$ARCH
ARCH RESOURCES, INC. Stock $arch

$arch Overview Financials Valuation SEC Filings Company Website

2018 Q1 Form 10-Q Financial Statement

#000162828018005094 Filed on April 26, 2018

Income Statement

Concept	2018 Q1	2017 Q1
Revenue	$575.3M	$601.0M
YoY Change	-4.27%	40.38%
Cost Of Revenue	$454.8M	$460.5M
YoY Change	-1.23%	9.81%
Gross Profit	$81.20M	$86.71M
YoY Change	-6.35%	-154.74%
Gross Profit Margin	14.11%	14.43%
Selling, General & Admin	$25.95M	$20.76M
YoY Change	24.98%	4.72%
% of Gross Profit	31.96%	23.95%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$29.70M	$31.92M
YoY Change	-6.95%	-49.89%
% of Gross Profit	36.58%	36.81%
Operating Expenses	$510.1M	$534.0M
YoY Change	-4.47%	-8.96%
Operating Profit	$65.17M	$66.99M
YoY Change	-2.71%	-133.21%
Interest Expense	$5.395M	$9.425M
YoY Change	-42.76%	-78.8%
% of Operating Profit	8.28%	14.07%
Other Income/Expense, Net	-$1.604M	-$5.579M
YoY Change	-71.25%	-8.36%
Pretax Income	$59.44M	$52.51M
YoY Change	13.2%	-125.27%
Income Tax	-$544.0K	$840.0K
% Of Pretax Income	-0.92%	1.6%
Net Earnings	$59.99M	$51.67M
YoY Change	16.1%	-125.0%
Net Earnings / Revenue	10.43%	8.6%
Basic Earnings Per Share	$2.87	$2.07
Diluted Earnings Per Share	$2.74	$2.03
COMMON SHARES
Basic Shares Outstanding	20.90M shares	25.01M shares
Diluted Shares Outstanding	21.88M shares	25.41M shares

Balance Sheet

Concept	2018 Q1	2017 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments	$433.0M	$470.1M
YoY Change	-7.89%	-20.89%
Cash & Equivalents	$288.3M	$347.6M
Short-Term Investments	$144.7M	$122.5M
Other Short-Term Assets	$68.46M	$74.06M
YoY Change	-7.57%	65.21%
Inventory	$143.8M	$125.2M
Prepaid Expenses
Receivables	$208.1M	$150.4M
Other Receivables	$12.00M	$23.00M
Total Short-Term Assets	$867.7M	$911.2M
YoY Change	-4.77%	-16.18%
LONG-TERM ASSETS
Property, Plant & Equipment	$935.5M	$1.027B
YoY Change	-8.93%	-70.54%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$104.8M	$104.1M
YoY Change	0.62%	-48.32%
Other Assets	$68.68M	$102.3M
YoY Change	-32.85%	74.36%
Total Long-Term Assets	$173.5M	$206.4M
YoY Change	-15.97%	-26.59%
TOTAL ASSETS
Total Short-Term Assets	$867.7M	$911.2M
Total Long-Term Assets	$173.5M	$206.4M
Total Assets	$1.977B	$2.145B
YoY Change	-7.84%	-55.82%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$127.1M	$103.1M
YoY Change	23.29%	45.62%
Accrued Expenses	$158.9M	$172.9M
YoY Change	-8.11%	68.53%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due	$14.00M	$8.000M
YoY Change	75.0%
Total Short-Term Liabilities	$300.4M	$283.9M
YoY Change	5.79%	63.73%
LONG-TERM LIABILITIES
Long-Term Debt	$307.7M	$318.0M
YoY Change	-3.23%
Other Long-Term Liabilities	$64.14M	$77.30M
YoY Change	-17.03%	328.9%
Total Long-Term Liabilities	$371.9M	$395.3M
YoY Change	-5.93%	2093.48%
TOTAL LIABILITIES
Total Short-Term Liabilities	$300.4M	$283.9M
Total Long-Term Liabilities	$371.9M	$395.3M
Total Liabilities	$1.288B	$1.343B
YoY Change	-4.09%	-78.69%
SHAREHOLDERS EQUITY
Retained Earnings	$298.7M	$85.12M
YoY Change	250.89%	-101.91%
Common Stock	$704.2M	$692.5M
YoY Change	1.69%	-77.35%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$340.7M
YoY Change
Treasury Stock Shares	4.384M shares
Shareholders Equity	$688.5M	$801.7M
YoY Change
Total Liabilities & Shareholders Equity	$1.977B	$2.145B
YoY Change	-7.84%	-55.82%

