10-Q Filing

CORE NATURAL RESOURCES, INC. CIK: 1710366 Q1 2025

Filing Information

Form Type	10-Q
Accession Number	`0001710366-25-000014`
Period End Date	20250331
Filing Date	20250508
Fiscal Year	2025
Fiscal Period	Q1
XBRL Instance	ceix-20250331_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 160 Income Statement 72 Cash Flow Statement 160 Stockholders Equity 72 Comprehensive Income 28

Balance Sheet 160 line items

Line Item	Tag	Value	Unit	Period
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	125.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	125.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	62.50M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	62.50M	shares	Point-in-time
Cash and Cash Equivalents	`CashAndCashEquivalentsAtCarryingValue`	$388.49M	USD	Point-in-time
Cash and Cash Equivalents	`CashAndCashEquivalentsAtCarryingValue`	$388.49M	USD	Point-in-time
Cash and Cash Equivalents	`CashAndCashEquivalentsAtCarryingValue`	$172.55M	USD	Point-in-time
Cash and Cash Equivalents	`CashAndCashEquivalentsAtCarryingValue`	$172.55M	USD	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	29.41M	shares	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	29.41M	shares	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	52.64M	shares	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	52.64M	shares	Point-in-time
Cash and Cash Equivalents	`CashAndCashEquivalentsAtCarryingValue`	$408.24M	USD	Point-in-time
Cash and Cash Equivalents	`CashAndCashEquivalentsAtCarryingValue`	$408.24M	USD	Point-in-time
Short-Term Investments	`DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent`	$51.99M	USD	Point-in-time
Short-Term Investments	`DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent`	$51.99M	USD	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	29.41M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	29.41M	shares	Point-in-time
Short-Term Investments	`DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent`	-	USD	Point-in-time
Short-Term Investments	`DebtSecuritiesAvailableForSaleExcludingAccruedInterestCurrent`	-	USD	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	52.64M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	52.64M	shares	Point-in-time
Trade Receivables, net	`AccountsReceivableNetCurrent`	$136.75M	USD	Point-in-time
Trade Receivables, net	`AccountsReceivableNetCurrent`	$136.75M	USD	Point-in-time
Trade Receivables, net	`AccountsReceivableNetCurrent`	$400.83M	USD	Point-in-time
Trade Receivables, net	`AccountsReceivableNetCurrent`	$400.83M	USD	Point-in-time
Other Receivables, net	`OtherReceivablesNetCurrent`	$26.94M	USD	Point-in-time
Other Receivables, net	`OtherReceivablesNetCurrent`	$26.94M	USD	Point-in-time
Other Receivables, net	`OtherReceivablesNetCurrent`	$25.90M	USD	Point-in-time
Other Receivables, net	`OtherReceivablesNetCurrent`	$25.90M	USD	Point-in-time
Inventories	`InventoryNet`	$388.00M	USD	Point-in-time
Inventories	`InventoryNet`	$388.00M	USD	Point-in-time
Inventories	`InventoryNet`	$96.20M	USD	Point-in-time
Inventories	`InventoryNet`	$96.20M	USD	Point-in-time
Other Current Assets	`OtherAssetsCurrent`	$66.87M	USD	Point-in-time
Other Current Assets	`OtherAssetsCurrent`	$66.87M	USD	Point-in-time
Other Current Assets	`OtherAssetsCurrent`	$128.41M	USD	Point-in-time
Other Current Assets	`OtherAssetsCurrent`	$128.41M	USD	Point-in-time
Total Current Assets	`AssetsCurrent`	$1.33B	USD	Point-in-time
Total Current Assets	`AssetsCurrent`	$1.33B	USD	Point-in-time
Total Current Assets	`AssetsCurrent`	$785.96M	USD	Point-in-time
Total Current Assets	`AssetsCurrent`	$785.96M	USD	Point-in-time
Total Property, Plant and EquipmentNet	`PropertyPlantAndEquipmentNet`	$4.52B	USD	Point-in-time
Total Property, Plant and EquipmentNet	`PropertyPlantAndEquipmentNet`	$4.52B	USD	Point-in-time
Total Property, Plant and EquipmentNet	`PropertyPlantAndEquipmentNet`	$1.92B	USD	Point-in-time
Total Property, Plant and EquipmentNet	`PropertyPlantAndEquipmentNet`	$1.92B	USD	Point-in-time
Funds for Asset Retirement Obligations	`FundsForAssetRetirementObligations`	$12.05M	USD	Point-in-time
Funds for Asset Retirement Obligations	`FundsForAssetRetirementObligations`	$12.05M	USD	Point-in-time
Funds for Asset Retirement Obligations	`FundsForAssetRetirementObligations`	$163.33M	USD	Point-in-time
Funds for Asset Retirement Obligations	`FundsForAssetRetirementObligations`	$163.33M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$41.94M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$41.94M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$43.18M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$43.18M	USD	Point-in-time
Other Noncurrent Assets, net	`OtherAssetsMiscellaneousNoncurrent`	$193.31M	USD	Point-in-time
Other Noncurrent Assets, net	`OtherAssetsMiscellaneousNoncurrent`	$193.31M	USD	Point-in-time
Other Noncurrent Assets, net	`OtherAssetsMiscellaneousNoncurrent`	$117.89M	USD	Point-in-time
Other Noncurrent Assets, net	`OtherAssetsMiscellaneousNoncurrent`	$117.89M	USD	Point-in-time
Total Other Assets	`OtherAssetsNoncurrent`	$399.82M	USD	Point-in-time
Total Other Assets	`OtherAssetsNoncurrent`	$399.82M	USD	Point-in-time
Total Other Assets	`OtherAssetsNoncurrent`	$171.89M	USD	Point-in-time
Total Other Assets	`OtherAssetsNoncurrent`	$171.89M	USD	Point-in-time
TOTAL ASSETS	`Assets`	$2.68B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$2.68B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$6.25B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$6.25B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$2.88B	USD	Point-in-time
TOTAL ASSETS	`Assets`	$2.88B	USD	Point-in-time
Accounts Payable	`AccountsPayableCurrent`	$143.63M	USD	Point-in-time
Accounts Payable	`AccountsPayableCurrent`	$143.63M	USD	Point-in-time
Accounts Payable	`AccountsPayableCurrent`	$298.75M	USD	Point-in-time
Accounts Payable	`AccountsPayableCurrent`	$298.75M	USD	Point-in-time
Current Portion of Long-Term Debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$37.36M	USD	Point-in-time
Current Portion of Long-Term Debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$37.36M	USD	Point-in-time
Current Portion of Long-Term Debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$112.86M	USD	Point-in-time
Current Portion of Long-Term Debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$112.86M	USD	Point-in-time
Other Accrued Liabilities	`AccruedLiabilitiesCurrent`	$262.18M	USD	Point-in-time
Other Accrued Liabilities	`AccruedLiabilitiesCurrent`	$262.18M	USD	Point-in-time
Other Accrued Liabilities	`AccruedLiabilitiesCurrent`	$367.76M	USD	Point-in-time
Other Accrued Liabilities	`AccruedLiabilitiesCurrent`	$367.76M	USD	Point-in-time
Total Current Liabilities	`LiabilitiesCurrent`	$518.68M	USD	Point-in-time
Total Current Liabilities	`LiabilitiesCurrent`	$518.68M	USD	Point-in-time
Total Current Liabilities	`LiabilitiesCurrent`	$703.86M	USD	Point-in-time
Total Current Liabilities	`LiabilitiesCurrent`	$703.86M	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$313.27M	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$313.27M	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$79.52M	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$79.52M	USD	Point-in-time
Finance Lease Obligations	`FinanceLeaseLiabilityNoncurrent`	$15.27M	USD	Point-in-time
Finance Lease Obligations	`FinanceLeaseLiabilityNoncurrent`	$15.27M	USD	Point-in-time
Finance Lease Obligations	`FinanceLeaseLiabilityNoncurrent`	$16.50M	USD	Point-in-time
Finance Lease Obligations	`FinanceLeaseLiabilityNoncurrent`	$16.50M	USD	Point-in-time
Total Long-Term Debt	`LongTermDebtAndCapitalLeaseObligations`	$94.79M	USD	Point-in-time
Total Long-Term Debt	`LongTermDebtAndCapitalLeaseObligations`	$94.79M	USD	Point-in-time
Total Long-Term Debt	`LongTermDebtAndCapitalLeaseObligations`	$329.77M	USD	Point-in-time
Total Long-Term Debt	`LongTermDebtAndCapitalLeaseObligations`	$329.77M	USD	Point-in-time
Postretirement Benefits Other Than Pensions	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$213.09M	USD	Point-in-time
Postretirement Benefits Other Than Pensions	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$213.09M	USD	Point-in-time
Postretirement Benefits Other Than Pensions	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$176.25M	USD	Point-in-time
Postretirement Benefits Other Than Pensions	`OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent`	$176.25M	USD	Point-in-time
Pneumoconiosis Benefits	`EmployeeRelatedLiabilitiesMedicalAndDisabilityBenefitsNoncurrent`	$145.49M	USD	Point-in-time
Pneumoconiosis Benefits	`EmployeeRelatedLiabilitiesMedicalAndDisabilityBenefitsNoncurrent`	$145.49M	USD	Point-in-time
Pneumoconiosis Benefits	`EmployeeRelatedLiabilitiesMedicalAndDisabilityBenefitsNoncurrent`	$256.25M	USD	Point-in-time
Pneumoconiosis Benefits	`EmployeeRelatedLiabilitiesMedicalAndDisabilityBenefitsNoncurrent`	$256.25M	USD	Point-in-time
Asset Retirement Obligations	`AssetRetirementObligationsNoncurrent`	$463.41M	USD	Point-in-time
Asset Retirement Obligations	`AssetRetirementObligationsNoncurrent`	$463.41M	USD	Point-in-time
Asset Retirement Obligations	`AssetRetirementObligationsNoncurrent`	$212.18M	USD	Point-in-time
Asset Retirement Obligations	`AssetRetirementObligationsNoncurrent`	$212.18M	USD	Point-in-time
Workers Compensation	`WorkersCompensationLiabilityNoncurrent`	$72.77M	USD	Point-in-time
Workers Compensation	`WorkersCompensationLiabilityNoncurrent`	$72.77M	USD	Point-in-time
Workers Compensation	`WorkersCompensationLiabilityNoncurrent`	$36.05M	USD	Point-in-time
Workers Compensation	`WorkersCompensationLiabilityNoncurrent`	$36.05M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$20.07M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$20.07M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$20.80M	USD	Point-in-time
Salary Retirement	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$20.80M	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$49.21M	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$49.21M	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$211.19M	USD	Point-in-time
Deferred Income Taxes	`DeferredIncomeTaxLiabilitiesNet`	$211.19M	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$58.56M	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$58.56M	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$85.03M	USD	Point-in-time
Other Noncurrent Liabilities	`OtherLiabilitiesNoncurrent`	$85.03M	USD	Point-in-time
Total Deferred Credits and Other Liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$1.32B	USD	Point-in-time
Total Deferred Credits and Other Liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$1.32B	USD	Point-in-time
Total Deferred Credits and Other Liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$697.82M	USD	Point-in-time
Total Deferred Credits and Other Liabilities	`LiabilitiesOtherThanLongtermDebtNoncurrent`	$697.82M	USD	Point-in-time
TOTAL LIABILITIES	`Liabilities`	$2.36B	USD	Point-in-time
TOTAL LIABILITIES	`Liabilities`	$2.36B	USD	Point-in-time
TOTAL LIABILITIES	`Liabilities`	$1.31B	USD	Point-in-time
TOTAL LIABILITIES	`Liabilities`	$1.31B	USD	Point-in-time
Common Stock, $0.01 Par Value; 125,000,000 Shares Authorized, 52,639,428 Shares Issued and Outstanding at March 31, 2025; 62,500,000 Shares Authorized, 29,407,830 Shares Issued and Outstanding at December 31, 2024	`CommonStockValue`	$294.00K	USD	Point-in-time
Common Stock, $0.01 Par Value; 125,000,000 Shares Authorized, 52,639,428 Shares Issued and Outstanding at March 31, 2025; 62,500,000 Shares Authorized, 29,407,830 Shares Issued and Outstanding at December 31, 2024	`CommonStockValue`	$294.00K	USD	Point-in-time
Common Stock, $0.01 Par Value; 125,000,000 Shares Authorized, 52,639,428 Shares Issued and Outstanding at March 31, 2025; 62,500,000 Shares Authorized, 29,407,830 Shares Issued and Outstanding at December 31, 2024	`CommonStockValue`	$526.00K	USD	Point-in-time
Common Stock, $0.01 Par Value; 125,000,000 Shares Authorized, 52,639,428 Shares Issued and Outstanding at March 31, 2025; 62,500,000 Shares Authorized, 29,407,830 Shares Issued and Outstanding at December 31, 2024	`CommonStockValue`	$526.00K	USD	Point-in-time
Capital in Excess of Par Value	`AdditionalPaidInCapital`	$3.02B	USD	Point-in-time
Capital in Excess of Par Value	`AdditionalPaidInCapital`	$3.02B	USD	Point-in-time
Capital in Excess of Par Value	`AdditionalPaidInCapital`	$540.41M	USD	Point-in-time
Capital in Excess of Par Value	`AdditionalPaidInCapital`	$540.41M	USD	Point-in-time
Retained Earnings	`RetainedEarningsAccumulatedDeficit`	$1.01B	USD	Point-in-time
Retained Earnings	`RetainedEarningsAccumulatedDeficit`	$1.01B	USD	Point-in-time
Retained Earnings	`RetainedEarningsAccumulatedDeficit`	$1.16B	USD	Point-in-time
Retained Earnings	`RetainedEarningsAccumulatedDeficit`	$1.16B	USD	Point-in-time
Accumulated Other Comprehensive Loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-134.57M	USD	Point-in-time
Accumulated Other Comprehensive Loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-134.57M	USD	Point-in-time
Accumulated Other Comprehensive Loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-134.50M	USD	Point-in-time
Accumulated Other Comprehensive Loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-134.50M	USD	Point-in-time
TOTAL EQUITY	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$3.90B	USD	Point-in-time
TOTAL EQUITY	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$3.90B	USD	Point-in-time
TOTAL EQUITY	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.57B	USD	Point-in-time
TOTAL EQUITY	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$1.57B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$2.88B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$2.88B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$6.25B	USD	Point-in-time
TOTAL LIABILITIES AND EQUITY	`LiabilitiesAndStockholdersEquity`	$6.25B	USD	Point-in-time

Income Statement 72 line items

Line Item	Tag	Value	Unit	Period
Revenues	`Revenues`	$546.69M	USD	1 Quarter
Revenues	`Revenues`	$546.69M	USD	1 Quarter
Revenues	`Revenues`	$1.02B	USD	1 Quarter
Revenues	`Revenues`	$1.02B	USD	1 Quarter
Cost of Sales (exclusive of items shown separately below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$870.30M	USD	1 Quarter
Cost of Sales (exclusive of items shown separately below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$870.30M	USD	1 Quarter
Cost of Sales (exclusive of items shown separately below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$354.04M	USD	1 Quarter
Cost of Sales (exclusive of items shown separately below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$354.04M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationAndAmortization`	$57.00M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationAndAmortization`	$57.00M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationAndAmortization`	$121.56M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationAndAmortization`	$121.56M	USD	1 Quarter
General and Administrative Costs	`GeneralAndAdministrativeExpense`	$20.63M	USD	1 Quarter
General and Administrative Costs	`GeneralAndAdministrativeExpense`	$20.63M	USD	1 Quarter
General and Administrative Costs	`GeneralAndAdministrativeExpense`	$40.14M	USD	1 Quarter
General and Administrative Costs	`GeneralAndAdministrativeExpense`	$40.14M	USD	1 Quarter
Merger-Related Expenses	`NoncashMergerRelatedCosts`	-	USD	1 Quarter
Merger-Related Expenses	`NoncashMergerRelatedCosts`	-	USD	1 Quarter
Merger-Related Expenses	`NoncashMergerRelatedCosts`	$49.18M	USD	1 Quarter
Merger-Related Expenses	`NoncashMergerRelatedCosts`	$49.18M	USD	1 Quarter
Other Operating Income, net	`OtherOperatingIncomeExpenseNet`	$9.86M	USD	1 Quarter
Other Operating Income, net	`OtherOperatingIncomeExpenseNet`	$9.86M	USD	1 Quarter
Other Operating Income, net	`OtherOperatingIncomeExpenseNet`	$9.02M	USD	1 Quarter
Other Operating Income, net	`OtherOperatingIncomeExpenseNet`	$9.02M	USD	1 Quarter
Costs and Expenses, Total	`CostsAndExpenses`	$1.07B	USD	1 Quarter
Costs and Expenses, Total	`CostsAndExpenses`	$1.07B	USD	1 Quarter
