$HCC
WARRIOR MET COAL, INC. Stock $hcc

$hcc Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000169130321000010 Filed on February 24, 2021

Income Statement

Concept	2020 Q4	2020 Q3	2020 Q2
Revenue	$212.3M	$180.1M	$163.7M
YoY Change	3.59%	-37.37%	-58.83%
Cost Of Revenue	$203.0M	$151.4M	$130.8M
YoY Change	36.06%	-20.42%	-36.26%
Gross Profit	$9.275M	$21.63M	$25.28M
YoY Change	-83.35%	-75.89%	-86.29%
Gross Profit Margin	4.37%	12.01%	15.44%
Selling, General & Admin	$7.800M	$8.192M	$8.457M
YoY Change	-2.5%	-12.5%	-21.57%
% of Gross Profit	84.1%	37.87%	33.45%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$39.30M	$27.97M	$22.16M
YoY Change	66.53%	8.64%	-13.72%
% of Gross Profit	423.72%	129.29%	87.64%
Operating Expenses	$47.00M	$8.192M	$8.457M
YoY Change	48.73%	-12.5%	-21.57%
Operating Profit	-$37.78M	-$14.53M	-$5.331M
YoY Change	-256.94%	-126.61%	-103.6%
Interest Expense	-$8.500M	-$8.059M	-$8.255M
YoY Change	30.77%	11.16%	18.76%
% of Operating Profit
Other Income/Expense, Net		$0.00	$0.00
YoY Change
Pretax Income	-$44.50M	-$22.59M	-$13.59M
YoY Change	-354.29%	-142.92%	-108.57%
Income Tax	-$10.80M	-$8.152M	-$4.425M
% Of Pretax Income
Net Earnings	-$33.71M	-$14.43M	-$9.161M
YoY Change	-262.45%	-132.06%	-107.3%
Net Earnings / Revenue	-15.88%	-8.02%	-5.6%
Basic Earnings Per Share	-$0.66	-$0.28	-$0.18
Diluted Earnings Per Share	-$0.66	-$0.28	-$0.18
COMMON SHARES
Basic Shares Outstanding	51.19M shares	51.19M shares	51.19M shares
Diluted Shares Outstanding		51.19M shares	51.19M shares

Balance Sheet

Concept	2020 Q4	2020 Q3	2020 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$220.4M	$224.9M	$229.2M
YoY Change	5.91%	-3.39%	71.56%
Cash & Equivalents	$211.9M	$216.4M	$220.7M
Short-Term Investments	$8.500M	$8.500M	$8.500M
Other Short-Term Assets	$39.90M	$40.00M	$35.00M
YoY Change	66.95%	43.37%	32.08%
Inventory	$118.7M	$155.7M	$153.9M
Prepaid Expenses	$45.05M	$40.02M	$34.97M
Receivables	$83.30M	$81.42M	$77.01M
Other Receivables	$5.142M	$0.00	$24.30M
Total Short-Term Assets	$467.5M	$502.0M	$519.3M
YoY Change	5.28%	8.46%	29.58%
LONG-TERM ASSETS
Property, Plant & Equipment	$637.1M	$607.4M	$602.0M
YoY Change	5.1%	2.91%	3.34%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$14.12M	$15.15M	$15.34M
YoY Change	-22.61%	-21.68%	-22.16%
Total Long-Term Assets	$926.5M	$889.0M	$877.9M
YoY Change	2.91%	0.26%	-1.33%
TOTAL ASSETS
Total Short-Term Assets	$467.5M	$502.0M	$519.3M
Total Long-Term Assets	$926.5M	$889.0M	$877.9M
Total Assets	$1.394B	$1.391B	$1.397B
YoY Change	3.7%	3.07%	8.27%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$59.11M	$50.00M	$55.81M
YoY Change	27.29%	-1.61%	53.03%
Accrued Expenses	$86.11M	$67.52M	$60.34M
YoY Change	30.95%	-20.02%	-14.7%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00	$0.00	$0.00
YoY Change
Total Short-Term Liabilities	$170.3M	$139.3M	$131.1M
YoY Change	32.08%	-7.26%	8.16%
LONG-TERM LIABILITIES
Long-Term Debt	$379.9M	$379.7M	$379.5M
YoY Change	12.0%	12.01%	12.01%
Other Long-Term Liabilities	$2.258M	$32.28M	$31.82M
YoY Change	88.64%	22.47%	21.51%
Total Long-Term Liabilities	$382.2M	$412.0M	$411.4M
YoY Change	12.27%	12.76%	12.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$170.3M	$139.3M	$131.1M
Total Long-Term Liabilities	$382.2M	$412.0M	$411.4M
Total Liabilities	$668.7M	$631.3M	$622.2M
YoY Change	15.55%	4.58%	7.69%
SHAREHOLDERS EQUITY
Retained Earnings	$525.5M	$561.8M	$578.9M
YoY Change	-8.07%	1.5%	13.26%
Common Stock	$534.0K	$533.0K	$533.0K
YoY Change	0.19%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$50.58M	$50.58M	$50.58M
YoY Change	0.0%	0.0%	26.44%
Treasury Stock Shares	2.222M shares	2.222M shares	2.222B shares
Shareholders Equity	$725.2M	$759.7M	$775.0M
YoY Change
Total Liabilities & Shareholders Equity	$1.394B	$1.391B	$1.397B
YoY Change	3.7%	3.07%	8.27%

