$CNR
Core Natural Resources, Inc. Stock $cnr

$cnr Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000171036618000006 Filed on February 16, 2018

Income Statement

Concept	2017 Q4	2017 Q3	2017 Q2
Revenue	$352.3M	$335.3M	$352.1M
YoY Change	-6.89%	13.52%	19.49%
Cost Of Revenue	$21.80M	$21.80M	$17.80M
YoY Change	74.4%	131.91%	56.14%
Gross Profit	$325.2M	$313.6M	$328.3M
YoY Change	-10.71%	9.8%	17.67%
Gross Profit Margin	92.3%	93.52%	93.25%
Selling, General & Admin	$25.01M	$21.18M	$20.34M
YoY Change	25.98%	74.22%	94.44%
% of Gross Profit	7.69%	6.75%	6.19%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$47.09M	$46.65M	$25.27M
YoY Change	-6.38%	-6.41%	-13.8%
% of Gross Profit	14.48%	14.88%	7.7%
Operating Expenses	$204.3M	$229.5M	$222.9M
YoY Change	-19.54%	6.35%	-1.49%
Operating Profit	$120.9M	$84.07M	$105.4M
YoY Change	9.61%	20.49%	99.87%
Interest Expense	$14.27M	$3.862M	$3.944M
YoY Change	250.18%	10.95%	17.49%
% of Operating Profit	11.8%	4.59%	3.74%
Other Income/Expense, Net
YoY Change
Pretax Income	$39.80M	$12.29M	$61.86M
YoY Change	5.47%	162.28%	348.5%
Income Tax	$64.44M	$3.770M	$9.611M
% Of Pretax Income	161.91%	30.68%	15.54%
Net Earnings	-$29.01M	$7.728M	$47.93M
YoY Change	-256.82%	208.75%	276.77%
Net Earnings / Revenue	-8.23%	2.3%	13.62%
Basic Earnings Per Share	-$1.04	$0.28	$1.71
Diluted Earnings Per Share	-$1.04	$0.00	$0.00
COMMON SHARES
Basic Shares Outstanding	27.97M shares	27.97M shares	27.97M shares
Diluted Shares Outstanding		27.97M shares	27.97M shares

Balance Sheet

Concept	2017 Q4	2017 Q3	2017 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$154.0M	$3.700M	$6.700M
YoY Change
Cash & Equivalents	$154.0M	$3.697M	$6.739M
Short-Term Investments
Other Short-Term Assets	$23.70M	$21.90M	$12.40M
YoY Change
Inventory	$53.42M	$52.00M	$60.30M
Prepaid Expenses	$23.74M	$21.86M
Receivables	$131.5M	$101.0M	$107.0M
Other Receivables	$36.55M	$13.31M	$17.50M
Total Short-Term Assets	$399.2M	$191.9M	$203.9M
YoY Change	99.49%
LONG-TERM ASSETS
Property, Plant & Equipment	$2.122B	$2.096B	$2.118B
YoY Change	-2.66%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$185.6M	$300.7M	$304.3M
YoY Change	-39.56%
Total Long-Term Assets	$2.308B	$2.397B	$2.423B
YoY Change	-7.21%
TOTAL ASSETS
Total Short-Term Assets	$399.2M	$191.9M	$203.9M
Total Long-Term Assets	$2.308B	$2.397B	$2.423B
Total Assets	$2.707B	$2.589B	$2.627B
YoY Change	0.73%	-6.54%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$109.1M	$90.25M	$72.30M
YoY Change	31.61%
Accrued Expenses	$290.6M	$269.0M	$274.6M
YoY Change	-0.51%
Deferred Revenue	$6.807M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$19.32M	$373.0K	$3.600M
YoY Change	5079.09%
Total Short-Term Liabilities	$422.2M	$362.8M	$359.3M
YoY Change	11.37%
LONG-TERM LIABILITIES
Long-Term Debt	$856.7M	$289.6M	$301.5M
YoY Change	183.82%
Other Long-Term Liabilities	$24.04M	$13.87M	$1.140B
YoY Change	60.85%
Total Long-Term Liabilities	$880.7M	$303.5M	$1.441B
YoY Change	178.02%
TOTAL LIABILITIES
Total Short-Term Liabilities	$422.2M	$362.8M	$359.3M
Total Long-Term Liabilities	$880.7M	$303.5M	$1.441B
Total Liabilities	$2.363B	$1.792B	$1.943B
YoY Change	25.23%
SHAREHOLDERS EQUITY
Retained Earnings	-$43.71M
YoY Change
Common Stock	$280.0K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$204.3M	$657.6M	$684.1M
YoY Change
Total Liabilities & Shareholders Equity	$2.707B	$2.589B	$2.627B
YoY Change	0.73%

Cashflow Statement

Concept	2017 Q4	2017 Q3	2017 Q2
OPERATING ACTIVITIES
Net Income	-$29.01M	$7.728M	$47.93M
YoY Change	-256.82%	208.75%	276.77%
Depreciation, Depletion And Amortization	$47.09M	$46.65M	$25.27M
YoY Change	-6.38%	-6.41%	-13.8%
Cash From Operating Activities	$76.40M	$67.70M	$55.50M
YoY Change	-51.86%	-10.09%	-16.67%
INVESTING ACTIVITIES
Capital Expenditures	-$30.40M	-$27.80M	-$14.20M
YoY Change	178.9%	79.35%	5.19%
Acquisitions
YoY Change
Other Investing Activities	$6.700M	$900.0K	$7.300M
YoY Change	139.29%	125.0%	82.5%
Cash From Investing Activities	-$23.70M	-$26.90M	-$6.900M
YoY Change	189.02%	79.33%	-27.37%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	97.60M	-43.80M	-48.50M
YoY Change	-167.92%	-30.48%	-15.94%
NET CHANGE
Cash From Operating Activities	76.40M	67.70M	55.50M
Cash From Investing Activities	-23.70M	-26.90M	-6.900M
Cash From Financing Activities	97.60M	-43.80M	-48.50M
Net Change In Cash	150.3M	-3.000M	100.0K
YoY Change	2110.29%	11.11%	-116.67%
FREE CASH FLOW
Cash From Operating Activities	$76.40M	$67.70M	$55.50M
Capital Expenditures	-$30.40M	-$27.80M	-$14.20M
Free Cash Flow	$106.8M	$95.50M	$69.70M
YoY Change	-37.03%	5.18%	-12.98%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2016Q4	ceix	Accrued Payroll And Employee Benefits Current AccruedPayrollAndEmployeeBenefitsCurrent	17326000	USD
CY2017Q4	ceix	Accrued Payroll And Employee Benefits Current AccruedPayrollAndEmployeeBenefitsCurrent	14689000	USD
CY2016Q4	ceix	Accrued Subsidence Liability Current AccruedSubsidenceLiabilityCurrent	104437000	USD
CY2017Q4	ceix	Accrued Subsidence Liability Current AccruedSubsidenceLiabilityCurrent	88027000	USD
CY2016	ceix	Asset Retirement Obligation Other Change AssetRetirementObligationOtherChange	514000	USD
CY2017	ceix	Asset Retirement Obligation Other Change AssetRetirementObligationOtherChange	-1641000	USD
CY2017Q4	ceix	Capital Leases Future Minimum Sublease Rentals Duein Rolling Twelve Months CapitalLeasesFutureMinimumSubleaseRentalsDueinRollingTwelveMonths	3699000	USD
CY2017Q4	ceix	Capital Leases Future Minimum Sublease Rentals Duein Rolling Year Five CapitalLeasesFutureMinimumSubleaseRentalsDueinRollingYearFive	0	USD
CY2017Q4	ceix	Capital Leases Future Minimum Sublease Rentals Duein Rolling Year Four CapitalLeasesFutureMinimumSubleaseRentalsDueinRollingYearFour	2157000	USD
CY2017Q4	ceix	Capital Leases Future Minimum Sublease Rentals Duein Rolling Year Three CapitalLeasesFutureMinimumSubleaseRentalsDueinRollingYearThree	3699000	USD
CY2017Q4	ceix	Capital Leases Future Minimum Sublease Rentals Duein Rolling Year Two CapitalLeasesFutureMinimumSubleaseRentalsDueinRollingYearTwo	3699000	USD
CY2017Q4	ceix	Capital Leases Future Minimum Sublease Rentals Duein Rollingafter Year Five CapitalLeasesFutureMinimumSubleaseRentalsDueinRollingafterYearFive	0	USD
CY2015	ceix	Comprehensive Income Loss Net Of Tax Including Minority Interest ComprehensiveIncomeLossNetOfTaxIncludingMinorityInterest	227979000	USD
CY2016	ceix	Comprehensive Income Loss Net Of Tax Including Minority Interest ComprehensiveIncomeLossNetOfTaxIncludingMinorityInterest	19041000	USD
CY2017	ceix	Comprehensive Income Loss Net Of Tax Including Minority Interest ComprehensiveIncomeLossNetOfTaxIncludingMinorityInterest	177488000	USD
CY2017Q4	ceix	Deferred Tax Assets Liabilitiesbefore Valuation Allowance DeferredTaxAssetsLiabilitiesbeforeValuationAllowance	76444000	USD
CY2016Q4	ceix	Deferred Tax Assets Tax Deferred Expense Compensation Benefits Longterm Disability DeferredTaxAssetsTaxDeferredExpenseCompensationBenefitsLongtermDisability	6358000	USD
CY2017Q4	ceix	Deferred Tax Assets Tax Deferred Expense Compensation Benefits Longterm Disability DeferredTaxAssetsTaxDeferredExpenseCompensationBenefitsLongtermDisability	3375000	USD
CY2017	ceix	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Assumed Time Horizon DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostAssumedTimeHorizon	P20Y
CY2016Q4	ceix	Defined Benefit Plan Investmentin Company Stock DefinedBenefitPlanInvestmentinCompanyStock	0	USD
CY2017Q4	ceix	Defined Benefit Plan Investmentin Company Stock DefinedBenefitPlanInvestmentinCompanyStock	0	USD
CY2015	ceix	Defined Contribution Plan Additional Employer Matching Contribution Percentof Match DefinedContributionPlanAdditionalEmployerMatchingContributionPercentofMatch	0.03
CY2014Q4	ceix	Defined Contribution Plan Age Thresholdfor Additional Matching Contribution Maximum DefinedContributionPlanAgeThresholdforAdditionalMatchingContributionMaximum	40	year
CY2014Q3	ceix	Defined Contribution Plan Yearsof Servicefor Additional Employer Matching Contribution Maximum DefinedContributionPlanYearsofServiceforAdditionalEmployerMatchingContributionMaximum	P10Y
CY2015	ceix	Distributionof Proceeds DistributionofProceeds	0	USD
CY2017	ceix	Effective Income Tax Rate Reconciliation Sharebased Compensation Excess Tax Benefit Amount EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount	384000	USD
CY2016Q4	ceix	Employee Related Liabilities Medical And Disability Benefits Current EmployeeRelatedLiabilitiesMedicalAndDisabilityBenefitsCurrent	10763000	USD
CY2017Q4	ceix	Employee Related Liabilities Medical And Disability Benefits Current EmployeeRelatedLiabilitiesMedicalAndDisabilityBenefitsCurrent	12972000	USD
CY2017	ceix	Employee Service Sharebased Compensation Nonvested Awards Total Compensation Cost Notyet Recognized Periodfor Recognition EmployeeServiceSharebasedCompensationNonvestedAwardsTotalCompensationCostNotyetRecognizedPeriodforRecognition	P2Y10M6D
CY2017Q4	ceix	Guarantor Obligations Maximum Exposure Undiscounted Dueafter Fifth Year GuarantorObligationsMaximumExposureUndiscountedDueafterFifthYear	780000	USD
CY2017Q4	ceix	Guarantor Obligations Maximum Exposure Undiscounted Duein Fourthand Fifth Year GuarantorObligationsMaximumExposureUndiscountedDueinFourthandFifthYear	7894000	USD
CY2017Q4	ceix	Guarantor Obligations Maximum Exposure Undiscounted Duein Next Twelve Months GuarantorObligationsMaximumExposureUndiscountedDueinNextTwelveMonths	646026000	USD
CY2017Q4	ceix	Guarantor Obligations Maximum Exposure Undiscounted Duein Secondand Third Year GuarantorObligationsMaximumExposureUndiscountedDueinSecondandThirdYear	33413000	USD
CY2015	ceix	Increase Decreasefor Intercompany Transactions IncreaseDecreaseforIntercompanyTransactions	0	USD
CY2016	ceix	Increase Decreasefor Intercompany Transactions IncreaseDecreaseforIntercompanyTransactions	0	USD
CY2017	ceix	Increase Decreasefor Intercompany Transactions IncreaseDecreaseforIntercompanyTransactions	0	USD