Costs and Expenses, Total	`CostsAndExpenses`	$422.65M	USD	1 Quarter
Costs and Expenses, Total	`CostsAndExpenses`	$422.65M	USD	1 Quarter
(Loss) Income from Operations	`OperatingIncomeLoss`	$124.04M	USD	1 Quarter
(Loss) Income from Operations	`OperatingIncomeLoss`	$124.04M	USD	1 Quarter
(Loss) Income from Operations	`OperatingIncomeLoss`	$-53.91M	USD	1 Quarter
(Loss) Income from Operations	`OperatingIncomeLoss`	$-53.91M	USD	1 Quarter
Interest Expense	`InterestExpenseNonoperating`	$8.02M	USD	1 Quarter
Interest Expense	`InterestExpenseNonoperating`	$8.02M	USD	1 Quarter
Interest Expense	`InterestExpenseNonoperating`	$5.41M	USD	1 Quarter
Interest Expense	`InterestExpenseNonoperating`	$5.41M	USD	1 Quarter
Interest Income	`InvestmentIncomeInterest`	$4.50M	USD	1 Quarter
Interest Income	`InvestmentIncomeInterest`	$4.50M	USD	1 Quarter
Interest Income	`InvestmentIncomeInterest`	$6.32M	USD	1 Quarter
Interest Income	`InvestmentIncomeInterest`	$6.32M	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-11.68M	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-11.68M	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	-	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	-	USD	1 Quarter
Non-Service Related Pension and Postretirement Benefit Costs	`PensionAndOtherPostretirementBenefitExpense`	$4.40M	USD	1 Quarter
Non-Service Related Pension and Postretirement Benefit Costs	`PensionAndOtherPostretirementBenefitExpense`	$4.40M	USD	1 Quarter
Non-Service Related Pension and Postretirement Benefit Costs	`PensionAndOtherPostretirementBenefitExpense`	$6.20M	USD	1 Quarter
Non-Service Related Pension and Postretirement Benefit Costs	`PensionAndOtherPostretirementBenefitExpense`	$6.20M	USD	1 Quarter
(Loss) Earnings Before Income Tax	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$118.73M	USD	1 Quarter
(Loss) Earnings Before Income Tax	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$118.73M	USD	1 Quarter
(Loss) Earnings Before Income Tax	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-73.49M	USD	1 Quarter
(Loss) Earnings Before Income Tax	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-73.49M	USD	1 Quarter
Income Tax (Benefit) Expense	`IncomeTaxExpenseBenefit`	$-4.22M	USD	1 Quarter
Income Tax (Benefit) Expense	`IncomeTaxExpenseBenefit`	$-4.22M	USD	1 Quarter
Income Tax (Benefit) Expense	`IncomeTaxExpenseBenefit`	$16.84M	USD	1 Quarter
Income Tax (Benefit) Expense	`IncomeTaxExpenseBenefit`	$16.84M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Total Basic (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareBasic`	$3.40	USD	1 Quarter
Total Basic (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareBasic`	$3.40	USD	1 Quarter
Total Basic (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareBasic`	$-1.38	USD	1 Quarter
Total Basic (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareBasic`	$-1.38	USD	1 Quarter
Total Dilutive (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareDiluted`	$-1.38	USD	1 Quarter
Total Dilutive (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareDiluted`	$-1.38	USD	1 Quarter
Total Dilutive (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareDiluted`	$3.39	USD	1 Quarter
Total Dilutive (Loss) Earnings per Share (in dollars per share)	`EarningsPerShareDiluted`	$3.39	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	-	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	-	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.10	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.10	USD	1 Quarter

Cash Flow Statement 160 line items

Line Item	Tag	Value	Unit	Period
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationDepletionAndAmortization`	$57.00M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationDepletionAndAmortization`	$57.00M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationDepletionAndAmortization`	$121.56M	USD	1 Quarter
Depreciation, Depletion and Amortization	`DepreciationDepletionAndAmortization`	$121.56M	USD	1 Quarter
Gain on Sale of Assets	`GainLossOnDispositionOfAssets1`	$5.82M	USD	1 Quarter
Gain on Sale of Assets	`GainLossOnDispositionOfAssets1`	$5.82M	USD	1 Quarter
Gain on Sale of Assets	`GainLossOnDispositionOfAssets1`	$6.08M	USD	1 Quarter
Gain on Sale of Assets	`GainLossOnDispositionOfAssets1`	$6.08M	USD	1 Quarter
Stock-Based Compensation	`ShareBasedCompensation`	$36.09M	USD	1 Quarter
Stock-Based Compensation	`ShareBasedCompensation`	$36.09M	USD	1 Quarter
Stock-Based Compensation	`ShareBasedCompensation`	$5.12M	USD	1 Quarter
Stock-Based Compensation	`ShareBasedCompensation`	$5.12M	USD	1 Quarter
Amortization of Debt Issuance Costs	`AmortizationOfFinancingCosts`	$1.18M	USD	1 Quarter
Amortization of Debt Issuance Costs	`AmortizationOfFinancingCosts`	$1.18M	USD	1 Quarter
Amortization of Debt Issuance Costs	`AmortizationOfFinancingCosts`	$937.00K	USD	1 Quarter
Amortization of Debt Issuance Costs	`AmortizationOfFinancingCosts`	$937.00K	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-11.68M	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-11.68M	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	-	USD	1 Quarter
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	-	USD	1 Quarter
Deferred Income Taxes	`DeferredIncomeTaxExpenseBenefit`	$-4.19M	USD	1 Quarter
Deferred Income Taxes	`DeferredIncomeTaxExpenseBenefit`	$-4.19M	USD	1 Quarter