Cashflow Statement

Concept	2018 Q1	2017 Q1
OPERATING ACTIVITIES
Net Income	$59.99M	$51.67M
YoY Change	16.1%	-125.0%
Depreciation, Depletion And Amortization	$29.70M	$31.92M
YoY Change	-6.95%	-49.89%
Cash From Operating Activities	$66.87M	$125.5M
YoY Change	-46.73%	-1343.11%
INVESTING ACTIVITIES
Capital Expenditures	$9.453M	$5.950M
YoY Change	58.87%	0.4%
Acquisitions
YoY Change
Other Investing Activities	$11.00M	-$40.10M
YoY Change	-127.43%	201.5%
Cash From Investing Activities	$1.481M	-$46.14M
YoY Change	-103.21%	139.55%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$38.19M	$0.00
YoY Change
Debt Paid & Issued, Net	$0.00	$325.7M
YoY Change	-100.0%
Cash From Financing Activities	-$50.69M	-$39.25M
YoY Change	29.15%	50.82%
NET CHANGE
Cash From Operating Activities	$66.87M	$125.5M
Cash From Investing Activities	$1.481M	-$46.14M
Cash From Financing Activities	-$50.69M	-$39.25M
Net Change In Cash	$17.66M	$40.14M
YoY Change	-56.02%	-172.48%
FREE CASH FLOW
Cash From Operating Activities	$66.87M	$125.5M
Capital Expenditures	$9.453M	$5.950M
Free Cash Flow	$57.41M	$119.6M
YoY Change	-51.99%	-846.25%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017Q1	aci	Adjusted Ebitda AdjustedEBITDA	121219000	USD
CY2018Q1	aci	Adjusted Ebitda AdjustedEBITDA	104913000	USD
CY2017Q1	aci	Change In Fair Value Of Coal Derivatives And Coal Trading Activities Net ChangeInFairValueOfCoalDerivativesAndCoalTradingActivitiesNet	854000	USD
CY2018Q1	aci	Change In Fair Value Of Coal Derivatives And Coal Trading Activities Net ChangeInFairValueOfCoalDerivativesAndCoalTradingActivitiesNet	-3414000	USD
CY2017Q4	aci	Coal Supply Agreement Gross Obligation Liability CoalSupplyAgreementGrossObligationLiability	31742000	USD
CY2018Q1	aci	Coal Supply Agreement Gross Obligation Liability CoalSupplyAgreementGrossObligationLiability	31742000	USD
CY2017Q4	aci	Coal Supply Agreement Liability CoalSupplyAgreementLiability	934000	USD
CY2018Q1	aci	Coal Supply Agreement Liability CoalSupplyAgreementLiability	780000	USD
CY2017Q4	aci	Coal Supply Agreement Obligation Net CoalSupplyAgreementObligationNet	1763000	USD
CY2018Q1	aci	Coal Supply Agreement Obligation Net CoalSupplyAgreementObligationNet	1444000	USD
CY2017Q1	aci	Depreciation Depletionand Amortization Productionand Nonproduction DepreciationDepletionandAmortizationProductionandNonproduction	31921000	USD
CY2018Q1	aci	Depreciation Depletionand Amortization Productionand Nonproduction DepreciationDepletionandAmortizationProductionandNonproduction	29703000	USD
CY2017Q4	aci	Derivative Asset Excluding Interest Rate Swaps DerivativeAssetExcludingInterestRateSwaps	5508000	USD
CY2018Q1	aci	Derivative Asset Excluding Interest Rate Swaps DerivativeAssetExcludingInterestRateSwaps	7563000	USD
CY2017Q4	aci	Finite Lived Coal Supply Agreements Gross FiniteLivedCoalSupplyAgreementsGross	97196000	USD
CY2018Q1	aci	Finite Lived Coal Supply Agreements Gross FiniteLivedCoalSupplyAgreementsGross	97196000	USD
CY2017Q4	aci	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	29979000	USD
CY2018Q1	aci	Finite Lived Intangible Liabilities Accumulated Amortization FiniteLivedIntangibleLiabilitiesAccumulatedAmortization	30298000	USD
CY2017Q4	aci	Net Total Of Acquired Sales Contracts Assets NetTotalOfAcquiredSalesContractsAssets	10673000	USD
CY2018Q1	aci	Net Total Of Acquired Sales Contracts Assets NetTotalOfAcquiredSalesContractsAssets	7622000	USD
CY2017Q1	aci	Paymentsfor Reorganization Items PaymentsforReorganizationItems	3700000	USD
CY2018Q1	aci	Paymentsfor Reorganization Items PaymentsforReorganizationItems	200000	USD
CY2017Q1	aci	Proceedsfromconsiderationpaidfordisposalsanddivestitures Proceedsfromconsiderationpaidfordisposalsanddivestitures	420000	USD
CY2018Q1	aci	Proceedsfromconsiderationpaidfordisposalsanddivestitures Proceedsfromconsiderationpaidfordisposalsanddivestitures	54000	USD
CY2017Q1	aci	Purchases Of Investments Advances To Affiliates PurchasesOfInvestmentsAdvancesToAffiliates	7905000	USD
CY2018Q1	aci	Purchases Of Investments Advances To Affiliates PurchasesOfInvestmentsAdvancesToAffiliates	0	USD
CY2018Q1	aci	Revenue Remaining Performance Obligation Fixed Price Volume RevenueRemainingPerformanceObligationFixedPriceVolume	51400000
CY2018Q1	aci	Revenue Remaining Performance Obligation Fixed Price Volume RevenueRemainingPerformanceObligationFixedPriceVolume	48600000
CY2018Q1	aci	Revenue Remaining Performance Obligation Variable Price Volume RevenueRemainingPerformanceObligationVariablePriceVolume	4000000
CY2018Q1	aci	Revenue Remaining Performance Obligation Variable Price Volume RevenueRemainingPerformanceObligationVariablePriceVolume	6400000
CY2018Q1	dei	Amendment Flag AmendmentFlag	false
CY2018Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2018Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2017Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	700125000	USD
CY2018Q1	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	703980000	USD
CY2017Q1	us-gaap	Amortization Of Advance Royalty AmortizationOfAdvanceRoyalty	2281000	USD
CY2018Q1	us-gaap	Amortization Of Advance Royalty AmortizationOfAdvanceRoyalty	0	USD
CY2017Q1	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	535000	USD
CY2018Q1	us-gaap	Amortization Of Financing Costs And Discounts AmortizationOfFinancingCostsAndDiscounts	1080000	USD
CY2017Q1	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	7623000	USD
CY2018Q1	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	6992000	USD
CY2018Q1	dei	Document Period End Date DocumentPeriodEndDate	2018-03-31
CY2018Q1	dei	Document Type DocumentType	10-Q
CY2018Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001037676
CY2018Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	20614906	shares
CY2018Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018Q1	dei	Entity Registrant Name EntityRegistrantName	ARCH COAL INC
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	134137000	USD
CY2018Q1	us-gaap	Accounts Payable Current AccountsPayableCurrent	127149000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	172604000	USD
CY2018Q1	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	208100000	USD
CY2017Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	77017000	USD
CY2018Q1	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	76501000	USD
