10-K Filing

ALPHA METALLURGICAL RESOURCES, INC. CIK: 1704715 FY 2019

Filing Information

Form Type	10-K
Accession Number	`0001704715-20-000010`
Period End Date	20191231
Filing Date	20200318
Fiscal Year	2019
Fiscal Period	FY
XBRL Instance	ctra-20191231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 105 Income Statement 221 Cash Flow Statement 210 Stockholders Equity 38 Comprehensive Income 35

Balance Sheet 105 line items

Line Item	Tag	Value	Unit	Period
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	-	USD	Point-in-time
Allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	-	USD	Point-in-time
Other acquired intangibles, accumulated amortization	`FiniteLivedIntangibleAssetsAccumulatedAmortization`	$32.69M	USD	Point-in-time
Other acquired intangibles, accumulated amortization	`FiniteLivedIntangibleAssetsAccumulatedAmortization`	$20.27M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$233.60M	USD	Point-in-time
Less accumulated depreciation, depletion and amortization	`PropertyPlantandEquipmentandFinanceLeaseRightofUseAssetAccumulatedDepreciationandAmortization`	$314.28M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$212.79M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$141.92M	USD	Point-in-time
Less accumulated depreciation, depletion and amortization	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$106.77M	USD	Point-in-time
Trade accounts receivable, net of allowance for doubtful accounts of $0 as of December 31, 2019 and 2018	`AccountsReceivableNetCurrent`	$244.67M	USD	Point-in-time
Trade accounts receivable, net of allowance for doubtful accounts of $0 as of December 31, 2019 and 2018	`AccountsReceivableNetCurrent`	$292.62M	USD	Point-in-time
Inventories, net	`InventoryNet`	$162.66M	USD	Point-in-time
Inventories, net	`InventoryNet`	$121.97M	USD	Point-in-time
Owned and leased mineral rights, accumulated depletion and amortization	`MineralPropertiesAccumulatedDepletion`	$27.88M	USD	Point-in-time
Owned and leased mineral rights, accumulated depletion and amortization	`MineralPropertiesAccumulatedDepletion`	$11.39M	USD	Point-in-time
Prepaid expenses and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$91.36M	USD	Point-in-time
Prepaid expenses and other current assets	`PrepaidExpenseAndOtherAssetsCurrent`	$158.94M	USD	Point-in-time
Preferred stock, par value (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Preferred stock, par value (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Preferred stock, shares authorized (in shares)	`PreferredStockSharesAuthorized`	5.00M	shares	Point-in-time
Current assets - discontinued operations	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$22.48M	USD	Point-in-time
Current assets - discontinued operations	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	-	USD	Point-in-time
Preferred stock, shares authorized (in shares)	`PreferredStockSharesAuthorized`	5.00M	shares	Point-in-time
Preferred stock, shares issued (in shares)	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Preferred stock, shares issued (in shares)	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Total current assets	`AssetsCurrent`	$711.48M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$829.60M	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
Property, plant, and equipment, net of accumulated depreciation and amortization of $314,276 and $106,766 as of December 31, 2019 and 2018	`PropertyPlantandEquipmentandFinanceLeaseRightofUseAssetafterAccumulatedDepreciationandAmortization`	$583.26M	USD	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	50.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	50.00M	shares	Point-in-time
Property, plant, and equipment, net of accumulated depreciation and amortization of $314,276 and $106,766 as of December 31, 2019 and 2018	`PropertyPlantAndEquipmentNet`	$699.99M	USD	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	20.20M	shares	Point-in-time
Owned and leased mineral rights, net of accumulated depletion and amortization of $27,877 and $11,390 as of December 31, 2019 and 2018	`MineralRights`	$523.14M	USD	Point-in-time
Owned and leased mineral rights, net of accumulated depletion and amortization of $27,877 and $11,390 as of December 31, 2019 and 2018	`MineralRights`	$528.23M	USD	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	20.50M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	18.20M	shares	Point-in-time
Goodwill	`Goodwill`	$95.62M	USD	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	19.10M	shares	Point-in-time
Goodwill	`Goodwill`	-	USD	Point-in-time
Treasury stock, shares at cost (in shares)	`TreasuryStockCommonShares`	1.10M	shares	Point-in-time
Other acquired intangibles, net of accumulated amortization of $32,686 and $20,267 as of December 31, 2019 and 2018	`IntangibleAssetsNetExcludingGoodwill`	$154.58M	USD	Point-in-time
Treasury stock, shares at cost (in shares)	`TreasuryStockCommonShares`	2.30M	shares	Point-in-time
Other acquired intangibles, net of accumulated amortization of $32,686 and $20,267 as of December 31, 2019 and 2018	`IntangibleAssetsNetExcludingGoodwill`	$125.14M	USD	Point-in-time
Long-term restricted cash	`RestrictedCashNoncurrent`	$122.52M	USD	Point-in-time
Long-term restricted cash	`RestrictedCashNoncurrent`	$227.17M	USD	Point-in-time
Long-term restricted cash	`RestrictedCashNoncurrent`	$40.42M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	$33.06M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxAssetsNet`	$27.18M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$204.21M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$183.68M	USD	Point-in-time
Total assets	`Assets`	$2.30B	USD	Point-in-time
Total assets	`Assets`	$2.75B	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$42.74M	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtAndCapitalLeaseObligationsCurrent`	$28.48M	USD	Point-in-time
Trade accounts payable	`AccountsPayableCurrent`	$98.75M	USD	Point-in-time
Trade accounts payable	`AccountsPayableCurrent`	$114.57M	USD	Point-in-time
Acquisition-related obligations - current	`AcquisitionRelatedObligationsCarryingAmountCurrent`	$27.33M	USD	Point-in-time
Acquisition-related obligations - current	`AcquisitionRelatedObligationsCarryingAmountCurrent`	$33.64M	USD	Point-in-time
Accrued expenses and other current liabilities	`AccruedLiabilitiesandOtherLiabilitiesCurrent`	$148.70M	USD	Point-in-time
Accrued expenses and other current liabilities	`AccruedLiabilitiesandOtherLiabilitiesCurrent`	$154.28M	USD	Point-in-time
Current liabilities - discontinued operations	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$21.89M	USD	Point-in-time
Current liabilities - discontinued operations	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	-	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$315.15M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$355.24M	USD	Point-in-time
