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Fair Value Measurements - Value of Assets Measured at Fair Value on Non Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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] |  |  |  |  |  |  |
Impairment | $ 3,033 us-gaap_AssetImpairmentCharges | $ 24,991 us-gaap_AssetImpairmentCharges | $ 7,012 us-gaap_AssetImpairmentCharges | $ 741 us-gaap_AssetImpairmentCharges | $ 28,024 us-gaap_AssetImpairmentCharges | $ 7,753 us-gaap_AssetImpairmentCharges | $ 35,554 us-gaap_AssetImpairmentCharges
Fair Value, Measurements, Nonrecurring | Natural Gas and Oil Properties |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Fair Value | 15,605 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OilAndGasPropertiesMember |  |  |  | 15,605 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OilAndGasPropertiesMember | 500 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OilAndGasPropertiesMember | 12,604 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OilAndGasPropertiesMember
Impairment |  |  |  |  | 28,024 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OilAndGasPropertiesMember | 7,012 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OilAndGasPropertiesMember | 34,273 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_OilAndGasPropertiesMember
Fair Value, Measurements, Nonrecurring | Surface Property |  |  |  |  |  |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |  |  |  |  |  |
Fair Value |  |  |  |  |  | 5,550 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = rrc_SurfacePropertyMember | 6,269 us-gaap_PropertyPlantAndEquipmentFairValueDisclosure / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = rrc_SurfacePropertyMember
Impairment |  |  |  |  |  | $ 741 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = rrc_SurfacePropertyMember | $ 1,281 us-gaap_AssetImpairmentCharges / us-gaap_FairValueByMeasurementFrequencyAxis = us-gaap_FairValueMeasurementsNonrecurringMember / us-gaap_PropertyPlantAndEquipmentByTypeAxis = rrc_SurfacePropertyMember

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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 Fair value portion of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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