Deferred Income Taxes	`DeferredIncomeTaxExpenseBenefit`	$74.00K	USD	1 Quarter
Deferred Income Taxes	`DeferredIncomeTaxExpenseBenefit`	$74.00K	USD	1 Quarter
Other Adjustments to Net (Loss) Income	`OtherNoncashIncomeExpense`	$-1.88M	USD	1 Quarter
Other Adjustments to Net (Loss) Income	`OtherNoncashIncomeExpense`	$-1.88M	USD	1 Quarter
Other Adjustments to Net (Loss) Income	`OtherNoncashIncomeExpense`	$776.00K	USD	1 Quarter
Other Adjustments to Net (Loss) Income	`OtherNoncashIncomeExpense`	$776.00K	USD	1 Quarter
Accounts and Notes Receivable	`IncreaseDecreaseInAccountsAndNotesReceivable`	$19.62M	USD	1 Quarter
Accounts and Notes Receivable	`IncreaseDecreaseInAccountsAndNotesReceivable`	$19.62M	USD	1 Quarter
Accounts and Notes Receivable	`IncreaseDecreaseInAccountsAndNotesReceivable`	$94.37M	USD	1 Quarter
Accounts and Notes Receivable	`IncreaseDecreaseInAccountsAndNotesReceivable`	$94.37M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$21.34M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$21.34M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-15.38M	USD	1 Quarter
Inventories	`IncreaseDecreaseInInventories`	$-15.38M	USD	1 Quarter
Other Current Assets	`IncreaseDecreaseInOtherCurrentAssets`	$-2.41M	USD	1 Quarter
Other Current Assets	`IncreaseDecreaseInOtherCurrentAssets`	$-2.41M	USD	1 Quarter
Other Current Assets	`IncreaseDecreaseInOtherCurrentAssets`	$22.00M	USD	1 Quarter
Other Current Assets	`IncreaseDecreaseInOtherCurrentAssets`	$22.00M	USD	1 Quarter
Changes in Other Assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$-21.77M	USD	1 Quarter
Changes in Other Assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$-21.77M	USD	1 Quarter
Changes in Other Assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$1.38M	USD	1 Quarter
Changes in Other Assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$1.38M	USD	1 Quarter
Accounts Payable	`IncreaseDecreaseInAccountsPayable`	$-54.05M	USD	1 Quarter
Accounts Payable	`IncreaseDecreaseInAccountsPayable`	$-54.05M	USD	1 Quarter
Accounts Payable	`IncreaseDecreaseInAccountsPayable`	$3.18M	USD	1 Quarter
Accounts Payable	`IncreaseDecreaseInAccountsPayable`	$3.18M	USD	1 Quarter
Other Operating Liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$-35.23M	USD	1 Quarter
Other Operating Liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$-35.23M	USD	1 Quarter
Other Operating Liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$-26.07M	USD	1 Quarter
Other Operating Liabilities	`IncreaseDecreaseInOtherCurrentLiabilities`	$-26.07M	USD	1 Quarter
Payments on Asset Retirement Obligations	`IncreaseDecreaseInAssetRetirementObligations`	$-6.18M	USD	1 Quarter
Payments on Asset Retirement Obligations	`IncreaseDecreaseInAssetRetirementObligations`	$-6.18M	USD	1 Quarter
Payments on Asset Retirement Obligations	`IncreaseDecreaseInAssetRetirementObligations`	$-5.81M	USD	1 Quarter
Payments on Asset Retirement Obligations	`IncreaseDecreaseInAssetRetirementObligations`	$-5.81M	USD	1 Quarter
Changes in Other Liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-12.07M	USD	1 Quarter
Changes in Other Liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-12.07M	USD	1 Quarter
Changes in Other Liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-28.06M	USD	1 Quarter
Changes in Other Liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-28.06M	USD	1 Quarter
Net Cash (Used in) Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$-109.64M	USD	1 Quarter
Net Cash (Used in) Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$-109.64M	USD	1 Quarter
Net Cash (Used in) Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$77.48M	USD	1 Quarter
Net Cash (Used in) Provided by Operating Activities	`NetCashProvidedByUsedInOperatingActivities`	$77.48M	USD	1 Quarter
Capital Expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$64.82M	USD	1 Quarter
Capital Expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$64.82M	USD	1 Quarter
Capital Expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$42.35M	USD	1 Quarter
Capital Expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$42.35M	USD	1 Quarter
Proceeds from Sales of Assets	`ProceedsFromSaleOfProductiveAssets`	$6.00M	USD	1 Quarter
Proceeds from Sales of Assets	`ProceedsFromSaleOfProductiveAssets`	$6.00M	USD	1 Quarter
Proceeds from Sales of Assets	`ProceedsFromSaleOfProductiveAssets`	$6.19M	USD	1 Quarter
Proceeds from Sales of Assets	`ProceedsFromSaleOfProductiveAssets`	$6.19M	USD	1 Quarter
Proceeds from Sales of Short-Term Investments	`ProceedsFromSaleOfShortTermInvestments`	$80.17M	USD	1 Quarter
Proceeds from Sales of Short-Term Investments	`ProceedsFromSaleOfShortTermInvestments`	$80.17M	USD	1 Quarter
Proceeds from Sales of Short-Term Investments	`ProceedsFromSaleOfShortTermInvestments`	$15.54M	USD	1 Quarter
Proceeds from Sales of Short-Term Investments	`ProceedsFromSaleOfShortTermInvestments`	$15.54M	USD	1 Quarter
Purchases of Short-Term Investments	`PaymentsToAcquireShortTermInvestments`	$4.80M	USD	1 Quarter
Purchases of Short-Term Investments	`PaymentsToAcquireShortTermInvestments`	$4.80M	USD	1 Quarter
Purchases of Short-Term Investments	`PaymentsToAcquireShortTermInvestments`	$15.33M	USD	1 Quarter
Purchases of Short-Term Investments	`PaymentsToAcquireShortTermInvestments`	$15.33M	USD	1 Quarter
Net Cash and Restricted Cash Acquired from Merger	`CashAcquiredFromAcquisition`	-	USD	1 Quarter