Cashflow Statement

Concept	2020 Q4	2020 Q3	2020 Q2
OPERATING ACTIVITIES
Net Income	-$33.71M	-$14.43M	-$9.161M
YoY Change	-262.45%	-132.06%	-107.3%
Depreciation, Depletion And Amortization	$39.30M	$27.97M	$22.16M
YoY Change	66.53%	8.64%	-13.72%
Cash From Operating Activities	$30.40M	$29.20M	$32.00M
YoY Change	24.08%	-80.6%	-86.17%
INVESTING ACTIVITIES
Capital Expenditures	-$29.30M	$23.31M	$25.98M
YoY Change	-13.57%	-11.27%	-6.23%
Acquisitions
YoY Change
Other Investing Activities	$200.0K	$0.00	$0.00
YoY Change		-100.0%	-100.0%
Cash From Investing Activities	-$29.10M	-$27.80M	-$31.10M
YoY Change	-14.16%	-34.43%	10.28%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-5.900M	-5.500M	-37.10M
YoY Change	-11.94%	-70.59%	-84.47%
NET CHANGE
Cash From Operating Activities	30.40M	29.20M	32.00M
Cash From Investing Activities	-29.10M	-27.80M	-31.10M
Cash From Financing Activities	-5.900M	-5.500M	-37.10M
Net Change In Cash	-4.600M	-4.100M	-36.20M
YoY Change	-71.43%	-104.59%	1.4%
FREE CASH FLOW
Cash From Operating Activities	$30.40M	$29.20M	$32.00M
Capital Expenditures	-$29.30M	$23.31M	$25.98M
Free Cash Flow	$59.70M	$5.895M	$6.021M
YoY Change	2.23%	-95.25%	-97.04%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2020Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y6M25D
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-38061
CY2020	dei	Entity Registrant Name EntityRegistrantName	Warrior Met Coal, Inc.
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	81-0706839
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	16243 Highway 216
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Brookwood
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	AL
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	35444
CY2020	dei	City Area Code CityAreaCode	205
CY2020	dei	Local Phone Number LocalPhoneNumber	554-6150
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CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51493000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	52918000	shares
CY2020	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.20
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52812000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51168000	shares
CY2019	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	4.61
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	6.73
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	413023000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	696787000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	6.73
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	360635000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	6405000	USD
CY2018	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	38030000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Other AdjustmentsToAdditionalPaidInCapitalOther	-4938000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	712612000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	301699000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-20075000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	68483000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-35761000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	301699000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	696787000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	118092000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	97330000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	97209000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-223038000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	7602000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	5820000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	6405000	USD
CY2020	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1546000	USD
CY2019	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1361000	USD
CY2018	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	2486000	USD
CY2020	hcc	Asset Retirement Obligation Revision Of Estimate Adjustment To Earnings Net Of Accretion Expense AssetRetirementObligationRevisionOfEstimateAdjustmentToEarningsNetOfAccretionExpense	2631000	USD
CY2019	hcc	Asset Retirement Obligation Revision Of Estimate Adjustment To Earnings Net Of Accretion Expense AssetRetirementObligationRevisionOfEstimateAdjustmentToEarningsNetOfAccretionExpense	-7891000	USD
CY2018	hcc	Asset Retirement Obligation Revision Of Estimate Adjustment To Earnings Net Of Accretion Expense AssetRetirementObligationRevisionOfEstimateAdjustmentToEarningsNetOfAccretionExpense	-19942000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9756000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-16173000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-38928000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	20653000	USD
CY2020	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	3308000	USD
CY2019	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	224000	USD
CY2018	us-gaap	Increase Decrease In Other Receivables IncreaseDecreaseInOtherReceivables	-3872000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	2928000	USD
CY2020	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-24274000	USD
CY2019	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	-21795000	USD
CY2018	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	12431000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	13465000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	30491000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	1812000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	16066000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-4088000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1444000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	15361000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	13409000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	5060000	USD
CY2020	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-3936000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-17317000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	13835000	USD
CY2020	hcc	Increase Decrease In Income Taxes Receivable Noncurrent IncreaseDecreaseInIncomeTaxesReceivableNoncurrent	0	USD
