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Fair Value Measurements - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Jun. 30, 2014 | Sep. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Interest and dividends |  |  |  |  | $ 911,000 us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue | $ 1,200,000 us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue | $ 1,400,000 us-gaap_InterestAndDividendIncomeSecuritiesTradingOrMeasuredAtFairValue
Mark-to-market gain (loss) |  |  |  |  | (2,400,000)us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss | 3,900,000 us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss | 4,700,000 us-gaap_TradingSecuritiesUnrealizedHoldingGainLoss
Impairment | 3,033,000 us-gaap_AssetImpairmentCharges | 24,991,000 us-gaap_AssetImpairmentCharges | 7,012,000 us-gaap_AssetImpairmentCharges | 741,000 us-gaap_AssetImpairmentCharges | 28,024,000 us-gaap_AssetImpairmentCharges | 7,753,000 us-gaap_AssetImpairmentCharges | 35,554,000 us-gaap_AssetImpairmentCharges
Mississippi |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment on natural gas and oil properties |  |  |  |  | 5,500,000 us-gaap_ImpairmentOfOilAndGasProperties / us-gaap_StatementGeographicalAxis = stpr_MS |  | 31,100,000 us-gaap_ImpairmentOfOilAndGasProperties / us-gaap_StatementGeographicalAxis = stpr_MS
West Texas |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment on natural gas and oil properties |  |  |  |  | 18,500,000 us-gaap_ImpairmentOfOilAndGasProperties / us-gaap_StatementGeographicalAxis = rrc_WestTexasMember |  |
North Texas |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment on natural gas and oil properties |  |  |  |  | 4,000,000 us-gaap_ImpairmentOfOilAndGasProperties / us-gaap_StatementGeographicalAxis = rrc_TXMember |  | 3,200,000 us-gaap_ImpairmentOfOilAndGasProperties / us-gaap_StatementGeographicalAxis = rrc_TXMember
Gulf Coast |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment on natural gas and oil properties |  |  |  |  |  | 7,000,000 us-gaap_ImpairmentOfOilAndGasProperties / us-gaap_StatementGeographicalAxis = rrc_GulfCoastMember |
Surface Property | Fair Value, Measurements, Nonrecurring |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Impairment |  |  |  |  |  | $ 741,000 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = rrc_SurfacePropertyMember | $ 1,281,000 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = rrc_SurfacePropertyMember
Basis Swaps | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Number of natural gas basis swap | 0 us-gaap_DerivativeNumberOfInstrumentsHeld / us-gaap_DerivativeByNatureAxis = us-gaap_BasisSwapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |  |  |  | 0 us-gaap_DerivativeNumberOfInstrumentsHeld / us-gaap_DerivativeByNatureAxis = us-gaap_BasisSwapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member | 4 us-gaap_DerivativeNumberOfInstrumentsHeld / us-gaap_DerivativeByNatureAxis = us-gaap_BasisSwapMember / us-gaap_FairValueByFairValueHierarchyLevelAxis = us-gaap_FairValueInputsLevel3Member |

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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2420-110228 + Details
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- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. + 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 (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 35 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=28370743&loc=d3e66150-109466 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2921-110230 + Details
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