Long-term debt	`LongTermDebtAndCapitalLeaseObligations`	$564.48M	USD	Point-in-time
Long-term debt	`LongTermDebtAndCapitalLeaseObligations`	$545.27M	USD	Point-in-time
Acquisition-related obligations - long-term	`AcquisitionRelatedObligationsCarryingAmountNoncurrent`	$46.26M	USD	Point-in-time
Acquisition-related obligations - long-term	`AcquisitionRelatedObligationsCarryingAmountNoncurrent`	$73.00M	USD	Point-in-time
Workers compensation and black lung obligations	`LiabilityDefinedBenefitPlanPostretirementBlackLungHealthCoverageandWorkersCompensationNoncurrent`	$260.78M	USD	Point-in-time
Workers compensation and black lung obligations	`LiabilityDefinedBenefitPlanPostretirementBlackLungHealthCoverageandWorkersCompensationNoncurrent`	$249.29M	USD	Point-in-time
Pension obligations	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$204.09M	USD	Point-in-time
Pension obligations	`DefinedBenefitPensionPlanLiabilitiesNoncurrent`	$180.80M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$184.13M	USD	Point-in-time
Asset retirement obligations	`AssetRetirementObligationsNoncurrent`	$203.69M	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$422.00K	USD	Point-in-time
Deferred income taxes	`DeferredIncomeTaxLiabilitiesNet`	$15.12M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$52.41M	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$31.39M	USD	Point-in-time
Non-current liabilities - discontinued operations	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	-	USD	Point-in-time
Non-current liabilities - discontinued operations	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationNoncurrent`	$94.00K	USD	Point-in-time
Total liabilities	`Liabilities`	$1.61B	USD	Point-in-time
Total liabilities	`Liabilities`	$1.67B	USD	Point-in-time
Commitments and Contingencies (Note 23)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and Contingencies (Note 23)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Preferred stock - par value $0.01, 5.0 million shares authorized at December 31, 2019 and 2018, none issued	`PreferredStockValue`	-	USD	Point-in-time
Preferred stock - par value $0.01, 5.0 million shares authorized at December 31, 2019 and 2018, none issued	`PreferredStockValue`	-	USD	Point-in-time
Common stock - par value $0.01, 50.0 million shares authorized, 20.5 million issued and 18.2 million outstanding at December 31, 2019 and 20.2 million issued and 19.1 million outstanding at December 31, 2018	`CommonStockValue`	$205.00K	USD	Point-in-time
Common stock - par value $0.01, 50.0 million shares authorized, 20.5 million issued and 18.2 million outstanding at December 31, 2019 and 20.2 million issued and 19.1 million outstanding at December 31, 2018	`CommonStockValue`	$202.00K	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$761.30M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$775.71M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-23.13M	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-58.62M	USD	Point-in-time
Treasury stock, at cost: 2.3 million shares at December 31, 2019 and 1.1 million shares at December 31, 2018	`TreasuryStockValue`	$107.98M	USD	Point-in-time
Treasury stock, at cost: 2.3 million shares at December 31, 2019 and 1.1 million shares at December 31, 2018	`TreasuryStockValue`	$70.36M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$403.13M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$86.81M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$1.07B	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$37.22M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$92.65M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$696.12M	USD	Point-in-time
Total liabilities and stockholders equity	`LiabilitiesAndStockholdersEquity`	$2.75B	USD	Point-in-time
Total liabilities and stockholders equity	`LiabilitiesAndStockholdersEquity`	$2.30B	USD	Point-in-time

Income Statement 221 line items

Line Item	Tag	Value	Unit	Period
Revenue from contract with customer	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.28B	USD	Annual
Revenue from contract with customer	`RevenueFromContractWithCustomerExcludingAssessedTax`	$1.64B	USD	Annual
Revenue from contract with customer	`RevenueFromContractWithCustomerExcludingAssessedTax`	$2.02B	USD	Annual
Other revenues	`OtherIncome`	$8.25M	USD	Annual
Other revenues	`OtherIncome`	$10.09M	USD	Annual
Other revenues	`OtherIncome`	$10.32M	USD	Annual
Total revenues	`Revenues`	$656.21M	USD	1 Quarter
Total revenues	`Revenues`	$2.03B	USD	Annual
Total revenues	`Revenues`	$499.08M	USD	1 Quarter
Total revenues	`Revenues`	$2.29B	USD	Annual
Total revenues	`Revenues`	$447.87M	USD	1 Quarter
Total revenues	`Revenues`	$572.08M	USD	1 Quarter
Total revenues	`Revenues`	$528.92M	USD	1 Quarter
Total revenues	`Revenues`	$1.65B	USD	Annual
Total revenues	`Revenues`	$482.33M	USD	1 Quarter
Total revenues	`Revenues`	$525.86M	USD	1 Quarter
Total revenues	`Revenues`	$609.11M	USD	1 Quarter
Cost of coal sales (exclusive of items shown separately below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$1.33B	USD	Annual
Cost of coal sales (exclusive of items shown separately below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$1.92B	USD	Annual
Cost of coal sales (exclusive of items shown separately below)	`CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization`	$1.66B	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles`	$77.55M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles`	$228.79M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles`	$34.91M	USD	Annual
Accretion on asset retirement obligations	`AssetRetirementObligationAccretionExpense`	$9.97M	USD	Annual
Accretion on asset retirement obligations	`AssetRetirementObligationAccretionExpense`	$9.93M	USD	Annual
Accretion on asset retirement obligations	`AssetRetirementObligationAccretionExpense`	$27.80M	USD	Annual
Amortization of acquired intangibles, net	`AmortizationofIntangibles`	$-88.00K	USD	Annual
Amortization of acquired intangibles, net	`AmortizationofIntangibles`	$-5.39M	USD	Annual
Amortization of acquired intangibles, net	`AmortizationofIntangibles`	$59.01M	USD	Annual
Selling, general and administrative expenses (exclusive of depreciation, depletion and amortization shown separately above)	`SellingGeneralAndAdministrativeExpense`	$78.95M	USD	Annual
Selling, general and administrative expenses (exclusive of depreciation, depletion and amortization shown separately above)	`SellingGeneralAndAdministrativeExpense`	$67.46M	USD	Annual
Selling, general and administrative expenses (exclusive of depreciation, depletion and amortization shown separately above)	`SellingGeneralAndAdministrativeExpense`	$59.27M	USD	Annual
Merger-related costs	`BusinessAcquisitionIntegrationandOtherRelatedCosts`	$1.18M	USD	1 Quarter