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	184161000	USD
CY2018Q1	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	158882000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	20367000	USD
CY2018Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	26266000	USD
CY2017Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	19840000	USD
CY2018Q1	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	19840000	USD
CY2017Q1	us-gaap	Assets Assets	2144916000	USD
CY2017Q4	us-gaap	Assets Assets	1979632000	USD
CY2018Q1	us-gaap	Assets Assets	1976678000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	830994000	USD
CY2018Q1	us-gaap	Assets Current AssetsCurrent	867705000	USD
CY2018Q1	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	155914000	USD
CY2017Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	192690000	USD
CY2018Q1	us-gaap	Assets Noncurrent AssetsNoncurrent	173462000	USD
CY2017Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	155846000	USD
CY2018Q1	us-gaap	Available For Sale Securities AvailableForSaleSecurities	144652000	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	22000	USD
CY2018Q1	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	0	USD
CY2017Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	365000	USD
CY2018Q1	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	658000	USD
CY2017Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	156189000	USD
CY2018Q1	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	145310000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	132000000	USD
CY2018Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	94700000	USD
CY2017Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	0	USD
CY2018Q1	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	50000000	USD
CY2017Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	155846000	USD
CY2018Q1	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	144652000	USD
CY2017Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	347580000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	273387000	USD
CY2018Q1	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	288332000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	376422000	USD
CY2017Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	416564000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	273602000	USD
CY2018Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	291258000	USD
CY2017Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	40142000	USD
CY2018Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	17656000	USD
CY2017Q1	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	600975000	USD
CY2018Q1	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	575295000	USD
CY2017Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0
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CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
CY2018Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	300000000	shares
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CY2018Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	25047000	shares
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	250000	USD
CY2018Q1	us-gaap	Common Stock Value CommonStockValue	250000	USD
CY2017Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	51300000	USD
CY2018Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	65884000	USD
CY2017Q1	us-gaap	Cost Of Goods Sold Excluding Depreciation Depletion And Amortization CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization	460450000	USD
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CY2017Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	336100000	USD
CY2018Q1	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	332300000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	7032000	USD
CY2018Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	6782000	USD
CY2017Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	14036000	USD
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CY2017Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	50042000	USD
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CY2018Q1	us-gaap	Derivative Assets DerivativeAssets	11262000	USD
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CY2017Q1	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	347000	USD
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CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.07
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CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.74
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	53149000	USD
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CY2017Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	54692000	USD
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CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	106107000	USD
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CY2018Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-25000	USD
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CY2018Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	833000	USD
CY2018Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	1241000	USD
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CY2018Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	4969000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	84760000	USD
CY2018Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	88130000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12436000	USD
CY2018Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	9066000	USD
CY2017Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-2030000	USD
CY2018Q1	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2017Q1	us-gaap	Gross Profit GrossProfit	66985000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	65167000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	52508000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	59441000	USD
CY2017Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	840000	USD
CY2018Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-544000	USD
CY2017Q1	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-11900000	USD
CY2018Q1	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-10639000	USD
