$AMR
Alpha Metallurgical Resources, Inc. Stock $amr

$amr Overview Financials Valuation SEC Filings Company Website

2023 Q1 Form 10-K Financial Statement

#000170471523000010 Filed on February 23, 2023

Income Statement

Concept	2023 Q1	2022 Q4	2022
Revenue	$911.2M	$823.4M	$4.102B
YoY Change	-14.99%	-0.58%	81.6%
Cost Of Revenue	$539.1M	$549.3M	$2.286B
YoY Change	-2.91%	10.43%	36.09%
Gross Profit	$372.1M	$274.2M	$1.816B
YoY Change	-27.98%	-17.12%	213.66%
Gross Profit Margin	40.83%	33.3%	44.27%
Selling, General & Admin	$20.69M	$23.28M	$71.62M
YoY Change	37.16%	22.46%	12.08%
% of Gross Profit	5.56%	8.49%	3.94%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$29.42M	$27.39M	$127.1M
YoY Change	4.95%	-18.55%	3.1%
% of Gross Profit	7.91%	9.99%	7.0%
Operating Expenses	$20.69M	$59.41M	$71.62M
YoY Change	37.16%	11.03%	12.08%
Operating Profit	$314.5M	$214.8M	$1.581B
YoY Change	-30.59%	-22.55%	342.65%
Interest Expense	$1.720M	-$6.059M	$21.80M
YoY Change	-86.85%	-68.67%	-68.7%
% of Operating Profit	0.55%	-2.82%	1.38%
Other Income/Expense, Net	-$1.319M	$1.948M	-$26.13M
YoY Change	-89.42%	35.09%	-60.77%
Pretax Income	$313.2M	$212.4M	$1.555B
YoY Change	-28.92%	-17.64%	435.13%
Income Tax	$42.41M	-$7.868M	$106.2M
% Of Pretax Income	13.54%	-3.7%	6.83%
Net Earnings	$270.8M	$220.7M	$1.449B
YoY Change	-32.46%	-14.28%	401.59%
Net Earnings / Revenue	29.71%	26.8%	35.32%
Basic Earnings Per Share	$17.74		$82.82
Diluted Earnings Per Share	$17.01	$13.38	$79.49
COMMON SHARES
Basic Shares Outstanding	15.17M shares	15.94M shares	17.49M shares
Diluted Shares Outstanding	15.92M shares		18.22M shares

Balance Sheet

Concept	2023 Q1	2022 Q4	2022
SHORT-TERM ASSETS
Cash & Short-Term Investments	$222.5M	$348.0M	$348.0M
YoY Change	39.54%	328.46%	328.46%
Cash & Equivalents	$222.5M	$301.9M	$301.9M
Short-Term Investments	$0.00	$46.05M	$46.05M
Other Short-Term Assets	$57.05M	$158.7M	$158.7M
YoY Change	-0.28%	229.54%	260.71%
Inventory	$266.7M	$200.6M	$200.6M
Prepaid Expenses
Receivables	$546.3M	$407.2M	$407.2M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.092B	$1.114B	$1.114B
YoY Change	7.68%	48.99%	48.99%
LONG-TERM ASSETS
Property, Plant & Equipment	$944.9M	$898.2M	$898.2M
YoY Change	17.19%	11.37%	10.68%
Goodwill		$10.74M
YoY Change
Intangibles	$52.91M	$55.10M
YoY Change	-22.71%	-25.74%
Long-Term Investments		$23.07M	$23.07M
YoY Change		12.76%	12.76%
Other Assets	$107.0M	$103.2M	$211.0M
YoY Change	10.64%	0.57%	3.64%
Total Long-Term Assets	$1.257B	$1.198B	$1.198B
YoY Change	14.4%	7.96%	7.96%
TOTAL ASSETS
Total Short-Term Assets	$1.092B	$1.114B	$1.114B
Total Long-Term Assets	$1.257B	$1.198B	$1.198B
Total Assets	$2.349B	$2.312B	$2.312B
YoY Change	11.17%	24.48%	24.48%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$122.7M	$106.0M	$106.0M
YoY Change	12.18%	17.7%	17.7%
Accrued Expenses	$110.7M	$113.9M	$114.9M
YoY Change	-50.43%	-34.79%	5.18%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$3.562M	$3.078M	$3.078M
YoY Change	46.34%	2.98%	2.98%
Total Short-Term Liabilities	$316.6M	$402.6M	$402.6M
YoY Change	-12.28%	36.05%	36.05%
LONG-TERM LIABILITIES
Long-Term Debt	$8.379M	$7.897M	$7.897M
YoY Change	-96.63%	-98.23%	-98.23%
Other Long-Term Liabilities	$18.51M	$20.20M	$461.3M
YoY Change	-18.17%	-22.84%	-18.92%
Total Long-Term Liabilities	$18.51M	$20.20M	$469.2M
YoY Change	-18.17%	-22.84%	-53.75%
TOTAL LIABILITIES
Total Short-Term Liabilities	$316.6M	$402.6M	$402.6M
Total Long-Term Liabilities	$18.51M	$20.20M	$469.2M
Total Liabilities	$800.5M	$882.7M	$882.7M
YoY Change	-32.34%	-32.66%	-32.66%
SHAREHOLDERS EQUITY
Retained Earnings	$1.539B	$1.275B
YoY Change	367.65%	-1877.72%
Common Stock	$218.0K	$217.0K
YoY Change	3.81%	4.33%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$1.549B	$1.430B	$1.430B
YoY Change
Total Liabilities & Shareholders Equity	$2.349B	$2.312B	$2.312B
YoY Change	11.17%	24.48%	24.48%

Cashflow Statement

Concept	2023 Q1	2022 Q4	2022
OPERATING ACTIVITIES
Net Income	$270.8M	$220.7M	$1.449B
YoY Change	-32.46%	-14.28%	401.59%
Depreciation, Depletion And Amortization	$29.42M	$27.39M	$127.1M
YoY Change	4.95%	-18.55%	3.1%
Cash From Operating Activities	$177.4M	$185.0M	$1.484B
YoY Change	-47.23%	77.22%	748.28%
INVESTING ACTIVITIES
Capital Expenditures	$74.25M	$60.96M	$164.3M
YoY Change	-363.8%	-366.03%	-297.25%
Acquisitions
YoY Change
Other Investing Activities	-$12.00K	-$85.84M	$4.214M
YoY Change	-100.97%	1750.29%	24.6%
Cash From Investing Activities	-$27.89M	-$146.8M	-$329.4M
YoY Change	685.22%	432.77%	266.54%
FINANCING ACTIVITIES
Cash Dividend Paid	$85.98M	$6.522M	$13.36M
YoY Change
Common Stock Issuance & Retirement, Net			$521.8M
YoY Change			66287.15%
Debt Paid & Issued, Net	$438.0K		$450.6M
YoY Change	-99.78%		278.37%
Cash From Financing Activities	-$231.5M	-137.7M	-$981.9M
YoY Change	5.35%	114.78%	567.73%
NET CHANGE
Cash From Operating Activities	$177.4M	185.0M	$1.484B
Cash From Investing Activities	-$27.89M	-146.8M	-$329.4M
Cash From Financing Activities	-$231.5M	-137.7M	-$981.9M
Net Change In Cash	-$81.96M	-99.56M	$172.8M
YoY Change	-172.61%	-884.68%	-378.87%
FREE CASH FLOW
Cash From Operating Activities	$177.4M	$185.0M	$1.484B
Capital Expenditures	$74.25M	$60.96M	$164.3M
Free Cash Flow	$103.1M	$124.0M	$1.320B
YoY Change	-71.69%	-2.57%	411.03%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2022	dei	Entity Central Index Key EntityCentralIndexKey	0001704715
CY2022	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2022
CY2022	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2022Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P1Y
CY2020	us-gaap	Impairment Long Lived Asset Held For Use Statement Of Income Or Comprehensive Income Extensible Enumeration ImpairmentLongLivedAssetHeldForUseStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2022#RestructuringCostsAndAssetImpairmentCharges
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset Statement Of Financial Position Extensible List FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherAssetsNoncurrent
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherAssetsNoncurrent
CY2021Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebtAndCapitalLeaseObligationsCurrent
CY2022Q4	us-gaap	Finance Lease Liability Current Statement Of Financial Position Extensible List FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebtAndCapitalLeaseObligationsCurrent
CY2022Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://www.alphametresources.com/20221231#AccruedLiabilitiesandOtherLiabilitiesCurrent
CY2021Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://www.alphametresources.com/20221231#AccruedLiabilitiesandOtherLiabilitiesCurrent
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebtAndCapitalLeaseObligations
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent Statement Of Financial Position Extensible List FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#LongTermDebtAndCapitalLeaseObligations
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherLiabilitiesNoncurrent
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2022#OtherLiabilitiesNoncurrent
CY2022	dei	Document Annual Report DocumentAnnualReport	true
CY2022	us-gaap	Fair Value Recurring Basis Unobservable Input Reconciliation Liability Gain Loss Statement Of Income Extensible List FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList	http://www.alphametresources.com/20221231#AcquisitionRelatedObligationsChangesinFairValueGainLoss
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CY2022	dei	Document Type DocumentType	10-K
CY2022	dei	Document Period End Date DocumentPeriodEndDate	2022-12-31
CY2022	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2022	dei	Document Transition Report DocumentTransitionReport	false
CY2022	dei	Entity File Number EntityFileNumber	001-38735
CY2022	dei	Entity Registrant Name EntityRegistrantName	ALPHA METALLURGICAL RESOURCES, INC.
CY2022	dei	Entity Registrant Name EntityRegistrantName	ALPHA METALLURGICAL RESOURCES, INC.
CY2022	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2022	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	81-3015061
CY2022	dei	Entity Address Address Line1 EntityAddressAddressLine1	340 Martin Luther King Jr. Blvd.
CY2022	dei	Entity Address City Or Town EntityAddressCityOrTown	Bristol
CY2022	dei	Entity Address State Or Province EntityAddressStateOrProvince	TN
CY2022	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	37620
CY2022	dei	City Area Code CityAreaCode	423
CY2022	dei	Local Phone Number LocalPhoneNumber	573-0300
CY2022	dei	Security12b Title Security12bTitle	Common Stock, par value $0.01 per share
CY2022	dei	Trading Symbol TradingSymbol	AMR
CY2022	dei	Security Exchange Name SecurityExchangeName	NYSE
CY2022	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2022	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2022	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2022	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2022	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2022	dei	Entity Small Business EntitySmallBusiness	false
CY2022	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2022	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2022	dei	Entity Shell Company EntityShellCompany	false
CY2022Q2	dei	Entity Public Float EntityPublicFloat	1600000000	usd
CY2023Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	15170451	shares
CY2022	dei	Auditor Firm AuditorFirmId	49
CY2022	dei	Auditor Name AuditorName	RSM US LLP
CY2022	dei	Auditor Location AuditorLocation	Atlanta, Georgia
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4092987000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2252624000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1413124000	usd
CY2022	us-gaap	Other Income OtherIncome	8605000	usd
CY2021	us-gaap	Other Income OtherIncome	6062000	usd
CY2020	us-gaap	Other Income OtherIncome	3063000	usd
CY2022	us-gaap	Revenues Revenues	4101592000	usd
CY2021	us-gaap	Revenues Revenues	2258686000	usd
CY2020	us-gaap	Revenues Revenues	1416187000	usd
CY2022	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	2285969000	usd
CY2021	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	1677782000	usd
CY2020	us-gaap	Cost Of Goods And Service Excluding Depreciation Depletion And Amortization CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization	1281011000	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
CY2020	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	139885000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	23765000	usd
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	26520000	usd
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	26504000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19498000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13244000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9214000	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
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	83878000	usd
CY2022	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	71618000	usd
CY2021	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	63901000	usd
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	57356000	usd
CY2022	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	-8880000	usd
CY2021	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	-19525000	usd
CY2020	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	8750000	usd
CY2022	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-3363000	usd
CY2021	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	10972000	usd
CY2020	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	2223000	usd
CY2022	us-gaap	Costs And Expenses CostsAndExpenses	2520713000	usd
CY2021	us-gaap	Costs And Expenses CostsAndExpenses	1899486000	usd
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	1586875000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	1580879000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	359200000	usd
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	-170688000	usd
CY2022	us-gaap	Interest Expense InterestExpense	21802000	usd
CY2021	us-gaap	Interest Expense InterestExpense	69654000	usd
CY2020	us-gaap	Interest Expense InterestExpense	74528000	usd
CY2022	us-gaap	Investment Income Interest InvestmentIncomeInterest	3187000	usd
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	336000	usd
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	7027000	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
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-3473000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6832000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	6465000	usd
CY2020	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-1972000	usd
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CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-67002000	usd
CY2020	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-72946000	usd
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CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-243634000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	106205000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3408000	usd
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CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	288790000	usd
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-241470000	usd
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CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
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CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-205429000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
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CY2020	us-gaap	Net Income Loss NetIncomeLoss	-446899000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	82.82
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	15.66
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-13.20
CY2022	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	-11.22
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	82.82
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.66
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-24.42
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	79.49
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	15.30
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-13.20
CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	-11.22
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	79.49
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	15.30
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-24.42
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
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18298362	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
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18298362	shares
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	288790000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-446899000	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
CY2020	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Net Unamortized Gain Loss Arising During Period Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansNetUnamortizedGainLossArisingDuringPeriodBeforeTax	-60647000	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
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodTax	0	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
CY2020	us-gaap	Other Comprehensive Income Defined Benefit Plans Net Unamortized Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax	-60647000	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
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax	-7278000	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
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossTax	0	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
CY2020	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci Pension And Other Postretirement Benefit Plans For Net Gain Loss Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossNetOfTax	-7278000	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
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-53369000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1494886000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	342272000	usd
CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-500268000	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
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	46052000	usd
CY2021Q4	us-gaap	Short Term Investments ShortTermInvestments	0	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	239000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	393000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	407210000	usd
CY2021Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	489241000	usd
CY2022Q4	us-gaap	Inventory Net InventoryNet	200574000	usd
CY2021Q4	us-gaap	Inventory Net InventoryNet	129382000	usd
CY2022Q4	us-gaap	Deposits Assets Current DepositsAssetsCurrent	84748000	usd
CY2021Q4	us-gaap	Deposits Assets Current DepositsAssetsCurrent	425000	usd
CY2022Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	24547000	usd
CY2021Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	11977000	usd
CY2022Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	49384000	usd
CY2021Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	35750000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	1114421000	usd
CY2021Q4	us-gaap	Assets Current AssetsCurrent	747986000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	491186000	usd
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	443856000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	442645000	usd
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	362218000	usd
CY2022Q4	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	77333000	usd
CY2021Q4	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	52444000	usd
CY2022Q4	us-gaap	Mineral Rights MineralRights	451062000	usd
CY2021Q4	us-gaap	Mineral Rights MineralRights	444302000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	53719000	usd
CY2021Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	34221000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	55102000	usd
CY2021Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	74197000	usd
CY2022Q4	us-gaap	Restricted Investments Noncurrent RestrictedInvestmentsNoncurrent	105735000	usd
CY2021Q4	us-gaap	Restricted Investments Noncurrent RestrictedInvestmentsNoncurrent	30949000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	28941000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	89426000	usd
CY2022Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	11378000	usd
CY2021Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	0	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	103195000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	108634000	usd
CY2022Q4	us-gaap	Assets Assets	2312479000	usd
CY2021Q4	us-gaap	Assets Assets	1857712000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3078000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2989000	usd
CY2022Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	106037000	usd
CY2021Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	90093000	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	28254000	usd
CY2021Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	22405000	usd
CY2022Q4	amr	Accrued Liabilitiesand Other Liabilities Current AccruedLiabilitiesandOtherLiabilitiesCurrent	265256000	usd
CY2021Q4	amr	Accrued Liabilitiesand Other Liabilities Current AccruedLiabilitiesandOtherLiabilitiesCurrent	180442000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	402625000	usd
CY2021Q4	us-gaap	Liabilities Current LiabilitiesCurrent	295929000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7897000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	445562000	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount Noncurrent AcquisitionRelatedObligationsCarryingAmountNoncurrent	0	usd
CY2021Q4	amr	Acquisition Related Obligations Carrying Amount Noncurrent AcquisitionRelatedObligationsCarryingAmountNoncurrent	19000000	usd
CY2022Q4	amr	Liability Defined Benefit Plan Postretirement Black Lung Health Coverageand Workers Compensation Noncurrent LiabilityDefinedBenefitPlanPostretirementBlackLungHealthCoverageandWorkersCompensationNoncurrent	188247000	usd
CY2021Q4	amr	Liability Defined Benefit Plan Postretirement Black Lung Health Coverageand Workers Compensation Noncurrent LiabilityDefinedBenefitPlanPostretirementBlackLungHealthCoverageandWorkersCompensationNoncurrent	231876000	usd
CY2022Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	110836000	usd
CY2022Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	159930000	usd
CY2022Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	142048000	usd
CY2021Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	132013000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	10874000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	317000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	20197000	usd
CY2021Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	26176000	usd
CY2022Q4	us-gaap	Liabilities Liabilities	882724000	usd
CY2021Q4	us-gaap	Liabilities Liabilities	1310803000	usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2021Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000.0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000.0	shares
CY2021Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2022Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2021Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	usd
CY2021Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2022Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000.0	shares
CY2021Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	50000000.0	shares
CY2022Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	21700000	shares
CY2022Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	15500000	shares
CY2021Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	20800000	shares
CY2021Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	18400000	shares
CY2022Q4	us-gaap	Common Stock Value CommonStockValue	217000	usd
CY2021Q4	us-gaap	Common Stock Value CommonStockValue	208000	usd
CY2022Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	815442000	usd
CY2021Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	784743000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-12162000	usd
CY2021Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-58503000	usd
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	6200000	shares
CY2021Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	2400000	shares
CY2022Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	649061000	usd
CY2021Q4	us-gaap	Treasury Stock Common Value TreasuryStockCommonValue	107800000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1275319000	usd
CY2021Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-71739000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	1429755000	usd
CY2021Q4	us-gaap	Stockholders Equity StockholdersEquity	546909000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	2312479000	usd
CY2021Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1857712000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	288790000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-446899000	usd
CY2022	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles Including Discontinued Operations DepreciationDepletionAndAmortizationExcludingAcquiredIntangiblesIncludingDiscontinuedOperations	107620000	usd
CY2021	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles Including Discontinued Operations DepreciationDepletionAndAmortizationExcludingAcquiredIntangiblesIncludingDiscontinuedOperations	110047000	usd
CY2020	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles Including Discontinued Operations DepreciationDepletionAndAmortizationExcludingAcquiredIntangiblesIncludingDiscontinuedOperations	151455000	usd
CY2022	amr	Amortization Of Intangibles Including Discontinued Operations AmortizationOfIntangiblesIncludingDiscontinuedOperations	19498000	usd
CY2021	amr	Amortization Of Intangibles Including Discontinued Operations AmortizationOfIntangiblesIncludingDiscontinuedOperations	13244000	usd
CY2020	amr	Amortization Of Intangibles Including Discontinued Operations AmortizationOfIntangiblesIncludingDiscontinuedOperations	10075000	usd
CY2022	amr	Acquisition Related Obligations Discount Accretion Expense AcquisitionRelatedObligationsDiscountAccretionExpense	-233000	usd
CY2021	amr	Acquisition Related Obligations Discount Accretion Expense AcquisitionRelatedObligationsDiscountAccretionExpense	-1258000	usd
CY2020	amr	Acquisition Related Obligations Discount Accretion Expense AcquisitionRelatedObligationsDiscountAccretionExpense	-3342000	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
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	14772000	usd
CY2022	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	-8880000	usd
CY2021	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	-19525000	usd
CY2020	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	8750000	usd
CY2022	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2021	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	usd
CY2020	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	-36113000	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
CY2020	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2401000	usd
CY2022	amr	Asset Retirement Obligation Accretion Expense Including Adjustmentfor Liabilities Heldfor Saleand Discontinued Operations AssetRetirementObligationAccretionExpenseIncludingAdjustmentforLiabilitiesHeldforSaleandDiscontinuedOperations	23765000	usd
CY2021	amr	Asset Retirement Obligation Accretion Expense Including Adjustmentfor Liabilities Heldfor Saleand Discontinued Operations AssetRetirementObligationAccretionExpenseIncludingAdjustmentforLiabilitiesHeldforSaleandDiscontinuedOperations	26520000	usd
CY2020	amr	Asset Retirement Obligation Accretion Expense Including Adjustmentfor Liabilities Heldfor Saleand Discontinued Operations AssetRetirementObligationAccretionExpenseIncludingAdjustmentforLiabilitiesHeldforSaleandDiscontinuedOperations	30658000	usd
CY2022	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-4492000	usd
CY2021	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	-1751000	usd
CY2020	us-gaap	Increase Decrease In Pension And Postretirement Obligations IncreaseDecreaseInPensionAndPostretirementObligations	14439000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-14521000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-163000	usd
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	33123000	usd
CY2022	amr	Restructuringand Asset Impairment Charges Including Discontinued Operations RestructuringandAssetImpairmentChargesIncludingDiscontinuedOperations	0	usd
CY2021	amr	Restructuringand Asset Impairment Charges Including Discontinued Operations RestructuringandAssetImpairmentChargesIncludingDiscontinuedOperations	-561000	usd
