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Asset Retirement Obligations - Asset Retirement Obligations (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Asset Retirement Obligation [Abstract]    
Beginning of period $ 230,077us-gaap_AssetRetirementObligation $ 146,478us-gaap_AssetRetirementObligation
Liabilities incurred 8,602us-gaap_AssetRetirementObligationLiabilitiesIncurred 8,731us-gaap_AssetRetirementObligationLiabilitiesIncurred
Acquisitions 11,927rrc_AssetRetirementObligationAcquisitions  
Liability released (8,309)rrc_AssetRetirementObligationLiabilityReleased  
Liabilities settled (4,442)us-gaap_AssetRetirementObligationLiabilitiesSettled (424)us-gaap_AssetRetirementObligationLiabilitiesSettled
Disposition of wells (13,951)rrc_AssetRetirementObligationDispositionOfWells (3,129)rrc_AssetRetirementObligationDispositionOfWells
Accretion expense 15,226us-gaap_AssetRetirementObligationAccretionExpense 10,778us-gaap_AssetRetirementObligationAccretionExpense
Change in estimate 48,333us-gaap_AssetRetirementObligationRevisionOfEstimate 67,643us-gaap_AssetRetirementObligationRevisionOfEstimate
End of period 287,463us-gaap_AssetRetirementObligation 230,077us-gaap_AssetRetirementObligation
Less current portion (15,067)us-gaap_AssetRetirementObligationCurrent (5,037)us-gaap_AssetRetirementObligationCurrent
Long-term asset retirement obligations $ 272,396us-gaap_AssetRetirementObligationsNoncurrent $ 225,040us-gaap_AssetRetirementObligationsNoncurrent