member]      
Stock-based compensation expense      
Equity based compensation expense recognized $ 75us-gaap_ShareBasedCompensation
/ us-gaap_AwardTypeAxis
= ar_CommonStockIssuedToDirectorsInLieuOfCashCompensationMember