Merger-related costs	`BusinessAcquisitionIntegrationandOtherRelatedCosts`	$1.09M	USD	Annual
Merger-related costs	`BusinessAcquisitionIntegrationandOtherRelatedCosts`	$460.00K	USD	1 Quarter
Merger-related costs	`BusinessAcquisitionIntegrationandOtherRelatedCosts`	$46.74M	USD	1 Quarter
Merger-related costs	`BusinessAcquisitionIntegrationandOtherRelatedCosts`	$51.80M	USD	Annual
Merger-related costs	`BusinessAcquisitionIntegrationandOtherRelatedCosts`	$3.42M	USD	1 Quarter
Merger-related costs	`BusinessAcquisitionIntegrationandOtherRelatedCosts`	-	USD	Annual
Secondary offering costs	`StockIssuanceCosts`	-	USD	Annual
Secondary offering costs	`StockIssuanceCosts`	-	USD	Annual
Secondary offering costs	`StockIssuanceCosts`	$4.49M	USD	Annual
Asset impairment	`OtherAssetImpairmentCharges`	$66.32M	USD	Annual
Asset impairment	`OtherAssetImpairmentCharges`	-	USD	Annual
Asset impairment	`OtherAssetImpairmentCharges`	-	USD	Annual
Goodwill impairment	`GoodwillImpairmentLoss`	$124.35M	USD	1 Quarter
Goodwill impairment	`GoodwillImpairmentLoss`	-	USD	Annual
Goodwill impairment	`GoodwillImpairmentLoss`	-	USD	Annual
Goodwill impairment	`GoodwillImpairmentLoss`	$124.35M	USD	Annual
Mark-to-market adjustment for acquisition-related obligations	`AcquisitionRelatedObligationsChangesinFairValueGainLoss`	$3.56M	USD	Annual
Mark-to-market adjustment for acquisition-related obligations	`AcquisitionRelatedObligationsChangesinFairValueGainLoss`	$-3.22M	USD	Annual
Mark-to-market adjustment for acquisition-related obligations	`AcquisitionRelatedObligationsChangesinFairValueGainLoss`	$-24.00K	USD	Annual
Gain on settlement of acquisition-related obligations	`AcquisitionRelatedObligationsSettlementGainLoss`	$580.00K	USD	Annual
Gain on settlement of acquisition-related obligations	`AcquisitionRelatedObligationsSettlementGainLoss`	$38.89M	USD	Annual
Gain on settlement of acquisition-related obligations	`AcquisitionRelatedObligationsSettlementGainLoss`	-	USD	Annual
Other (income) expense	`OtherOperatingIncomeExpenseNet`	$16.31M	USD	Annual
Other (income) expense	`OtherOperatingIncomeExpenseNet`	$-178.00K	USD	Annual
Other (income) expense	`OtherOperatingIncomeExpenseNet`	$575.00K	USD	Annual
Total costs and expenses	`CostsAndExpenses`	$2.45B	USD	Annual
Total costs and expenses	`CostsAndExpenses`	$1.47B	USD	Annual
Total costs and expenses	`CostsAndExpenses`	$1.84B	USD	Annual
(Loss) income from operations	`OperatingIncomeLoss`	$-157.53M	USD	Annual
(Loss) income from operations	`OperatingIncomeLoss`	$182.36M	USD	Annual
(Loss) income from operations	`OperatingIncomeLoss`	$193.76M	USD	Annual
Interest expense	`InterestExpense`	$38.81M	USD	Annual
Interest expense	`InterestExpense`	$35.98M	USD	Annual
Interest expense	`InterestExpense`	$66.80M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.95M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$210.00K	USD	Annual
Interest income	`InvestmentIncomeInterest`	$7.30M	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$12.04M	USD	1 Quarter
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-26.46M	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-38.70M	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-12.04M	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-26.46M	USD	1 Quarter
Equity loss in affiliates	`IncomeLossFromEquityMethodInvestments`	$-6.11M	USD	Annual
Equity loss in affiliates	`IncomeLossFromEquityMethodInvestments`	$-3.34M	USD	Annual
Equity loss in affiliates	`IncomeLossFromEquityMethodInvestments`	$-6.87M	USD	Annual
Bargain purchase gain	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	-	USD	Annual
Bargain purchase gain	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	-	USD	Annual
Bargain purchase gain	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	$1.01M	USD	Annual
Miscellaneous (loss) income, net	`OtherNonoperatingIncomeExpense`	$-10.33M	USD	Annual
Miscellaneous (loss) income, net	`OtherNonoperatingIncomeExpense`	$-1.25M	USD	Annual
Miscellaneous (loss) income, net	`OtherNonoperatingIncomeExpense`	$194.00K	USD	Annual
Total other expense, net	`NonoperatingIncomeExpense`	$-76.60M	USD	Annual
Total other expense, net	`NonoperatingIncomeExpense`	$-56.27M	USD	Annual
Total other expense, net	`NonoperatingIncomeExpense`	$-103.17M	USD	Annual
(Loss) income from continuing operations before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$105.76M	USD	Annual
(Loss) income from continuing operations before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$-260.70M	USD	Annual
(Loss) income from continuing operations before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$137.49M	USD	Annual
Income tax benefit	`IncomeTaxExpenseBenefit`	$-67.98M	USD	Annual
Income tax benefit	`IncomeTaxExpenseBenefit`	$-165.50M	USD	1 Quarter
Income tax benefit	`IncomeTaxExpenseBenefit`	$-57.56M	USD	Annual
Income tax benefit	`IncomeTaxExpenseBenefit`	$-165.36M	USD	Annual
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$24.30M	USD	1 Quarter
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$7.99M	USD	1 Quarter
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$14.01M	USD	1 Quarter
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$155.90M	USD	1 Quarter
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$-43.56M	USD	1 Quarter
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$173.74M	USD	Annual
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$-203.14M	USD	Annual
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$58.30M	USD	1 Quarter
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$302.85M	USD	Annual
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$74.64M	USD	1 Quarter
Net income (loss) from continuing operations	`IncomeLossFromContinuingOperations`	$-191.87M	USD	1 Quarter
Loss from discontinued operations before income taxes	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax`	$-36.89M	USD	Annual
Loss from discontinued operations before income taxes	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax`	$-4.99M	USD	Annual
Loss from discontinued operations before income taxes	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax`	$-117.39M	USD	Annual
Income tax benefit from discontinued operations	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$-1.30M	USD	Annual
Income tax benefit from discontinued operations	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$-4.21M	USD	Annual
Income tax benefit from discontinued operations	`DiscontinuedOperationTaxEffectOfDiscontinuedOperation`	$-17.68M	USD	Annual
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-24.97M	USD	1 Quarter
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$50.93M	USD	1 Quarter
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-113.18M	USD	Annual
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-19.21M	USD	Annual
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-137.96M	USD	1 Quarter
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$641.00K	USD	1 Quarter
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.36M	USD	1 Quarter
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-2.12M	USD	1 Quarter
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-1.18M	USD	1 Quarter
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-3.69M	USD	Annual
Loss from discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity`	$-854.00K	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$56.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-140.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$11.89M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-316.32M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$154.52M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$-113.66M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$6.82M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-68.53M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$299.17M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$73.79M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$156.54M	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$-2.29	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.27	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$17.01	USD	Annual
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$10.38	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$7.75	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$6.11	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$-10.54	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$27.61	USD	Annual
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$1.45	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$0.42	USD	1 Quarter
(Loss) Income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerBasicShare`	$-10.80	USD	Annual
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.08	USD	1 Quarter
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.06	USD	1 Quarter
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-6.02	USD	Annual
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.22	USD	1 Quarter
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.33	USD	Annual
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-1.89	USD	Annual
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$0.04	USD	1 Quarter
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$2.79	USD	1 Quarter
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-0.15	USD	1 Quarter
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-7.21	USD	1 Quarter
Loss from discontinued operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare`	$-1.31	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$5.96	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$0.36	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$27.28	USD	Annual
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$-7.75	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$1.23	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$-5.94	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$15.12	USD	Annual
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$-3.60	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$-16.82	USD	Annual
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$7.67	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareBasic`	$10.42	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.25	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$-10.80	USD	Annual
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$7.24	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$-2.29	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$0.41	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$5.66	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$-10.54	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$16.13	USD	Annual
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$9.85	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$1.35	USD	1 Quarter
(Loss) income from continuing operations (in dollars per share)	`IncomeLossFromContinuingOperationsPerDilutedShare`	$25.86	USD	Annual
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-1.31	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-0.13	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-0.06	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-7.10	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$2.79	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-0.32	USD	Annual
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-1.78	USD	Annual
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$0.04	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-0.20	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-0.08	USD	1 Quarter
Loss from discontinuing operations (in dollars per share)	`DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare`	$-6.02	USD	Annual
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$-16.82	USD	Annual
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$9.89	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$14.35	USD	Annual
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$7.16	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$0.35	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$5.53	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$25.54	USD	Annual
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$1.15	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$-3.60	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$-5.85	USD	1 Quarter
Net (loss) income (in dollars per share)	`EarningsPerShareDiluted`	$-7.75	USD	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	18.89M	shares	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	10.97M	shares	Annual
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	9.63M	shares	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	19.03M	shares	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	10.22M	shares	Annual
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	18.81M	shares	Annual
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	9.55M	shares	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	19.12M	shares	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	9.63M	shares	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	15.01M	shares	1 Quarter
Weighted average shares - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	18.20M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	10.31M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	10.29M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	10.38M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	18.20M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	11.71M	shares	Annual
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	18.81M	shares	Annual
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	15.82M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	19.42M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	19.54M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	19.03M	shares	1 Quarter
Weighted average shares - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	10.77M	shares	Annual

Cash Flow Statement 210 line items

Line Item	Tag	Value	Unit	Period
Net (loss) income	`NetIncomeLoss`	$56.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-140.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$11.89M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-316.32M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$154.52M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$-113.66M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$6.82M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-68.53M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$299.17M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$73.79M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$156.54M	USD	1 Quarter
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortizationExcludingAcquiredIntangiblesIncludingDiscontinuedOperations`	$77.55M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortizationExcludingAcquiredIntangiblesIncludingDiscontinuedOperations`	$65.00M	USD	Annual
Depreciation, depletion and amortization	`DepreciationDepletionAndAmortizationExcludingAcquiredIntangiblesIncludingDiscontinuedOperations`	$315.16M	USD	Annual
Amortization of acquired intangibles, net	`AmortizationofIntangibles`	$-88.00K	USD	Annual
Amortization of acquired intangibles, net	`AmortizationofIntangibles`	$-5.39M	USD	Annual
Amortization of acquired intangibles, net	`AmortizationofIntangibles`	$59.01M	USD	Annual
Accretion of acquisition-related obligations discount	`AcquisitionRelatedObligationsDiscountAccretionExpense`	$-7.53M	USD	Annual
Accretion of acquisition-related obligations discount	`AcquisitionRelatedObligationsDiscountAccretionExpense`	$-5.63M	USD	Annual
Accretion of acquisition-related obligations discount	`AcquisitionRelatedObligationsDiscountAccretionExpense`	$-5.52M	USD	Annual
Amortization of debt issuance costs and accretion of debt discount	`AmortizationOfFinancingCostsAndDiscounts`	$14.07M	USD	Annual
Amortization of debt issuance costs and accretion of debt discount	`AmortizationOfFinancingCostsAndDiscounts`	$4.48M	USD	Annual
Amortization of debt issuance costs and accretion of debt discount	`AmortizationOfFinancingCostsAndDiscounts`	$2.88M	USD	Annual
Mark-to-market adjustment for acquisition-related obligations	`AcquisitionRelatedObligationsChangesinFairValueGainLoss`	$3.56M	USD	Annual
Mark-to-market adjustment for acquisition-related obligations	`AcquisitionRelatedObligationsChangesinFairValueGainLoss`	$-3.22M	USD	Annual
Mark-to-market adjustment for acquisition-related obligations	`AcquisitionRelatedObligationsChangesinFairValueGainLoss`	$-24.00K	USD	Annual
Gain on settlement of acquisition-related obligations	`AcquisitionRelatedObligationsSettlementGainLoss`	$580.00K	USD	Annual
Gain on settlement of acquisition-related obligations	`AcquisitionRelatedObligationsSettlementGainLoss`	$38.89M	USD	Annual
Gain on settlement of acquisition-related obligations	`AcquisitionRelatedObligationsSettlementGainLoss`	-	USD	Annual
Loss (gain) on disposal of assets	`GainLossonDispositionofAssetsIncludingCostofSales`	$-8.14M	USD	Annual
Loss (gain) on disposal of assets	`GainLossonDispositionofAssetsIncludingCostofSales`	$16.85M	USD	Annual
Loss (gain) on disposal of assets	`GainLossonDispositionofAssetsIncludingCostofSales`	$570.00K	USD	Annual
Gain on assets acquired in an exchange transaction	`NonmonetaryTransactionGainLossRecognizedOnTransfer`	$9.08M	USD	1 Quarter
Gain on assets acquired in an exchange transaction	`NonmonetaryTransactionGainLossRecognizedOnTransfer`	-	USD	Annual
Gain on assets acquired in an exchange transaction	`NonmonetaryTransactionGainLossRecognizedOnTransfer`	-	USD	Annual
Gain on assets acquired in an exchange transaction	`NonmonetaryTransactionGainLossRecognizedOnTransfer`	$9.08M	USD	Annual
Bargain purchase gain	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	-	USD	Annual
Bargain purchase gain	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	-	USD	Annual
Bargain purchase gain	`BusinessCombinationBargainPurchaseGainRecognizedAmount`	$1.01M	USD	Annual
Accretion on asset retirement obligations	`AssetRetirementObligationAccretionExpenseIncludingAdjustmentforLiabilitiesHeldforSaleandDiscontinuedOperations`	$9.97M	USD	Annual
Accretion on asset retirement obligations	`AssetRetirementObligationAccretionExpenseIncludingAdjustmentforLiabilitiesHeldforSaleandDiscontinuedOperations`	$33.76M	USD	Annual
Accretion on asset retirement obligations	`AssetRetirementObligationAccretionExpenseIncludingAdjustmentforLiabilitiesHeldforSaleandDiscontinuedOperations`	$21.27M	USD	Annual
Employee benefit plans, net	`IncreaseDecreaseInPensionAndPostretirementObligations`	$11.74M	USD	Annual
Employee benefit plans, net	`IncreaseDecreaseInPensionAndPostretirementObligations`	$9.23M	USD	Annual
Employee benefit plans, net	`IncreaseDecreaseInPensionAndPostretirementObligations`	$20.85M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-12.10M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-66.68M	USD	Annual
Deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$-78.74M	USD	Annual
Loss on sale of Powder River Basin	`GainLossOnSaleOfBusiness`	-	USD	Annual
Loss on sale of Powder River Basin	`GainLossOnSaleOfBusiness`	$-36.09M	USD	Annual
Loss on sale of Powder River Basin	`GainLossOnSaleOfBusiness`	-	USD	Annual
Goodwill impairment	`GoodwillImpairmentLoss`	$124.35M	USD	1 Quarter
Goodwill impairment	`GoodwillImpairmentLoss`	-	USD	Annual
Goodwill impairment	`GoodwillImpairmentLoss`	-	USD	Annual
Goodwill impairment	`GoodwillImpairmentLoss`	$124.35M	USD	Annual
Asset impairment	`RestructuringandAssetImpairmentChargesIncludingDiscontinuedOperations`	-	USD	Annual
Asset impairment	`RestructuringandAssetImpairmentChargesIncludingDiscontinuedOperations`	$83.48M	USD	Annual
Asset impairment	`RestructuringandAssetImpairmentChargesIncludingDiscontinuedOperations`	-	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$12.04M	USD	1 Quarter
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-26.46M	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-38.70M	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-12.04M	USD	Annual
Loss on modification and extinguishment of debt	`GainLossonExtinguishmentandModificationofDebt`	$-26.46M	USD	1 Quarter
Stock-based compensation	`ShareBasedCompensation`	$13.35M	USD	Annual
Stock-based compensation	`ShareBasedCompensation`	$12.40M	USD	Annual