CY2019	hcc	Increase Decrease In Income Taxes Receivable Noncurrent IncreaseDecreaseInIncomeTaxesReceivableNoncurrent	0	USD
CY2018	hcc	Increase Decrease In Income Taxes Receivable Noncurrent IncreaseDecreaseInIncomeTaxesReceivableNoncurrent	-17945000	USD
CY2020	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	19558000	USD
CY2019	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	26068000	USD
CY2018	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-7771000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	112626000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	532814000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	559396000	USD
CY2020	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	87488000	USD
CY2019	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	107278000	USD
CY2018	us-gaap	Payments To Acquire Other Property Plant And Equipment PaymentsToAcquireOtherPropertyPlantAndEquipment	101620000	USD
CY2020	us-gaap	Payments To Acquire Mining Assets PaymentsToAcquireMiningAssets	27093000	USD
CY2019	us-gaap	Payments To Acquire Mining Assets PaymentsToAcquireMiningAssets	23392000	USD
CY2018	us-gaap	Payments To Acquire Mining Assets PaymentsToAcquireMiningAssets	8937000	USD
CY2020	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	159000	USD
CY2019	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	3127000	USD
CY2020	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1272000	USD
CY2020	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	14733000	USD
CY2019	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	17501000	USD
CY2018	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	0	USD
CY2020	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	8500000	USD
CY2019	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	24171000	USD
CY2018	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-108189000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-134213000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-107629000	USD
CY2020	us-gaap	Payments Of Dividends PaymentsOfDividends	10395000	USD
CY2019	us-gaap	Payments Of Dividends PaymentsOfDividends	240394000	USD
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	360635000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	128750000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	70000000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	30000000	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	140272000	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3060000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	14237000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	17273000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3713000	USD
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	12546000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	38030000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1138000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-4938000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	14096000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-411623000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-281626000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	18533000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-13022000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	170141000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	193383000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	206405000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	36264000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	211916000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	193383000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	206405000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	30523000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	33544000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	30237000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	69000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	85000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	3000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	18967000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	45523000	USD
CY2018	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	6822000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	<span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Use of Estimates</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%"> </span>The Company prepares its financial statements in conformity with GAAP, which requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the periods presented. Due to the inherent uncertainty involved in making estimates, actual results could differ from those estimates.
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Concentrations of Credit Risk and Major Customers The Company’s principal line of business is mining and marketing met coal to foreign steel producers.
CY2020	us-gaap	Depletion Depletion	9300000	USD
CY2019	us-gaap	Depletion Depletion	9900000	USD
CY2018	us-gaap	Depletion Depletion	9600000	USD
CY2020Q4	us-gaap	Mineral Properties Gross MineralPropertiesGross	144200000	USD
CY2020Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	86272000	USD
CY2019Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	69064000	USD
CY2020Q4	hcc	Inventory Raw Materials Purchased Parts Suppliesand Other Netof Reserve InventoryRawMaterialsPurchasedPartsSuppliesandOtherNetofReserve	32441000	USD
CY2019Q4	hcc	Inventory Raw Materials Purchased Parts Suppliesand Other Netof Reserve InventoryRawMaterialsPurchasedPartsSuppliesandOtherNetofReserve	28837000	USD
CY2020Q4	us-gaap	Inventory Net InventoryNet	118713000	USD
CY2019Q4	us-gaap	Inventory Net InventoryNet	97901000	USD
CY2020Q4	hcc	Deferred Moving Costs Current DeferredMovingCostsCurrent	22972000	USD
CY2019Q4	hcc	Deferred Moving Costs Current DeferredMovingCostsCurrent	15621000	USD
CY2020Q4	us-gaap	Prepaid Insurance PrepaidInsurance	3832000	USD
CY2019Q4	us-gaap	Prepaid Insurance PrepaidInsurance	3631000	USD
CY2020Q4	hcc	Prepaid Deposits Current PrepaidDepositsCurrent	6937000	USD
CY2019Q4	hcc	Prepaid Deposits Current PrepaidDepositsCurrent	345000	USD
CY2020Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	6169000	USD
CY2019Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	4247000	USD
CY2020Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	39910000	USD
CY2019Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	23844000	USD
CY2019Q4	us-gaap	Mineral Properties Gross MineralPropertiesGross	144200000	USD
CY2020Q4	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	43400000	USD
CY2019Q4	us-gaap	Mineral Properties Accumulated Depletion MineralPropertiesAccumulatedDepletion	34100000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	56528000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Before Accumulated Amortization FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization	44996000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	1015647000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Before Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization	879739000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	378539000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization	273539000	USD
CY2020Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	637108000	USD
CY2019Q4	us-gaap	Property Plant And Equipment And Finance Lease Right Of Use Asset After Accumulated Depreciation And Amortization PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	606200000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	118100000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	97300000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	97200000	USD
CY2020Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	7305000	USD
CY2019Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	8976000	USD
CY2020Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	2667000	USD
CY2019Q4	us-gaap	Debt Issuance Costs Line Of Credit Arrangements Net DebtIssuanceCostsLineOfCreditArrangementsNet	2723000	USD
CY2020Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	4146000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	6543000	USD
CY2020Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	14118000	USD
CY2019Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	18242000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	24300000	USD
CY2020Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	0	USD
CY2020Q4	us-gaap	Income Taxes Receivable Noncurrent IncomeTaxesReceivableNoncurrent	0	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-74000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-3151000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2776000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	85000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	0	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-69000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-3066000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-2776000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-16731000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	53677000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	65417000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-176141000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-3344000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	14806000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-46897000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-20075000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	68483000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-223038000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-20144000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-225814000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-20100000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.360
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-55905000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	367116000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	470973000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-11740000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	98637000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-2775000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	77094000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	98904000	USD
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-1504000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-16198000	USD
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-18227000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-2637000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	11747000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	14897000	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	0	USD
CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-312493000	USD
CY2020	hcc	Effective Income Tax Rate Reconciliation Nondeductible Transaction Expense Amount EffectiveIncomeTaxRateReconciliationNondeductibleTransactionExpenseAmount	0	USD
CY2019	hcc	Effective Income Tax Rate Reconciliation Nondeductible Transaction Expense Amount EffectiveIncomeTaxRateReconciliationNondeductibleTransactionExpenseAmount	0	USD
CY2018	hcc	Effective Income Tax Rate Reconciliation Nondeductible Transaction Expense Amount EffectiveIncomeTaxRateReconciliationNondeductibleTransactionExpenseAmount	566000	USD
CY2020	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2019	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-6615000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2020	hcc	Effective Income Tax Rate Reconciliation Irc Section451 Marginal Well Credit EffectiveIncomeTaxRateReconciliationIRCSection451MarginalWellCredit	3977000	USD
CY2019	hcc	Effective Income Tax Rate Reconciliation Irc Section451 Marginal Well Credit EffectiveIncomeTaxRateReconciliationIRCSection451MarginalWellCredit	0	USD
CY2018	hcc	Effective Income Tax Rate Reconciliation Irc Section451 Marginal Well Credit EffectiveIncomeTaxRateReconciliationIRCSection451MarginalWellCredit	4964000	USD
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-286000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-611000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1722000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-20144000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	65417000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-225814000	USD