Net Cash and Restricted Cash Acquired from Merger	`CashAcquiredFromAcquisition`	-	USD	1 Quarter
Net Cash and Restricted Cash Acquired from Merger	`CashAcquiredFromAcquisition`	$368.73M	USD	1 Quarter
Net Cash and Restricted Cash Acquired from Merger	`CashAcquiredFromAcquisition`	$368.73M	USD	1 Quarter
Purchase of Arch Tax-Exempt Bonds	`PaymentsToAcquireInvestments`	-	USD	1 Quarter
Purchase of Arch Tax-Exempt Bonds	`PaymentsToAcquireInvestments`	-	USD	1 Quarter
Purchase of Arch Tax-Exempt Bonds	`PaymentsToAcquireInvestments`	$98.22M	USD	1 Quarter
Purchase of Arch Tax-Exempt Bonds	`PaymentsToAcquireInvestments`	$98.22M	USD	1 Quarter
Other Investing Activity	`PaymentsForProceedsFromOtherInvestingActivities`	$348.00K	USD	1 Quarter
Other Investing Activity	`PaymentsForProceedsFromOtherInvestingActivities`	$348.00K	USD	1 Quarter
Other Investing Activity	`PaymentsForProceedsFromOtherInvestingActivities`	$4.03M	USD	1 Quarter
Other Investing Activity	`PaymentsForProceedsFromOtherInvestingActivities`	$4.03M	USD	1 Quarter
Net Cash Provided by (Used in) Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-36.30M	USD	1 Quarter
Net Cash Provided by (Used in) Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$-36.30M	USD	1 Quarter
Net Cash Provided by (Used in) Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$283.01M	USD	1 Quarter
Net Cash Provided by (Used in) Investing Activities	`NetCashProvidedByUsedInInvestingActivities`	$283.01M	USD	1 Quarter
Payments on Finance Lease Obligations	`FinanceLeasePrincipalPayments`	$2.79M	USD	1 Quarter
Payments on Finance Lease Obligations	`FinanceLeasePrincipalPayments`	$2.79M	USD	1 Quarter
Payments on Finance Lease Obligations	`FinanceLeasePrincipalPayments`	$3.41M	USD	1 Quarter
Payments on Finance Lease Obligations	`FinanceLeasePrincipalPayments`	$3.41M	USD	1 Quarter
Proceeds from Long-Term Debt	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	1 Quarter
Proceeds from Long-Term Debt	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	1 Quarter
Proceeds from Long-Term Debt	`ProceedsFromIssuanceOfLongTermDebt`	$114.44M	USD	1 Quarter
Proceeds from Long-Term Debt	`ProceedsFromIssuanceOfLongTermDebt`	$114.44M	USD	1 Quarter
Payments on Other Debt	`RepaymentsOfOtherDebt`	$253.00K	USD	1 Quarter
Payments on Other Debt	`RepaymentsOfOtherDebt`	$253.00K	USD	1 Quarter
Payments on Other Debt	`RepaymentsOfOtherDebt`	$10.83M	USD	1 Quarter
Payments on Other Debt	`RepaymentsOfOtherDebt`	$10.83M	USD	1 Quarter
Shares Withheld for Taxes	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$14.07M	USD	1 Quarter
Shares Withheld for Taxes	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$14.07M	USD	1 Quarter
Shares Withheld for Taxes	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$5.55M	USD	1 Quarter
Shares Withheld for Taxes	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$5.55M	USD	1 Quarter
Repurchases of Common Stock	`PaymentsForRepurchaseOfCommonStock`	$57.88M	USD	1 Quarter
Repurchases of Common Stock	`PaymentsForRepurchaseOfCommonStock`	$57.88M	USD	1 Quarter
Repurchases of Common Stock	`PaymentsForRepurchaseOfCommonStock`	$101.26M	USD	1 Quarter
Repurchases of Common Stock	`PaymentsForRepurchaseOfCommonStock`	$101.26M	USD	1 Quarter
Debt-Related Financing Fees	`PaymentsOfFinancingCosts`	-	USD	1 Quarter
Debt-Related Financing Fees	`PaymentsOfFinancingCosts`	-	USD	1 Quarter
Debt-Related Financing Fees	`PaymentsOfFinancingCosts`	$16.38M	USD	1 Quarter
Debt-Related Financing Fees	`PaymentsOfFinancingCosts`	$16.38M	USD	1 Quarter
Dividends and Dividend Equivalents Paid	`PaymentsOfDividends`	$10.70M	USD	1 Quarter
Dividends and Dividend Equivalents Paid	`PaymentsOfDividends`	$10.70M	USD	1 Quarter
Dividends and Dividend Equivalents Paid	`PaymentsOfDividends`	$582.00K	USD	1 Quarter
Dividends and Dividend Equivalents Paid	`PaymentsOfDividends`	$582.00K	USD	1 Quarter
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-41.59M	USD	1 Quarter
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-41.59M	USD	1 Quarter
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-67.68M	USD	1 Quarter
Net Cash Used in Financing Activities	`NetCashProvidedByUsedInFinancingActivities`	$-67.68M	USD	1 Quarter
Net Increase (Decrease) in Cash and Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$131.78M	USD	1 Quarter
Net Increase (Decrease) in Cash and Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$131.78M	USD	1 Quarter
Net Increase (Decrease) in Cash and Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-26.49M	USD	1 Quarter
Net Increase (Decrease) in Cash and Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-26.49M	USD	1 Quarter
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$216.78M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$216.78M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$243.27M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$243.27M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$579.33M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$579.33M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$447.54M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$447.54M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$216.78M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$216.78M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$243.27M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$243.27M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$579.33M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$579.33M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$447.54M	USD	Point-in-time
