$ARCH
ARCH RESOURCES, INC. Stock $arch

$arch Overview Financials Valuation SEC Filings Company Website

2014 Q1 Form 10-K Financial Statement

#000104746914001604 Filed on February 28, 2014

Income Statement

Concept	2014 Q1	2013	2012 Q4
Revenue	$736.0M	$822.0M	$867.0M
YoY Change	-0.19%	-28.71%	-29.44%
Cost Of Revenue	$686.3M	$2.981M	$740.8M
YoY Change	5.63%	11.44%	-21.67%
Gross Profit	-$49.84M	$819.0M	$12.52M
YoY Change	168.55%	-28.81%	-91.89%
Gross Profit Margin	-6.77%	99.64%	1.44%
Selling, General & Admin	$29.14M	$133.4M	$35.00M
YoY Change	-12.26%	-0.63%	33.08%
% of Gross Profit		16.29%	279.64%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$104.4M	$447.7M	$125.8M
YoY Change	-12.15%	-14.81%	-14.01%
% of Gross Profit		54.66%	1005.11%
Operating Expenses	$809.1M	$3.677B	$254.7M
YoY Change	2.57%	-18.73%	63.37%
Operating Profit	-$73.12M	-$663.1M	-$307.2M
YoY Change	42.18%	-12.4%	-319.83%
Interest Expense	$96.47M	$381.3M	-$55.70M
YoY Change	1.47%	20.04%	-11.02%
% of Operating Profit
Other Income/Expense, Net		-$42.92M
YoY Change		81.35%
Pretax Income	-$167.8M	-$1.081B	-$398.3M
YoY Change	16.76%	-1.11%	-730.22%
Income Tax	-$43.61M	-$335.5M	-$91.30M
% Of Pretax Income
Net Earnings	-$124.1M	-$641.8M	-$295.4M
YoY Change	77.22%	-6.16%	-514.83%
Net Earnings / Revenue	-16.87%	-78.08%	-34.07%
Basic Earnings Per Share		-$3.03	-$1.39
Diluted Earnings Per Share	-$5.85	-$3.03	-$1.39
COMMON SHARES
Basic Shares Outstanding	212.3M shares	212.1M shares	212.2M shares
Diluted Shares Outstanding		212.1M shares

Balance Sheet

Concept	2014 Q1	2013	2012 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.045B	$1.160B	$1.019B
YoY Change	6.74%	13.84%	637.56%
Cash & Equivalents	$795.9M	$911.0M	$784.6M
Short-Term Investments	$248.6M	$248.0M	$234.3M
Other Short-Term Assets	$55.30M	$129.0M	$92.47M
YoY Change	-37.85%	-34.52%	-16.17%
Inventory	$224.8M	$264.0M	$365.4M
Prepaid Expenses
Receivables	$230.0M	$198.0M	$247.5M
Other Receivables	$45.00M	$32.00M	$84.00M
Total Short-Term Assets	$1.737B	$1.782B	$1.914B
YoY Change	-7.8%	-6.9%	61.83%
LONG-TERM ASSETS
Property, Plant & Equipment	$6.616B	$6.734B	$7.337B
YoY Change	-9.03%	-8.22%	-7.7%
Goodwill			$265.4M
YoY Change			-55.47%
Intangibles
YoY Change
Long-Term Investments	$223.2M	$221.0M	$242.2M
YoY Change	-9.55%	-8.68%	7.36%
Other Assets	$158.9M	$252.0M	$160.2M
YoY Change	-0.24%	1.61%	-7.79%
Total Long-Term Assets	$469.7M	$7.208B	$755.6M
YoY Change	-38.46%	-10.94%	-30.17%
TOTAL ASSETS
Total Short-Term Assets	$1.737B	$1.782B	$1.914B
Total Long-Term Assets	$469.7M	$7.208B	$755.6M
Total Assets	$8.823B	$8.990B	$10.01B
YoY Change	-11.06%	-10.16%	-2.03%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$160.4M	$176.0M	$224.4M
YoY Change	-30.06%	-21.43%	-41.52%
Accrued Expenses	$328.6M	$279.0M	$318.0M
YoY Change	-6.67%	-12.26%	-8.67%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$30.00M	$33.00M	$33.00M
YoY Change	7.14%	0.0%	-88.26%
Total Short-Term Liabilities	$518.9M	$488.0M	$577.1M
YoY Change	-14.97%	-15.42%	-43.46%
LONG-TERM LIABILITIES
Long-Term Debt	$5.113B	$5.118B	$5.086B
YoY Change	0.61%	0.63%	0.0%
Other Long-Term Liabilities	$181.9M	$717.0M	$221.0M
YoY Change	-20.01%	-13.09%	-13.45%
Total Long-Term Liabilities	$5.295B	$5.835B	$5.307B
YoY Change	-0.28%	-1.29%	-0.64%
TOTAL LIABILITIES
Total Short-Term Liabilities	$518.9M	$488.0M	$577.1M
Total Long-Term Liabilities	$5.295B	$5.835B	$5.307B
Total Liabilities	$6.696B	$6.737B	$7.152B
YoY Change	-6.18%	-5.8%	7.97%
SHAREHOLDERS EQUITY
Retained Earnings	-$897.6M		-$104.0M
YoY Change	397.4%		-116.72%
Common Stock	$3.043B		$3.029B
YoY Change	0.38%		0.38%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$53.85M		$53.85M
YoY Change	0.0%		0.0%
Treasury Stock Shares
Shareholders Equity	$2.127B	$2.253B	$2.855B
YoY Change
Total Liabilities & Shareholders Equity	$8.823B	$8.990B	$10.01B
YoY Change	-11.06%	-10.16%	-2.03%

Cashflow Statement

Concept	2014 Q1	2013	2012 Q4
OPERATING ACTIVITIES
Net Income	-$124.1M	-$641.8M	-$295.4M
YoY Change	77.22%	-6.16%	-514.83%
Depreciation, Depletion And Amortization	$104.4M	$447.7M	$125.8M
YoY Change	-12.15%	-14.81%	-14.01%
Cash From Operating Activities	-$40.28M	$55.74M	-$23.60M
YoY Change	-193.03%	-83.25%	-113.82%
INVESTING ACTIVITIES
Capital Expenditures	$14.45M	$297.0M	-$95.30M
YoY Change	-73.49%	-24.86%	-71.02%
Acquisitions
YoY Change
Other Investing Activities	$23.50M	$437.4M	-$140.4M
YoY Change	-232.77%	-281.72%	-2440.0%
Cash From Investing Activities	$8.413M	$125.4M	-$235.7M
YoY Change	-110.34%	-119.32%	-27.01%
FINANCING ACTIVITIES
Cash Dividend Paid	$2.123M	$25.48M
YoY Change	-66.66%	-39.97%
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net	$4.875M	$628.7M
YoY Change		38.8%
Cash From Financing Activities	-$13.48M	-$54.71M	493.1M
YoY Change	-18.11%	-105.68%	274.7%
NET CHANGE
Cash From Operating Activities	-$40.28M	$55.74M	-23.60M
Cash From Investing Activities	$8.413M	$125.4M	-235.7M
Cash From Financing Activities	-$13.48M	-$54.71M	493.1M
Net Change In Cash	-$45.34M	$126.5M	233.8M
YoY Change	-16.82%	-80.44%	-1240.49%
FREE CASH FLOW
Cash From Operating Activities	-$40.28M	$55.74M	-$23.60M
Capital Expenditures	$14.45M	$297.0M	-$95.30M
Free Cash Flow	-$54.73M	-$241.2M	$71.70M
YoY Change	387.3%	286.48%	-85.65%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2012Q4	aci	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	318018000	USD
CY2013Q4	aci	Accrued Expenses And Other Current Liabilities AccruedExpensesAndOtherCurrentLiabilities	278575000	USD
CY2012Q4	aci	Accrued Expenses Derivatives And Other Liabilities Current AccruedExpensesDerivativesAndOtherLiabilitiesCurrent	319755000	USD
CY2013Q4	aci	Accrued Expenses Derivatives And Other Liabilities Current AccruedExpensesDerivativesAndOtherLiabilitiesCurrent	278587000	USD
CY2012	aci	Acquisition And Transition Costs AcquisitionAndTransitionCosts	0	USD
CY2013	aci	Acquisition And Transition Costs AcquisitionAndTransitionCosts	0	USD
CY2011	aci	Acquisition And Transition Costs AcquisitionAndTransitionCosts	47360000	USD
CY2013	aci	Changeinfairvalueofcoalderivativesandcoaltradingactivitiesnet Changeinfairvalueofcoalderivativesandcoaltradingactivitiesnet	7845000	USD
CY2011	aci	Changeinfairvalueofcoalderivativesandcoaltradingactivitiesnet Changeinfairvalueofcoalderivativesandcoaltradingactivitiesnet	-2907000	USD
CY2012	aci	Changeinfairvalueofcoalderivativesandcoaltradingactivitiesnet Changeinfairvalueofcoalderivativesandcoaltradingactivitiesnet	-16590000	USD
CY2013Q4	aci	Coal Supply Agreement Liability CoalSupplyAgreementLiability	14373000	USD
CY2012Q4	aci	Coal Supply Agreement Liability CoalSupplyAgreementLiability	14038000	USD
CY2012Q4	aci	Coallandsandmineralrights Coallandsandmineralrights	6218776000	USD
CY2013Q4	aci	Coallandsandmineralrights Coallandsandmineralrights	5991719000	USD
CY2011	us-gaap	Income Tax Effects Allocated Directly To Equity Employee Stock Options IncomeTaxEffectsAllocatedDirectlyToEquityEmployeeStockOptions	-400000	USD
CY2011	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	43322000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	14.18
CY2012Q4	aci	Coalsupplyagreementgrossobligationliability Coalsupplyagreementgrossobligationliability	166697000	USD
CY2013Q4	aci	Coalsupplyagreementgrossobligationliability Coalsupplyagreementgrossobligationliability	166697000	USD
CY2012Q4	aci	Coalsupplyagreementobligationnet Coalsupplyagreementobligationnet	61460000	USD
CY2013Q4	aci	Coalsupplyagreementobligationnet Coalsupplyagreementobligationnet	46330000	USD
CY2011Q3	aci	Damages And Interest Awarded DamagesAndInterestAwarded	104100000	USD
CY2012Q4	aci	Deferredminedevelopment Deferredminedevelopment	1079856000	USD
CY2013Q4	aci	Deferredminedevelopment Deferredminedevelopment	979270000	USD
CY2013Q4	aci	Deferredtaxassetsplantandequipment Deferredtaxassetsplantandequipment	20527000	USD
CY2012Q4	aci	Deferredtaxassetsplantandequipment Deferredtaxassetsplantandequipment	32087000	USD
CY2011	aci	Depreciationdepletionandamortizationproductionandnonproduction Depreciationdepletionandamortizationproductionandnonproduction	420980000	USD
CY2013	aci	Depreciationdepletionandamortizationproductionandnonproduction Depreciationdepletionandamortizationproductionandnonproduction	426442000	USD
CY2012	aci	Depreciationdepletionandamortizationproductionandnonproduction Depreciationdepletionandamortizationproductionandnonproduction	492211000	USD
CY2013Q4	aci	Effect Of Counterparty Netting In Derivative Assets EffectOfCounterpartyNettingInDerivativeAssets	47727000	USD
CY2012Q4	aci	Effect Of Counterparty Netting In Derivative Assets EffectOfCounterpartyNettingInDerivativeAssets	22548000	USD
CY2013Q4	aci	Effect Of Counterparty Netting In Derivative Liabilities EffectOfCounterpartyNettingInDerivativeLiabilities	47727000	USD
CY2012Q4	aci	Effect Of Counterparty Netting In Derivative Liabilities EffectOfCounterpartyNettingInDerivativeLiabilities	22548000	USD
CY2013Q4	aci	Finitelivedcoalsupplyagreementsgross Finitelivedcoalsupplyagreementsgross	131819000	USD
CY2012Q4	aci	Finitelivedcoalsupplyagreementsgross Finitelivedcoalsupplyagreementsgross	131819000	USD
CY2013Q4	aci	Finitelivedintangibleliabilitiesaccumulatedamortization Finitelivedintangibleliabilitiesaccumulatedamortization	-120367000	USD
CY2012Q4	aci	Finitelivedintangibleliabilitiesaccumulatedamortization Finitelivedintangibleliabilitiesaccumulatedamortization	-105237000	USD
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CY2013	aci	Income From Investment In Subsidiaries IncomeFromInvestmentInSubsidiaries		USD
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CY2013Q4	aci	Investment In Subsidiaries InvestmentInSubsidiaries		USD
CY2013Q4	aci	Letters Of Credit Posted In Companys Favor LettersOfCreditPostedInCompanysFavor	16700000	USD
CY2013	aci	Longtermcontractslifetermmaximum Longtermcontractslifetermmaximum	P7Y
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CY2013	aci	Net Proceeds From Commercial Paper And Net Borrowings On Lines Of Credit NetProceedsFromCommercialPaperAndNetBorrowingsOnLinesOfCredit		USD
CY2011Q4	aci	Netincomeexpenserelatedtodeferredcompensationplan Netincomeexpenserelatedtodeferredcompensationplan	6200000	USD
CY2013Q4	aci	Netincomeexpenserelatedtodeferredcompensationplan Netincomeexpenserelatedtodeferredcompensationplan	2600000	USD
CY2012Q4	aci	Netincomeexpenserelatedtodeferredcompensationplan Netincomeexpenserelatedtodeferredcompensationplan	3300000	USD
CY2012Q4	aci	Nettotalofacquiredsalescontractsliabilities Nettotalofacquiredsalescontractsliabilities	53417000	USD
CY2013Q4	aci	Nettotalofacquiredsalescontractsliabilities Nettotalofacquiredsalescontractsliabilities	43960000	USD
CY2012Q3	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	17500000	USD
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CY2013	aci	Percentageofgoodssoldunderlongtermcontract Percentageofgoodssoldunderlongtermcontract	0.59
CY2007Q3	aci	Purchase Replacement Coal PurchaseReplacementCoal	100000000	USD
CY2011	aci	Purchases Of Investments Advances To Affiliates PurchasesOfInvestmentsAdvancesToAffiliates	61909000	USD
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CY2013Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	176142000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	247539000	USD
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CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-16507000	USD
CY2013Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	37692000	USD
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CY2012Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3026823000	USD
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CY2013	us-gaap	Income Tax Effects Allocated Directly To Equity Employee Stock Options IncomeTaxEffectsAllocatedDirectlyToEquityEmployeeStockOptions	1500000	USD
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CY2012Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	38920000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11822000	USD
CY2013	us-gaap	Amortization Of Advance Royalty AmortizationOfAdvanceRoyalty	13706000	USD
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CY2012	us-gaap	Amortization Of Advance Royalty AmortizationOfAdvanceRoyalty	22650000	USD
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CY2012	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	20238000	USD
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CY2013Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	427653000	USD
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CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	68698000	USD
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CY2013	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-26578000	USD
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CY2013Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	402713000	USD
CY2013Q4	us-gaap	Assets Assets	8990193000	USD
CY2012Q4	us-gaap	Assets Assets	10006777000	USD
CY2011Q4	us-gaap	Assets Assets	10213959000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	1782071000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	1914104000	USD
CY2013Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	284397000	USD
CY2013Q4	us-gaap	Assets Fair Value Disclosure Nonrecurring AssetsFairValueDisclosureNonrecurring	71300000	USD
CY2013Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	473836000	USD
CY2013Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	255046000	USD
CY2012Q4	us-gaap	Available For Sale Securities Amortized Cost AvailableForSaleSecuritiesAmortizedCost	240382000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	223300000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	164300000	USD
CY2013Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	48700000	USD
CY2012Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	400000	USD
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	234305000	USD
CY2013Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	248414000	USD
CY2013	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	13678000	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Gains AvailableForSaleSecuritiesGrossUnrealizedGains	2706000	USD
CY2013	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	4281000	USD
CY2012	us-gaap	Available For Sale Securities Gross Unrealized Loss AvailableForSaleSecuritiesGrossUnrealizedLoss	3436000	USD
CY2013Q4	us-gaap	Borrowed Funds BorrowedFunds	5151495000	USD
CY2012Q4	us-gaap	Borrowed Funds BorrowedFunds	5118775000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	911099000	USD
CY2012Q4	us-gaap	Assets Noncurrent AssetsNoncurrent	755575000	USD
CY2013Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	264443000	USD
CY2012Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	239652000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	784622000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	138149000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	93593000	USD
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	126477000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	646473000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	44556000	USD
CY2012Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	35400000	USD
CY2013Q4	us-gaap	Cash Surrender Value Of Life Insurance CashSurrenderValueOfLifeInsurance	39400000	USD
CY2012	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	3768126000	USD
CY2013	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	3014357000	USD
CY2011	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	3883039000	USD
CY2013Q4	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	719386000	USD
CY2013Q3	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	791269000	USD
CY2013Q2	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	766332000	USD
CY2013Q1	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	737370000	USD
CY2012Q4	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	867034000	USD
CY2012Q3	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	975170000	USD
CY2012Q1	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	960237000	USD
CY2012Q2	us-gaap	Coal Products And Services Revenue CoalProductsAndServicesRevenue	965685000	USD
CY2011	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.43
CY2012	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2013	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.12
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	260000000	shares
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	260000000	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	213791799	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	213759000	shares
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	2141000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	2141000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-692512000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-587633000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	140150000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	141240000	USD
CY2013	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-587633000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-692239000	USD
CY2013	us-gaap	Cost Of Goods Sold CostOfGoodsSold	2981000	USD
CY2012	us-gaap	Cost Of Goods Sold CostOfGoodsSold	2675000	USD
CY2011	us-gaap	Cost Of Goods Sold CostOfGoodsSold	1572000	USD
CY2012	us-gaap	Cost Of Goods Sold Excluding Depreciation Depletion And Amortization CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization	3155099000	USD
CY2011	us-gaap	Cost Of Goods Sold Excluding Depreciation Depletion And Amortization CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization	2980354000	USD
CY2013	us-gaap	Cost Of Goods Sold Excluding Depreciation Depletion And Amortization CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization	2663136000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-24449000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-20022000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-19447000	USD
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-647000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-23377000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1072000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-647000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	575000	USD
CY2012Q4	us-gaap	Debt Current DebtCurrent	32896000	USD
CY2013Q4	us-gaap	Debt Current DebtCurrent	33493000	USD
CY2013	us-gaap	Debt Instrument Date Of First Required Payment1 DebtInstrumentDateOfFirstRequiredPayment1	2014-07-15
CY2013Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	4600000000	USD
CY2012Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	5000000000	USD
CY2013	us-gaap	Debt Instrument Frequency Of Periodic Payment DebtInstrumentFrequencyOfPeriodicPayment	on January 15 and July 15 of each year
CY2011	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	49490000	USD
CY2013	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	0	USD
CY2012	us-gaap	Debt Related Commitment Fees And Debt Issuance Costs DebtRelatedCommitmentFeesAndDebtIssuanceCosts	0	USD
CY2013Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	37000000	USD
CY2012Q4	us-gaap	Deferred Compensation Liability Current And Noncurrent DeferredCompensationLiabilityCurrentAndNoncurrent	31300000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-318956000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	1544000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-341486000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	17300000	USD
CY2013Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	19700000	USD
CY2013Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	99200000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	101500000	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-334851000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-334460000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-902000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	7026000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-15895000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2446000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	33392000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Deferred Income DeferredTaxAssetsDeferredIncome	38735000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	52636000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Goodwill And Intangible Assets DeferredTaxAssetsGoodwillAndIntangibleAssets	43839000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1156500000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1011831000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-364402000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	-596822000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	1113178000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	977168000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	49144000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Current DeferredTaxAssetsNetCurrent	67360000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	-413546000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	-664182000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	126755000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	150014000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	66777000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	68969000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	660916000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	496330000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	25440000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	28494000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	21798000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	19327000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	113843000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	104570000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	31641000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Impairment Losses DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses	32241000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	34663000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1573990000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	1477580000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	8170000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	72513000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	664182000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	413546000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	13018000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	13902000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	77013000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Other Finite Lived Assets DeferredTaxLiabilitiesOtherFiniteLivedAssets	91126000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1411446000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1364382000	USD
CY2013Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	7111000	USD
CY2012Q4	us-gaap	Defined Benefit Pension Plan Liabilities Noncurrent DefinedBenefitPensionPlanLiabilitiesNoncurrent	67630000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	366100000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Accumulated Benefit Obligation DefinedBenefitPlanAccumulatedBenefitObligation	341100000	USD
CY2013	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Decrease On Service And Interest Cost Components1 DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1	600000	USD
CY2013	us-gaap	Defined Benefit Plan Effect Of One Percentage Point Increase On Service And Interest Cost Components DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents	600000	USD
CY2012Q4	us-gaap	Defined Benefit Plan Fair Value Of Plan Assets DefinedBenefitPlanFairValueOfPlanAssets	322874000	USD
CY2013	us-gaap	Defined Benefit Plan Health Care Cost Trend Rate Assumed For Next Fiscal Year DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear	0.073
CY2013Q4	us-gaap	Defined Benefit Plan Pension Plans With Accumulated Benefit Obligations In Excess Of Plan Assets Aggregate Accumulated Benefit Obligation DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation	8800000	USD
CY2013Q4	us-gaap	Defined Benefit Plan Plans With Benefit Obligations In Excess Of Plan Assets Aggregate Benefit Obligation DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation	10100000	USD
CY2012	us-gaap	Defined Benefit Plan Recognized Net Gain Loss Due To Settlements And Curtailments1 DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1	-1800000	USD
CY2013	us-gaap	Defined Benefit Plan Ultimate Health Care Cost Trend Rate DefinedBenefitPlanUltimateHealthCareCostTrendRate	0.045
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	466587000	USD
CY2013	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	447704000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	525508000	USD
CY2012Q4	us-gaap	Derivative Assets DerivativeAssets	32315000	USD
CY2013Q4	us-gaap	Derivative Assets DerivativeAssets	19954000	USD
CY2013Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	19942000	USD
CY2012Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	30578000	USD
CY2013Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	2200000	USD
CY2012Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	16200000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	54863000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	67681000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	24285000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	47739000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Income Ineffective Portion And Amount Excluded From Effectiveness Testing Net DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet	5200000	USD
CY2012	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	5250000	USD
CY2013	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	188000	USD
CY2011	us-gaap	Derivative Instruments Gain Loss Recognized In Other Comprehensive Income Effective Portion Net DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet	2914000	USD
CY2013	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	32534000	USD
CY2012	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	43990000	USD
CY2011	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-7000	USD
CY2013Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	12000	USD
CY2012Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1737000	USD
CY2013	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	120321000	USD
CY2011	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	0	USD
CY2012	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	0	USD
	us-gaap	Discontinued Operation Gain Loss From Disposal Of Discontinued Operation Before Income Tax DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax	120321000	USD
	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax	32167000	USD
CY2011	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax	70515000	USD
CY2012	us-gaap	Discontinued Operation Income Loss From Discontinued Operation During Phase Out Period Before Income Tax DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodBeforeIncomeTax	75418000	USD
CY2011	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	16690000	USD
CY2012	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	20190000	USD
	us-gaap	Discontinued Operation Tax Effect Of Discontinued Operation DiscontinuedOperationTaxEffectOfDiscontinuedOperation	49092000	USD
CY2012	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	390912000	USD
	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	219002000	USD
CY2011	us-gaap	Disposal Group Including Discontinued Operation Revenue DisposalGroupIncludingDiscontinuedOperationRevenue	402856000	USD
CY2012	us-gaap	Dividends Common Stock DividendsCommonStock	42440000	USD
CY2011	us-gaap	Dividends Common Stock DividendsCommonStock	80748000	USD
CY2012Q4	us-gaap	Due From Affiliate Noncurrent DueFromAffiliateNoncurrent		USD
CY2013Q4	us-gaap	Due From Affiliate Noncurrent DueFromAffiliateNoncurrent		USD
CY2012Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent		USD
CY2013Q4	us-gaap	Due To Affiliate Noncurrent DueToAffiliateNoncurrent		USD
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.24
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.75
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.03
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.03
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.24
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2013Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.75
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.33
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.61
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.34
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-2.05
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.01
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.3931892779
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.49
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2011	us-gaap	Earnings Per Share Potentially Dilutive Securities EarningsPerSharePotentiallyDilutiveSecurities	819
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	466845000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	78961000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	52413000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	31243000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	57403000	USD
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	72405000	USD
CY2013Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	67621000	USD
CY2013Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	4900000	USD
CY2012Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	180917000	USD
CY2013Q4	us-gaap	Energy Related Inventory Coal EnergyRelatedInventoryCoal	117531000	USD
CY2013	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	28947000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Assets EquityMethodInvestmentSummarizedFinancialInformationAssets	450908000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	280690000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	287903000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Gross Profit Loss EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss	19495000	USD
CY2013	us-gaap	Equity Method Investment Summarized Financial Information Gross Profit Loss EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss	10234000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Gross Profit Loss EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss	15308000	USD
CY2013	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	6574000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	8898000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	13180000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	450908000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Liabilities And Equity EquityMethodInvestmentSummarizedFinancialInformationLiabilitiesAndEquity	466845000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Minority Interest EquityMethodInvestmentSummarizedFinancialInformationMinorityInterest	317000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Minority Interest EquityMethodInvestmentSummarizedFinancialInformationMinorityInterest	263000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	641000	USD
CY2013	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	-397000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	6788000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	387884000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	398495000	USD
CY2012Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	128489000	USD
CY2013Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	131445000	USD
CY2011	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	184358000	USD
CY2013	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	208289000	USD
CY2012	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	190661000	USD
CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	242215000	USD
CY2013Q4	us-gaap	Equity Method Investments EquityMethodInvestments	221456000	USD
CY2010Q4	us-gaap	Equity Method Investments EquityMethodInvestments	177451000	USD
CY2011Q4	us-gaap	Equity Method Investments EquityMethodInvestments	225605000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	129449000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-10253000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	-13399000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	-25000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues	17312000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	0	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	8654000	USD
CY2013	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	1604000	USD
CY2012	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements	1950000	USD
CY2013Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	4946000	USD
CY2012Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	8174000	USD
CY2011Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	6211000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	123776000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	-21500000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	-3100000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	-3300000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	2800000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-738915000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-745228000	USD
CY2013Q4	us-gaap	Gross Profit GrossProfit	-44801000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	6700000	USD
CY2012Q3	us-gaap	Gross Profit GrossProfit	53017000	USD
CY2012Q2	us-gaap	Gross Profit GrossProfit	47163000	USD
CY2010Q4	us-gaap	Goodwill Goodwill	114963000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	596103000	USD
CY2012Q1	us-gaap	Gross Profit GrossProfit	37715000	USD
CY2012Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	8043000	USD
CY2013Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	2370000	USD
CY2011	us-gaap	Gain Loss On Components Excluded From Assessment Of Price Risk Hedge Effectiveness GainLossOnComponentsExcludedFromAssessmentOfPriceRiskHedgeEffectiveness	8200000	USD
CY2011	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	0	USD
CY2012	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	-58335000	USD
CY2013	us-gaap	Gain Loss On Contract Termination GainLossOnContractTermination	0	USD
CY2013	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-42921000	USD
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1958000	USD
CY2012	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-23668000	USD
CY2013Q4	us-gaap	Goodwill Goodwill	0	USD
CY2012Q4	us-gaap	Goodwill Goodwill	265423000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	330680000	USD
CY2011	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2013	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	265423000	USD
CY2013Q2	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2013Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2013Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2012Q2	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	115791000	USD
CY2012Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2012Q1	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2013Q2	us-gaap	Gross Profit GrossProfit	2505000	USD
CY2013Q1	us-gaap	Gross Profit GrossProfit	-18560000	USD
CY2013Q3	us-gaap	Gross Profit GrossProfit	90000	USD
CY2012Q4	us-gaap	Gross Profit GrossProfit	12516000	USD
CY2012	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	15700000	USD
CY2013	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	142800000	USD
CY2013Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-84316000	USD
CY2013Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-80351000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1080726000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1092822000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	64736000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	64736000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-1092822000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.28
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.28
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.26
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-1080726000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	89015000	USD
CY2013Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-207767000	USD
CY2013Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-372794000	USD
CY2012Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	11610000	USD
CY2012Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	15508000	USD
CY2013	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	103396000	USD
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.26
CY2012Q1	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-14099000	USD
CY2012Q4	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-307033000	USD
CY2012Q2	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-442456000	USD
CY2012Q3	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	24673000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-3.52
CY2012	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-3.50
CY2011	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	0.47
CY2013	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-3.52
CY2011	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.47
CY2012	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-3.50
CY2013Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-1.76
CY2013Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.40
CY2013Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.38
CY2013Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.98
CY2012Q1	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-0.07
CY2012Q2	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-2.09
CY2012Q3	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	0.12
CY2012Q4	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-1.45
CY2012	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	55228000	USD
CY2011	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	53825000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	103396000	USD
CY2013Q1	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	14267000	USD
CY2013Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	8145000	USD
CY2013Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	79404000	USD
CY2013Q4	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	1580000	USD
CY2012Q3	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	21078000	USD
CY2012Q2	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	7032000	USD
CY2013	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	300000	USD
CY2011	us-gaap	Income Tax Examination Penalties And Interest Expense IncomeTaxExaminationPenaltiesAndInterestExpense	200000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash And Investments IncreaseDecreaseInRestrictedCashAndInvestments	-5167000	USD
	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.49
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8920000	USD
CY2013	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	7400000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	11311000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-24279000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-335498000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-353907000	USD
CY2013	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	15900000	USD
CY2012	us-gaap	Income Tax Effects Allocated Directly To Equity Employee Stock Options IncomeTaxEffectsAllocatedDirectlyToEquityEmployeeStockOptions	300000	USD
CY2013	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-4520000	USD
CY2012	us-gaap	Interest Paid InterestPaid	310241000	USD
CY2011	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	3868000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	42413000	USD
CY2013	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	263099000	USD
CY2012	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	336036000	USD
CY2011	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-10519000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	2416000	USD
CY2013	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	8659000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	31832000	USD
CY2013	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-378463000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22253000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-382581000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-53156000	USD
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-15796000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Depletion IncomeTaxReconciliationNondeductibleExpenseDepletion	-33654000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	56916000	USD
CY2013	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	70301000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses		USD
CY2012	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-2189000	USD
CY2013	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	5066000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	7998000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-3790000	USD
CY2013	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-25265000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-24231000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-18741000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-28057000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	7094000	USD
CY2012	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-42531000	USD
CY2013	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	17432000	USD
CY2012	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	27545000	USD
CY2011	us-gaap	Increase Decrease In Income Taxes Payable Net Of Income Taxes Receivable IncreaseDecreaseInIncomeTaxesPayableNetOfIncomeTaxesReceivable	-21759000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-9468000	USD
CY2013	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-44635000	USD
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	50900000	USD
CY2012	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-171580000	USD
CY2013	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-77521000	USD
CY2011	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	52191000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	11359000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-11245000	USD
CY2013	us-gaap	Interest Expense InterestExpense	381267000	USD
CY2012	us-gaap	Interest Expense InterestExpense	317615000	USD
CY2011	us-gaap	Interest Expense InterestExpense	230186000	USD
CY2012	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	15600000	USD
CY2011	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	1900000	USD
CY2013	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-374664000	USD
CY2012	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-312142000	USD
CY2011	us-gaap	Interest Income Expense Nonoperating Net InterestIncomeExpenseNonoperatingNet	-226877000	USD
CY2013	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-13046000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-113531000	USD
CY2011	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	74914000	USD
CY2013	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-62881000	USD
CY2013	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-3453000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-5167000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-6869000	USD
CY2013Q4	us-gaap	Interest Payable Current InterestPayableCurrent	18528000	USD
CY2013	us-gaap	Interest Paid InterestPaid	380389000	USD
CY2011	us-gaap	Interest Paid InterestPaid	213697000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	365424000	USD
CY2013Q4	us-gaap	Inventory Net InventoryNet	264161000	USD
CY2012Q4	us-gaap	Inventory Parts And Components Net Of Reserves InventoryPartsAndComponentsNetOfReserves	172139000	USD
CY2013Q4	us-gaap	Inventory Parts And Components Net Of Reserves InventoryPartsAndComponentsNetOfReserves	137497000	USD
CY2013Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	8400000	USD
CY2012Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	12368000	USD
CY2013Q4	us-gaap	Inventory Work In Process InventoryWorkInProcess	9133000	USD
CY2012	us-gaap	Inventory Write Down InventoryWriteDown	2600000	USD
CY2011	us-gaap	Investments In And Advances To Affiliates At Fair Value Gross Additions InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions	43489000	USD
CY2013	us-gaap	Investments In And Advances To Affiliates At Fair Value Period Increase Decrease InvestmentsInAndAdvancesToAffiliatesAtFairValuePeriodIncreaseDecrease	788000	USD
CY2011	us-gaap	Investments In And Advances To Affiliates At Fair Value Period Increase Decrease InvestmentsInAndAdvancesToAffiliatesAtFairValuePeriodIncreaseDecrease	-6646000	USD
CY2012	us-gaap	Investments In And Advances To Affiliates At Fair Value Period Increase Decrease InvestmentsInAndAdvancesToAffiliatesAtFairValuePeriodIncreaseDecrease	7690000	USD
CY2012Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	18100000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	7152210000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	6736944000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	10006777000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	8990193000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	488222000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	577069000	USD
CY2013	us-gaap	Line Of Credit Facility Covenant Terms LineOfCreditFacilityCovenantTerms	Terms of the Company's credit facilities and leases contain financial and other covenants that limit the ability of the Company to, among other things, acquire, dispose, merge or consolidate assets; incur additional debt; pay dividends and make distributions or repurchase stock; make investments; create liens; issue and sell capital stock of subsidiaries; enter into restrictions affecting the ability of restricted subsidiaries to make distributions, loans or advances to the Company; engage in transactions with affiliates and enter into sale and leaseback transactions. In addition, the covenants require the Company to pledge assets to collateralize the revolving credit and term loan facilities. The assets pledged include equity interests in wholly‑owned subsidiaries, certain real property interests, accounts receivable and inventory of the Company. Failure by the Company to comply with such covenants could result in an event of default, which, if not cured or waived, could have a material adverse effect on the Company.
CY2013	us-gaap	Line Of Credit Facility Expiration Date1 LineOfCreditFacilityExpirationDate1	2014-12-09
CY2013Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	253400000	USD
CY2013Q4	us-gaap	Litigation Reserve LitigationReserve	30400000	USD
CY2012Q4	us-gaap	Litigation Reserve LitigationReserve	32800000	USD
CY2013Q4	us-gaap	Litigation Reserve Current LitigationReserveCurrent	11700000	USD
CY2012Q4	us-gaap	Litigation Reserve Current LitigationReserveCurrent	4400000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	33500000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1900000000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	23700000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	24000000	USD
CY2013Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	24000000	USD
CY2013Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5118002000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	5085879000	USD
CY2011	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	0	USD
CY2013	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision		USD
CY2012	us-gaap	Loss Contingency Accrual Provision LossContingencyAccrualProvision	-79532000	USD
CY2013Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	402713000	USD
CY2012Q4	us-gaap	Mine Reclamation And Closing Liability Noncurrent MineReclamationAndClosingLiabilityNoncurrent	409705000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	2899230000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	962835000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-54710000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-649166000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	125445000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-3496916000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	55742000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	332804000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	642242000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	-641832000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	141683000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	-683955000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	1157000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	268000	USD
CY2013	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest		USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-23668000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-51448000	USD
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-42921000	USD
CY2012Q4	us-gaap	Notes Payable NotesPayable		USD
CY2013Q4	us-gaap	Notes Payable NotesPayable		USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-51431000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-234753000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-36279000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	119242000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	27797000	USD
CY2012	us-gaap	Operating Expenses OperatingExpenses	4525138000	USD
CY2011	us-gaap	Operating Expenses OperatingExpenses	3539978000	USD
CY2012Q4	us-gaap	Notes Receivable Related Parties NotesReceivableRelatedParties		USD
CY2013Q4	us-gaap	Notes Receivable Related Parties NotesReceivableRelatedParties		USD
CY2013	us-gaap	Operating Expenses OperatingExpenses	3677498000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	-757012000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	343061000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	-663141000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	164803000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	160164000	USD
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-307158000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-596893000	USD
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	41200000	USD
CY2013	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	42200000	USD
CY2011	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	43900000	USD
CY2013Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	1800000000	USD
CY2008Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	145100000	USD
CY2013Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	26015000	USD
CY2012Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	18842000	USD
CY2013Q4	us-gaap	Other Assets Current OtherAssetsCurrent	56746000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	92469000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	114000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	-3000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	10190000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	6480000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	114000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-1920000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	0	USD
CY2012	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	-1080000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	3710000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	54585000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-12132000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-11953000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	10894000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Before Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax	-2626000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-7650000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	6973000	USD
CY2013	us-gaap	Payments To Acquire Additional Interest In Subsidiaries PaymentsToAcquireAdditionalInterestInSubsidiaries	0	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	5936000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	27803000	USD
CY2013Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	39255000	USD
CY2012Q4	us-gaap	Other Postretirement Defined Benefit Plan Liabilities Noncurrent OtherPostretirementDefinedBenefitPlanLiabilitiesNoncurrent	45086000	USD
CY2012Q4	us-gaap	Other Receivables OtherReceivables	84541000	USD
CY2013Q4	us-gaap	Other Receivables OtherReceivables	31553000	USD
CY2013	us-gaap	Payments For Legal Settlements PaymentsForLegalSettlements	5000000	USD
CY2013Q3	us-gaap	Payments For Legal Settlements PaymentsForLegalSettlements	15600000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	-1679000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	3921000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-4303000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesTax	-947000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	54199000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-8552000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-1600000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-21291000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	77201000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	9376000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-13605000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	49398000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	3440000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7686000	USD
CY2012	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-25189000	USD
CY2013	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-9457000	USD
CY2011	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	-22069000	USD
CY2013Q4	us-gaap	Other Employee Related Liabilities Current And Noncurrent OtherEmployeeRelatedLiabilitiesCurrentAndNoncurrent	17200000	USD
CY2012Q4	us-gaap	Other Employee Related Liabilities Current And Noncurrent OtherEmployeeRelatedLiabilitiesCurrentAndNoncurrent	13100000	USD
CY2011	us-gaap	Other Income OtherIncome	10112000	USD
CY2013	us-gaap	Other Income OtherIncome	30218000	USD
CY2012	us-gaap	Other Income OtherIncome	63357000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	221030000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	190033000	USD
CY2012Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	40350000	USD
CY2013Q4	us-gaap	Other Long Term Debt OtherLongTermDebt	32162000	USD
CY2011	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	3309000	USD
CY2012	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	5473000	USD
CY2013	us-gaap	Other Nonoperating Income OtherNonoperatingIncome	6603000	USD
CY2011	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	10119000	USD
CY2013	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	-2316000	USD
CY2012	us-gaap	Other Operating Income Expense Net OtherOperatingIncomeExpenseNet	19367000	USD
CY2012	us-gaap	Payments For Proceeds From Previous Acquisition PaymentsForProceedsFromPreviousAcquisition	0	USD
CY2011	us-gaap	Payments For Proceeds From Previous Acquisition PaymentsForProceedsFromPreviousAcquisition	829000	USD
CY2013	us-gaap	Payments For Proceeds From Previous Acquisition PaymentsForProceedsFromPreviousAcquisition		USD
CY2012	us-gaap	Payments For Restructuring PaymentsForRestructuring	531234000	USD
CY2013	us-gaap	Payments Of Dividends PaymentsOfDividends	25475000	USD
CY2011	us-gaap	Payments Of Dividends PaymentsOfDividends	80748000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	395225000	USD
CY2012	us-gaap	Payments Of Dividends PaymentsOfDividends	42440000	USD
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	296984000	USD
CY2011	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	114823000	USD
CY2012	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	50568000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	540936000	USD
CY2013	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	20489000	USD
CY2012Q4	us-gaap	Prepaid Royalties PrepaidRoyalties	11416000	USD
CY2011	us-gaap	Payments To Acquire Royalty Interests In Mining Properties PaymentsToAcquireRoyaltyInterestsInMiningProperties	29957000	USD
CY2013	us-gaap	Payments To Acquire Royalty Interests In Mining Properties PaymentsToAcquireRoyaltyInterestsInMiningProperties	14947000	USD
CY2013Q4	us-gaap	Prepaid Royalties PrepaidRoyalties	8083000	USD
CY2013Q4	us-gaap	Price Risk Cash Flow Hedge Unrealized Gain Loss To Be Reclassified During Next12 Months PriceRiskCashFlowHedgeUnrealizedGainLossToBeReclassifiedDuringNext12Months	800000	USD
CY2013	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	213726000	USD
CY2012	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	236862000	USD
CY2011Q3	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	18400000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1993253000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2894339000	USD
CY2012	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	236862000	USD
CY2012	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates		USD
CY2013	us-gaap	Payments To Acquire Investments PaymentsToAcquireInvestments	213726000	USD
CY2013	us-gaap	Payments To Acquire Mineral Rights PaymentsToAcquireMineralRights	16000000	USD
CY2011	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates		USD
CY2013	us-gaap	Proceeds From Contributions From Affiliates ProceedsFromContributionsFromAffiliates		USD
CY2013	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	294000000	USD
CY2011	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt		USD
CY2012Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	87773000	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	644000000	USD
CY2013Q4	us-gaap	Prepaid Mineral Royalties Noncurrent PrepaidMineralRoyaltiesNoncurrent	87577000	USD
CY2011	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	0	USD
CY2013	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired		USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2012	us-gaap	Payments To Acquire Royalty Interests In Mining Properties PaymentsToAcquireRoyaltyInterestsInMiningProperties	13269000	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	194220000	USD
CY2013Q4	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	128824000	USD
CY2012Q4	us-gaap	Prepaid Expense And Other Assets Noncurrent PrepaidExpenseAndOtherAssetsNoncurrent	755575000	USD
CY2013Q4	us-gaap	Prepaid Expense And Other Assets Noncurrent PrepaidExpenseAndOtherAssetsNoncurrent	473836000	USD
CY2012	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent		USD
CY2011	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent		USD
CY2013	us-gaap	Proceeds From Contributions From Parent ProceedsFromContributionsFromParent		USD
CY2011	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses		USD
CY2013	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses	422663000	USD
CY2012	us-gaap	Proceeds From Divestiture Of Businesses ProceedsFromDivestitureOfBusinesses		USD
CY2011	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1267933000	USD
CY2012	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	0	USD
CY2013	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock		USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	1250000000	USD
CY2011	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	5334000	USD
CY2012Q4	us-gaap	Profit Loss ProfitLoss	-295423000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	45751000	USD
CY2012	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1633500000	USD
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	3000	USD
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	6939000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	5215000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	19.86
CY2012	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-682000	USD
CY2013	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-629172000	USD
CY2012	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-452934000	USD
CY2012	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	5131000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	-683687000	USD
CY2013	us-gaap	Profit Loss ProfitLoss	-641832000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	142840000	USD
CY2013Q4	us-gaap	Profit Loss ProfitLoss	-371214000	USD
CY2013	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-17250000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-7625000	USD
CY2013	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-6324000	USD
CY2013Q2	us-gaap	Profit Loss ProfitLoss	-72206000	USD
CY2013Q1	us-gaap	Profit Loss ProfitLoss	-70049000	USD
CY2013Q3	us-gaap	Profit Loss ProfitLoss	-128363000	USD
CY2012Q2	us-gaap	Profit Loss ProfitLoss	-435424000	USD
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	25.89
CY2011	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	2000000000	USD
CY2013	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	350000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Senior Long Term Debt ProceedsFromIssuanceOfSeniorLongTermDebt	359753000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities		USD
CY2011	us-gaap	Proceeds From Repayments Of Other Long Term Debt ProceedsFromRepaymentsOfOtherLongTermDebt	-605178000	USD
CY2011	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	0	USD
CY2013	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	194537000	USD
CY2012	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1754000	USD
CY2012	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	22825000	USD
CY2011	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	25887000	USD
CY2013	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	10790000	USD
CY2012	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	1754000	USD
CY2013	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	194537000	USD
CY2013	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised		USD
CY2011	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	2316000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	1409000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	10689897000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	9853475000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6734286000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	7337098000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	3391265000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Other PropertyPlantAndEquipmentOther	2882486000	USD
CY2013Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-5200000	USD
CY2012Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	332080000	USD
CY2013Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	229573000	USD
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	31.57
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	5.23
CY2012	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-3575000	USD
CY2013	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	386000	USD
CY2012Q4	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	15743000	USD
CY2013Q4	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	0	USD
CY2012Q3	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	-2144000	USD
CY2012Q2	us-gaap	Redemption Premium RedemptionPremium	0	USD
CY2013Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents		USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	3453000	USD
CY2010	us-gaap	Restructuring And Related Cost Incurred Cost RestructuringAndRelatedCostIncurredCost	523500000	USD
CY2011	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	7316000	USD
CY2013	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	220879000	USD
CY2012	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	539182000	USD
CY2013Q3	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	200397000	USD
CY2013Q1	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	0	USD
CY2013Q2	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	20482000	USD
CY2012Q2	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	525583000	USD
CY2012Q1	us-gaap	Restructuring Settlement And Impairment Provisions RestructuringSettlementAndImpairmentProvisions	0	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-104042000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-771349000	USD
CY2011	us-gaap	Revenues Revenues	900000000	USD
CY2012	us-gaap	Revenues Revenues	1153100000	USD
CY2013	us-gaap	Revenues Revenues	800000000	USD
CY2012	us-gaap	Royalty Expense RoyaltyExpense	302000000	USD
CY2011	us-gaap	Royalty Expense RoyaltyExpense	349000000	USD
CY2013	us-gaap	Royalty Expense RoyaltyExpense	261100000	USD
CY2013	us-gaap	Sale Leaseback Transaction Gross Proceeds SaleLeasebackTransactionGrossProceeds	34919000	USD
CY2011	us-gaap	Sale Leaseback Transaction Gross Proceeds SaleLeasebackTransactionGrossProceeds		USD
CY2012	us-gaap	Sale Leaseback Transaction Gross Proceeds SaleLeasebackTransactionGrossProceeds		USD
CY2013	dei	Document Period End Date DocumentPeriodEndDate	2013-12-31
CY2013	dei	Document Type DocumentType	10-K
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	190905000	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	212098000	shares
CY2012Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	81629000	USD
CY2013Q4	us-gaap	Workers Compensation Liability Noncurrent WorkersCompensationLiabilityNoncurrent	78062000	USD
CY2013	dei	Entity Central Index Key EntityCentralIndexKey	0001037676
CY2014Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	212279999	shares
CY2013	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	211381000	shares
CY2013	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q2	dei	Entity Public Float EntityPublicFloat	791100000	USD
CY2013	dei	Entity Registrant Name EntityRegistrantName	ARCH COAL INC
CY2013	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	211381000	shares
CY2013	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	212098000	shares
CY2013	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	133448000	USD
CY2011	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	119056000	USD
CY2012	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	134299000	USD
CY2012	us-gaap	Severance Costs1 SeveranceCosts1	12300000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	11790000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	11822000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	10882000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0125
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.0230
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.02917887
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.60716438
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.667
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate	0.574
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.00757062
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0065
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Risk Free Interest Rate ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate	0.0192
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	30900000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	10300000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	3724000	shares
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	28.14
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	2600000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	1800000	USD
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	136000	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice	29.01
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	138000	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	1998000	shares
CY2013	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	2.37
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	5.27
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y6M
CY2011	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y6M
CY2012	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1	P4Y6M
CY2013Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	0	USD
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P5Y3M18D
CY2013	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P6Y8M12D
CY2011	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	48705000	shares
CY2012	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	49000	shares
CY2013	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	39000	shares
CY2011	us-gaap	Stock Issued During Period Shares Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures	162000	shares
CY2012	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	526000	shares
CY2013	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	-6000	shares
CY2011	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	199000	shares
CY2012	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	-5474000	USD
CY2011	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	1267933000	USD
CY2013	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2011	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	2316000	USD
CY2012	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	5131000	USD
CY2012	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	8000000	USD
CY2011	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	8800000	USD
CY2013	us-gaap	Stock Option Plan Expense StockOptionPlanExpense	6700000	USD
CY2013Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	14000000	shares
CY2013Q4	us-gaap	Stock Repurchase Program Remaining Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased	10925800	shares
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	2253249000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	2854567000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	3578040000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	2237507000	USD
CY2013	dei	Amendment Flag AmendmentFlag	false
CY2013	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	127000000	USD
CY2013	us-gaap	Trading Activity Gains And Losses Net TradingActivityGainsAndLossesNet	4900000	USD
CY2012	us-gaap	Trading Activity Gains And Losses Net TradingActivityGainsAndLossesNet	8300000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	53848000	USD
CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	53848000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1248000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1300000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1000000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	409000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1626000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1199000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	21943000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	2754000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	688000	USD
CY2014Q1	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	8798000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	31789000	USD
CY2010Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4418000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	31150000	USD
CY2013Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Due After Five Years UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears	407700000	USD
CY2013	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:6px;padding-top:6px;text-align:left;padding-left:24px;text-indent:-12px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Accounting Estimates </font></div><div style="line-height:120%;padding-bottom:6px;padding-top:6px;text-align:left;text-indent:24px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and revenues and expenses in the accompanying consolidated financial statements and the disclosure of contingent assets and liabilities. Actual results could differ from those estimates. </font></div></div>
CY2013	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	8700000	USD
CY2012	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	31800000	USD
CY2011	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	2100000	USD
CY2013Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	90496000	USD
CY2012Q4	us-gaap	Workers Compensation Liability Current And Noncurrent WorkersCompensationLiabilityCurrentAndNoncurrent	92000000	USD
CY2013	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2013	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	190086000	shares
CY2012Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	10371000	USD
CY2013Q4	us-gaap	Workers Compensation Liability Current WorkersCompensationLiabilityCurrent	12434000	USD

Files In Submission

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$ARCH
ARCH RESOURCES, INC. Stock $arch

2014 Q1 Form 10-K Financial Statement

#000104746914001604 Filed on February 28, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ARCH ARCH RESOURCES, INC. Stock $arch

2014 Q1 Form 10-K Financial Statement

#000104746914001604 Filed on February 28, 2014

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$ARCH
ARCH RESOURCES, INC. Stock $arch