CY2020	amr	Restructuringand Asset Impairment Charges Including Discontinued Operations RestructuringandAssetImpairmentChargesIncludingDiscontinuedOperations	256518000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	7484000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	5315000	usd
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	4896000	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
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-3473000	usd
CY2022	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-994000	usd
CY2021	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-6570000	usd
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-5972000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-82774000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	336240000	usd
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-91190000	usd
CY2022	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	63169000	usd
CY2021	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	21331000	usd
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-48689000	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
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-28152000	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
CY2020	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	17926000	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
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	6753000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	3721000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	25154000	usd
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-28620000	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
CY2020	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	15428000	usd
CY2022	amr	Increase Decreasein Acquisition Related Obligations IncreaseDecreaseinAcquisitionRelatedObligations	22264000	usd
CY2021	amr	Increase Decreasein Acquisition Related Obligations IncreaseDecreaseinAcquisitionRelatedObligations	18121000	usd
CY2020	amr	Increase Decreasein Acquisition Related Obligations IncreaseDecreaseinAcquisitionRelatedObligations	32560000	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
CY2020	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-19375000	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
CY2020	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-43831000	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
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	129236000	usd
CY2022	amr	Paymentsto Acquire Productive Assets Including Discontinued Operations PaymentstoAcquireProductiveAssetsIncludingDiscontinuedOperations	164309000	usd
CY2021	amr	Paymentsto Acquire Productive Assets Including Discontinued Operations PaymentstoAcquireProductiveAssetsIncludingDiscontinuedOperations	83300000	usd
CY2020	amr	Paymentsto Acquire Productive Assets Including Discontinued Operations PaymentstoAcquireProductiveAssetsIncludingDiscontinuedOperations	153990000	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
CY2020	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	4023000	usd
CY2022	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	24878000	usd
CY2021	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2020	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	0	usd
CY2022	amr	Cash Paid On Sale Of Business CashPaidOnSaleOfBusiness	0	usd
CY2021	amr	Cash Paid On Sale Of Business CashPaidOnSaleOfBusiness	0	usd
CY2020	amr	Cash Paid On Sale Of Business CashPaidOnSaleOfBusiness	52192000	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
CY2020	amr	Payments To Acquire Equity Method Investments Capital Contributions PaymentsToAcquireEquityMethodInvestmentsCapitalContributions	3443000	usd
CY2022	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	269420000	usd
CY2021	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	17985000	usd
CY2020	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	21129000	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
CY2020	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	16685000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4214000	usd
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	717992	shares
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3382000	usd
CY2020	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-77000	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
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-209969000	usd
CY2022	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	usd
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	57500000	usd
CY2022	amr	Repurchases Of Long Term Debt RepurchasesOfLongTermDebt	0	usd
CY2021	amr	Repurchases Of Long Term Debt RepurchasesOfLongTermDebt	18415000	usd
CY2020	amr	Repurchases Of Long Term Debt RepurchasesOfLongTermDebt	0	usd
CY2022	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	450622000	usd
CY2021	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	119097000	usd
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	76491000	usd
CY2022	us-gaap	Payments Of Dividends PaymentsOfDividends	13360000	usd
CY2021	us-gaap	Payments Of Dividends PaymentsOfDividends	0	usd
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	0	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	521803000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	786000	usd
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	209000	usd
CY2022	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	5643000	usd
CY2021	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	usd
CY2020	us-gaap	Proceeds From Warrant Exercises ProceedsFromWarrantExercises	0	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
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3176000	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
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-22376000	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
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-103109000	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
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	347680000	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
CY2022	us-gaap	Interest Paid Net InterestPaidNet	25895000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	63061000	usd
CY2020	us-gaap	Interest Paid Net InterestPaidNet	49294000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	139663000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	176000	usd
CY2020	us-gaap	Income Taxes Paid IncomeTaxesPaid	5000	usd
CY2022	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	6000	usd
CY2021	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	64498000	usd
CY2020	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	68801000	usd
CY2022	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	9833000	usd
CY2021	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	787000	usd
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	4411000	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
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	7493000	usd
CY2022	amr	Accrued Common Stock Repurchases AccruedCommonStockRepurchases	3016000	usd
CY2021	amr	Accrued Common Stock Repurchases AccruedCommonStockRepurchases	0	usd
CY2020	amr	Accrued Common Stock Repurchases AccruedCommonStockRepurchases	0	usd
CY2022Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	88128000	usd
CY2021Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	0	usd
CY2020Q4	us-gaap	Dividends Payable Current And Noncurrent DividendsPayableCurrentAndNoncurrent	0	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
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	139227000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	24547000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	11977000	usd
CY2020Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	9311000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	28941000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	89426000	usd
CY2020Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	96033000	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
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	696122000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-446899000	usd
CY2020	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-53369000	usd
CY2020	amr	Share Based Compensation Issuance Of Stock For Share Vesting And Stock Reissuance ShareBasedCompensationIssuanceOfStockForShareVestingAndStockReissuance	4897000	usd
CY2020	amr	Treasury Stock Value Acquired Cost Method And Related Expenses TreasuryStockValueAcquiredCostMethodAndRelatedExpenses	209000	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
CY2022	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Reclassifications</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%">Certain immaterial amounts as of and for the years ended December 31, 2022 and 2021 in the Consolidated Financials Statements and notes to the Consolidated Financials Statements have been recast to reclassify discontinued operations and present the related amounts within continuing operations as part of the All Other category. Additionally, certain amounts in the prior year Consolidated Statements of Stockholders’ Equity have been reclassified to conform to the current year presentation.</span></div>
CY2022	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:115%">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; fair value of financial instruments; and fair value adjustments for acquisition accounting. Estimates are based on facts and circumstances believed to be reasonable at the time; however, actual results could differ from those estimates.</span></div>
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022Q4	us-gaap	Mineral Rights MineralRights	451062000	usd
CY2021Q4	us-gaap	Mineral Rights MineralRights	444302000	usd
CY2022Q4	amr	Asset Retirement Obligation Assets AssetRetirementObligationAssets	20284000	usd
CY2021Q4	amr	Asset Retirement Obligation Assets AssetRetirementObligationAssets	10354000	usd
CY2022	us-gaap	Depletion Depletion	23078000	usd
CY2021	us-gaap	Depletion Depletion	23541000	usd
CY2020	us-gaap	Depletion Depletion	-13746000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	8526000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	6705000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	5893000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	5373000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	4792000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	23813000	usd
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2022Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	22824000	usd
CY2021Q4	us-gaap	Workers Compensation Discount Amount WorkersCompensationDiscountAmount	23442000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	23070000	usd
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	20460000	usd
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4092987000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2252624000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1413124000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	128341000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	37250000	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	0	usd
CY2022Q4	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	165591000	usd
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1317351	shares
CY2021	amr	Weighted Average Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount WeightedAverageAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	142250	shares