Cash and Cash Equivalents and Restricted Cash at End of Period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$447.54M	USD	Point-in-time
Equipment Financing	`CapitalExpendituresIncurredButNotYetPaid`	$39.15M	USD	1 Quarter
Equipment Financing	`CapitalExpendituresIncurredButNotYetPaid`	$39.15M	USD	1 Quarter
Equipment Financing	`CapitalExpendituresIncurredButNotYetPaid`	-	USD	1 Quarter
Equipment Financing	`CapitalExpendituresIncurredButNotYetPaid`	-	USD	1 Quarter
Equity Issued as Consideration for Merger	`EquityIssuedAsConsiderationForMerger`	-	USD	1 Quarter
Equity Issued as Consideration for Merger	`EquityIssuedAsConsiderationForMerger`	-	USD	1 Quarter
Equity Issued as Consideration for Merger	`EquityIssuedAsConsiderationForMerger`	$2.58B	USD	1 Quarter
Equity Issued as Consideration for Merger	`EquityIssuedAsConsiderationForMerger`	$2.58B	USD	1 Quarter

Stockholders Equity 72 line items

Line Item	Tag	Value	Unit	Period
Actuarially determined long-term liability adjustments, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-109.00K	USD	1 Quarter
Actuarially determined long-term liability adjustments, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-109.00K	USD	1 Quarter
Actuarially determined long-term liability adjustments, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-111.00K	USD	1 Quarter
Actuarially determined long-term liability adjustments, tax	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax`	$-111.00K	USD	1 Quarter
Investments in available-for-sale securities, tax	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$36.00K	USD	1 Quarter
Investments in available-for-sale securities, tax	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$36.00K	USD	1 Quarter
Investments in available-for-sale securities, tax	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$72.00K	USD	1 Quarter
Investments in available-for-sale securities, tax	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$72.00K	USD	1 Quarter
Repurchases of common stock (in shares)	`StockRepurchasedAndRetiredDuringPeriodShares`	1.38M	shares	1 Quarter
Repurchases of common stock (in shares)	`StockRepurchasedAndRetiredDuringPeriodShares`	1.38M	shares	1 Quarter
Repurchases of common stock (in shares)	`StockRepurchasedAndRetiredDuringPeriodShares`	615,288.00	shares	1 Quarter
Repurchases of common stock (in shares)	`StockRepurchasedAndRetiredDuringPeriodShares`	615,288.00	shares	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	-	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	-	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.10	USD	1 Quarter
Dividends declared per common share (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.10	USD	1 Quarter
Beginning balance	`StockholdersEquity`	$1.39B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$1.39B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$3.90B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$3.90B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$1.34B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$1.34B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$1.57B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$1.57B	USD	Point-in-time
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Actuarially determined long-term liability adjustments	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-385.00K	USD	1 Quarter
Actuarially determined long-term liability adjustments	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-385.00K	USD	1 Quarter
Actuarially determined long-term liability adjustments	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-378.00K	USD	1 Quarter
Actuarially determined long-term liability adjustments	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-378.00K	USD	1 Quarter
Investments in available-for-sale securities	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-301.00K	USD	1 Quarter
Investments in available-for-sale securities	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-301.00K	USD	1 Quarter
Investments in available-for-sale securities	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-126.00K	USD	1 Quarter
Investments in available-for-sale securities	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-126.00K	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$102.15M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$102.15M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$-69.20M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$-69.20M	USD	1 Quarter
Issuance of Common Stock	`StockIssuedDuringPeriodValueNewIssues`	-	USD	1 Quarter
Issuance of Common Stock	`StockIssuedDuringPeriodValueNewIssues`	-	USD	1 Quarter
Issuance of Common Stock	`StockIssuedDuringPeriodValueNewIssues`	-	USD	1 Quarter
Issuance of Common Stock	`StockIssuedDuringPeriodValueNewIssues`	-	USD	1 Quarter
Merger with Arch Resources, Inc.	`StockIssuedDuringPeriodValueAcquisitions`	$2.48B	USD	1 Quarter
Merger with Arch Resources, Inc.	`StockIssuedDuringPeriodValueAcquisitions`	$2.48B	USD	1 Quarter
Repurchases of common stock	`StockRepurchasedAndRetiredDuringPeriodValue`	$101.26M	USD	1 Quarter