CY2020Q4	us-gaap	Increase Decrease In Income Taxes Receivable IncreaseDecreaseInIncomeTaxesReceivable	6600000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	253756000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	215805000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	457000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	15547000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	14115000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	9275000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	8168000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	4303000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	5597000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3614000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3649000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	286495000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	247791000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	558000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	0	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	10470000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	8514000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	82539000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2458000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	2441000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	112123000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	93494000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	174372000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	154297000	USD
CY2020	hcc	Effective Income Tax Rate Reconciliation Irc Section451 Marginal Well Credit EffectiveIncomeTaxRateReconciliationIRCSection451MarginalWellCredit	4000000.0	USD
CY2020Q1	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	31.00
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	312493000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	56206000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	4400000	USD
CY2020Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	57600000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	56206000	USD
CY2018Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	61824000	USD
CY2020	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3004000	USD
CY2019	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	3169000	USD
CY2020	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	2973000	USD
CY2019	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-7825000	USD
CY2020	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	276000	USD
CY2019	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	962000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	61907000	USD
CY2020Q4	us-gaap	Asset Retirement Obligation Legally Restricted Assets Fair Value AssetRetirementObligationLegallyRestrictedAssetsFairValue	0	USD
CY2020	hcc	Asset Retirement Obligation Revision Of Estimate Adjustment To Earnings AssetRetirementObligationRevisionOfEstimateAdjustmentToEarnings	400000	USD
CY2020	hcc	Asset Retirement Obligation Revision Of Estimate Adjustment To Earnings Per Share AssetRetirementObligationRevisionOfEstimateAdjustmentToEarningsPerShare	0.01
CY2019	hcc	Asset Retirement Obligation Revision Of Estimate Adjustment To Earnings AssetRetirementObligationRevisionOfEstimateAdjustmentToEarnings	11100000	USD
CY2019	hcc	Asset Retirement Obligation Revision Of Estimate Adjustment To Earnings Per Share AssetRetirementObligationRevisionOfEstimateAdjustmentToEarningsPerShare	0.22
CY2020Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	25539000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	38680000	USD
CY2020Q4	hcc	Accrued Operating Expenses Current AccruedOperatingExpensesCurrent	46285000	USD
CY2019Q4	hcc	Accrued Operating Expenses Current AccruedOperatingExpensesCurrent	14014000	USD
CY2020Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	3484000	USD
CY2019Q4	us-gaap	Accrued Royalties Current AccruedRoyaltiesCurrent	3304000	USD
CY2020Q4	hcc	Accrued Freight Current AccruedFreightCurrent	2724000	USD
CY2019Q4	hcc	Accrued Freight Current AccruedFreightCurrent	1971000	USD
CY2020Q4	us-gaap	Interest Payable Current InterestPayableCurrent	4981000	USD
CY2019Q4	us-gaap	Interest Payable Current InterestPayableCurrent	4635000	USD
CY2020Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	3095000	USD
CY2019Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	3151000	USD
CY2020Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	86108000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	65755000	USD
CY2020Q2	hcc	Self Insurance Reserve Deductible Amount Per Claim SelfInsuranceReserveDeductibleAmountPerClaim	500000	USD
CY2020Q4	hcc	Self Insurance Reserve Deductible Amount Per Claim SelfInsuranceReserveDeductibleAmountPerClaim	1000000.0	USD
CY2016Q2	hcc	Held To Maturity Securities Held As Collateral HeldToMaturitySecuritiesHeldAsCollateral	17000000.0	USD
CY2020Q1	hcc	Held To Maturity Securities Held As Collateral Increase In Collateral HeldToMaturitySecuritiesHeldAsCollateralIncreaseInCollateral	39800000	USD
CY2020	hcc	Held To Maturityof Surety Bonds HeldToMaturityofSuretyBonds	17000000.0	USD
CY2020	hcc	Held To Maturityof Shortterm Investments Held As Collateral HeldToMaturityofShorttermInvestmentsHeldAsCollateral	8500000	USD
CY2019	hcc	Held To Maturityof Surety Bonds HeldToMaturityofSuretyBonds	17000000.0	USD
CY2019	hcc	Held To Maturityof Shortterm Investments Held As Collateral HeldToMaturityofShorttermInvestmentsHeldAsCollateral	14500000	USD
CY2020Q4	hcc	Assets Held In Trust Self Insurance Reserve Noncurrent AssetsHeldInTrustSelfInsuranceReserveNoncurrent	3000000.0	USD
CY2019Q4	hcc	Assets Held In Trust Self Insurance Reserve Noncurrent AssetsHeldInTrustSelfInsuranceReserveNoncurrent	3300000	USD
CY2020Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	36900000	USD
CY2020Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	2400000	USD
CY2020Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	34600000	USD
CY2019Q4	us-gaap	Self Insurance Reserve SelfInsuranceReserve	32500000	USD
CY2019Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	2300000	USD
