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Income Taxes - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended
--- | --- | ---
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
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income tax expense | $ 166,048,000 us-gaap_IncomeTaxExpenseBenefit | $ 93,522,000 us-gaap_IncomeTaxExpenseBenefit | $ 117,976,000 us-gaap_IncomeTaxExpenseBenefit | $ 18,957,000 us-gaap_IncomeTaxExpenseBenefit | $ (28,323,000)us-gaap_IncomeTaxExpenseBenefit | $ 11,866,000 us-gaap_IncomeTaxExpenseBenefit | $ 97,494,000 us-gaap_IncomeTaxExpenseBenefit | $ (47,180,000)us-gaap_IncomeTaxExpenseBenefit | $ 396,503,000 us-gaap_IncomeTaxExpenseBenefit | $ 33,857,000 us-gaap_IncomeTaxExpenseBenefit | $ 12,054,000 us-gaap_IncomeTaxExpenseBenefit
Net deferred tax assets (liabilities) | (1,113,082,000)us-gaap_DeferredTaxAssetsLiabilitiesNet |  |  |  | (720,566,000)us-gaap_DeferredTaxAssetsLiabilitiesNet |  |  |  | (1,113,082,000)us-gaap_DeferredTaxAssetsLiabilitiesNet | (720,566,000)us-gaap_DeferredTaxAssetsLiabilitiesNet |
Deductible limit | 1,000,000 rrc_IRCDeductibleLimit |  |  |  |  |  |  |  | 1,000,000 rrc_IRCDeductibleLimit |  |
Regular net operating loss carryforwards | 641,400,000 us-gaap_OperatingLossCarryforwards |  |  |  |  |  |  |  | 641,400,000 us-gaap_OperatingLossCarryforwards |  |
Alternative minimum tax carryforwards | 557,300,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax |  |  |  |  |  |  |  | 557,300,000 us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax |  |
Deferred tax asset related to regular NOL | 130,800,000 rrc_DeferredTaxAssetRelatedToNolCarryforwardNetOfStockCompensationReductionForUnrealizedBenefits |  |  |  |  |  |  |  | 130,800,000 rrc_DeferredTaxAssetRelatedToNolCarryforwardNetOfStockCompensationReductionForUnrealizedBenefits |  |
Accrued interest or penalties related to tax amounts | 0 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued |  |  |  |  |  |  |  | 0 us-gaap_IncomeTaxExaminationPenaltiesAndInterestAccrued |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Period during which net operating loss carryforwards and alternative minimum tax expire |  |  |  |  |  |  |  |  | Dec. 31, 2018 |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Period during which net operating loss carryforwards and alternative minimum tax expire |  |  |  |  |  |  |  |  | Dec. 31, 2034 |  |
Oklahoma |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Valuation allowance on the deferred compensation plan | 8,800,000 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = stpr_OK |  |  |  |  |  |  |  | 8,800,000 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_IncomeTaxAuthorityAxis = stpr_OK |  |
Deferred compensation plan |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
Valuation allowance on the deferred compensation plan | 7,800,000 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_TaxCreditCarryforwardAxis = us-gaap_DeferredCompensationShareBasedPaymentsMember |  |  |  |  |  |  |  | 7,800,000 us-gaap_DeferredTaxAssetsValuationAllowance / us-gaap_TaxCreditCarryforwardAxis = us-gaap_DeferredCompensationShareBasedPaymentsMember |  |
Alternative Minimum Tax |  |  |  |  |  |  |  |  |  |  |
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |
AMT credit carryforwards that are not subject to limitation or expiration | $ 665,000 us-gaap_TaxCreditCarryforwardAmount / us-gaap_TaxCreditCarryforwardAxis = rrc_AlternativeMinimumTaxMember |  |  |  |  |  |  |  | $ 665,000 us-gaap_TaxCreditCarryforwardAmount / us-gaap_TaxCreditCarryforwardAxis = rrc_AlternativeMinimumTaxMember |  |

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- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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