Repurchases of common stock	`StockRepurchasedAndRetiredDuringPeriodValue`	$101.26M	USD	1 Quarter
Repurchases of common stock	`StockRepurchasedAndRetiredDuringPeriodValue`	$55.88M	USD	1 Quarter
Repurchases of common stock	`StockRepurchasedAndRetiredDuringPeriodValue`	$55.88M	USD	1 Quarter
Excise Tax on Repurchases of Common Stock	`StockRepurchasedDuringPeriodExciseTaxes`	$471.00K	USD	1 Quarter
Excise Tax on Repurchases of Common Stock	`StockRepurchasedDuringPeriodExciseTaxes`	$471.00K	USD	1 Quarter
Employee Stock-Based Compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$5.13M	USD	1 Quarter
Employee Stock-Based Compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$5.13M	USD	1 Quarter
Employee Stock-Based Compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$36.09M	USD	1 Quarter
Employee Stock-Based Compensation	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$36.09M	USD	1 Quarter
Shares Withheld for Taxes	`AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation`	$14.07M	USD	1 Quarter
Shares Withheld for Taxes	`AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation`	$14.07M	USD	1 Quarter
Shares Withheld for Taxes	`AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation`	$5.55M	USD	1 Quarter
Shares Withheld for Taxes	`AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation`	$5.55M	USD	1 Quarter
Dividends on common shares	`DividendsCommonStock`	$5.36M	USD	1 Quarter
Dividends on common shares	`DividendsCommonStock`	$5.36M	USD	1 Quarter
Dividend Equivalents Earned on Stock-Based Compensation Awards	`DividendsShareBasedCompensation`	$44.00K	USD	1 Quarter
Dividend Equivalents Earned on Stock-Based Compensation Awards	`DividendsShareBasedCompensation`	$44.00K	USD	1 Quarter
Ending balance	`StockholdersEquity`	$1.39B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$1.39B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$3.90B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$3.90B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$1.34B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$1.34B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$1.57B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$1.57B	USD	Point-in-time

Comprehensive Income 28 line items

Line Item	Tag	Value	Unit	Period
Actuarially determined long-term liability adjustment, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-109.00K	USD	1 Quarter
Actuarially determined long-term liability adjustment, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-109.00K	USD	1 Quarter
Actuarially determined long-term liability adjustment, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-111.00K	USD	1 Quarter
Actuarially determined long-term liability adjustment, tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-111.00K	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$101.89M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Net (Loss) Income	`NetIncomeLoss`	$-69.28M	USD	1 Quarter
Unrealized loss on investments in available-for-sale securities, net	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$36.00K	USD	1 Quarter
Unrealized loss on investments in available-for-sale securities, net	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$36.00K	USD	1 Quarter
Unrealized loss on investments in available-for-sale securities, net	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$72.00K	USD	1 Quarter
Unrealized loss on investments in available-for-sale securities, net	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax`	$72.00K	USD	1 Quarter
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($109), ($111))	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-385.00K	USD	1 Quarter
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($109), ($111))	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-385.00K	USD	1 Quarter
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($109), ($111))	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-378.00K	USD	1 Quarter
Actuarially Determined Long-Term Liability Adjustments (Net of tax: ($109), ($111))	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-378.00K	USD	1 Quarter
Unrealized Loss on Investments in Available-for-Sale Securities (Net of tax: $72, $36)	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-301.00K	USD	1 Quarter
Unrealized Loss on Investments in Available-for-Sale Securities (Net of tax: $72, $36)	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-301.00K	USD	1 Quarter
Unrealized Loss on Investments in Available-for-Sale Securities (Net of tax: $72, $36)	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-126.00K	USD	1 Quarter
Unrealized Loss on Investments in Available-for-Sale Securities (Net of tax: $72, $36)	`OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax`	$-126.00K	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$259.00K	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$259.00K	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$77.00K	USD	1 Quarter
Other Comprehensive Income	`OtherComprehensiveIncomeLossNetOfTax`	$77.00K	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$102.15M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$102.15M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$-69.20M	USD	1 Quarter
Comprehensive Income	`ComprehensiveIncomeNetOfTax`	$-69.20M	USD	1 Quarter

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.