CY2019Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	30200000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	3527000	USD
CY2019Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	4246000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	379908000	USD
CY2020Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	379908000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	339189000	USD
CY2020Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	339189000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	0	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	40000000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	343435000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	0	USD
CY2019Q1	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	299401000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9800000	USD
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	46746000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	40227000	USD
CY2020Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	14385000	USD
CY2019Q4	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	10146000	USD
CY2020Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	24091000	USD
CY2019Q4	us-gaap	Finance Lease Liability Noncurrent FinanceLeaseLiabilityNoncurrent	25528000	USD
CY2020Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	38476000	USD
CY2019Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	35674000	USD
CY2020Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0577
CY2019Q4	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0602
CY2020Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	9800000	USD
CY2019Q4	us-gaap	Finance Lease Right Of Use Asset Accumulated Amortization FinanceLeaseRightOfUseAssetAccumulatedAmortization	4800000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	45523000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	2980000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	2527000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	12730000	USD
CY2019	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	11202000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1988000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1761000	USD
CY2020	us-gaap	Lease Cost LeaseCost	17698000	USD
CY2019	us-gaap	Lease Cost LeaseCost	15490000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	16276000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	12555000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	10774000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	2557000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	732000	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q4	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	42894000	USD
CY2020Q4	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	4418000	USD
CY2020Q4	hcc	Finance Lease Excluding Leases Not Yet Commenced Liability FinanceLeaseExcludingLeasesNotYetCommencedLiability	38476000	USD
CY2020Q4	hcc	Lessee Finance Lease Lease Not Yet Commenced LesseeFinanceLeaseLeaseNotYetCommenced	1600000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1988000	USD
CY2019	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	1761000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	14237000	USD
CY2019	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	17273000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Finance Lease Liability RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability	18967000	USD
CY2020Q4	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	1700000	USD
CY2020Q1	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	1800000	USD
CY2020Q4	hcc	Lessee Finance Lease Lease Not Yet Commenced LesseeFinanceLeaseLeaseNotYetCommenced	1600000	USD
CY2019	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	22800000	USD
CY2020	us-gaap	Royalty Expense RoyaltyExpense	49500000	USD
CY2019	us-gaap	Royalty Expense RoyaltyExpense	87300000	USD
CY2018	us-gaap	Royalty Expense RoyaltyExpense	101000000.0	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.70
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-35761000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	301699000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	696787000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51168000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	51363000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	52812000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	130000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	106000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51168000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	51493000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	52918000	shares
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	5.87
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	13.19
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.70
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	5.86
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	13.17
CY2017Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.05
	hcc	Common Stock Dividends Per Share Declared Quarterly CommonStockDividendsPerShareDeclaredQuarterly	0.05
	us-gaap	Payments Of Dividends PaymentsOfDividends	39500000	USD
CY2019Q2	hcc	Common Stock Special Cash Dividend Per Share Declared CommonStockSpecialCashDividendPerShareDeclared	4.41
CY2019Q2	us-gaap	Dividends Cash DividendsCash	230000000.0	USD
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2020	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	782738000	USD
CY2019	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1268309000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	1378007000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	87488000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	107278000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	101620000	USD
CY2020	hcc	Net Income Lossbefore Interest Taxes Depreciationand Amortization NetIncomeLossbeforeInterestTaxesDepreciationandAmortization	136701000	USD
CY2019	hcc	Net Income Lossbefore Interest Taxes Depreciationand Amortization NetIncomeLossbeforeInterestTaxesDepreciationandAmortization	515253000	USD
