XML 84 R64.htm IDEA: XBRL DOCUMENT v2.4.1.9
Income Taxes (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Current      
Federal $ 44,887,000us-gaap_CurrentFederalTaxExpenseBenefit $ 56,544,000us-gaap_CurrentFederalTaxExpenseBenefit $ 24,618,000us-gaap_CurrentFederalTaxExpenseBenefit
State (4,387,000)us-gaap_CurrentStateAndLocalTaxExpenseBenefit 10,841,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit 563,000us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Total 40,500,000us-gaap_CurrentIncomeTaxExpenseBenefit 67,385,000us-gaap_CurrentIncomeTaxExpenseBenefit 25,181,000us-gaap_CurrentIncomeTaxExpenseBenefit
Deferred      
Federal (32,375,000)us-gaap_DeferredFederalIncomeTaxExpenseBenefit 111,147,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit 57,704,000us-gaap_DeferredFederalIncomeTaxExpenseBenefit
State (80,192,000)us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 27,233,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit 23,225,000us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit
Total (112,567,000)us-gaap_DeferredIncomeTaxExpenseBenefit 138,380,000us-gaap_DeferredIncomeTaxExpenseBenefit 80,929,000us-gaap_DeferredIncomeTaxExpenseBenefit
Income tax (benefit) expense (72,067,000)us-gaap_IncomeTaxExpenseBenefit 205,765,000us-gaap_IncomeTaxExpenseBenefit 106,110,000us-gaap_IncomeTaxExpenseBenefit
Reconciliation of actual provision for income taxes and provision for income taxes resulting from the use of federal statutory income tax      
Statutory federal income tax rate (as a percent) 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Computed expected federal income tax 11,341,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate 169,938,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate 83,244,000us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Deferred tax adjustment related to change in overall state tax rate (86,956,000)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 15,220,000us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 13,596,000us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
State income tax, net of federal income tax benefit 903,000cog_IncomeTaxReconciliationDeferredTaxAdjustmentRelatedToChangeInOverallStateTaxRate 17,513,000cog_IncomeTaxReconciliationDeferredTaxAdjustmentRelatedToChangeInOverallStateTaxRate 9,609,000cog_IncomeTaxReconciliationDeferredTaxAdjustmentRelatedToChangeInOverallStateTaxRate
Valuation allowance 3,977,000us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 0us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance 262,000us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Uncertain tax positions (1,974,000)cog_EffectiveIncomeTaxRateReconciliationUncertainTaxPositions 2,400,000cog_EffectiveIncomeTaxRateReconciliationUncertainTaxPositions 0cog_EffectiveIncomeTaxRateReconciliationUncertainTaxPositions
Other, net 642,000us-gaap_IncomeTaxReconciliationOtherAdjustments 694,000us-gaap_IncomeTaxReconciliationOtherAdjustments (601,000)us-gaap_IncomeTaxReconciliationOtherAdjustments
Income tax (benefit) expense (72,067,000)us-gaap_IncomeTaxExpenseBenefit 205,765,000us-gaap_IncomeTaxExpenseBenefit 106,110,000us-gaap_IncomeTaxExpenseBenefit
Deferred Tax Assets      
Net operating loss carryforward 141,961,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 78,182,000us-gaap_DeferredTaxAssetsOperatingLossCarryforwards  
Alternative minimum tax carryforward 227,719,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax 182,212,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax  
Foreign tax credit 4,525,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign 4,822,000us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsForeign  
Derivative instruments 0cog_DeferredTaxAssetsDerivativeAndHedgingTransactions 3,946,000cog_DeferredTaxAssetsDerivativeAndHedgingTransactions  
Incentive compensation 21,961,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation 36,450,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation  
Deferred compensation 9,531,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost 11,988,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost  
Post-retirement benefits 13,689,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits 13,965,000us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits  
Other 747,000us-gaap_DeferredTaxAssetsOther 3,619,000us-gaap_DeferredTaxAssetsOther  
Total 420,133,000us-gaap_DeferredTaxAssetsNet 335,184,000us-gaap_DeferredTaxAssetsNet  
Deferred Tax Liabilities      
Properties and equipment 1,248,532,000us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment 1,321,241,000us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment  
Deferred Tax Liabilities, Derivatives 50,750,000us-gaap_DeferredTaxLiabilitiesDerivatives 0us-gaap_DeferredTaxLiabilitiesDerivatives  
Total 1,299,282,000us-gaap_DeferredTaxLiabilities 1,321,241,000us-gaap_DeferredTaxLiabilities  
Net deferred tax liabilities 879,149,000us-gaap_DeferredTaxAssetsLiabilitiesNet 986,057,000us-gaap_DeferredTaxAssetsLiabilitiesNet  
State tax effected net operating losses      
Tax benefits related to employee stock-based compensation not reflected in deferred tax assets 108,600,000cog_EmployeeServiceSharebasedCompensationTaxBenefitIncludedInOperatingLossCarryforwardButNotReflectedInDeferredTaxAssets    
Reconciliation of unrecognized tax benefits      
Balance at beginning of year 3,700,000us-gaap_UnrecognizedTaxBenefits 0us-gaap_UnrecognizedTaxBenefits 0us-gaap_UnrecognizedTaxBenefits
Additions based on tax provisions related to the current year 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 3,700,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Additions for tax positions of prior years 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
Reductions for tax positions of prior years (3,037,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions 0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions 0us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions
Settlements 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities 0us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromSettlementsWithTaxingAuthorities
Balance at end of year 663,000us-gaap_UnrecognizedTaxBenefits 3,700,000us-gaap_UnrecognizedTaxBenefits 0us-gaap_UnrecognizedTaxBenefits
State Tax Reporting      
State tax effected net operating losses      
Net operating loss carryforwards 483,700,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_StateAndLocalJurisdictionMember		    
Federal      
State tax effected net operating losses      
Net operating loss carryforwards $ 399,800,000us-gaap_OperatingLossCarryforwards
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember