$AMR
Alpha Metallurgical Resources, Inc. Stock $amr

$amr Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000170471524000028 Filed on February 26, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$864.1M	$960.0M	$3.471B
YoY Change	-5.18%	16.58%	-15.36%
Cost Of Revenue	$648.3M	$668.9M	$2.356B
YoY Change	20.25%	21.78%	3.07%
Gross Profit	$215.8M	$291.1M	$1.115B
YoY Change	-42.02%	6.17%	-38.57%
Gross Profit Margin	24.97%	30.32%	32.13%
Selling, General & Admin	$22.38M	$26.14M	$82.39M
YoY Change	8.14%	12.29%	15.04%
% of Gross Profit	10.37%	8.98%	7.39%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$40.70M	$44.70M	$136.9M
YoY Change	38.33%	63.21%	7.67%
% of Gross Profit	18.86%	15.36%	12.27%
Operating Expenses	$22.38M	$77.79M	$82.39M
YoY Change	8.14%	30.95%	15.04%
Operating Profit	$141.9M	$213.3M	$863.1M
YoY Change	-54.89%	-0.68%	-45.4%
Interest Expense	$1.086M	-$5.260M	$6.923M
YoY Change	-36.86%	-13.19%	-68.25%
% of Operating Profit	0.77%	-2.47%	0.8%
Other Income/Expense, Net	-$718.0K	-$763.0K	-$17.63M
YoY Change	-45.56%	-139.17%	-32.54%
Pretax Income	$141.2M	$204.5M	$845.5M
YoY Change	-54.93%	-3.7%	-45.62%
Income Tax	$14.17M	$28.53M	$123.5M
% Of Pretax Income	10.03%	13.95%	14.61%
Net Earnings	$127.0M	$176.0M	$722.0M
YoY Change	-53.1%	-20.24%	-50.16%
Net Earnings / Revenue	14.7%	18.34%	20.8%
Basic Earnings Per Share	$9.77		$51.18
Diluted Earnings Per Share	$9.59	$12.89	$49.30
COMMON SHARES
Basic Shares Outstanding	12.99M shares	13.28M shares	14.11M shares
Diluted Shares Outstanding	13.24M shares		14.64M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments	$269.4M	$268.2M	$268.2M
YoY Change	21.07%	-22.91%	-22.91%
Cash & Equivalents	$269.4M	$268.2M	$268.2M
Short-Term Investments		$32.00K	$32.00K
Other Short-Term Assets	$34.87M	$39.03M	$39.03M
YoY Change	-38.88%	-75.4%	-75.4%
Inventory	$246.0M	$231.3M	$231.3M
Prepaid Expenses
Receivables	$526.2M	$509.7M	$509.7M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.077B	$1.048B	$1.048B
YoY Change	-1.46%	-5.93%	-5.93%
LONG-TERM ASSETS
Property, Plant & Equipment	$1.058B	$1.044B	$1.044B
YoY Change	11.92%	16.25%	16.25%
Goodwill		$11.12M
YoY Change		3.61%
Intangibles	$44.90M	$46.58M
YoY Change	-15.12%	-15.47%
Long-Term Investments		$31.67M	$31.67M
YoY Change		37.28%	37.28%
Other Assets	$113.6M	$106.5M	$224.2M
YoY Change	6.21%	3.19%	6.28%
Total Long-Term Assets	$1.384B	$1.358B	$1.358B
YoY Change	10.16%	13.33%	13.33%
TOTAL ASSETS
Total Short-Term Assets	$1.077B	$1.048B	$1.048B
Total Long-Term Assets	$1.384B	$1.358B	$1.358B
Total Assets	$2.461B	$2.406B	$2.406B
YoY Change	4.75%	4.05%	4.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$151.5M	$128.8M	$128.8M
YoY Change	23.4%	21.5%	21.5%
Accrued Expenses	$124.2M	$113.0M	$113.6M
YoY Change	12.22%	-0.76%	-1.18%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$3.392M	$3.582M	$3.582M
YoY Change	-4.77%	16.37%	16.37%
Total Short-Term Liabilities	$341.3M	$309.9M	$309.9M
YoY Change	7.8%	-23.02%	-23.02%
LONG-TERM LIABILITIES
Long-Term Debt	$6.034M	$6.792M	$6.792M
YoY Change	-27.99%	-13.99%	-13.99%
Other Long-Term Liabilities	$20.54M	$18.62M	$476.3M
YoY Change	10.92%	-7.8%	3.24%
Total Long-Term Liabilities	$20.54M	$18.62M	$483.1M
YoY Change	10.92%	-7.8%	2.95%
TOTAL LIABILITIES
Total Short-Term Liabilities	$341.3M	$309.9M	$309.9M
Total Long-Term Liabilities	$20.54M	$18.62M	$483.1M
Total Liabilities	$869.7M	$832.1M	$832.1M
YoY Change	8.63%	-5.73%	-5.73%
SHAREHOLDERS EQUITY
Retained Earnings	$2.096B	$1.970B
YoY Change	36.16%	54.43%
Common Stock	$224.0K	$221.0K
YoY Change	2.75%	1.84%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.591B	$1.574B	$1.574B
YoY Change
Total Liabilities & Shareholders Equity	$2.461B	$2.406B	$2.406B
YoY Change	4.75%	4.05%	4.05%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$127.0M	$176.0M	$722.0M
YoY Change	-53.1%	-20.24%	-50.16%
Depreciation, Depletion And Amortization	$40.70M	$44.70M	$136.9M
YoY Change	38.33%	63.21%	7.67%
Cash From Operating Activities	$196.1M	$199.4M	$851.2M
YoY Change	10.53%	7.78%	-42.64%
INVESTING ACTIVITIES
Capital Expenditures	$63.62M	$61.54M	$245.4M
YoY Change	-14.32%	0.95%	49.34%
Acquisitions
YoY Change
Other Investing Activities	-$6.000K	$22.17M	-$35.00K
YoY Change	-50.0%	-125.83%	-100.83%
Cash From Investing Activities	-$68.86M	-$39.36M	-$166.0M
YoY Change	146.89%	-73.18%	-49.6%
FINANCING ACTIVITIES
Cash Dividend Paid	$3.000M		$113.0M
YoY Change	-96.51%		745.91%
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net	$632.0K		$2.314M
YoY Change	44.29%		-99.49%
Cash From Financing Activities	-$120.0M	-154.9M	-$656.4M
YoY Change	-48.14%	12.48%	-33.14%
NET CHANGE
Cash From Operating Activities	$196.1M	199.4M	$851.2M
Cash From Investing Activities	-$68.86M	-39.36M	-$166.0M
Cash From Financing Activities	-$120.0M	-154.9M	-$656.4M
Net Change In Cash	$7.188M	5.062M	$28.73M
YoY Change	-108.77%	-105.08%	-83.37%
FREE CASH FLOW
Cash From Operating Activities	$196.1M	$199.4M	$851.2M
Capital Expenditures	$63.62M	$61.54M	$245.4M
Free Cash Flow	$132.5M	$137.8M	$605.8M
YoY Change	28.42%	11.13%	-54.1%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	863085000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	1580879000	usd
CY2023	us-gaap	Interest Expense InterestExpense	6923000	usd
CY2022	us-gaap	Interest Expense InterestExpense	21802000	usd
CY2021	us-gaap	Interest Expense InterestExpense	69654000	usd
CY2023	us-gaap	Investment Income Interest InvestmentIncomeInterest	11933000	usd
CY2022	us-gaap	Investment Income Interest InvestmentIncomeInterest	3187000	usd
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	336000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-18263000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-14346000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1620000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6832000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6465000	usd
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-17626000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-26129000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-67002000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	1554750000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	292198000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3408000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	342272000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	301906000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	46052000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	239000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	407210000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	200574000	usd
CY2022Q4	us-gaap	Deposits Assets Current DepositsAssetsCurrent	84748000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	24547000	usd
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	49384000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	1114421000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	491186000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	442645000	usd
CY2022Q4	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	77333000	usd
CY2022Q4	us-gaap	Mineral Rights MineralRights	451062000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	53719000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	55102000	usd
CY2022Q4	us-gaap	Restricted Investments Noncurrent RestrictedInvestmentsNoncurrent	105735000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	28941000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	11378000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	103195000	usd
CY2022Q4	us-gaap	Assets Assets	2312479000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3078000	usd
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CY2022Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	28254000	usd
CY2022Q4	amr	Accrued Liabilities And Other Liabilities Current AccruedLiabilitiesAndOtherLiabilitiesCurrent	265256000	usd
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CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7897000	usd
CY2022Q4	amr	Liability Defined Benefit Plan Postretirement Black Lung Health Coverage And Workers Compensation Noncurrent LiabilityDefinedBenefitPlanPostretirementBlackLungHealthCoverageAndWorkersCompensationNoncurrent	188247000	usd
CY2022Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	110836000	usd
CY2022Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	142048000	usd
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2023Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	217000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	815442000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-12162000	usd
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	6150487	shares
CY2021	us-gaap	Net Income Loss NetIncomeLoss	288790000	usd
CY2023	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	136869000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8523000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	10874000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	20197000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	882724000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	649061000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1275319000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1429755000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2312479000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
CY2022	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	107620000	usd
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001704715
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-38735
CY2023	dei	Entity Registrant Name EntityRegistrantName	ALPHA METALLURGICAL RESOURCES, INC.
CY2023	dei	Entity Registrant Name EntityRegistrantName	ALPHA METALLURGICAL RESOURCES, INC.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	81-3015061
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	340 Martin Luther King Jr. Blvd.
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	Bristol
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	TN
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	37620
CY2023	dei	City Area Code CityAreaCode	423
CY2023	dei	Local Phone Number LocalPhoneNumber	573-0300
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	1300000000	usd
CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	12994558	shares
CY2023	dei	Auditor Firm AuditorFirmId	49
CY2023	dei	Auditor Name AuditorName	RSM US LLP
CY2023	dei	Auditor Location AuditorLocation	Atlanta, Georgia
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3456630000	usd
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CY2021	us-gaap	Other Income OtherIncome	6062000	usd
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CY2022	us-gaap	Revenues Revenues	4101592000	usd
CY2021	us-gaap	Revenues Revenues	2258686000	usd
CY2023	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	2356138000	usd
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CY2023	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	136869000	usd
CY2022	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	107620000	usd
CY2021	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	110047000	usd
CY2023	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	25500000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	23765000	usd
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	26520000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	8523000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19498000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13244000	usd
CY2023	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	0	usd
CY2022	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	0	usd
CY2021	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	-561000	usd
CY2023	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	82390000	usd
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	71618000	usd
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	63901000	usd
CY2023	amr	Acquisition Related Obligations Changes In Fair Value Gain Loss AcquisitionRelatedObligationsChangesInFairValueGainLoss	0	usd
CY2022	amr	Acquisition Related Obligations Changes In Fair Value Gain Loss AcquisitionRelatedObligationsChangesInFairValueGainLoss	-8880000	usd
CY2021	amr	Acquisition Related Obligations Changes In Fair Value Gain Loss AcquisitionRelatedObligationsChangesInFairValueGainLoss	-19525000	usd
CY2023	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	1088000	usd
CY2022	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-3363000	usd
CY2021	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	10972000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	2520713000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	1899486000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	359200000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2753000	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-4149000	usd
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	49.30
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	14106466	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17490886	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	14642856	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18222397	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18871682	shares
CY2023	us-gaap	Net Income Loss NetIncomeLoss	721956000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	288790000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-34205000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	56485000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	47461000	usd
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	-7588000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	12888000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-26617000	usd
CY2022	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	43597000	usd
CY2021	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	47461000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	2324000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-3555000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-6021000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	516000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	-811000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	1808000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-2744000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-6021000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-28425000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	46341000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	53482000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	693531000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1494886000	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	268207000	usd
CY2023Q4	us-gaap	Short Term Investments ShortTermInvestments	0	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	234000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	509682000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	231344000	usd
CY2023Q4	us-gaap	Deposits Assets Current DepositsAssetsCurrent	32000	usd
CY2023Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	0	usd
CY2023Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	39032000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	1048297000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	558905000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	588992000	usd
CY2023Q4	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	99826000	usd
CY2023Q4	us-gaap	Mineral Rights MineralRights	451160000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	38543000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	46579000	usd
CY2023Q4	us-gaap	Restricted Investments Noncurrent RestrictedInvestmentsNoncurrent	40597000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	115918000	usd
CY2023Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	8028000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	106486000	usd
CY2023Q4	us-gaap	Assets Assets	2406057000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3582000	usd
CY2023Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	128836000	usd
CY2023Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	0	usd
CY2023Q4	amr	Accrued Liabilities And Other Liabilities Current AccruedLiabilitiesAndOtherLiabilitiesCurrent	177512000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	309930000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6792000	usd
CY2023Q4	amr	Liability Defined Benefit Plan Postretirement Black Lung Health Coverage And Workers Compensation Noncurrent LiabilityDefinedBenefitPlanPostretirementBlackLungHealthCoverageAndWorkersCompensationNoncurrent	189226000	usd
CY2023Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	101908000	usd
CY2023Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	166509000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	39142000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	18622000	usd
CY2023Q4	us-gaap	Liabilities Liabilities	832129000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2023Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2023Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2023Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000	shares
CY2023Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	22058135	shares
CY2023Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	12938679	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	21703163	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15552676	shares
CY2023Q4	us-gaap	Common Stock Value CommonStockValue	221000	usd
CY2023Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	834482000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-40587000	usd
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	9119456	shares
CY2023Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	1189715000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1969527000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1573928000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2406057000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	721956000	usd
CY2021	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	110047000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19498000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13244000	usd
CY2023	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1947000	usd
CY2022	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	8282000	usd
CY2021	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	12338000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2753000	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2023	amr	Acquisition Related Obligations Changes In Fair Value Gain Loss AcquisitionRelatedObligationsChangesInFairValueGainLoss	0	usd
CY2022	amr	Acquisition Related Obligations Changes In Fair Value Gain Loss AcquisitionRelatedObligationsChangesInFairValueGainLoss	-8880000	usd
CY2021	amr	Acquisition Related Obligations Changes In Fair Value Gain Loss AcquisitionRelatedObligationsChangesInFairValueGainLoss	-19525000	usd
CY2023	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	6817000	usd
CY2022	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-43000	usd
CY2021	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	9911000	usd
CY2023	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	25500000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	23765000	usd
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	26520000	usd
CY2023	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	8376000	usd
CY2022	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	-4492000	usd
CY2021	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	-1751000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	39722000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-14521000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-163000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	19017000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	7484000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	5315000	usd
CY2023	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-18263000	usd
CY2022	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-14346000	usd
CY2021	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-4149000	usd
CY2023	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-363000	usd
CY2022	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-761000	usd
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-5873000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	102477000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-82774000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	336240000	usd
CY2023	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	27900000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	63169000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	21331000	usd
CY2023	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-7596000	usd
CY2022	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	12031000	usd
CY2021	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-61581000	usd
CY2023	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-80729000	usd
CY2022	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	84314000	usd
CY2021	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-26853000	usd
CY2023	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-3837000	usd
CY2022	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-11268000	usd
CY2021	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	250000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	15666000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3721000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	25154000	usd
CY2023	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-9087000	usd
CY2022	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-6872000	usd
CY2021	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	15961000	usd
CY2023	amr	Increase Decreasein Acquisition Related Obligations IncreaseDecreaseinAcquisitionRelatedObligations	28254000	usd
CY2022	amr	Increase Decreasein Acquisition Related Obligations IncreaseDecreaseinAcquisitionRelatedObligations	22264000	usd
CY2021	amr	Increase Decreasein Acquisition Related Obligations IncreaseDecreaseinAcquisitionRelatedObligations	18121000	usd
CY2023	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-19189000	usd
CY2022	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-18699000	usd
CY2021	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-16306000	usd
CY2023	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-45508000	usd
CY2022	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-25098000	usd
CY2021	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-24588000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	851159000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	1484005000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	174943000	usd
CY2023	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	245373000	usd
CY2022	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	164309000	usd
CY2021	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	83300000	usd
CY2023	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	8173000	usd
CY2022	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	3623000	usd
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	8224000	usd
CY2023	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	11919000	usd
CY2022	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	24878000	usd
CY2021	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2023	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	207065000	usd
CY2022	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	269420000	usd
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	17985000	usd
CY2023	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	320961000	usd
CY2022	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	149397000	usd
CY2021	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	13265000	usd
CY2023	amr	Payments To Acquire Equity Method Investments Capital Contributions PaymentsToAcquireEquityMethodInvestmentsCapitalContributions	30812000	usd
CY2022	amr	Payments To Acquire Equity Method Investments Capital Contributions PaymentsToAcquireEquityMethodInvestmentsCapitalContributions	19556000	usd
CY2021	amr	Payments To Acquire Equity Method Investments Capital Contributions PaymentsToAcquireEquityMethodInvestmentsCapitalContributions	6677000	usd
CY2023	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-35000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4214000	usd
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3382000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-166000000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-329357000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-89855000	usd
CY2023	amr	Repurchases Of Long Term Debt RepurchasesOfLongTermDebt	0	usd
CY2022	amr	Repurchases Of Long Term Debt RepurchasesOfLongTermDebt	0	usd
CY2021	amr	Repurchases Of Long Term Debt RepurchasesOfLongTermDebt	18415000	usd
CY2023	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2314000	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	450622000	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	119097000	usd
CY2023	us-gaap	Payments Of Dividends PaymentsOfDividends	113013000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	13360000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	0	usd
CY2023	amr	Payments For Repurchase Of Common Stock And Related Expenses PaymentsForRepurchaseOfCommonStockAndRelatedExpenses	540071000	usd
CY2022	amr	Payments For Repurchase Of Common Stock And Related Expenses PaymentsForRepurchaseOfCommonStockAndRelatedExpenses	521803000	usd
CY2021	amr	Payments For Repurchase Of Common Stock And Related Expenses PaymentsForRepurchaseOfCommonStockAndRelatedExpenses	786000	usd
CY2023	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	4322000	usd
CY2022	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	5643000	usd
CY2021	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	usd
CY2023	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5352000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1726000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-8747000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-656428000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-981868000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-147045000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	28731000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	172780000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-61957000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	355394000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182614000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	244571000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	384125000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	355394000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182614000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	5207000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	25895000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	63061000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	79221000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	139663000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	176000	usd
CY2023	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	30000	usd
CY2022	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	6000	usd
CY2021	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	64498000	usd
CY2023	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	3195000	usd
CY2022	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	9833000	usd
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	787000	usd
CY2023	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	25004000	usd
CY2022	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	18456000	usd
CY2021	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	9964000	usd
CY2023	amr	Accrued Common Stock Repurchases AccruedCommonStockRepurchases	8118000	usd
CY2022	amr	Accrued Common Stock Repurchases AccruedCommonStockRepurchases	3016000	usd
CY2021	amr	Accrued Common Stock Repurchases AccruedCommonStockRepurchases	0	usd
CY2023Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	2863000	usd
CY2022Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	88128000	usd
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	0	usd
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	268207000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	301906000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	81211000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	0	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	24547000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	11977000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	115918000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	28941000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	89426000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	384125000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	355394000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182614000	usd
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	200102000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	288790000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	53482000	usd
CY2021	amr	Share Based Compensation Issuance Of Stock For Share Vesting And Stock Reissuance ShareBasedCompensationIssuanceOfStockForShareVestingAndStockReissuance	5315000	usd
CY2021	amr	Treasury Stock Value Acquired Cost Method And Related Expenses TreasuryStockValueAcquiredCostMethodAndRelatedExpenses	786000	usd
CY2021	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	6000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	546909000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	46341000	usd
CY2022	amr	Share Based Compensation Issuance Of Stock For Share Vesting And Stock Reissuance ShareBasedCompensationIssuanceOfStockForShareVestingAndStockReissuance	7484000	usd
CY2022	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1172000	usd
CY2022	amr	Treasury Stock Value Acquired Cost Method And Related Expenses TreasuryStockValueAcquiredCostMethodAndRelatedExpenses	543328000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	24119000	usd
CY2022	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	6.185
CY2022	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	101487000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1429755000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	721956000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-28425000	usd
CY2023	amr	Share Based Compensation Issuance Of Stock For Share Vesting And Stock Reissuance ShareBasedCompensationIssuanceOfStockForShareVestingAndStockReissuance	19017000	usd
CY2023	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	225000	usd
CY2023	amr	Treasury Stock Value Acquired Cost Method And Related Expenses TreasuryStockValueAcquiredCostMethodAndRelatedExpenses	547542000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Warrant Issued AdjustmentsToAdditionalPaidInCapitalWarrantIssued	6690000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.940
CY2023	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	27748000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	1573928000	usd
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Use of Estimates</span></div><div><span><br/></span></div><div style="text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of the Company’s Consolidated Financial Statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the Consolidated Financial Statements and the reported amounts of revenues and expenses during the reporting period. Significant items subject to such estimates and assumptions include inventories; mineral reserves and resources; long-lived asset impairments; reclamation obligations; post-employment and other employee benefit obligations; useful lives, depletion and amortization; reserves for workers’ compensation and black lung claims; deferred income taxes; income taxes payable; income taxes refundable and receivable; reserves for contingencies and litigation; and fair value of financial instruments. Estimates are based on facts and circumstances believed to be reasonable at the time; however, actual results could differ from those estimates.</span></div>
CY2022Q4	us-gaap	Inventory Net InventoryNet	200574000	usd
CY2023Q1	amr	Stock Repurchase Program Additional Authorized Repurchase Amount StockRepurchaseProgramAdditionalAuthorizedRepurchaseAmount	200000000	usd
CY2023Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1200000000	usd
CY2023Q4	us-gaap	Mineral Rights MineralRights	451160000	usd
CY2022Q4	us-gaap	Mineral Rights MineralRights	451062000	usd
CY2023Q4	amr	Asset Retirement Obligation Assets AssetRetirementObligationAssets	27473000	usd
CY2022Q4	amr	Asset Retirement Obligation Assets AssetRetirementObligationAssets	20284000	usd
CY2023	us-gaap	Depletion Depletion	23944000	usd
CY2022	us-gaap	Depletion Depletion	23078000	usd
CY2021	us-gaap	Depletion Depletion	23541000	usd
CY2023Q4	amr	Stock Repurchase Program Additional Authorized Amount StockRepurchaseProgramAdditionalAuthorizedAmount	300000000	usd
CY2023Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1500000	usd
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	6475271	shares
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1040128000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	6703000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	5892000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	5373000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	4790000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4790000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	19031000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	11124000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	10736000	usd
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1039934000	usd
	amr	Stock Repurchase Program Expenses StockRepurchaseProgramExpenses	194000	usd
CY2023Q4	amr	Stock Repurchase Program Excise Tax StockRepurchaseProgramExciseTax	4665000	usd
CY2022Q2	amr	Common Stock Dividends Per Share Intended But Not Yet Declared CommonStockDividendsPerShareIntendedButNotYetDeclared	0.375
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	5949000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	5429000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4038000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	442645000	usd
CY2023	amr	Depreciation And Amortization Property Plant And Equipment And Non Mineral Asset Retirement Obligation Assets DepreciationAndAmortizationPropertyPlantAndEquipmentAndNonMineralAssetRetirementObligationAssets	112925000	usd
CY2022	amr	Depreciation And Amortization Property Plant And Equipment And Non Mineral Asset Retirement Obligation Assets DepreciationAndAmortizationPropertyPlantAndEquipmentAndNonMineralAssetRetirementObligationAssets	84542000	usd
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2023	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	124612000	usd
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	usd
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	usd
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	usd
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	usd
CY2023Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	124612000	usd
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1240	shares
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	717992	shares
CY2021	amr	Depreciation And Amortization Property Plant And Equipment And Non Mineral Asset Retirement Obligation Assets DepreciationAndAmortizationPropertyPlantAndEquipmentAndNonMineralAssetRetirementObligationAssets	86506000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4488000	usd
CY2023Q4	amr	Lease Rightof Use Asset LeaseRightofUseAsset	9987000	usd
CY2022Q4	amr	Lease Rightof Use Asset LeaseRightofUseAsset	9917000	usd
CY2023Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1280000	usd
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1052000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	572000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	612000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	721956000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	288790000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	14106466	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17490886	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18441175	shares
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	51.18
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	82.82
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.66
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	14106466	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	17490886	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18441175	shares
CY2023	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	81352	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	275715	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	35574	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	14642856	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18222397	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18871682	shares
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	49.30
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	79.49
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	15.30
CY2023Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	52508000	usd
CY2022Q4	us-gaap	Inventory Raw Materials Net Of Reserves InventoryRawMaterialsNetOfReserves	57382000	usd
CY2023Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	120000000	usd
CY2022Q4	us-gaap	Inventory Finished Goods Net Of Reserves InventoryFinishedGoodsNetOfReserves	91474000	usd
CY2023Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	58836000	usd
CY2022Q4	us-gaap	Inventory Raw Materials And Supplies Net Of Reserves InventoryRawMaterialsAndSuppliesNetOfReserves	51718000	usd
CY2023Q4	us-gaap	Inventory Net InventoryNet	231344000	usd
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.44
CY2023Q2	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6602000	usd
CY2023Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2023Q3	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	7001000	usd
CY2023Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2023Q4	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6736000	usd
CY2023Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.50
CY2023Q4	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6510000	usd
CY2023	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.94
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	26849000	usd
CY2023	amr	Dividend Equivalent DividendEquivalent	899000	usd
CY2016Q3	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	810811	shares
CY2022Q4	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	45.086
CY2023Q1	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	44.972
CY2023Q2	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	44.820
CY2022Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight	1.20	shares
CY2023Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	0	shares
CY2023	amr	Stock Issued During Period Shares Exercise Of Warrants StockIssuedDuringPeriodSharesExerciseOfWarrants	169028	shares
CY2023	amr	Shares Withheld Upon Conversion Of Convertible Securities SharesWithheldUponConversionOfConvertibleSecurities	20139	shares
CY2023	amr	Shares Withheld Upon Conversion Of Convertible Securities Reclassified As Treasury Stock Value SharesWithheldUponConversionOfConvertibleSecuritiesReclassifiedAsTreasuryStockValue	2368000	usd
CY2022Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	190838	shares
CY2022Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	229006	shares
CY2022	amr	Stock Issued During Period Shares Exercise Of Warrants StockIssuedDuringPeriodSharesExerciseOfWarrants	702182	shares
CY2022	amr	Shares Withheld Upon Conversion Of Convertible Securities SharesWithheldUponConversionOfConvertibleSecurities	187857	shares
CY2022	amr	Shares Withheld Upon Conversion Of Convertible Securities Reclassified As Treasury Stock Value SharesWithheldUponConversionOfConvertibleSecuritiesReclassifiedAsTreasuryStockValue	18509000	usd
CY2021Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	801246	shares
CY2021Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	921433	shares
CY2021	amr	Stock Issued During Period Shares Exercise Of Warrants StockIssuedDuringPeriodSharesExerciseOfWarrants	143	shares