CY2015	ceix	Increase Decreasein Parent Net Investment IncreaseDecreaseinParentNetInvestment	-461051000	USD
CY2016	ceix	Increase Decreasein Parent Net Investment IncreaseDecreaseinParentNetInvestment	-270969000	USD
CY2017	ceix	Increase Decreasein Parent Net Investment IncreaseDecreaseinParentNetInvestment	-156502000	USD
CY2016Q4	ceix	Liability Other Postretirement Defined Benefit Plan Current LiabilityOtherPostretirementDefinedBenefitPlanCurrent	40611000	USD
CY2017Q4	ceix	Liability Other Postretirement Defined Benefit Plan Current LiabilityOtherPostretirementDefinedBenefitPlanCurrent	37464000	USD
CY2016Q4	ceix	Net Investment From Parent NetInvestmentFromParent	1057694000	USD
CY2017Q4	ceix	Net Investment From Parent NetInvestmentFromParent	0	USD
CY2015	ceix	Net Parent Distributions NetParentDistributions	555671000	USD
CY2016	ceix	Net Parent Distributions NetParentDistributions	260284000	USD
CY2017	ceix	Net Parent Distributions NetParentDistributions	207008000	USD
CY2015Q3	ceix	Net Proceedsfrom Initial Public Offering NetProceedsfromInitialPublicOffering	342711000	USD
CY2015	ceix	Net Proceedsfrom Revolver Mlp NetProceedsfromRevolverMLP	185000000	USD
CY2016	ceix	Net Proceedsfrom Revolver Mlp NetProceedsfromRevolverMLP	16000000	USD
CY2017	ceix	Net Proceedsfrom Revolver Mlp NetProceedsfromRevolverMLP	-201000000	USD
CY2017Q4	ceix	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals Next Rolling Twelve Months OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsNextRollingTwelveMonths	295000	USD
CY2017Q4	ceix	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals Year Five OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsYearFive	0	USD
CY2017Q4	ceix	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals Year Four OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsYearFour	0	USD
CY2017Q4	ceix	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals Year Three OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsYearThree	0	USD
CY2017Q4	ceix	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals Year Two OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsYearTwo	0	USD
CY2017Q4	ceix	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentalsafter Year Five OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentalsafterYearFive	0	USD
CY2015	ceix	Other Comprehensive Income Loss Defined Benefit Plan Adjustmentfor Curtailment Gain Loss Tax OtherComprehensiveIncomeLossDefinedBenefitPlanAdjustmentforCurtailmentGainLossTax	-3788000	USD
CY2016	ceix	Other Comprehensive Income Loss Defined Benefit Plan Adjustmentfor Curtailment Gain Loss Tax OtherComprehensiveIncomeLossDefinedBenefitPlanAdjustmentforCurtailmentGainLossTax	0	USD
CY2017	ceix	Other Comprehensive Income Loss Defined Benefit Plan Adjustmentfor Curtailment Gain Loss Tax OtherComprehensiveIncomeLossDefinedBenefitPlanAdjustmentforCurtailmentGainLossTax	0	USD
CY2015	ceix	Other Comprehensive Income Loss Defined Benefit Plan Adjustmentfor Settlement Gain Loss Tax OtherComprehensiveIncomeLossDefinedBenefitPlanAdjustmentforSettlementGainLossTax	7050000	USD
CY2016	ceix	Other Comprehensive Income Loss Defined Benefit Plan Adjustmentfor Settlement Gain Loss Tax OtherComprehensiveIncomeLossDefinedBenefitPlanAdjustmentforSettlementGainLossTax	8213000	USD
CY2017	ceix	Other Comprehensive Income Loss Defined Benefit Plan Adjustmentfor Settlement Gain Loss Tax OtherComprehensiveIncomeLossDefinedBenefitPlanAdjustmentforSettlementGainLossTax	2312000	USD
CY2015	ceix	Other Comprehensive Income Loss Defined Benefit Plan Curtailment Gain Lossafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanCurtailmentGainLossafterTax	-6451000	USD
CY2016	ceix	Other Comprehensive Income Loss Defined Benefit Plan Curtailment Gain Lossafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanCurtailmentGainLossafterTax	0	USD
CY2017	ceix	Other Comprehensive Income Loss Defined Benefit Plan Curtailment Gain Lossafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanCurtailmentGainLossafterTax	0	USD
CY2015	ceix	Other Comprehensive Income Loss Defined Benefit Plan Plan Amendment Tax OtherComprehensiveIncomeLossDefinedBenefitPlanPlanAmendmentTax	116712000	USD
CY2016	ceix	Other Comprehensive Income Loss Defined Benefit Plan Plan Amendment Tax OtherComprehensiveIncomeLossDefinedBenefitPlanPlanAmendmentTax	10420000	USD
CY2017	ceix	Other Comprehensive Income Loss Defined Benefit Plan Plan Amendment Tax OtherComprehensiveIncomeLossDefinedBenefitPlanPlanAmendmentTax	0	USD
CY2015	ceix	Other Comprehensive Income Loss Defined Benefit Plan Plan Amendmentafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanPlanAmendmentafterTax	198727000	USD
CY2016	ceix	Other Comprehensive Income Loss Defined Benefit Plan Plan Amendmentafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanPlanAmendmentafterTax	28164000	USD
CY2017	ceix	Other Comprehensive Income Loss Defined Benefit Plan Plan Amendmentafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanPlanAmendmentafterTax	0	USD
CY2015	ceix	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gain Lossafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossafterTax	12003000	USD
CY2016	ceix	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gain Lossafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossafterTax	13983000	USD
CY2017	ceix	Other Comprehensive Income Loss Defined Benefit Plan Settlement Gain Lossafter Tax OtherComprehensiveIncomeLossDefinedBenefitPlanSettlementGainLossafterTax	7841000	USD
CY2015	ceix	Other Comprehensive Income Loss Defined Benefit Planafter Taxand Reclassification Adjustment Amount Attributableto Parent Including Noncontrolling Interest OtherComprehensiveIncomeLossDefinedBenefitPlanafterTaxandReclassificationAdjustmentAmountAttributabletoParentIncludingNoncontrollingInterest	89442000	USD
CY2016	ceix	Other Comprehensive Income Loss Defined Benefit Planafter Taxand Reclassification Adjustment Amount Attributableto Parent Including Noncontrolling Interest OtherComprehensiveIncomeLossDefinedBenefitPlanafterTaxandReclassificationAdjustmentAmountAttributabletoParentIncludingNoncontrollingInterest	31409000	USD
CY2017	ceix	Other Comprehensive Income Loss Defined Benefit Planafter Taxand Reclassification Adjustment Amount Attributableto Parent Including Noncontrolling Interest OtherComprehensiveIncomeLossDefinedBenefitPlanafterTaxandReclassificationAdjustmentAmountAttributabletoParentIncludingNoncontrollingInterest	-94919000	USD
CY2015	ceix	Payments On Long Term Notes Including Redemption Premium PaymentsOnLongTermNotesIncludingRedemptionPremium	0	USD
CY2017	ceix	Payments On Long Term Notes Including Redemption Premium PaymentsOnLongTermNotesIncludingRedemptionPremium	0	USD
CY2016Q4	ceix	Pneumoconiosis Benefits PneumoconiosisBenefits	108073000	USD
CY2017Q4	ceix	Pneumoconiosis Benefits PneumoconiosisBenefits	149868000	USD
CY2015	ceix	Revenue From External Customers RevenueFromExternalCustomers	1340502000	USD
CY2016	ceix	Revenue From External Customers RevenueFromExternalCustomers	1143514000	USD
CY2017	ceix	Revenue From External Customers RevenueFromExternalCustomers	1321412000	USD
CY2015	ceix	Right Of Way Issuance RightOfWayIssuance	10827000	USD
CY2016	ceix	Right Of Way Issuance RightOfWayIssuance	11281000	USD
CY2017	ceix	Right Of Way Issuance RightOfWayIssuance	2436000	USD
CY2015	ceix	Salesand Freight Revenue SalesandFreightRevenue	1340502000	USD
CY2016	ceix	Salesand Freight Revenue SalesandFreightRevenue	1143514000	USD
CY2017	ceix	Salesand Freight Revenue SalesandFreightRevenue	1321412000	USD
CY2017	ceix	Separation Number Of Independent Businesses SeparationNumberOfIndependentBusinesses	2	business
CY2017	ceix	Separationand Distribution Costs SeparationandDistributionCosts	40545000	USD
CY2017	ceix	Share Based Compensation Stock Split Conversion Ratio ShareBasedCompensationStockSplitConversionRatio	0.7189
CY2015	ceix	Spin Distribution SpinDistribution	0	USD
CY2016	ceix	Spin Distribution SpinDistribution	0	USD
CY2017	ceix	Spin Distribution SpinDistribution	425000000	USD
CY2015	ceix	Tax Cutsand Jobs Actof2017 Incomplete Accounting Change In Tax Rate Deferred Tax Asset Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpenseBenefit	0	USD
CY2016	ceix	Tax Cutsand Jobs Actof2017 Incomplete Accounting Change In Tax Rate Deferred Tax Asset Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpenseBenefit	0	USD
CY2017	ceix	Tax Cutsand Jobs Actof2017 Incomplete Accounting Change In Tax Rate Deferred Tax Asset Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpenseBenefit	58558000	USD
CY2015	ceix	Terminal Revenue TerminalRevenue	30967000	USD
CY2016	ceix	Terminal Revenue TerminalRevenue	31464000	USD
CY2016	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1469.000	shares
CY2015Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	288977000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	272538000	USD
CY2016	us-gaap	Accretion Expense AccretionExpense	20111000	USD
CY2017	us-gaap	Accretion Expense AccretionExpense	18922000	USD
CY2016Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	12732000	USD
CY2017Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	7510000	USD
CY2016Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	6073000	USD
CY2017Q4	us-gaap	Accrued Bonuses Current AccruedBonusesCurrent	4729000	USD
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	292121000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	290627000	USD
CY2017	ceix	Terminal Revenue TerminalRevenue	60066000	USD
CY2017Q4	ceix	Transactions Between Entities Under Common Control Percentageof Undivided Interest TransactionsBetweenEntitiesUnderCommonControlPercentageofUndividedInterest	0.75
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0001710366
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	28068321	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Non-accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	0	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	CONSOL Energy Inc.
