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Derivative Activities - Effects of Cash Flow Hedges and Other Hedges on Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Change in Hedge Derivative Fair Value |  |  |  |  |  |  |  |  |  |  | $ (4,203)us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments |  |
Realized Gain Reclassified from OCI Into Revenue | 872,214 us-gaap_Revenues | 616,615 us-gaap_Revenues | 765,524 us-gaap_Revenues | 457,342 us-gaap_Revenues | 428,086 us-gaap_Revenues | 442,038 us-gaap_Revenues | 673,356 us-gaap_Revenues | 319,239 us-gaap_Revenues | 2,711,695 us-gaap_Revenues |  | 1,862,719 us-gaap_Revenues |  | 1,457,704 us-gaap_Revenues
Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Realized Gain Reclassified from OCI Into Revenue |  |  |  |  |  |  |  |  | 6,236 us-gaap_Revenues / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] | 73,470 us-gaap_Revenues / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] |
Tax Effect |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Change in Hedge Derivative Fair Value |  |  |  |  |  |  |  |  |  |  | 2,687 us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments / rrc_DerivativeTaxEffectAxis = rrc_TaxEffectMember |  |
Tax Effect | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Realized Gain Reclassified from OCI Into Revenue |  |  |  |  |  |  |  |  | (3,986)us-gaap_Revenues / rrc_DerivativeTaxEffectAxis = rrc_TaxEffectMember / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] | (46,973)us-gaap_Revenues / rrc_DerivativeTaxEffectAxis = rrc_TaxEffectMember / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] |
Swaps | Before Tax |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Change in Hedge Derivative Fair Value |  |  |  |  |  |  |  |  |  |  | 125 us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / rrc_DerivativeTaxEffectAxis = rrc_BeforeTaxMember |  |
Swaps | Before Tax | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Realized Gain Reclassified from OCI Into Revenue |  |  |  |  |  |  |  |  | 4,544 us-gaap_Revenues / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / rrc_DerivativeTaxEffectAxis = rrc_BeforeTaxMember / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] | 15,171 us-gaap_Revenues / us-gaap_DerivativeByNatureAxis = us-gaap_SwapMember / rrc_DerivativeTaxEffectAxis = rrc_BeforeTaxMember / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] |
Collars | Before Tax |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Change in Hedge Derivative Fair Value |  |  |  |  |  |  |  |  |  |  | (7,015)us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments / us-gaap_DerivativeByNatureAxis = rrc_CollarsMember / rrc_DerivativeTaxEffectAxis = rrc_BeforeTaxMember |  |
Collars | Before Tax | Reclassification out of Accumulated Other Comprehensive Income |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Realized Gain Reclassified from OCI Into Revenue |  |  |  |  |  |  |  |  | $ 5,678 us-gaap_Revenues / us-gaap_DerivativeByNatureAxis = rrc_CollarsMember / rrc_DerivativeTaxEffectAxis = rrc_BeforeTaxMember / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] | $ 105,272 us-gaap_Revenues / us-gaap_DerivativeByNatureAxis = rrc_CollarsMember / rrc_DerivativeTaxEffectAxis = rrc_BeforeTaxMember / us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeAxis = us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeMember | [1] |
[1] | For gains upon contract settlement, the reduction in AOCI is offset by an increase in natural gas, NGLs and oil sales. For losses upon contract settlement, the increase in AOCI is offset by a decrease in natural gas, NGLs and oil sales.

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