CY2022	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1448545000	usd
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	288790000	usd
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-241470000	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2020	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-205429000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	1448545000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	288790000	usd
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-446899000	usd
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
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18298362	shares
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	82.82
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	15.66
CY2022	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2020	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-13.20
CY2022	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	0
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerBasicShare	-11.22
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	82.82
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	15.66
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-24.42
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
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18298362	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
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18298362	shares
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	79.49
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	15.30
CY2020	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-13.20
CY2021	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	0
CY2020	us-gaap	Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share DiscontinuedOperationIncomeLossFromDiscontinuedOperationNetOfTaxPerDilutedShare	-11.22
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	79.49
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	15.30
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-24.42
CY2022Q4	us-gaap	Inventory Net InventoryNet	200574000	usd
CY2021Q4	us-gaap	Inventory Net InventoryNet	129382000	usd
CY2020Q1	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	33709000	usd
CY2020Q2	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	17390000	usd
CY2020Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	219000	usd
CY2020Q4	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	29636000	usd
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	80954000	usd
CY2020Q1	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	usd
CY2020Q2	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	144348000	usd
CY2020Q3	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	3297000	usd
CY2020Q4	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	usd
CY2020	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	147645000	usd
CY2020Q1	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	33709000	usd
CY2020Q2	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	161738000	usd
CY2020Q3	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	3516000	usd
CY2020Q4	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	29636000	usd
CY2020	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	228599000	usd
CY2020Q1	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	33709000	usd
CY2020Q2	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	17390000	usd
CY2020Q3	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	219000	usd
CY2020Q4	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	29636000	usd
CY2020	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	80954000	usd
CY2020Q1	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	usd
CY2020Q2	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	144348000	usd
CY2020Q3	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	3297000	usd
CY2020Q4	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	0	usd
CY2020	us-gaap	Impairment Of Long Lived Assets To Be Disposed Of ImpairmentOfLongLivedAssetsToBeDisposedOf	147645000	usd
CY2020Q1	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	33709000	usd
CY2020Q2	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	161738000	usd
CY2020Q3	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	3516000	usd
CY2020Q4	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	29636000	usd
CY2020	us-gaap	Tangible Asset Impairment Charges TangibleAssetImpairmentCharges	228599000	usd
CY2022Q1	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	150000000	usd
CY2022Q2	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	600000000	usd
CY2022Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	1000000000	usd
	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	3544413	shares
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	516952000	usd
	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	516845000	usd
	amr	Stock Repurchase Program Expenses StockRepurchaseProgramExpenses	107000	usd
CY2022Q2	amr	Common Stock Dividends Per Share Intended But Not Yet Declared CommonStockDividendsPerShareIntendedButNotYetDeclared	0.375
CY2022Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.375
CY2022Q3	us-gaap	Payments Of Dividends PaymentsOfDividends	6773000	usd
CY2022Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.392
CY2022Q4	us-gaap	Payments Of Dividends PaymentsOfDividends	6522000	usd
CY2022Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	5.418
CY2022Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.418
CY2022	amr	Dividend Equivalent DividendEquivalent	3444000	usd
CY2022Q4	amr	Deposits Dividends DepositsDividends	84748000	usd
CY2016Q3	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	810811	shares
CY2022Q1	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	46.911
CY2022Q2	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	46.804
CY2022Q2	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight	1.15	shares
CY2022Q3	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	46.679
CY2022Q4	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	45.086
CY2022Q3	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight	1.16	shares
CY2022Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Each Warrant Or Right ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight	1.20	shares
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
CY2020Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	801370	shares
CY2020Q4	us-gaap	Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights	921576	shares
CY2020	amr	Stock Issued During Period Shares Exercise Of Warrants StockIssuedDuringPeriodSharesExerciseOfWarrants	0	shares
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	933831000	usd
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	806074000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	491186000	usd
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	443856000	usd
CY2022Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	442645000	usd
CY2021Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	362218000	usd
CY2022	amr	Depreciation And Amortization Property Plant And Equipment And Non Mineral Asset Retirement Obligation Assets DepreciationAndAmortizationPropertyPlantAndEquipmentAndNonMineralAssetRetirementObligationAssets	84542000	usd
CY2021	amr	Depreciation And Amortization Property Plant And Equipment And Non Mineral Asset Retirement Obligation Assets DepreciationAndAmortizationPropertyPlantAndEquipmentAndNonMineralAssetRetirementObligationAssets	86506000	usd
CY2020	amr	Depreciation And Amortization Property Plant And Equipment And Non Mineral Asset Retirement Obligation Assets DepreciationAndAmortizationPropertyPlantAndEquipmentAndNonMineralAssetRetirementObligationAssets	153631000	usd
CY2022Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	7476000	usd
CY2021Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	10788000	usd
CY2022Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	1363000	usd
CY2021Q4	us-gaap	Deposits Assets Noncurrent DepositsAssetsNoncurrent	1371000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	23070000	usd
CY2021Q4	us-gaap	Equity Method Investments EquityMethodInvestments	20460000	usd
CY2022Q4	amr	Insurance Receivablefor Workers Compensation Noncurrent InsuranceReceivableforWorkersCompensationNoncurrent	44734000	usd
CY2021Q4	amr	Insurance Receivablefor Workers Compensation Noncurrent InsuranceReceivableforWorkersCompensationNoncurrent	51355000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	10736000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	0	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	15816000	usd
CY2021Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	24660000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	103195000	usd
CY2021Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	108634000	usd
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	5429000	usd
CY2021Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	2987000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4488000	usd
CY2021Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	5003000	usd
CY2022Q4	amr	Lease Rightof Use Asset LeaseRightofUseAsset	9917000	usd
CY2021Q4	amr	Lease Rightof Use Asset LeaseRightofUseAsset	7990000	usd
CY2022Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1052000	usd
CY2021Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	1878000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	612000	usd
CY2021Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	547000	usd
CY2022Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	3744000	usd
CY2021Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	791000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	3876000	usd
CY2021Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	4456000	usd
CY2022Q4	amr	Lease Liability LeaseLiability	9284000	usd
CY2021Q4	amr	Lease Liability LeaseLiability	7672000	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
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	3238000	usd
CY2022	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	315000	usd
CY2021	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	245000	usd
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	358000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	1113000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	1383000	usd
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	2105000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1234000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	786000	usd
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1518000	usd
CY2022	us-gaap	Lease Cost LeaseCost	5306000	usd
CY2021	us-gaap	Lease Cost LeaseCost	4475000	usd
CY2020	us-gaap	Lease Cost LeaseCost	7219000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	0	usd
CY2021	us-gaap	Sublease Income SubleaseIncome	0	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	0	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	0	usd
CY2022	amr	Lease Payments LeasePayments	5556000	usd
CY2021	amr	Lease Payments LeasePayments	4478000	usd
CY2020	amr	Lease Payments LeasePayments	7157000	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
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	358000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	2347000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	2169000	usd
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	3623000	usd
CY2022	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	2894000	usd