CY2018	hcc	Net Income Lossbefore Interest Taxes Depreciationand Amortization NetIncomeLossbeforeInterestTaxesDepreciationandAmortization	626038000	USD
CY2020	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	33736000	USD
CY2019	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	29828000	USD
CY2018	us-gaap	Other Cost Of Operating Revenue OtherCostOfOperatingRevenue	10172000	USD
CY2020	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	118092000	USD
CY2020	us-gaap	Other Income OtherIncome	3544000	USD
CY2019	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	97330000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	97209000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	32879000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	37014000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	36626000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	9068000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9756000	USD
CY2018	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2019	us-gaap	Other Income OtherIncome	22815000	USD
CY2018	us-gaap	Other Income OtherIncome	0	USD
CY2020	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-32310000	USD
CY2019	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-29335000	USD
CY2018	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-37314000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-20144000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	65417000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-225814000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	-35761000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	301699000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	696787000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	226720000	USD
CY2020Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	163701000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	180064000	USD
CY2020Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	212253000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	67645000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	25282000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	21630000	USD
CY2020Q4	us-gaap	Gross Profit GrossProfit	9275000	USD
CY2020Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	30497000	USD
CY2020Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-5331000	USD
CY2020Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-14527000	USD
CY2020Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-37778000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	21545000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-9161000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	-14434000	USD
CY2020Q4	us-gaap	Net Income Loss NetIncomeLoss	-33711000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.18
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.28
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.66
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.18
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.28
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.66
CY2019Q1	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	378290000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	397613000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	287506000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	204901000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	187917000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	184406000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	89702000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	55713000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	156779000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	147945000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	54599000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	24071000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	110447000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	125481000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	45022000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	20751000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.14
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.43
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.41
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.14
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.43
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.87
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.41
CY2020Q1	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	1800000	USD
CY2020Q4	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	1700000	USD
CY2019Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-9800000	USD
CY2019Q2	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	17500000	USD
CY2019Q3	us-gaap	Litigation Settlement Amount Awarded From Other Party LitigationSettlementAmountAwardedFromOtherParty	5300000	USD
CY2019Q4	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-7800000	USD

Files In Submission

Name	View Source	Status
0001691303-21-000010-index-headers.html	Edgar Link	pending
0001691303-21-000010-index.html	Edgar Link	pending
0001691303-21-000010.txt	Edgar Link	pending
0001691303-21-000010-xbrl.zip	Edgar Link	pending
exhibit211-123120.htm	Edgar Link	pending
exhibit231-123120.htm	Edgar Link	pending
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exhibit95-123120.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
hcc-20201231.htm	Edgar Link	pending
hcc-20201231.xsd	Edgar Link	pending
hcc-20201231_cal.xml	Edgar Link	unprocessable
hcc-20201231_def.xml	Edgar Link	unprocessable
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hcc-20201231_htm.xml	Edgar Link	completed
hcc-20201231_lab.xml	Edgar Link	unprocessable
hcc-20201231_pre.xml	Edgar Link	unprocessable
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$HCC
WARRIOR MET COAL, INC. Stock $hcc

2020 Q4 Form 10-K Financial Statement

#000169130321000010 Filed on February 24, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HCC WARRIOR MET COAL, INC. Stock $hcc

2020 Q4 Form 10-K Financial Statement

#000169130321000010 Filed on February 24, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HCC
WARRIOR MET COAL, INC. Stock $hcc