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Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Standardized Measure of Discounted Future Net Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
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Extractive Industries [Abstract] |  |  |  |  |  |
Future cash inflows | $ 46,507,646 us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows |  | $ 35,143,097 us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows |  |  |
Future costs: |  |  |  |  |  |
Production | (15,239,210)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts |  | (10,176,140)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts |  |  |
Development | (4,275,693)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts | [1] | (3,938,296)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts | [1] |  |
Future net cash flows before income taxes | 26,992,743 rrc_DiscountedFutureNetCashFlowsRelatingToProveOilAndGasReservesFutureIncomeBeforeTaxExpense |  | 21,028,661 rrc_DiscountedFutureNetCashFlowsRelatingToProveOilAndGasReservesFutureIncomeBeforeTaxExpense |  |  |
Future income tax expense | (8,900,383)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense |  | (6,913,196)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense |  |  |
Total future net cash flows before 10% discount | 18,092,360 us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows |  | 14,115,465 us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows |  |  |
10% annual discount | (10,499,333)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows |  | (8,253,234)us-gaap_FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows |  |  |
Standardized measure of discounted future net cash flows | $ 7,593,027 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves |  | $ 5,862,231 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves |  | $ 3,223,805 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves | $ 4,514,897 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
[1] | 2014 includes $439.6 million of undiscounted future asset retirement costs estimated as of December 31, 2014, using current estimates of future abandonment costs.

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- Definition This amount is the future net cash flows less the computed discount prior to the impact of tax expense and discount. + References No definition available. + Details
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- Definition Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62424-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 31 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62455-109447 + Details
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- Definition Amount of estimated future accumulated cash outflow for costs to be incurred in developing proved oil and gas reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62424-109447 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 31 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62455-109447 + Details
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