CY2021	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	2064000	usd
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	3176000	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
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	221000	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
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	-12000	usd
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P5Y10M24D
CY2021Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y9M
CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y11M8D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y1M6D
CY2021Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y10M17D
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y5M12D
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
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.061
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
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.115
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	1597000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1099000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	1335000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	955000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	1225000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	897000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	691000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	884000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	360000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	714000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	1800000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2062000	usd
CY2022Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	7008000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	6611000	usd
CY2022Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	2212000	usd
CY2022Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	2123000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	4796000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	4488000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	69458000	usd
CY2021Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	53564000	usd
CY2022Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	11651000	usd
CY2021Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	13312000	usd
CY2022Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	9664000	usd
CY2021Q4	us-gaap	Pension And Other Postretirement Defined Benefit Plans Current Liabilities PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities	7295000	usd
CY2022Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	24959000	usd
CY2021Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	31234000	usd
CY2022Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	36963000	usd
CY2021Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	32159000	usd
CY2022Q4	amr	Accrued Interest And Fees AccruedInterestAndFees	1062000	usd
CY2021Q4	amr	Accrued Interest And Fees AccruedInterestAndFees	14489000	usd
CY2022Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	86118000	usd
CY2021Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	0	usd
CY2022Q4	amr	Accrued Freight AccruedFreight	7181000	usd
CY2021Q4	amr	Accrued Freight AccruedFreight	15085000	usd
CY2022Q4	amr	Other Liabilities Miscellaneous Current OtherLiabilitiesMiscellaneousCurrent	18200000	usd
CY2021Q4	amr	Other Liabilities Miscellaneous Current OtherLiabilitiesMiscellaneousCurrent	13304000	usd
CY2022Q4	amr	Accrued Liabilitiesand Other Liabilities Current AccruedLiabilitiesandOtherLiabilitiesCurrent	265256000	usd
CY2021Q4	amr	Accrued Liabilitiesand Other Liabilities Current AccruedLiabilitiesandOtherLiabilitiesCurrent	180442000	usd
CY2022Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	0	usd
CY2021Q4	us-gaap	Debt Instrument Unamortized Discount Premium And Debt Issuance Costs Net DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet	6195000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	10975000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Including Current Maturities LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities	448551000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	3078000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	2989000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	7897000	usd
CY2021Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	445562000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	3078000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	3076000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	2879000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	468000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	171000	usd
CY2022Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1303000	usd
CY2022Q4	us-gaap	Long Term Debt LongTermDebt	10975000	usd
CY2022Q4	amr	Acquisition Related Obligations Discount Premium AcquisitionRelatedObligationsDiscountPremium	0	usd
CY2021Q4	amr	Acquisition Related Obligations Discount Premium AcquisitionRelatedObligationsDiscountPremium	233000	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount AcquisitionRelatedObligationsCarryingAmount	28254000	usd
CY2021Q4	amr	Acquisition Related Obligations Carrying Amount AcquisitionRelatedObligationsCarryingAmount	41405000	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	28254000	usd
CY2021Q4	amr	Acquisition Related Obligations Carrying Amount Current AcquisitionRelatedObligationsCarryingAmountCurrent	22405000	usd
CY2022Q4	amr	Acquisition Related Obligations Carrying Amount Noncurrent AcquisitionRelatedObligationsCarryingAmountNoncurrent	0	usd
CY2021Q4	amr	Acquisition Related Obligations Carrying Amount Noncurrent AcquisitionRelatedObligationsCarryingAmountNoncurrent	19000000	usd
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	165064000	usd
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	26520000	usd
CY2021	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	2125000	usd
CY2021	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-12744000	usd
CY2021	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	16793000	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
CY2022Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	36963000	usd
CY2022Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	142048000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	46052000	usd
CY2022Q4	us-gaap	Restricted Investments Noncurrent RestrictedInvestmentsNoncurrent	105735000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	114106000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	2422000	usd
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-35187000	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
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-99000	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
CY2020	us-gaap	Current Federal State And Local Tax Expense Benefit CurrentFederalStateAndLocalTaxExpenseBenefit	-35286000	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
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	33348000	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
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-226000	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
CY2020	us-gaap	Deferred Federal State And Local Tax Expense Benefit DeferredFederalStateAndLocalTaxExpenseBenefit	33122000	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
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	-1839000	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
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-325000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	106205000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3408000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2164000	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
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-51163000	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
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-2039000	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
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Fdii Amount EffectiveIncomeTaxRateReconciliationFdiiAmount	0	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
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	59929000	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
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-9640000	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
CY2020	amr	Effective Income Tax Rate Reconciliation Changein Enacted State Tax Rate Amount EffectiveIncomeTaxRateReconciliationChangeinEnactedStateTaxRateAmount	-1235000	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
CY2020	amr	Effective Income Tax Rate Reconciliation Capital Loss Expiration EffectiveIncomeTaxRateReconciliationCapitalLossExpiration	0	usd
CY2022	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	3946000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1663000	usd
CY2020	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	1984000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	106205000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3408000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2164000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	39200000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	36252000	usd
CY2022Q4	amr	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Excluding Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsExcludingAssetRetirementObligations	10572000	usd
CY2021Q4	amr	Deferred Tax Assets Tax Deferred Expense Reservesand Accruals Excluding Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsExcludingAssetRetirementObligations	9610000	usd
CY2022Q4	amr	Deferred Tax Assets Tax Deferred Expense Workers Compensation Benefits Obligation DeferredTaxAssetsTaxDeferredExpenseWorkersCompensationBenefitsObligation	38099000	usd
CY2021Q4	amr	Deferred Tax Assets Tax Deferred Expense Workers Compensation Benefits Obligation DeferredTaxAssetsTaxDeferredExpenseWorkersCompensationBenefitsObligation	47105000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	23826000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Pensions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions	34956000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	1555000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Equity Method Investments DeferredTaxAssetsEquityMethodInvestments	1846000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	43716000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2022	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	19385000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	137865000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	48940000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Capital Loss Carryforwards DeferredTaxAssetsCapitalLossCarryforwards	49476000	usd
CY2022Q4	amr	Deferred Tax Assets Tax Deferred Expense Reserveand Accruals Acquisition Related Obligations DeferredTaxAssetsTaxDeferredExpenseReserveandAccrualsAcquisitionRelatedObligations	6194000	usd
CY2021Q4	amr	Deferred Tax Assets Tax Deferred Expense Reserveand Accruals Acquisition Related Obligations DeferredTaxAssetsTaxDeferredExpenseReserveandAccrualsAcquisitionRelatedObligations	9156000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	7171000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	7100000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	219273000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	333366000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	53801000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	172883000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	165472000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	160483000	usd