CY2021	amr	Shares Withheld Upon Conversion Of Convertible Securities SharesWithheldUponConversionOfConvertibleSecurities	17	shares
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	1147897000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	933831000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	558905000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	491186000	usd
CY2023Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	588992000	usd
CY2023Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	7493000	usd
CY2022Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	7476000	usd
CY2022Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	1363000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	31670000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	23070000	usd
CY2023Q4	amr	Insurance Receivablefor Workers Compensation Noncurrent InsuranceReceivableforWorkersCompensationNoncurrent	37951000	usd
CY2022Q4	amr	Insurance Receivablefor Workers Compensation Noncurrent InsuranceReceivableforWorkersCompensationNoncurrent	44734000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	11124000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	10736000	usd
CY2023Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	12898000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	15816000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	106486000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	103195000	usd
CY2023Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	3997000	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	3744000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	3466000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	3876000	usd
CY2023Q4	amr	Lease Liability LeaseLiability	9315000	usd
CY2022Q4	amr	Lease Liability LeaseLiability	9284000	usd
CY2023	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	1444000	usd
CY2022	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	2644000	usd
CY2021	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	2061000	usd
CY2023	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	651000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	315000	usd
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	245000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	1127000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	1113000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	1383000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1315000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1234000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	786000	usd
CY2023	us-gaap	Lease Cost LeaseCost	4537000	usd
CY2022	us-gaap	Lease Cost LeaseCost	5306000	usd
CY2021	us-gaap	Lease Cost LeaseCost	4475000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	0	usd
CY2021	us-gaap	Sublease Income SubleaseIncome	0	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	0	usd
CY2023	us-gaap	Sublease Income SubleaseIncome	0	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	0	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	0	usd
CY2023	amr	Lease Payments LeasePayments	4571000	usd
CY2022	amr	Lease Payments LeasePayments	5556000	usd
CY2021	amr	Lease Payments LeasePayments	4478000	usd
CY2023	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	651000	usd
CY2022	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	315000	usd
CY2021	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	245000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	2443000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	2347000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	2169000	usd
CY2023	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	1477000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	2894000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	2064000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	1891000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	4728000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	703000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	206000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	48000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	275000	usd
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P5Y1M6D
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P5Y10M24D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y9M
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P6Y3M18D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y1M6D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y10M17D
CY2023Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.123
CY2022Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.135
CY2021Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.096
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.114
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.116
CY2021Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.113
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1850000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1003000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1740000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	952000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1205000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	918000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	646000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	747000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	360000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	677000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	1387000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	1412000	usd
CY2023Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	7188000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	5709000	usd
CY2023Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	1911000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	1671000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	5277000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	4038000	usd
CY2023Q4	amr	Long Term Debt And Lease Obligation Maturity Year Three LongTermDebtAndLeaseObligationMaturityYearThree	1637000	usd
CY2023Q4	amr	Long Term Debt And Lease Obligation Maturity Year Four LongTermDebtAndLeaseObligationMaturityYearFour	451000	usd
CY2023Q4	amr	Long Term Debt And Lease Obligation Maturity Year Five LongTermDebtAndLeaseObligationMaturityYearFive	200000	usd
CY2023Q4	amr	Long Term Debt And Lease Obligation Maturity After Year Five LongTermDebtAndLeaseObligationMaturityAfterYearFive	1079000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	10374000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	62811000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	69458000	usd
CY2023Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	10482000	usd
CY2022Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	11651000	usd
CY2023Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	10687000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	9664000	usd
CY2023Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	31236000	usd
CY2022Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	24959000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	38915000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	36963000	usd
CY2023Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	2342000	usd
CY2022Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	86118000	usd
CY2023Q4	amr	Accrued Freight AccruedFreight	8461000	usd
CY2022Q4	amr	Accrued Freight AccruedFreight	7181000	usd
CY2023Q4	amr	Other Liabilities Miscellaneous Current OtherLiabilitiesMiscellaneousCurrent	12578000	usd
CY2022Q4	amr	Other Liabilities Miscellaneous Current OtherLiabilitiesMiscellaneousCurrent	19262000	usd
CY2023Q4	amr	Accrued Liabilities And Other Liabilities Current AccruedLiabilitiesAndOtherLiabilitiesCurrent	177512000	usd