Stock-based compensation	`ShareBasedCompensation`	$20.37M	USD	Annual
Equity in loss of affiliates	`IncomeLossfromEquityMethodInvestmentsIncludingDiscontinuedOperations`	$-3.33M	USD	Annual
Equity in loss of affiliates	`IncomeLossfromEquityMethodInvestmentsIncludingDiscontinuedOperations`	$-6.87M	USD	Annual
Equity in loss of affiliates	`IncomeLossfromEquityMethodInvestmentsIncludingDiscontinuedOperations`	$-6.11M	USD	Annual
Other, net	`OtherOperatingActivitiesCashFlowStatement`	$-5.20M	USD	Annual
Other, net	`OtherOperatingActivitiesCashFlowStatement`	$1.64M	USD	Annual
Other, net	`OtherOperatingActivitiesCashFlowStatement`	-	USD	Annual
Trade accounts receivable, net	`IncreaseDecreaseInAccountsReceivable`	$-47.42M	USD	Annual
Trade accounts receivable, net	`IncreaseDecreaseInAccountsReceivable`	$-34.84M	USD	Annual
Trade accounts receivable, net	`IncreaseDecreaseInAccountsReceivable`	$84.14M	USD	Annual
Inventories, net	`IncreaseDecreaseInInventories`	$40.69M	USD	Annual
Inventories, net	`IncreaseDecreaseInInventories`	$-441.00K	USD	Annual
Inventories, net	`IncreaseDecreaseInInventories`	$-33.23M	USD	Annual
Prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-56.67M	USD	Annual
Prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$40.42M	USD	Annual
Prepaid expenses and other current assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$44.27M	USD	Annual
Deposits	`IncreaseDecreaseInDepositOtherAssets`	$7.49M	USD	Annual
Deposits	`IncreaseDecreaseInDepositOtherAssets`	$-15.17M	USD	Annual
Deposits	`IncreaseDecreaseInDepositOtherAssets`	$-38.45M	USD	Annual
Other non-current assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$-24.50M	USD	Annual
Other non-current assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$36.66M	USD	Annual
Other non-current assets	`IncreaseDecreaseInOtherNoncurrentAssets`	$24.46M	USD	Annual
Trade accounts payable	`IncreaseDecreaseInAccountsPayable`	$6.10M	USD	Annual
Trade accounts payable	`IncreaseDecreaseInAccountsPayable`	$-28.15M	USD	Annual
Trade accounts payable	`IncreaseDecreaseInAccountsPayable`	$-7.08M	USD	Annual
Accrued expenses and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$-7.34M	USD	Annual
Accrued expenses and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$-12.21M	USD	Annual
Accrued expenses and other current liabilities	`IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities`	$-25.50M	USD	Annual
Acquisition-related obligations	`IncreaseDecreaseinAcquisitionRelatedObligations`	$14.50M	USD	Annual
Acquisition-related obligations	`IncreaseDecreaseinAcquisitionRelatedObligations`	$22.80M	USD	Annual
Acquisition-related obligations	`IncreaseDecreaseinAcquisitionRelatedObligations`	$28.13M	USD	Annual
Asset retirement obligations	`IncreaseDecreaseInAssetRetirementObligations`	$-3.17M	USD	Annual
Asset retirement obligations	`IncreaseDecreaseInAssetRetirementObligations`	$-2.57M	USD	Annual
Asset retirement obligations	`IncreaseDecreaseInAssetRetirementObligations`	$-111.62M	USD	Annual
Other non-current liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-16.52M	USD	Annual
Other non-current liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-33.56M	USD	Annual
Other non-current liabilities	`IncreaseDecreaseInOtherNoncurrentLiabilities`	$-19.89M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$314.26M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$131.88M	USD	Annual
Net cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$158.38M	USD	Annual
Capital expenditures	`PaymentstoAcquireProductiveAssetsIncludingDiscontinuedOperations`	$81.88M	USD	Annual
Capital expenditures	`PaymentstoAcquireProductiveAssetsIncludingDiscontinuedOperations`	$192.41M	USD	Annual
Capital expenditures	`PaymentstoAcquireProductiveAssetsIncludingDiscontinuedOperations`	$83.12M	USD	Annual
Payments on disposal of assets	`PaymentsForDispositionOfAssets`	-	USD	Annual
Payments on disposal of assets	`PaymentsForDispositionOfAssets`	$10.25M	USD	Annual
Payments on disposal of assets	`PaymentsForDispositionOfAssets`	-	USD	Annual
Proceeds on disposal of assets	`ProceedsFromSaleOfProductiveAssets`	$2.58M	USD	Annual
Proceeds on disposal of assets	`ProceedsFromSaleOfProductiveAssets`	$2.78M	USD	Annual
Proceeds on disposal of assets	`ProceedsFromSaleOfProductiveAssets`	$997.00K	USD	Annual
Capital contributions to equity affiliates	`PaymentsToAcquireEquityMethodInvestmentsCapitalContributions`	$10.05M	USD	Annual
Capital contributions to equity affiliates	`PaymentsToAcquireEquityMethodInvestmentsCapitalContributions`	$5.69M	USD	Annual
Capital contributions to equity affiliates	`PaymentsToAcquireEquityMethodInvestmentsCapitalContributions`	$5.25M	USD	Annual
Cash, cash equivalents and restricted cash acquired in acquisition, net of amounts paid	`CashAcquiredInExcessOfPaymentsToAcquireBusiness`	-	USD	Annual
Cash, cash equivalents and restricted cash acquired in acquisition, net of amounts paid	`CashAcquiredInExcessOfPaymentsToAcquireBusiness`	$198.51M	USD	Annual
Cash, cash equivalents and restricted cash acquired in acquisition, net of amounts paid	`CashAcquiredInExcessOfPaymentsToAcquireBusiness`	-	USD	Annual
Purchase of additional ownership interest in equity affiliate	`PaymentsToAcquireEquityMethodInvestmentsPurchaseOfAdditionalInterest`	-	USD	Annual
Purchase of additional ownership interest in equity affiliate	`PaymentsToAcquireEquityMethodInvestmentsPurchaseOfAdditionalInterest`	$13.29M	USD	Annual
Purchase of additional ownership interest in equity affiliate	`PaymentsToAcquireEquityMethodInvestmentsPurchaseOfAdditionalInterest`	-	USD	Annual
Cash paid on sale of Powder River Basin	`CashDivestedFromDeconsolidation`	$21.38M	USD	Annual
Cash paid on sale of Powder River Basin	`CashDivestedFromDeconsolidation`	-	USD	Annual
Cash paid on sale of Powder River Basin	`CashDivestedFromDeconsolidation`	-	USD	Annual
Purchase of investment securities	`PaymentsToAcquireInvestments`	$406.00K	USD	Annual
Purchase of investment securities	`PaymentsToAcquireInvestments`	$3.28M	USD	Annual
Purchase of investment securities	`PaymentsToAcquireInvestments`	$92.86M	USD	Annual
Maturity of investment securities	`ProceedsFromSaleMaturityAndCollectionsOfInvestments`	$3.36M	USD	Annual
Maturity of investment securities	`ProceedsFromSaleMaturityAndCollectionsOfInvestments`	-	USD	Annual
Maturity of investment securities	`ProceedsFromSaleMaturityAndCollectionsOfInvestments`	$100.25M	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	$3.00K	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	$-535.00K	USD	Annual
Other, net	`PaymentsForProceedsFromOtherInvestingActivities`	-	USD	Annual
Net cash (used in) provided by investing activities	`NetCashProvidedByUsedInInvestingActivities`	$102.20M	USD	Annual
Net cash (used in) provided by investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-121.31M	USD	Annual
Net cash (used in) provided by investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-191.75M	USD	Annual
Proceeds from borrowings on debt	`ProceedsFromIssuanceOfLongTermDebt`	$544.95M	USD	Annual
Proceeds from borrowings on debt	`ProceedsFromIssuanceOfLongTermDebt`	$396.00M	USD	Annual
Proceeds from borrowings on debt	`ProceedsFromIssuanceOfLongTermDebt`	$537.75M	USD	Annual
Principal repayments of debt	`RepaymentsOfLongTermDebt`	$471.70M	USD	Annual
Principal repayments of debt	`RepaymentsOfLongTermDebt`	$552.81M	USD	Annual
Principal repayments of debt	`RepaymentsOfLongTermDebt`	$369.50M	USD	Annual
Principal repayments of financing lease obligations	`FinanceLeasePrincipalPayments`	$3.65M	USD	Annual
Principal repayments of financing lease obligations	`RepaymentsOfLongTermCapitalLeaseObligations`	$1.01M	USD	Annual
Principal repayments of financing lease obligations	`RepaymentsOfLongTermCapitalLeaseObligations`	$533.00K	USD	Annual
Form S-4 costs	`PaymentsOfStockIssuanceCosts`	$3.92M	USD	Annual
Form S-4 costs	`PaymentsOfStockIssuanceCosts`	-	USD	Annual
Form S-4 costs	`PaymentsOfStockIssuanceCosts`	-	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$14.93M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$14.38M	USD	Annual
Debt issuance costs	`PaymentsOfDebtIssuanceCosts`	$6.69M	USD	Annual
Debt extinguishment costs	`PaymentsOfDebtExtinguishmentCosts`	$25.04M	USD	Annual
Debt extinguishment costs	`PaymentsOfDebtExtinguishmentCosts`	-	USD	Annual
Debt extinguishment costs	`PaymentsOfDebtExtinguishmentCosts`	-	USD	Annual
Debt amendment costs	`PaymentsOfDebtRestructuringCosts`	$4.52M	USD	Annual
Debt amendment costs	`PaymentsOfDebtRestructuringCosts`	-	USD	Annual
Debt amendment costs	`PaymentsOfDebtRestructuringCosts`	-	USD	Annual
Common stock repurchases and related expenses	`PaymentsForRepurchaseOfCommonStock`	$37.62M	USD	Annual
Common stock repurchases and related expenses	`PaymentsForRepurchaseOfCommonStock`	$20.27M	USD	Annual
Common stock repurchases and related expenses	`PaymentsForRepurchaseOfCommonStock`	$49.93M	USD	Annual
Special dividend paid	`PaymentsOfDividends`	-	USD	Annual
Special dividend paid	`PaymentsOfDividends`	$100.73M	USD	Annual
Special dividend paid	`PaymentsOfDividends`	-	USD	Annual
Principal repayments of notes payable	`RepaymentsOfNotesPayable`	$3.84M	USD	Annual
Principal repayments of notes payable	`RepaymentsOfNotesPayable`	$1.52M	USD	Annual
Principal repayments of notes payable	`RepaymentsOfNotesPayable`	$14.82M	USD	Annual
Other, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$352.00K	USD	Annual
Other, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$952.00K	USD	Annual
Other, net	`ProceedsFromPaymentsForOtherFinancingActivities`	$159.00K	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$22.71M	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-69.69M	USD	Annual
Net cash (used in) provided by financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-170.28M	USD	Annual
Net (decrease) increase in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$22.67M	USD	Annual
Net (decrease) increase in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$283.29M	USD	Annual
Net (decrease) increase in cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-129.57M	USD	Annual
Cash and cash equivalents and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$171.29M	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$193.96M	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$477.25M	USD	Point-in-time
Cash and cash equivalents and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$347.68M	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$171.29M	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$193.96M	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$477.25M	USD	Point-in-time
Cash and cash equivalents and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$347.68M	USD	Point-in-time
Cash paid for interest	`InterestPaidNet`	$40.63M	USD	Annual
Cash paid for interest	`InterestPaidNet`	$27.34M	USD	Annual
Cash paid for interest	`InterestPaidNet`	$51.88M	USD	Annual
Cash paid for income taxes	`IncomeTaxesPaid`	$13.33M	USD	Annual
Cash paid for income taxes	`IncomeTaxesPaid`	$3.04M	USD	Annual
Cash paid for income taxes	`IncomeTaxesPaid`	$37.00K	USD	Annual
Cash received for income tax refunds	`ProceedsFromIncomeTaxRefunds`	-	USD	Annual
Cash received for income tax refunds	`ProceedsFromIncomeTaxRefunds`	$14.16M	USD	Annual
Cash received for income tax refunds	`ProceedsFromIncomeTaxRefunds`	$72.24M	USD	Annual
Financing leases and capital financing - equipment	`CapitalLeaseObligationsIncurred`	$5.32M	USD	Annual
Financing leases and capital financing - equipment	`CapitalLeaseObligationsIncurred`	$1.57M	USD	Annual
Financing leases and capital financing - equipment	`CapitalLeaseObligationsIncurred`	$6.51M	USD	Annual
Accrued capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$4.11M	USD	Annual
Accrued capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$6.88M	USD	Annual
Accrued capital expenditures	`CapitalExpendituresIncurredButNotYetPaid`	$9.41M	USD	Annual
Issuance of equity in connection with acquisition	`NoncashorPartNoncashAcquisitionNoncashFinancialorEquityInstrumentConsiderationEquityIssuedValue`	$664.46M	USD	Annual
Issuance of equity in connection with acquisition	`NoncashorPartNoncashAcquisitionNoncashFinancialorEquityInstrumentConsiderationEquityIssuedValue`	-	USD	Annual
Issuance of equity in connection with acquisition	`NoncashorPartNoncashAcquisitionNoncashFinancialorEquityInstrumentConsiderationEquityIssuedValue`	-	USD	Annual
Net balance due to Alpha deemed effectively settled	`NoncashorPartNoncashAcquisitionNetPayableSettled`	-	USD	Annual
Net balance due to Alpha deemed effectively settled	`NoncashorPartNoncashAcquisitionNetPayableSettled`	$47.05M	USD	Annual
Net balance due to Alpha deemed effectively settled	`NoncashorPartNoncashAcquisitionNetPayableSettled`	-	USD	Annual
Total cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$171.29M	USD	Point-in-time
Total cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$193.96M	USD	Point-in-time
Total cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$477.25M	USD	Point-in-time
Total cash and cash equivalents and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$347.68M	USD	Point-in-time

Stockholders Equity 38 line items

Line Item	Tag	Value	Unit	Period
Beginning balance	`StockholdersEquity`	$1.07B	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$37.22M	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$92.65M	USD	Point-in-time
Beginning balance	`StockholdersEquity`	$696.12M	USD	Point-in-time
Retrospective warrants adjustment	`CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption`	$35.14M	USD	Point-in-time