CY2022Q4	amr	Deferred Tax Liabilities Property Plantand Mineral Rights DeferredTaxLiabilitiesPropertyPlantandMineralRights	148189000	usd
CY2021Q4	amr	Deferred Tax Liabilities Property Plantand Mineral Rights DeferredTaxLiabilitiesPropertyPlantandMineralRights	134075000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	11995000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	16408000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	4215000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	4955000	usd
CY2022Q4	amr	Deferred Tax Liabilities Restricted Cash DeferredTaxLiabilitiesRestrictedCash	556000	usd
CY2021Q4	amr	Deferred Tax Liabilities Restricted Cash DeferredTaxLiabilitiesRestrictedCash	5362000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	13000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	0	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	164968000	usd
CY2021Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	160800000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	504000	usd
CY2021Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	317000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	172883000	usd
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	263387000	usd
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	133020000	usd
CY2022	amr	Valuation Allowance Deferred Tax Asset Increase Decrease Recognizedin Income Tax Expense Amount ValuationAllowanceDeferredTaxAssetIncreaseDecreaseRecognizedinIncomeTaxExpenseAmount	-119082000	usd
CY2021	amr	Valuation Allowance Deferred Tax Asset Increase Decrease Recognizedin Income Tax Expense Amount ValuationAllowanceDeferredTaxAssetIncreaseDecreaseRecognizedinIncomeTaxExpenseAmount	-78043000	usd
CY2020	amr	Valuation Allowance Deferred Tax Asset Increase Decrease Recognizedin Income Tax Expense Amount ValuationAllowanceDeferredTaxAssetIncreaseDecreaseRecognizedinIncomeTaxExpenseAmount	117829000	usd
CY2022	amr	Valuation Allowance Deferred Tax Asset Increase Decrease Not Recognizedin Income Tax Expense Amount ValuationAllowanceDeferredTaxAssetIncreaseDecreaseNotRecognizedinIncomeTaxExpenseAmount	0	usd
CY2021	amr	Valuation Allowance Deferred Tax Asset Increase Decrease Not Recognizedin Income Tax Expense Amount ValuationAllowanceDeferredTaxAssetIncreaseDecreaseNotRecognizedinIncomeTaxExpenseAmount	-12461000	usd
CY2020	amr	Valuation Allowance Deferred Tax Asset Increase Decrease Not Recognizedin Income Tax Expense Amount ValuationAllowanceDeferredTaxAssetIncreaseDecreaseNotRecognizedinIncomeTaxExpenseAmount	12538000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	53801000	usd
CY2021Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	172883000	usd
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	263387000	usd
CY2022Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	1139000000	usd
CY2022Q4	amr	Operating Loss Carryforwards Availablefor Use OperatingLossCarryforwardsAvailableforUse	1007000000	usd
CY2022Q4	amr	Operating Loss Carryforwards Section382 Limitation One OperatingLossCarryforwardsSection382LimitationOne	1000000	usd
CY2022Q4	amr	Operating Loss Carryforwards Amount Subjectto Section382 Limitations Two OperatingLossCarryforwardsAmountSubjecttoSection382LimitationsTwo	132000000	usd
CY2022Q4	amr	Operating Loss Carryforwards Section382 Limitations Three OperatingLossCarryforwardsSection382LimitationsThree	17500000	usd
CY2020Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	20788000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	20788000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	usd
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	20788000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	usd
CY2019	amr	Defined Benefit Plan Numberof Plans Amended DefinedBenefitPlanNumberofPlansAmended	2	plan
CY2022Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	11651000	usd
CY2021Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	13312000	usd
CY2022Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	107028000	usd
CY2021Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	124693000	usd
CY2022Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	118679000	usd
CY2021Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	138005000	usd
CY2022Q4	amr	Insurance Receivable For Workers Compensation InsuranceReceivableForWorkersCompensation	46866000	usd
CY2021Q4	amr	Insurance Receivable For Workers Compensation InsuranceReceivableForWorkersCompensation	53664000	usd
CY2022Q4	amr	Workers Compensation Liability Net WorkersCompensationLiabilityNet	71813000	usd
CY2021Q4	amr	Workers Compensation Liability Net WorkersCompensationLiabilityNet	84341000	usd
CY2021	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	10275000	usd
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	3613000	usd
CY2022Q3	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.02
CY2022	amr	Medical Self Insurance Period Expense MedicalSelfInsurancePeriodExpense	68706000	usd
CY2021	amr	Medical Self Insurance Period Expense MedicalSelfInsurancePeriodExpense	62351000	usd
CY2020	amr	Medical Self Insurance Period Expense MedicalSelfInsurancePeriodExpense	52517000	usd
CY2022Q4	amr	Sharebased Compensation Arrangementby Sharebased Payment Award Numberof Award Types SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofAwardTypes	4	award_type
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9841000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7468000	usd
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	5540000	usd
CY2022	us-gaap	Royalty Expense RoyaltyExpense	226366000	usd
CY2021	us-gaap	Royalty Expense RoyaltyExpense	113685000	usd
CY2020	us-gaap	Royalty Expense RoyaltyExpense	67992000	usd
CY2022Q4	us-gaap	Restricted Cash RestrictedCash	53488000	usd
CY2021Q4	us-gaap	Restricted Cash RestrictedCash	101403000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	24547000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	11977000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	28941000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	89426000	usd
CY2022Q4	us-gaap	Restricted Investments RestrictedInvestments	105735000	usd
CY2021Q4	us-gaap	Restricted Investments RestrictedInvestments	30949000	usd
CY2022Q4	us-gaap	Deposit Assets DepositAssets	86111000	usd
CY2021Q4	us-gaap	Deposit Assets DepositAssets	1796000	usd
CY2022Q4	amr	Deposits Dividends DepositsDividends	84748000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4092987000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2252624000	usd
CY2020	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1413124000	usd
CY2022	us-gaap	Revenues Revenues	4101592000	usd
CY2021	us-gaap	Revenues Revenues	2258686000	usd
CY2020	us-gaap	Revenues Revenues	1416187000	usd
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2022	us-gaap	Revenues Revenues	4101592000	usd
CY2022	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	107620000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19498000	usd
CY2022	amr	Adjusted Earnings Before Income Tax Interest Depreciation And Amortization AdjustedEarningsBeforeIncomeTaxInterestDepreciationAndAmortization	1740612000	usd
CY2022	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	164309000	usd
CY2021	us-gaap	Revenues Revenues	2258686000	usd
CY2021	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	110047000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13244000	usd
CY2021	amr	Adjusted Earnings Before Income Tax Interest Depreciation And Amortization AdjustedEarningsBeforeIncomeTaxInterestDepreciationAndAmortization	534481000	usd
CY2021	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	83300000	usd
CY2020	us-gaap	Revenues Revenues	1416187000	usd
CY2020	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	139885000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9214000	usd
CY2020	amr	Adjusted Earnings Before Income Tax Interest Depreciation And Amortization AdjustedEarningsBeforeIncomeTaxInterestDepreciationAndAmortization	83401000	usd
CY2020	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	119579000	usd
CY2022	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	1448545000	usd
CY2022	us-gaap	Interest Expense InterestExpense	21802000	usd
CY2022	us-gaap	Investment Income Interest InvestmentIncomeInterest	3187000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	106205000	usd
CY2022	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	107620000	usd
CY2022	amr	Noncash Allocated Sharebased Compensation Expense NoncashAllocatedSharebasedCompensationExpense	7484000	usd
CY2022	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	-8880000	usd
CY2022	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	23765000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	19498000	usd
CY2022	amr	Adjusted Earnings Before Income Tax Interest Depreciation And Amortization AdjustedEarningsBeforeIncomeTaxInterestDepreciationAndAmortization	1740612000	usd
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	288790000	usd
CY2021	us-gaap	Interest Expense InterestExpense	69654000	usd
CY2021	us-gaap	Investment Income Interest InvestmentIncomeInterest	336000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3408000	usd
CY2021	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	110047000	usd
CY2021	amr	Noncash Allocated Sharebased Compensation Expense NoncashAllocatedSharebasedCompensationExpense	5315000	usd
CY2021	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	-19525000	usd
CY2021	amr	Gain Loss On Settlement Of Acquisition Related Obligations GainLossOnSettlementOfAcquisitionRelatedObligations	1125000	usd
CY2021	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	26520000	usd
CY2021	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	-561000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	13244000	usd
CY2021	amr	Adjusted Earnings Before Income Tax Interest Depreciation And Amortization AdjustedEarningsBeforeIncomeTaxInterestDepreciationAndAmortization	534481000	usd
CY2020	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	-241470000	usd
CY2020	us-gaap	Interest Expense InterestExpense	74528000	usd
CY2020	us-gaap	Investment Income Interest InvestmentIncomeInterest	7027000	usd
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2164000	usd
CY2020	amr	Depreciation Depletion And Amortization Excluding Acquired Intangibles DepreciationDepletionAndAmortizationExcludingAcquiredIntangibles	139885000	usd
CY2020	amr	Noncash Allocated Sharebased Compensation Expense NoncashAllocatedSharebasedCompensationExpense	4896000	usd
CY2020	amr	Acquisition Related Obligations Changesin Fair Value Gain Loss AcquisitionRelatedObligationsChangesinFairValueGainLoss	8750000	usd
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	26504000	usd
CY2020	us-gaap	Restructuring Costs And Asset Impairment Charges RestructuringCostsAndAssetImpairmentCharges	83878000	usd
CY2020	amr	Defined Benefit Planand Other Benefit Plan Settlement Gain Loss DefinedBenefitPlanandOtherBenefitPlanSettlementGainLoss	-2966000	usd
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	9214000	usd
CY2020	amr	Adjusted Earnings Before Income Tax Interest Depreciation And Amortization AdjustedEarningsBeforeIncomeTaxInterestDepreciationAndAmortization	83401000	usd
CY2022Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.418

