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v2.4.1.9

Supplemental Gas Data PV-10 Reconciliation (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 MMcf | Dec. 31, 2013 MMcf | Dec. 31, 2012 MMcf | Dec. 31, 2011 MMcf
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items] |  |  |  |
Beginning reserves | 6,827,616,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet | 5,731,214,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet | 3,993,458,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet | 3,480,027,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet
Revenues | $ 28,502,852 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows | $ 21,602,594 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows | $ 11,777,550 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows |
Net changes in sales prices and production costs | 517,731 us-gaap_NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts | 1,295,956 us-gaap_NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts | (1,480,573)us-gaap_NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts |
Net changes in sales prices and production costs | (559,563)us-gaap_SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts | (365,477)us-gaap_SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts | (104,518)us-gaap_SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts |
Net change due to revisions in quantity estimates | 151,233 us-gaap_RevisionsOfPreviousQuantityEstimates | 132,900 us-gaap_RevisionsOfPreviousQuantityEstimates | (104,158)us-gaap_RevisionsOfPreviousQuantityEstimates |
Net change due to extensions, discoveries and improved recovery | 418,775 us-gaap_ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts | 383,308 us-gaap_ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts | 14,645 us-gaap_ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts |
Development costs incurred during the period | 952,733 us-gaap_PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod | 625,824 us-gaap_PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod | 333,640 us-gaap_PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod |
Difference in previously estimated development costs compared to actual costs incurred during the period | (102,949)us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther | (123,976)us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther | (96,749)us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther |
Changes in estimated future development costs | 595,221 us-gaap_IncreaseDecreaseInEstimatedFutureDevelopmentCosts | (486,518)us-gaap_IncreaseDecreaseInEstimatedFutureDevelopmentCosts | (153,104)us-gaap_IncreaseDecreaseInEstimatedFutureDevelopmentCosts |
Net change in future income taxes | (798,470)us-gaap_IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves | (578,951)us-gaap_IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves | 619,045 us-gaap_IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves |
Accretion of discount and other | 128,636 us-gaap_AccretionOfDiscount | 61,539 us-gaap_AccretionOfDiscount | (39,203)us-gaap_AccretionOfDiscount |
Total discounted cash flow at end of period | 2,984,158 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves | 1,680,811 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves | 736,206 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves | 1,747,181 us-gaap_StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves
Production costs | (10,100,868)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts1 | (7,105,962)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts1 | (4,823,670)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts1 |
Development costs | (3,368,621)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts1 | (3,902,875)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts1 | (2,450,589)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts1 |
Income tax expense | (5,711,989)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense1 | (4,025,626)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense1 | (1,711,251)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense1 |
Future Net Cash Flows | 9,321,374 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows | 6,568,131 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows | 2,792,040 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows |
Discounted to present value at a 10% annual rate | (6,337,216)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows | (4,887,320)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows | (2,055,834)us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows |
Total standardized measure of discounted net cash flows | $ 2,984,158 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure | $ 1,680,811 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure | $ 736,206 us-gaap_DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure |
Natural Gas [Member] |  |  |  |
Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves [Line Items] |  |  |  |
Beginning reserves | 6,317,600,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet / us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis = us-gaap_NaturalGasReservesMember | 5,585,107,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet / us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis = us-gaap_NaturalGasReservesMember | 3,905,437,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet / us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis = us-gaap_NaturalGasReservesMember | 3,470,551,000 us-gaap_ProvedDevelopedAndUndevelopedReservesNet / us-gaap_AverageSalesPriceAndProductionCostsPerUnitOfProductionProductionTypeAxis = us-gaap_NaturalGasReservesMember

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- Definition Amount of estimated future cash inflows from 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 cost 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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- Definition Amount of estimated future income tax expense to be incurred based on the future income less future expense derived from production and 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 (c) -URI http://asc.fasb.org/extlink&oid=8451039&loc=d3e62455-109447 + Details
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