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	82897000	USD
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	109100000	USD
CY2016Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	0	USD
CY2017Q4	us-gaap	Accounts Payable Related Parties Current AccountsPayableRelatedPartiesCurrent	0	USD
CY2016Q4	us-gaap	Accounts Payable Related Parties Current And Noncurrent AccountsPayableRelatedPartiesCurrentAndNoncurrent	1666000	USD
CY2017Q4	us-gaap	Accounts Payable Related Parties Current And Noncurrent AccountsPayableRelatedPartiesCurrentAndNoncurrent	3071000	USD
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	95707000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	131545000	USD
CY2016Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	34000	USD
CY2017Q4	us-gaap	Accounts Receivable Related Parties Current AccountsReceivableRelatedPartiesCurrent	0	USD
CY2016Q4	us-gaap	Accrued Rent Current AccruedRentCurrent	15286000	USD
CY2017Q4	us-gaap	Accrued Rent Current AccruedRentCurrent	9865000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2413125000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	2554056000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-400063000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-305100000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	0	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	552793000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1185000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	22085000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9205000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	10986000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	16212000	USD
CY2015	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2017Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	258823000	USD
CY2016	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	11637000	USD
CY2017	us-gaap	Asset Retirement Obligation Cash Paid To Settle AssetRetirementObligationCashPaidToSettle	10467000	USD
CY2016Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	26259000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	30480000	USD
CY2016	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-25427000	USD
CY2017	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-20529000	USD
CY2016Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	246279000	USD
CY2017Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	228343000	USD
CY2015Q4	us-gaap	Assets Assets	2867733000	USD
CY2016Q4	us-gaap	Assets Assets	2687434000	USD
CY2017Q4	us-gaap	Assets Assets	2707099000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	200134000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	399240000	USD
CY2016Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	3547000	USD
CY2017Q4	us-gaap	Capital Lease Obligations CapitalLeaseObligations	3559000	USD
CY2016Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	3703000	USD
CY2017Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	3164000	USD
CY2016Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	11812000	USD
CY2017Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	8639000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	13138000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	3773000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	0	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	2253000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	3471000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	3641000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	1335000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	11803000	USD
CY2017Q4	us-gaap	Capital Leases Future Minimum Sublease Rentals CapitalLeasesFutureMinimumSubleaseRentals	13254000	USD
CY2016	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	491000	USD
CY2017	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	424000	USD
CY2016Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	2399000	USD
CY2017Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	2839000	USD
CY2015	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	20499000	USD
CY2016Q1	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	13110000	USD
CY2016Q2	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	11447000	USD
CY2016Q3	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	9392000	USD
CY2016Q4	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	12519000	USD
CY2016	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	46468000	USD
CY2017Q1	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	12282000	USD
CY2017Q2	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	17762000	USD
CY2017Q3	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	21803000	USD
CY2017Q4	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	21845000	USD
CY2017	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	73692000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	137000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6639000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	13311000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	153979000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	6502000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	6672000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	140668000	USD
CY2015	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	1289036000	USD
CY2016Q1	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	226164000	USD
CY2016Q2	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	250562000	USD
CY2016Q3	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	267685000	USD
CY2016Q4	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	321171000	USD
CY2016	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	1065582000	USD
CY2017Q1	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	316448000	USD
CY2017Q2	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	303707000	USD
CY2017Q3	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	279245000	USD
CY2017Q4	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	288254000	USD
CY2017	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	1187654000	USD
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	62500000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	27973281	shares
CY2014Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	0	shares
CY2015Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	0	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	0	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	27973000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	27973281	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	280000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	217569000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9825000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	162592000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	10410000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	9216000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	14896000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	227979000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	19041000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	177488000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	978694000	USD
CY2016Q1	us-gaap	Costs And Expenses CostsAndExpenses	253661000	USD
CY2016Q2	us-gaap	Costs And Expenses CostsAndExpenses	280835000	USD
CY2016Q3	us-gaap	Costs And Expenses CostsAndExpenses	290704000	USD
CY2016Q4	us-gaap	Costs And Expenses CostsAndExpenses	340647000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	1165847000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	202822000	USD
CY2016Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	10520000	USD
CY2017Q4	us-gaap	Deferred Revenue Current DeferredRevenueCurrent	6807000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	6429000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	2257000	USD
CY2017Q1	us-gaap	Costs And Expenses CostsAndExpenses	316370000	USD
CY2017Q2	us-gaap	Costs And Expenses CostsAndExpenses	290194000	USD
CY2017Q3	us-gaap	Costs And Expenses CostsAndExpenses	323025000	USD
CY2017Q4	us-gaap	Costs And Expenses CostsAndExpenses	312517000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	1242106000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	49435000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-76447000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	65856000	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	963000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1411000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	2030000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	52989000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-76960000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	70618000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2591000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1924000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	2732000	USD
CY2017Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	904950000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	66187000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	89268000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	17397000	USD
CY2016Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	184579000	USD
CY2017Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	75065000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	72616000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	91525000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	16610000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	336620000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-787000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	521199000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	279266000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	184579000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	75065000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	521199000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	277887000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	8042000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	7924000	USD
CY2016Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	3175000	USD
CY2017Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	4473000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	43371000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	36160000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	28530000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Other DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther	16778000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	37498000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	12465000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	255507000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Postretirement Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits	131354000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	39251000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	15322000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	99467000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	51415000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1379000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	67498000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	17991000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	12175000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	10025000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	256947000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	174806000	USD