Files In Submission

Name	View Source	Status
amr-20221231_pre.xml	Edgar Link	unprocessable
amr-20221231_cal.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
0001704715-23-000010-index-headers.html	Edgar Link	pending
0001704715-23-000010-index.html	Edgar Link	pending
0001704715-23-000010.txt	Edgar Link	pending
0001704715-23-000010-xbrl.zip	Edgar Link	pending
a12312022exhibit1024.htm	Edgar Link	pending
a12312022exhibit1025.htm	Edgar Link	pending
a12312022exhibit211.htm	Edgar Link	pending
a12312022exhibit231.htm	Edgar Link	pending
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a12312022exhibit32.htm	Edgar Link	pending
a12312022exhibit41.htm	Edgar Link	pending
a12312022exhibit95.htm	Edgar Link	pending
amr-20221231.htm	Edgar Link	pending
amr-20221231.xsd	Edgar Link	pending
amr-20221231_g1.jpg	Edgar Link	pending
amr-20221231_g2.jpg	Edgar Link	pending
amr-20221231_lab.xml	Edgar Link	unprocessable
amr-20221231_def.xml	Edgar Link	unprocessable
amr-20221231_htm.xml	Edgar Link	completed
finalaracomatswithappend.htm	Edgar Link	pending
finalaracomatswithappend001.jpg	Edgar Link	pending
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$AMR
Alpha Metallurgical Resources, Inc. Stock $amr

2023 Q1 Form 10-K Financial Statement

#000170471523000010 Filed on February 23, 2023

Income Statement

Balance Sheet

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$AMR Alpha Metallurgical Resources, Inc. Stock $amr

2023 Q1 Form 10-K Financial Statement

#000170471523000010 Filed on February 23, 2023

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMR
Alpha Metallurgical Resources, Inc. Stock $amr