CY2017Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18376000	USD
CY2018Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	12483000	USD
CY2017Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-7039000	USD
CY2018Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-4607000	USD
CY2017Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	920000	USD
CY2018Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1465000	USD
CY2017Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	483000	USD
CY2018Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	754000	USD
CY2017Q1	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-5830000	USD
CY2018Q1	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-12127000	USD
CY2017Q1	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-4965000	USD
CY2018Q1	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	11596000	USD
CY2017Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	11732000	USD
CY2018Q1	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	14871000	USD
CY2017Q1	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-20529000	USD
CY2018Q1	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-26052000	USD
CY2017Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-6964000	USD
CY2018Q1	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-8005000	USD
CY2017Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-37134000	USD
CY2018Q1	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	28728000	USD
CY2017Q1	us-gaap	Interest Expense InterestExpense	9425000	USD
CY2018Q1	us-gaap	Interest Expense InterestExpense	5395000	USD
CY2017Q1	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-8898000	USD
CY2018Q1	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-4122000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	246000	USD
CY2018Q1	us-gaap	Interest Payable Current InterestPayableCurrent	254000	USD
CY2018Q1	us-gaap	Interest Rate Cash Flow Hedge Gain Loss To Be Reclassified During Next12 Months Net InterestRateCashFlowHedgeGainLossToBeReclassifiedDuringNext12MonthsNet	1800000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	128960000	USD
CY2018Q1	us-gaap	Inventory Net InventoryNet	143831000	USD
CY2017Q4	us-gaap	Inventory Parts And Components Net Of Reserves InventoryPartsAndComponentsNetOfReserves	74268000	USD
CY2018Q1	us-gaap	Inventory Parts And Components Net Of Reserves InventoryPartsAndComponentsNetOfReserves	79947000	USD
CY2017Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	300000	USD
CY2018Q1	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	900000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	1313767000	USD
CY2018Q1	us-gaap	Liabilities Liabilities	1288216000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1979632000	USD
CY2018Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1976678000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	334081000	USD
CY2018Q1	us-gaap	Liabilities Current LiabilitiesCurrent	300359000	USD
CY2017Q4	us-gaap	Litigation Reserve LitigationReserve	200000	USD
CY2018Q1	us-gaap	Litigation Reserve LitigationReserve	300000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	310134000	USD
CY2018Q1	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	307742000	USD
CY2017Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	308855000	USD
CY2018Q1	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	312544000	USD
CY2017Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-39252000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-50692000	USD
CY2017Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-46135000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1481000	USD
CY2017Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	125529000	USD
CY2018Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	66867000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	51668000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	59985000	USD
CY2017Q1	us-gaap	Nondebtor Reorganization Items Net Gain Loss On Settlement Of Other Claims1 NondebtorReorganizationItemsNetGainLossOnSettlementOfOtherClaims1	-2828000	USD
CY2018Q1	us-gaap	Nondebtor Reorganization Items Net Gain Loss On Settlement Of Other Claims1 NondebtorReorganizationItemsNetGainLossOnSettlementOfOtherClaims1	-301000	USD
CY2017Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-5579000	USD
CY2018Q1	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-1604000	USD
CY2018Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	Segment
CY2017Q1	us-gaap	Operating Expenses OperatingExpenses	533990000	USD
CY2018Q1	us-gaap	Operating Expenses OperatingExpenses	510128000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	58087000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	61045000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	14193000	USD
CY2018Q1	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	8736000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	70426000	USD
CY2018Q1	us-gaap	Other Assets Current OtherAssetsCurrent	68459000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	86583000	USD
CY2018Q1	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	68676000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-387000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-658000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-387000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-658000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	0	USD
CY2018Q1	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	0	USD
CY2017Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	0	USD
CY2018Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPortionAttributableToParent	0	USD
CY2017Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2018Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent	0	USD
CY2017Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	0	USD
CY2018Q1	us-gaap	Other Comprehensive Income Defined Benefit Plans Tax Portion Attributable To Parent OtherComprehensiveIncomeDefinedBenefitPlansTaxPortionAttributableToParent	0	USD
