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Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Costs Incurred for Property Acquisition, Exploration and Development (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items] |  |  |  |  |  |
Acquisition Costs, Period Cost | $ 404,252 rrc_CostsIncurredAcquisitionOfOilAndGasPropertiesFromBusinessCombination | [1],[2] |  |  |  |
Asset retirement obligations | 56,822 us-gaap_CostsIncurredAssetRetirementObligationIncurred | [1] | 76,373 us-gaap_CostsIncurredAssetRetirementObligationIncurred | [1] | 57,982 us-gaap_CostsIncurredAssetRetirementObligationIncurred | [1]
Conger Exchange Transaction |  |  |  |  |  |
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items] |  |  |  |  |  |
Asset retirement obligations | 11,900 us-gaap_CostsIncurredAssetRetirementObligationIncurred / dei_LegalEntityAxis = rrc_CongerExchangeTransactionMember |  |  |  |  |
Gas Gathering Assets |  |  |  |  |  |
Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities [Line Items] |  |  |  |  |  |
Acquisition Costs, Period Cost | $ 134,800 rrc_CostsIncurredAcquisitionOfOilAndGasPropertiesFromBusinessCombination / us-gaap_PropertyPlantAndEquipmentByTypeAxis = us-gaap_GasGatheringAndProcessingEquipmentMember |  |  |  |  |
[1] | Includes cost incurred whether capitalized or expensed.
[2] | See also Note 3 for additional information related to the Conger Exchange which includes $134.8 million of gas gathering assets received in the exchange and $11.9 million of asset retirement obligations added in the exchange.

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- Definition Cost incurred, including capitalized costs and costs charged to expense, in acquisition of oil and gas properties associated with business combination. + References No definition available. + Details
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- Definition Amount of asset retirement obligations (ARO) costs incurred (whether capitalized or charged to expense) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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