CY2016Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	99872000	USD
CY2017Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	52960000	USD
CY2016Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	632434000	USD
CY2017Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	679245000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	13729000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	17687000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	9888000	USD
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	9499000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	0	USD
CY2016	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	0.06
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	195337000	USD
CY2016Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	48662000	USD
CY2016Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	29314000	USD
CY2016Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	49850000	USD
CY2016Q4	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	50296000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	178122000	USD
CY2017Q1	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	52993000	USD
CY2017Q2	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	25268000	USD
CY2017Q3	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	46653000	USD
CY2017Q4	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	47088000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	172002000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	10.98
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-0.063
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.66
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.48
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.47
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.71
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.04
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.42
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	10.98
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.00
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.00
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.00
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.48
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.00
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.00
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.00
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.04
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.40
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.283
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.224
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.513
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance	0.008
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.345
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.011
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	-0.025
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Deductions Qualified Production Activities EffectiveIncomeTaxRateReconciliationDeductionsQualifiedProductionActivities	0.038
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-0.336
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Depletion EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDepletion	-0.143
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.008
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.045
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.016
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.015
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.015
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.007
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	0.215
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	0.000
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	9904000	USD
CY2015	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	609000	USD
CY2016	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	607000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	1439000	USD
CY2016Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	7800000	USD
CY2017Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	11411000	USD
CY2015	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	0	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-2156000	USD
CY2015	us-gaap	Freight Costs FreightCosts	20499000	USD
CY2016Q1	us-gaap	Freight Costs FreightCosts	13110000	USD
CY2016Q2	us-gaap	Freight Costs FreightCosts	11447000	USD
CY2016Q3	us-gaap	Freight Costs FreightCosts	9392000	USD
CY2016Q4	us-gaap	Freight Costs FreightCosts	12519000	USD
CY2016	us-gaap	Freight Costs FreightCosts	46468000	USD
CY2017Q1	us-gaap	Freight Costs FreightCosts	12282000	USD
CY2017Q2	us-gaap	Freight Costs FreightCosts	17762000	USD
CY2017Q3	us-gaap	Freight Costs FreightCosts	21803000	USD
CY2017Q4	us-gaap	Freight Costs FreightCosts	21845000	USD
CY2017	us-gaap	Freight Costs FreightCosts	73692000	USD
CY2015	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	0	USD
CY2016	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	6288000	USD
CY2017	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	9912000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	13025000	USD
CY2016Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-28000	USD
CY2016Q2	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	3933000	USD
CY2016Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	194000	USD
CY2016Q4	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	1129000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	5228000	USD
CY2017Q1	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	7955000	USD
CY2017Q2	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	5582000	USD
CY2017Q3	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	-513000	USD
CY2017Q4	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	4188000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets1 GainLossOnDispositionOfAssets1	17212000	USD
CY2015	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	13025000	USD
CY2016	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	5228000	USD
CY2017	us-gaap	Gain Loss On Sale Of Other Assets GainLossOnSaleOfOtherAssets	17212000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2016Q4	us-gaap	Gas Purchase Payable Current GasPurchasePayableCurrent	0	USD
CY2017Q4	us-gaap	Gas Purchase Payable Current GasPurchasePayableCurrent	22631000	USD
CY2017Q4	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	688113000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	443026000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	8800000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	13792000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	4685000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	37738000	USD
CY2016	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2015	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	-63764000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	65015000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	55851000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	61857000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	12288000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	39801000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	169797000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	10.98
CY2016	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	1.48
CY2017	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	2.42
CY2015	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	10.98
CY2016	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	1.48
CY2017	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.40
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	125605000	USD
CY2016Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-84000	USD
CY2016Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-109000	USD
CY2016Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-66000	USD
CY2016Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14824000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14565000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9406000	USD
CY2017Q2	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9611000	USD
CY2017Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3770000	USD
CY2017Q4	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	64441000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	87228000	USD
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	1379000	USD
CY2015	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	4933000	USD
CY2016	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	-1621000	USD
CY2017	us-gaap	Income Tax Reconciliation Deductions Qualified Production Activities IncomeTaxReconciliationDeductionsQualifiedProductionActivities	6493000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	155059000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22755000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	59429000	USD
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-27720000	USD
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-21856000	USD
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-24216000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-3568000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2910000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2693000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	6767000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	997000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1264000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	13958000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2015	us-gaap	Income Taxes Paid IncomeTaxesPaid	0	USD
CY2016	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	17608000	USD
CY2017	us-gaap	Increase Decrease In Accounts And Notes Receivable IncreaseDecreaseInAccountsAndNotesReceivable	44417000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-575000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-4152000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	7043000	USD
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-4951000	USD
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-3352000	USD
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3259000	USD
CY2015	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-266700000	USD
CY2016	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-10609000	USD