Net (loss) income	`NetIncomeLoss`	$56.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-140.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$11.89M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-316.32M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$154.52M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$-113.66M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$6.82M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-68.53M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$299.17M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$73.79M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$156.54M	USD	1 Quarter
Other comprehensive loss, net	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-21.18M	USD	Annual
Other comprehensive loss, net	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-35.49M	USD	Annual
Other comprehensive loss, net	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-4.04M	USD	Annual
Stock-based compensation and net issuance of common stock for share vesting	`StockIssuedDuringPeriodValueSharebasedCompensationIncludingAdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriod`	$20.21M	USD	Annual
Stock-based compensation and net issuance of common stock for share vesting	`StockIssuedDuringPeriodValueSharebasedCompensationIncludingAdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriod`	$13.46M	USD	Annual
Stock-based compensation and net issuance of common stock for share vesting	`StockIssuedDuringPeriodValueSharebasedCompensationIncludingAdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriod`	$13.03M	USD	Annual
Special dividend	`DividendsCommonStockCash`	$100.73M	USD	Annual
Exercise of stock options	`StockIssuedDuringPeriodValueStockOptionsExercised`	$934.00K	USD	Annual
Exercise of stock options	`StockIssuedDuringPeriodValueStockOptionsExercised`	$146.00K	USD	Annual
Common stock repurchase and related expenses	`TreasuryStockValueAcquiredCostMethod`	$37.62M	USD	Annual
Common stock repurchase and related expenses	`TreasuryStockValueAcquiredCostMethod`	$50.04M	USD	Annual
Common stock repurchase and related expenses	`TreasuryStockValueAcquiredCostMethod`	$20.27M	USD	Annual
Warrant exercises	`StockIssuedDuringPeriodValueWarrantsExercised`	$8.00K	USD	Annual
Warrant exercises	`StockIssuedDuringPeriodValueWarrantsExercised`	$362.00K	USD	Annual
Warrant exercises	`StockIssuedDuringPeriodValueWarrantsExercised`	$19.00K	USD	Annual
Form S-4 costs	`AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts`	$3.92M	USD	Annual
Equity consideration for the Alpha Merger	`StockIssuedDuringPeriodValueAcquisitions`	$664.46M	USD	Annual
Net balances due to Alpha deemed effectively settled	`AdjustmentstoAdditionalPaidinCapitalNetPayableSettledDuringAcquisitions`	$47.05M	USD	Annual
Ending balance	`StockholdersEquity`	$1.07B	USD	Point-in-time
Ending balance	`StockholdersEquity`	$37.22M	USD	Point-in-time
Ending balance	`StockholdersEquity`	$92.65M	USD	Point-in-time
Ending balance	`StockholdersEquity`	$696.12M	USD	Point-in-time

Comprehensive Income 35 line items

Line Item	Tag	Value	Unit	Period
Net (loss) income	`NetIncomeLoss`	$56.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-140.94M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$11.89M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-316.32M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$154.52M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$-113.66M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$6.82M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$-68.53M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$299.17M	USD	Annual
Net (loss) income	`NetIncomeLoss`	$73.79M	USD	1 Quarter
Net (loss) income	`NetIncomeLoss`	$156.54M	USD	1 Quarter
Current period actuarial loss	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$-22.89M	USD	Annual
Current period actuarial loss	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$-42.89M	USD	Annual
Current period actuarial loss	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax`	$-3.83M	USD	Annual
Income tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	Annual
Income tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	$-1.57M	USD	Annual
Income tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax`	-	USD	Annual
Current period actuarial (loss) gain, net of income tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-42.89M	USD	Annual
Current period actuarial (loss) gain, net of income tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-21.32M	USD	Annual
Current period actuarial (loss) gain, net of income tax	`OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax`	$-3.83M	USD	Annual
Less: reclassification adjustments for amounts reclassified to earnings due to amortization of net actuarial loss (gain) and settlements	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax`	$203.00K	USD	Annual
Less: reclassification adjustments for amounts reclassified to earnings due to amortization of net actuarial loss (gain) and settlements	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax`	$-7.41M	USD	Annual
Less: reclassification adjustments for amounts reclassified to earnings due to amortization of net actuarial loss (gain) and settlements	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax`	$-155.00K	USD	Annual
Income tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	$-14.00K	USD	Annual
Income tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	Annual
Income tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax`	-	USD	Annual
Less: reclamation adjustments for amounts reclassified to earnings due to amortization of net actuarial (gain) loss and settlements, net of income tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-7.41M	USD	Annual
Less: reclamation adjustments for amounts reclassified to earnings due to amortization of net actuarial (gain) loss and settlements, net of income tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$-141.00K	USD	Annual
Less: reclamation adjustments for amounts reclassified to earnings due to amortization of net actuarial (gain) loss and settlements, net of income tax	`OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax`	$203.00K	USD	Annual
Total other comprehensive loss, net of tax	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-21.18M	USD	Annual
Total other comprehensive loss, net of tax	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-35.49M	USD	Annual
Total other comprehensive loss, net of tax	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-4.04M	USD	Annual
Total comprehensive (loss) income	`ComprehensiveIncomeNetOfTax`	$277.98M	USD	Annual
Total comprehensive (loss) income	`ComprehensiveIncomeNetOfTax`	$-351.81M	USD	Annual
Total comprehensive (loss) income	`ComprehensiveIncomeNetOfTax`	$150.49M	USD	Annual

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