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Fair Value Measurements - Reconciliation of the Net Beginning and Ending Balances for Derivative Instruments (Detail) (Fair Value, Inputs, Level 3, USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Fair Value, Inputs, Level 3 |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |
Beginning balance | $ 548 us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Changes in fair value of derivative instruments | 2,979 rrc_ChangesInFairValueDerivativeInstruments / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member
Settlements received | $ (3,527)us-gaap_DerivativeCashReceivedOnHedge / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member

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- Definition Changes in fair value of derivative instruments. + References No definition available. + Details
Name: | rrc_ChangesInFairValueDerivativeInstruments
Namespace Prefix: | rrc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount of cash received during the period on settlement of a hedge. + References No definition available. + Details
Name: | us-gaap_DerivativeCashReceivedOnHedge
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Fair value as of the balance sheet date of derivative instrument not designated as hedging instrument and classified as an asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 + Details
Name: | us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration