$SD
SANDRIDGE ENERGY INC Stock $sd

$sd Overview Financials Valuation SEC Filings Company Website

2014 Form 10-K Financial Statement

#000134943615000082 Filed on February 27, 2015

Income Statement

Concept	2014	2013 Q4	2013 Q3
Revenue	$1.559B	$465.1M	$493.6M
YoY Change	-21.41%	-65.24%	-7.36%
Cost Of Revenue	$56.16M	$159.5M	$13.77M
YoY Change	-1.69%	-8.12%	-12.08%
Gross Profit	$1.503B	$305.7M	$479.8M
YoY Change	-21.99%	-16.97%	-7.21%
Gross Profit Margin	96.4%	65.73%	97.21%
Selling, General & Admin	$114.0M	$35.60M	$37.70M
YoY Change	-45.17%	-57.06%	-19.44%
% of Gross Profit	7.59%	11.65%	7.86%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$493.9M	$149.2M	$152.9M
YoY Change	-21.58%	-21.47%	-16.27%
% of Gross Profit	32.87%	48.81%	31.87%
Operating Expenses	$616.9M	$193.4M	$199.1M
YoY Change	-29.46%	-31.47%	-16.52%
Operating Profit	$590.2M	$122.3M	-$2.166M
YoY Change	-449.24%	-158.31%	-97.15%
Interest Expense	$89.90M	-$38.90M	-$194.2M
YoY Change	-128.33%	-41.24%	-29.48%
% of Operating Profit	15.23%	-31.82%
Other Income/Expense, Net	-$240.6M	$11.30M	-$60.73M
YoY Change	-29.19%	927.27%	-27.45%
Pretax Income	$349.6M	$71.80M	-$62.89M
YoY Change	-168.71%	-124.38%	-60.59%
Income Tax	-$2.293M	-$1.600M	$2.363M
% Of Pretax Income	-0.66%	-2.23%
Net Earnings	$253.3M	$73.38M	-$81.45M
YoY Change	-145.73%	-124.91%	-52.21%
Net Earnings / Revenue	16.25%	15.78%	-16.5%
Basic Earnings Per Share	$0.42	$0.06	-$0.20
Diluted Earnings Per Share	$0.42	$0.06	-$0.20
COMMON SHARES
Basic Shares Outstanding	479.6M shares	490.3M shares	483.6M shares
Diluted Shares Outstanding	499.7M shares		483.6M shares

Balance Sheet

Concept	2014	2013 Q4	2013 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$181.3M	$814.7M	$920.3M
YoY Change	-77.75%	162.98%	36.6%
Cash & Equivalents	$181.3M	$814.7M	$920.3M
Short-Term Investments
Other Short-Term Assets	$320.6M	$25.91M	$39.68M
YoY Change	311.03%	36.06%	154.01%
Inventory
Prepaid Expenses		$39.25M	$37.86M
Receivables	$330.1M	$349.2M	$390.9M
Other Receivables	$0.00	$2.500M	$0.00
Total Short-Term Assets	$831.9M	$1.242B	$1.403B
YoY Change	-33.01%	8.66%	14.16%
LONG-TERM ASSETS
Property, Plant & Equipment	$6.215B	$566.2M	$576.4M
YoY Change	-1.47%	-2.77%	-9.68%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$11.10M	$13.70M
YoY Change	-18.98%
Other Assets	$201.1M	$121.2M	$124.6M
YoY Change	82.98%	-16.0%	2.69%
Total Long-Term Assets	$6.427B	$6.443B	$6.266B
YoY Change	-0.24%	-25.5%	-27.26%
TOTAL ASSETS
Total Short-Term Assets	$831.9M	$1.242B	$1.403B
Total Long-Term Assets	$6.427B	$6.443B	$6.266B
Total Assets	$7.259B	$7.685B	$7.669B
YoY Change	-5.54%	-21.51%	-22.09%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$514.9M	$471.2M	$774.1M
YoY Change	9.27%	-15.75%	-0.65%
Accrued Expenses	$157.4M	$324.7M
YoY Change	-51.52%	70.27%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due		$0.00	$0.00
YoY Change
Total Short-Term Liabilities	$784.5M	$933.8M	$882.0M
YoY Change	-15.99%	-20.22%	-3.58%
LONG-TERM LIABILITIES
Long-Term Debt	$3.195B	$3.195B	$3.195B
YoY Change	0.02%	-25.72%	-25.71%
Other Long-Term Liabilities	$69.50M	$22.83M	$24.24M
YoY Change	-81.73%	33.9%	53.3%
Total Long-Term Liabilities	$3.265B	$3.218B	$3.219B
YoY Change	-8.68%	-25.48%	-25.42%
TOTAL LIABILITIES
Total Short-Term Liabilities	$784.5M	$933.8M	$882.0M
Total Long-Term Liabilities	$3.265B	$3.218B	$3.219B
Total Liabilities	$5.321B	$4.509B	$4.484B
YoY Change	-9.18%	-23.94%	-20.49%
SHAREHOLDERS EQUITY
Retained Earnings		-$3.460B	-$3.466B
YoY Change		21.38%	36.2%
Common Stock		$483.0K	$483.0K
YoY Change		1.47%	1.47%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$8.770M	$8.763M
YoY Change		1.95%	24.51%
Treasury Stock Shares		1.319M shares	1.269M shares
Shareholders Equity	$1.938B	$1.826B	$1.814B
YoY Change
Total Liabilities & Shareholders Equity	$7.259B	$7.685B	$7.669B
YoY Change	-5.54%	-21.51%	-22.09%

Cashflow Statement

Concept	2014	2013 Q4	2013 Q3
OPERATING ACTIVITIES
Net Income	$253.3M	$73.38M	-$81.45M
YoY Change	-145.73%	-124.91%	-52.21%
Depreciation, Depletion And Amortization	$493.9M	$149.2M	$152.9M
YoY Change	-21.58%	-21.47%	-16.27%
Cash From Operating Activities	$621.1M	$273.6M	$210.3M
YoY Change	-28.49%	37.49%	26.31%
INVESTING ACTIVITIES
Capital Expenditures	-$1.572B	-$334.7M	-$341.9M
YoY Change	3.82%	-36.16%	-40.87%
Acquisitions	$18.38M
YoY Change	7.96%
Other Investing Activities	$18.38M	$16.70M	$3.500M
YoY Change	7.96%	85.56%	169.23%
Cash From Investing Activities	-$857.2M	-$317.9M	-$338.4M
YoY Change	-180.09%	-38.31%	-41.33%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$111.8M
YoY Change
Debt Paid & Issued, Net	$0.00
YoY Change	-100.0%
Cash From Financing Activities	-$397.3M	-61.30M	-46.00M
YoY Change	-72.3%	29.05%	-106.94%
NET CHANGE
Cash From Operating Activities	$621.1M	273.6M	210.3M
Cash From Investing Activities	-$857.2M	-317.9M	-338.4M
Cash From Financing Activities	-$397.3M	-61.30M	-46.00M
Net Change In Cash	-$633.4M	-105.6M	-174.1M
YoY Change	-225.45%	-70.97%	-168.9%
FREE CASH FLOW
Cash From Operating Activities	$621.1M	$273.6M	$210.3M
Capital Expenditures	-$1.572B	-$334.7M	-$341.9M
Free Cash Flow	$2.193B	$608.3M	$552.2M
YoY Change	-7.96%	-15.9%	-25.85%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013	sd	Asset Retirement Obligation Liabilities Assumed In Acquisition AssetRetirementObligationLiabilitiesAssumedInAcquisition	0	USD
CY2014	sd	Asset Retirement Obligation Liabilities Assumed In Acquisition AssetRetirementObligationLiabilitiesAssumedInAcquisition	0	USD
CY2012	sd	Average Depreciation And Depletion Rate AverageDepreciationAndDepletionRate	16.93
CY2013	sd	Average Depreciation And Depletion Rate AverageDepreciationAndDepletionRate	16.81
CY2014	sd	Average Depreciation And Depletion Rate AverageDepreciationAndDepletionRate	15.00
CY2012	sd	Capitalized Costs Of Unproved Properties Excluded From Amortization Including Pipe Inventory Cost CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationIncludingPipeInventoryCost	102832000	USD
CY2014	sd	Adjustments To Additional Paid In Capital Shareholder Receivable Payments AdjustmentsToAdditionalPaidInCapitalShareholderReceivablePayments	1250000	USD
CY2012	sd	Asset Retirement Obligation Liabilities Assumed In Acquisition AssetRetirementObligationLiabilitiesAssumedInAcquisition	371365000	USD
CY2014	dei	Amendment Flag AmendmentFlag	false
CY2014	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2014	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2014	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2014
CY2014	dei	Document Period End Date DocumentPeriodEndDate	2014-12-31
CY2014	dei	Document Type DocumentType	10-K
CY2014	dei	Entity Central Index Key EntityCentralIndexKey	0001349436
CY2015Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	483839301	shares
CY2014	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2014	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2014Q2	dei	Entity Public Float EntityPublicFloat	3400000000	USD
CY2014	dei	Entity Registrant Name EntityRegistrantName	SANDRIDGE ENERGY INC
CY2014	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2014	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2014	dei	Trading Symbol TradingSymbol	SD
CY2013Q4	sd	Additional Paid In Capital Stockholder Receivable AdditionalPaidInCapitalStockholderReceivable	3750000	USD
CY2014Q4	sd	Additional Paid In Capital Stockholder Receivable AdditionalPaidInCapitalStockholderReceivable	2500000	USD
CY2013	sd	Adjustments To Additional Paid In Capital Shareholder Receivable Payments AdjustmentsToAdditionalPaidInCapitalShareholderReceivablePayments	1250000	USD
CY2013Q4	sd	Deferred Tax Assets Alternative Minimum Tax And Other Carryforwards DeferredTaxAssetsAlternativeMinimumTaxAndOtherCarryforwards	46624000	USD
CY2014Q4	sd	Oil And Gas Receivable Current OilAndGasReceivableCurrent	139848000	USD
CY2013	sd	Capitalized Costs Of Unproved Properties Excluded From Amortization Including Pipe Inventory Cost CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationIncludingPipeInventoryCost	58661000	USD
CY2014	sd	Capitalized Costs Of Unproved Properties Excluded From Amortization Including Pipe Inventory Cost CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationIncludingPipeInventoryCost	113390000	USD
CY2011Q4	sd	Capitalized Costs Of Unproved Properties Excluded From Amortization Including Pipe Inventory Cost Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationIncludingPipeInventoryCostCumulative	69354000	USD
CY2014Q4	sd	Capitalized Costs Of Unproved Properties Excluded From Amortization Including Pipe Inventory Cost Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationIncludingPipeInventoryCostCumulative	344237000	USD
CY2012	sd	Cash Distribution To Owners CashDistributionToOwners	181727000	USD
CY2013	sd	Cash Distribution To Owners CashDistributionToOwners	206470000	USD
CY2014	sd	Cash Distribution To Owners CashDistributionToOwners	193807000	USD
CY2012	sd	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	-77610000	USD
CY2013	sd	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	72848000	USD
CY2014	sd	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	-55557000	USD
CY2014	sd	Completion Of Evaluation Activities On Unproved Properties CompletionOfEvaluationActivitiesOnUnprovedProperties	P10Y
CY2014Q4	sd	Deferred Tax Assets Alternative Minimum Tax And Other Carryforwards DeferredTaxAssetsAlternativeMinimumTaxAndOtherCarryforwards	43840000	USD
CY2013Q4	sd	Deferred Tax Liabilities Equity Investments DeferredTaxLiabilitiesEquityInvestments	301447000	USD
CY2014Q4	sd	Deferred Tax Liabilities Equity Investments DeferredTaxLiabilitiesEquityInvestments	272902000	USD
CY2012	sd	Depreciation Depletion Amortization And Accretion DepreciationDepletionAmortizationAndAccretion	657830000	USD
CY2013	sd	Depreciation Depletion Amortization And Accretion DepreciationDepletionAmortizationAndAccretion	666645000	USD
CY2014	sd	Depreciation Depletion Amortization And Accretion DepreciationDepletionAmortizationAndAccretion	503023000	USD
CY2012	sd	Intercompanyborrowingsadvances Intercompanyborrowingsadvances	0	USD
CY2013	sd	Intercompanyborrowingsadvances Intercompanyborrowingsadvances	0	USD
CY2014	sd	Intercompanyborrowingsadvances Intercompanyborrowingsadvances	0	USD
CY2013Q4	sd	Investments In Subsidiaries InvestmentsInSubsidiaries	0	USD
CY2014Q4	sd	Investments In Subsidiaries InvestmentsInSubsidiaries	0	USD
CY2012	sd	Issuance Of Royalty Trust Units Value IssuanceOfRoyaltyTrustUnitsValue	587086000	USD
CY2013Q4	sd	Negative Investments In Subsidiaries NegativeInvestmentsInSubsidiaries	0	USD
CY2014Q4	sd	Negative Investments In Subsidiaries NegativeInvestmentsInSubsidiaries	0	USD
CY2012	sd	Net Income Loss From Subsidiaries NetIncomeLossFromSubsidiaries	0	USD
CY2013	sd	Net Income Loss From Subsidiaries NetIncomeLossFromSubsidiaries	0	USD
CY2014	sd	Net Income Loss From Subsidiaries NetIncomeLossFromSubsidiaries	0	USD
CY2013	sd	Noncontrolling Interest Increase Other NoncontrollingInterestIncreaseOther	1579000	USD
CY2014	sd	Number Of Counterparties To Open Derivative Contracts NumberOfCounterpartiesToOpenDerivativeContracts	9	Institution
CY2014	sd	Numberof Business Units NumberofBusinessUnits	3	business_unit
CY2013Q4	sd	Oil And Gas Property Cumulative Impairment Based On Ceiling Test Calculation OilAndGasPropertyCumulativeImpairmentBasedOnCeilingTestCalculation	3500000000	USD
CY2014Q4	sd	Oil And Gas Property Cumulative Impairment Based On Ceiling Test Calculation OilAndGasPropertyCumulativeImpairmentBasedOnCeilingTestCalculation	3700000000	USD
CY2013Q4	sd	Oil And Gas Receivable Current OilAndGasReceivableCurrent	166157000	USD
CY2013Q4	sd	Oil And Gas Services Receivable Current OilAndGasServicesReceivableCurrent	17904000	USD
CY2014Q4	sd	Oil And Gas Services Receivable Current OilAndGasServicesReceivableCurrent	21436000	USD
CY2012	sd	Payments For Proceeds From Derivative Instruments Operating Activities PaymentsForProceedsFromDerivativeInstrumentsOperatingActivities	-125932000	USD
CY2013	sd	Payments For Proceeds From Derivative Instruments Operating Activities PaymentsForProceedsFromDerivativeInstrumentsOperatingActivities	5879000	USD
CY2014	sd	Payments For Proceeds From Derivative Instruments Operating Activities PaymentsForProceedsFromDerivativeInstrumentsOperatingActivities	-11796000	USD
CY2012	sd	Payments For Purchase Of Noncontrolling Interest PaymentsForPurchaseOfNoncontrollingInterest	0	USD
CY2013	sd	Payments For Purchase Of Noncontrolling Interest PaymentsForPurchaseOfNoncontrollingInterest	0	USD
CY2014	sd	Payments For Purchase Of Noncontrolling Interest PaymentsForPurchaseOfNoncontrollingInterest	2730000	USD
CY2012	sd	Payments For Treasury Stock Nonqualified Plan PaymentsForTreasuryStockNonqualifiedPlan	14723000	USD
CY2012	sd	Pipe Inventory Costs Period Costs PipeInventoryCostsPeriodCosts	1600000	USD
CY2013	sd	Payments For Treasury Stock Nonqualified Plan PaymentsForTreasuryStockNonqualifiedPlan	32976000	USD