CY2022Q4	amr	Accrued Liabilities And Other Liabilities Current AccruedLiabilitiesAndOtherLiabilitiesCurrent	265256000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	5097000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	6179000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	5277000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4796000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	10374000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	10975000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3582000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3078000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	6792000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7897000	usd
CY2023Q4	amr	Long Term Debt And Lease Obligation Maturity Year One LongTermDebtAndLeaseObligationMaturityYearOne	3582000	usd
CY2023Q4	amr	Long Term Debt And Lease Obligation Maturity Year Two LongTermDebtAndLeaseObligationMaturityYearTwo	3425000	usd
CY2023Q4	amr	Acquisition Related Obligations Carrying Amount AcquisitionRelatedObligationsCarryingAmount	0	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount AcquisitionRelatedObligationsCarryingAmount	28254000	usd
CY2023Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	0	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	28254000	usd
CY2023Q4	amr	Acquisition Related Obligations Carrying Amount Noncurrent AcquisitionRelatedObligationsCarryingAmountNoncurrent	0	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount Noncurrent AcquisitionRelatedObligationsCarryingAmountNoncurrent	0	usd
CY2021Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	164172000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	23765000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	9602000	usd
CY2022	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	304000	usd
CY2022	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	18832000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	179011000	usd
CY2023	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	25500000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	204000	usd
CY2023	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	20946000	usd
CY2023	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	20237000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	205424000	usd
CY2023Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	38915000	usd
CY2023Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	166509000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	46052000	usd
CY2022Q4	us-gaap	Restricted Investments Noncurrent RestrictedInvestmentsNoncurrent	105735000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	80254000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	114106000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2422000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	3527000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	6620000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1149000	usd
CY2023	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	83781000	usd
CY2022	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	120726000	usd
CY2021	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	3571000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	35824000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-1726000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-3000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3898000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-12795000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-160000	usd
CY2023	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	39722000	usd
CY2022	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	-14521000	usd
CY2021	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	-163000	usd
CY2023	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	116078000	usd
CY2022	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	112380000	usd
CY2021	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	2419000	usd
CY2023	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	7425000	usd
CY2022	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-6175000	usd
CY2021	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	989000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	123503000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	106205000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3408000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	23826000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	1271000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	1555000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	177547000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	326497000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	61362000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-36685000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-50277000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-11864000	usd
CY2023	us-gaap	Effective Income Tax Rate Reconciliation Fdii Amount EffectiveIncomeTaxRateReconciliationFdiiAmount	24291000	usd
CY2022	us-gaap	Effective Income Tax Rate Reconciliation Fdii Amount EffectiveIncomeTaxRateReconciliationFdiiAmount	69917000	usd
CY2021	us-gaap	Effective Income Tax Rate Reconciliation Fdii Amount EffectiveIncomeTaxRateReconciliationFdiiAmount	1453000	usd
CY2023	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-5658000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-119082000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-78043000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5932000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	14625000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	12440000	usd
CY2023	amr	Effective Income Tax Rate Reconciliation Changein Enacted State Tax Rate Amount EffectiveIncomeTaxRateReconciliationChangeinEnactedStateTaxRateAmount	2863000	usd
CY2022	amr	Effective Income Tax Rate Reconciliation Changein Enacted State Tax Rate Amount EffectiveIncomeTaxRateReconciliationChangeinEnactedStateTaxRateAmount	273000	usd
CY2021	amr	Effective Income Tax Rate Reconciliation Changein Enacted State Tax Rate Amount EffectiveIncomeTaxRateReconciliationChangeinEnactedStateTaxRateAmount	8751000	usd
CY2023	amr	Effective Income Tax Rate Reconciliation Capital Loss Expiration EffectiveIncomeTaxRateReconciliationCapitalLossExpiration	0	usd
CY2022	amr	Effective Income Tax Rate Reconciliation Capital Loss Expiration EffectiveIncomeTaxRateReconciliationCapitalLossExpiration	140000	usd
CY2021	amr	Effective Income Tax Rate Reconciliation Capital Loss Expiration EffectiveIncomeTaxRateReconciliationCapitalLossExpiration	10552000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	9934000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	5573000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	1429000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-6968000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-3588000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	405000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	829000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1961000	usd
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Files In Submission

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$AMR
Alpha Metallurgical Resources, Inc. Stock $amr

2024 Q1 Form 10-K Financial Statement

#000170471524000028 Filed on February 26, 2024

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$AMR Alpha Metallurgical Resources, Inc. Stock $amr

2024 Q1 Form 10-K Financial Statement

#000170471524000028 Filed on February 26, 2024

Income Statement

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$AMR
Alpha Metallurgical Resources, Inc. Stock $amr