CY2017	us-gaap	Increase Decrease In Other Accrued Liabilities IncreaseDecreaseInOtherAccruedLiabilities	-40765000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	60346000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	10652000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-6050000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-28302000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-8596000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-3860000	USD
CY2015	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-57973000	USD
CY2016	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	24913000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	46421000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	485000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-7503000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	2877000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	206	shares
CY2015	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	2488000	USD
CY2016	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	1372000	USD
CY2017	us-gaap	Interest Costs Incurred Capitalized InterestCostsIncurredCapitalized	1444000	USD
CY2015	us-gaap	Interest Expense InterestExpense	7544000	USD
CY2016Q1	us-gaap	Interest Expense InterestExpense	3140000	USD
CY2016Q2	us-gaap	Interest Expense InterestExpense	3357000	USD
CY2016Q3	us-gaap	Interest Expense InterestExpense	3481000	USD
CY2016Q4	us-gaap	Interest Expense InterestExpense	4075000	USD
CY2016	us-gaap	Interest Expense InterestExpense	14053000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	4022000	USD
CY2017Q2	us-gaap	Interest Expense InterestExpense	3944000	USD
CY2017Q3	us-gaap	Interest Expense InterestExpense	3862000	USD
CY2017Q4	us-gaap	Interest Expense InterestExpense	14270000	USD
CY2017	us-gaap	Interest Expense InterestExpense	26098000	USD
CY2015	us-gaap	Interest Income Other InterestIncomeOther	410000	USD
CY2016	us-gaap	Interest Income Other InterestIncomeOther	1166000	USD
CY2017	us-gaap	Interest Income Other InterestIncomeOther	2619000	USD
CY2015	us-gaap	Interest Paid Net InterestPaidNet	7544000	USD
CY2016	us-gaap	Interest Paid Net InterestPaidNet	14053000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	18151000	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	2239000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	10039000	USD
CY2016Q4	us-gaap	Inventory Net InventoryNet	50161000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	53420000	USD
CY2016Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	42361000	USD
CY2017Q4	us-gaap	Inventory Supplies Net Of Reserves InventorySuppliesNetOfReserves	42009000	USD
CY2016Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	83423000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	87903000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	77879000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	1887310000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	2363458000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2687434000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2707099000	USD
CY2017Q4	us-gaap	Liabilities Assumed1 LiabilitiesAssumed1	17613000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	379094000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	422209000	USD
CY2016Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	1194577000	USD
CY2017Q4	us-gaap	Liabilities Other Than Longterm Debt Noncurrent LiabilitiesOtherThanLongtermDebtNoncurrent	1075960000	USD
CY2016Q4	us-gaap	Litigation Reserve Current LitigationReserveCurrent	12532000	USD
CY2017Q4	us-gaap	Litigation Reserve Current LitigationReserveCurrent	8197000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	302200000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	875968000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	313639000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	865289000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	4076000	USD
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	22482000	USD
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	313639000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	373000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	19318000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	403665000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	19318000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	384169000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	49242000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	29265000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	19291000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	301827000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	856650000	USD
CY2016Q4	us-gaap	Minority Interest MinorityInterest	142493000	USD
CY2017Q4	us-gaap	Minority Interest MinorityInterest	139381000	USD
CY2015	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	5060000	USD
CY2016	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	21657000	USD
CY2017	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	21892000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-154917000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-276677000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-50611000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-130274000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-45758000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-56831000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	291693000	USD
CY2015	us-gaap	Operating Expenses OperatingExpenses	699594000	USD
CY2016Q1	us-gaap	Operating Expenses OperatingExpenses	181189000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	329107000	USD
CY2017Q4	us-gaap	Noncash Or Part Noncash Acquisition Value Of Assets Acquired1 NoncashOrPartNoncashAcquisitionValueOfAssetsAcquired1	32893000	USD
CY2015	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	148399000	USD
CY2017	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	248110000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	307011000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	7770000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	12722000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	2503000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	18501000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	41496000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	40981000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	47933000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	7728000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-29013000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	67629000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	10410000	USD
CY2016Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1114000	USD
CY2016Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1179000	USD
CY2016Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	2248000	USD
CY2016Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4413000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	8954000	USD
CY2017Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5464000	USD
CY2017Q2	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4313000	USD
CY2017Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	790000	USD
CY2017Q4	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4373000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14940000	USD
CY2016Q2	us-gaap	Operating Expenses OperatingExpenses	226257000	USD
CY2016Q3	us-gaap	Operating Expenses OperatingExpenses	215824000	USD
CY2016Q4	us-gaap	Operating Expenses OperatingExpenses	253907000	USD
CY2016	us-gaap	Operating Expenses OperatingExpenses	877177000	USD
CY2017Q1	us-gaap	Operating Expenses OperatingExpenses	229994000	USD
CY2017Q2	us-gaap	Operating Expenses OperatingExpenses	222882000	USD
CY2017Q3	us-gaap	Operating Expenses OperatingExpenses	229527000	USD
CY2017Q4	us-gaap	Operating Expenses OperatingExpenses	204306000	USD
CY2017	us-gaap	Operating Expenses OperatingExpenses	886709000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	181818000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	73223000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Future Minimum Sublease Rentals OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals	295000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	11680000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	21473000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	22260000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	31386000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	21796000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	19747000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	23900000	USD
CY2016Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	122451000	USD
CY2017Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	110497000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	307030000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	185562000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	13524000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	316000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plan Net Prior Service Costs Credit Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlanNetPriorServiceCostsCreditArisingDuringPeriodNetOfTax	1832000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-89442000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	-31409000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	94919000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	74463000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	14515000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	15391000	USD
CY2015	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	43732000	USD
CY2016	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	8524000	USD
CY2017	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	9039000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-89442000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-31409000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	94919000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-42794000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	31427000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	-73519000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-25916000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	24232000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Before Reclassification Adjustments Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBeforeReclassificationAdjustmentsTax	-26360000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	7943000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	186000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Benefit Plan Improvement Tax Effect OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansBenefitPlanImprovementTaxEffect	1076000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-51745000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-18101000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	30323000	USD
CY2015	us-gaap	Other Income OtherIncome	68193000	USD
CY2016Q1	us-gaap	Other Income OtherIncome	15506000	USD
CY2016Q2	us-gaap	Other Income OtherIncome	20627000	USD
CY2016Q3	us-gaap	Other Income OtherIncome	13569000	USD
CY2016Q4	us-gaap	Other Income OtherIncome	32418000	USD
CY2016	us-gaap	Other Income OtherIncome	82120000	USD
CY2017Q1	us-gaap	Other Income OtherIncome	22650000	USD
CY2017Q2	us-gaap	Other Income OtherIncome	10145000	USD
CY2017Q3	us-gaap	Other Income OtherIncome	19713000	USD
CY2017Q4	us-gaap	Other Income OtherIncome	20771000	USD
CY2017	us-gaap	Other Income OtherIncome	73279000	USD
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	14947000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	24042000	USD
CY2015	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3096000	USD
CY2016	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3100000	USD
CY2017	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	2948000	USD
CY2016Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	659474000	USD
CY2017Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	554099000	USD
CY2016Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	23320000	USD
CY2017Q4	us-gaap	Other Receivables Net Current OtherReceivablesNetCurrent	36552000	USD
CY2016Q1	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	7709000	USD
CY2016Q2	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	8058000	USD
CY2016Q3	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	4549000	USD
CY2016Q4	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	11148000	USD
CY2017Q1	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	12886000	USD
CY2017Q2	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	14855000	USD
CY2017Q3	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	15065000	USD
CY2017Q4	us-gaap	Other Sales Revenue Net OtherSalesRevenueNet	17260000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	16336000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	482000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	32304000	USD
CY2015	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	143053000	USD
CY2016	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	53600000	USD
CY2017	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	81413000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	143053000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	53600000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	81413000	USD
CY2015	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	5060000	USD
CY2016	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	21657000	USD
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	21892000	USD
CY2016Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	17601000	USD
CY2017Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	23744000	USD
CY2017	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2015	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	148359000	USD
CY2016	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2017	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2016	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-21657000	USD
CY2017	us-gaap	Proceeds From Payments To Minority Shareholders ProceedsFromPaymentsToMinorityShareholders	-21892000	USD
CY2015	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-5829000	USD
CY2016	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	431000	USD
CY2017	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-3904000	USD
CY2015	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	12779000	USD
CY2016	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	7842000	USD
CY2017	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	24582000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	317421000	USD
CY2016Q1	us-gaap	Profit Loss ProfitLoss	8884000	USD
CY2016Q2	us-gaap	Profit Loss ProfitLoss	13901000	USD
CY2016Q3	us-gaap	Revenues Revenues	295389000	USD
CY2016Q4	us-gaap	Revenues Revenues	378385000	USD
CY2016	us-gaap	Revenues Revenues	1230862000	USD
CY2017Q1	us-gaap	Revenues Revenues	372221000	USD
CY2017Q2	us-gaap	Revenues Revenues	352051000	USD
CY2017Q3	us-gaap	Revenues Revenues	335313000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	4751000	USD
CY2016Q4	us-gaap	Profit Loss ProfitLoss	22914000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	50450000	USD
CY2017Q1	us-gaap	Profit Loss ProfitLoss	46445000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	52246000	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	8518000	USD
CY2017Q4	us-gaap	Profit Loss ProfitLoss	-24640000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	82569000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4593395000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	4676353000	USD
CY2015Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2325181000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2180270000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	2122297000	USD
CY2015	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	36908000	USD
CY2016	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	34789000	USD
CY2017	us-gaap	Rental Income Nonoperating RentalIncomeNonoperating	14114000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	0	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	0	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-43713000	USD
CY2015	us-gaap	Revenue Coal Services RevenueCoalServices	1596000	USD
CY2016	us-gaap	Revenue Coal Services RevenueCoalServices	5757000	USD
CY2017	us-gaap	Revenue Coal Services RevenueCoalServices	13161000	USD
CY2015	us-gaap	Revenues Revenues	1421720000	USD
CY2016Q1	us-gaap	Revenues Revenues	262461000	USD
CY2016Q2	us-gaap	Revenues Revenues	294627000	USD
CY2017Q4	us-gaap	Revenues Revenues	352318000	USD
CY2017	us-gaap	Revenues Revenues	1411903000	USD
CY2015	us-gaap	Royalty Revenue From Coal RoyaltyRevenueFromCoal	15356000	USD
CY2016	us-gaap	Royalty Revenue From Coal RoyaltyRevenueFromCoal	19739000	USD
CY2017	us-gaap	Royalty Revenue From Coal RoyaltyRevenueFromCoal	28089000	USD
CY2015	us-gaap	Sales Revenue Net SalesRevenueNet	1421720000	USD
CY2016	us-gaap	Sales Revenue Net SalesRevenueNet	1230862000	USD
CY2017	us-gaap	Sales Revenue Net SalesRevenueNet	1411903000	USD
CY2015	us-gaap	Sales Revenue Services Gross SalesRevenueServicesGross	30967000	USD
CY2016	us-gaap	Sales Revenue Services Gross SalesRevenueServicesGross	31464000	USD
CY2017	us-gaap	Sales Revenue Services Gross SalesRevenueServicesGross	60066000	USD
CY2015	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	55720000	USD
CY2016Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	7560000	USD
CY2017	us-gaap	Stockholders Equity Note Spinoff Transaction StockholdersEquityNoteSpinoffTransaction	-425000000	USD
CY2016Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	10460000	USD
CY2016Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	12157000	USD
CY2016Q4	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	19850000	USD
CY2016	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	50027000	USD
CY2017Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	17079000	USD
CY2017Q2	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	20338000	USD
CY2017Q3	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	21180000	USD
CY2017Q4	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	25008000	USD
CY2017	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	83605000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	8406000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	12895000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	22085000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Accelerated Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardAcceleratedCompensationCost	1436000	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	2600000	shares
CY2017Q4	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	27968000	shares
CY2015	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2016	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2017	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	27968000	shares
CY2015	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	0	shares
CY2016	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	0	shares
CY2017	us-gaap	Stock Issued During Period Shares Share Based Compensation StockIssuedDuringPeriodSharesShareBasedCompensation	5000	shares
CY2017Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	50000000	USD
CY2017	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	0	shares
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	657631000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	204260000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	5006289000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1061839000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	800124000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	343641000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2156000	USD
CY2016Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	4343000	USD
CY2017Q4	us-gaap	Unamortized Debt Issuance Expense UnamortizedDebtIssuanceExpense	21129000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27968	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	27968	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	28174	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27968	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27968	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	27968	shares
CY2016Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	13596000	USD
CY2017Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	13317000	USD
CY2016Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	65932000	USD
CY2017Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	66648000	USD
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:18px;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates </font></div><div style="line-height:120%;padding-top:18px;text-align:justify;text-indent:30px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses, as well as various disclosures. Actual results could differ from those estimates. The most significant estimates included in the preparation of the consolidated financial statements are related to other postretirement benefits, coal workers' pneumoconiosis, workers' compensation, salary retirement benefits, stock-based compensation, asset retirement obligations, deferred income tax assets and liabilities, contingencies and the values of coal properties.</font></div></div>

Files In Submission

Name	View Source	Status
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$CNR
Core Natural Resources, Inc. Stock $cnr

2017 Q4 Form 10-K Financial Statement

#000171036618000006 Filed on February 16, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CNR Core Natural Resources, Inc. Stock $cnr

2017 Q4 Form 10-K Financial Statement

#000171036618000006 Filed on February 16, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CNR
Core Natural Resources, Inc. Stock $cnr