CY2017Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent	19000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Before Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent	6557000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	19000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent	6557000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	0	USD
CY2018Q1	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	0	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	6039000	USD
CY2017Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-368000	USD
CY2018Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	5899000	USD
CY2017Q1	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	14690000	USD
CY2018Q1	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	3051000	USD
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	59457000	USD
CY2018Q1	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	64140000	USD
CY2017Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	36514000	USD
CY2018Q1	us-gaap	Other Long Term Debt OtherLongTermDebt	33120000	USD
CY2017Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	527000	USD
CY2018Q1	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	1273000	USD
CY2017Q1	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	2310000	USD
CY2018Q1	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	6932000	USD
CY2017Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	102369000	USD
CY2018Q1	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	104902000	USD
CY2017Q4	us-gaap	Other Receivables OtherReceivables	29771000	USD
CY2018Q1	us-gaap	Other Receivables OtherReceivables	11405000	USD
CY2017Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2018Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	38186000	USD
CY2017Q1	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	2000000	USD
CY2017Q1	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	2030000	USD
CY2018Q1	us-gaap	Payments Of Debt Restructuring Costs PaymentsOfDebtRestructuringCosts	0	USD
CY2017Q1	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	7228000	USD
CY2018Q1	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	0	USD
CY2017Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	78523000	USD
CY2018Q1	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	38458000	USD
CY2017Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	5950000	USD
CY2018Q1	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	9453000	USD
CY2017Q1	us-gaap	Payments To Acquire Royalty Interests In Mining Properties PaymentsToAcquireRoyaltyInterestsInMiningProperties	63000	USD
CY2018Q1	us-gaap	Payments To Acquire Royalty Interests In Mining Properties PaymentsToAcquireRoyaltyInterestsInMiningProperties	62000	USD
CY2017Q1	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	721000	USD
CY2018Q1	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	1303000	USD
CY2017Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	298500000	USD
CY2018Q1	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2018Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	10000	USD
CY2017Q1	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-2810000	USD
CY2018Q1	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-3431000	USD
CY2017Q1	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	0	USD
CY2018Q1	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-750000	USD
CY2017Q1	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	0	USD
CY2018Q1	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	-8335000	USD
CY2017Q1	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	45886000	USD
CY2018Q1	us-gaap	Proceeds From Sale Maturity And Collections Of Investments ProceedsFromSaleMaturityAndCollectionsOfInvestments	49400000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	955948000	USD
CY2018Q1	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	935511000	USD
CY2018Q1	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	140000	USD
CY2017Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	325684000	USD
CY2018Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2017Q1	us-gaap	Restricted Cash RestrictedCash	68984000	USD
CY2018Q1	us-gaap	Restricted Cash RestrictedCash	2926000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	0	USD
CY2018Q1	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	2926000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	247232000	USD
CY2018Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	298664000	USD
CY2017Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	20762000	USD
CY2018Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	25948000	USD
CY2017Q1	us-gaap	Share Based Compensation ShareBasedCompensation	2426000	USD
CY2018Q1	us-gaap	Share Based Compensation ShareBasedCompensation	3845000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	665865000	USD
CY2018Q1	us-gaap	Stockholders Equity StockholdersEquity	688462000	USD
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	3977000	shares
CY2018Q1	us-gaap	Treasury Stock Shares TreasuryStockShares	4384000	shares
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	302109000	USD
CY2018Q1	us-gaap	Treasury Stock Value TreasuryStockValue	340698000	USD
CY2017Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	400000	shares
CY2018Q1	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	974000	shares
CY2017Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	25408000	shares
CY2018Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	21875000	shares
CY2017Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	25008000	shares
CY2018Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20901000	shares
CY2017Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	18782000	USD
CY2018Q1	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	19291000	USD
CY2017Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	184835000	USD
CY2018Q1	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	185159000	USD

Files In Submission

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$ARCH
ARCH RESOURCES, INC. Stock $arch

2018 Q1 Form 10-Q Financial Statement

#000162828018005094 Filed on April 26, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ARCH ARCH RESOURCES, INC. Stock $arch

2018 Q1 Form 10-Q Financial Statement

#000162828018005094 Filed on April 26, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ARCH
ARCH RESOURCES, INC. Stock $arch