CY2014	sd	Payments For Treasury Stock Nonqualified Plan PaymentsForTreasuryStockNonqualifiedPlan	8702000	USD
CY2014Q4	sd	Percentage Of Reserves Sold Within Cost Center Not Expected To Result In Significant Alteration PercentageOfReservesSoldWithinCostCenterNotExpectedToResultInSignificantAlteration	0.25
CY2014Q4	sd	Percentage Proved Reserves Estimate Company PercentageProvedReservesEstimateCompany	0.139
CY2014Q4	sd	Pipe Inventory Costs Cumulative PipeInventoryCostsCumulative	53600000	USD
CY2013	sd	Pipe Inventory Costs Period Costs PipeInventoryCostsPeriodCosts	30700000	USD
CY2014	sd	Pipe Inventory Costs Period Costs PipeInventoryCostsPeriodCosts	21300000	USD
CY2012	sd	Preferred Dividends Accrued Not Yet Paid PreferredDividendsAccruedNotYetPaid	16572000	USD
CY2013	sd	Preferred Dividends Accrued Not Yet Paid PreferredDividendsAccruedNotYetPaid	16572000	USD
CY2014	sd	Preferred Dividends Accrued Not Yet Paid PreferredDividendsAccruedNotYetPaid	11072000	USD
CY2012	sd	Preferred Dividends Paid PreferredDividendsPaid	38953000	USD
CY2013	sd	Preferred Dividends Paid PreferredDividendsPaid	38953000	USD
CY2014	sd	Preferred Dividends Paid PreferredDividendsPaid	38953000	USD
CY2013Q4	sd	Preferred Stock Shares Designated PreferredStockSharesDesignated	7700000	shares
CY2014Q4	sd	Preferred Stock Shares Designated PreferredStockSharesDesignated	5700000	shares
CY2012	sd	Proceeds From Sale Of Royalty Trust Units ProceedsFromSaleOfRoyaltyTrustUnits	139360000	USD
CY2013	sd	Proceeds From Sale Of Royalty Trust Units ProceedsFromSaleOfRoyaltyTrustUnits	28985000	USD
CY2014	sd	Proceeds From Sale Of Royalty Trust Units ProceedsFromSaleOfRoyaltyTrustUnits	22119000	USD
CY2012	sd	Proceeds From Shareholder Receivable ProceedsFromShareholderReceivable	0	USD
CY2013	sd	Proceeds From Shareholder Receivable ProceedsFromShareholderReceivable	1250000	USD
CY2014	sd	Proceeds From Shareholder Receivable ProceedsFromShareholderReceivable	1250000	USD
CY2013Q4	sd	Production Payable Current ProductionPayableCurrent	127647000	USD
CY2014Q4	sd	Production Payable Current ProductionPayableCurrent	120573000	USD
CY2013Q4	sd	Proved Oiland Natural Gas Properties Cost Incurredin Excessof Development Agreement ProvedOilandNaturalGasPropertiesCostIncurredinExcessofDevelopmentAgreement	180000000	USD
CY2014Q4	sd	Proved Oiland Natural Gas Properties Cost Incurredin Excessof Development Agreement ProvedOilandNaturalGasPropertiesCostIncurredinExcessofDevelopmentAgreement	180000000	USD
CY2012	sd	Results Of Operations Depreciation And Depletion ResultsOfOperationsDepreciationAndDepletion	568029000	USD
CY2013	sd	Results Of Operations Depreciation And Depletion ResultsOfOperationsDepreciationAndDepletion	567732000	USD
CY2014	sd	Results Of Operations Depreciation And Depletion ResultsOfOperationsDepreciationAndDepletion	434295000	USD
CY2012Q4	sd	Shareholder Receivable Noncurrent Period Of Repayment ShareholderReceivableNoncurrentPeriodOfRepayment	P4Y
CY2012Q4	sd	Shareholder Receivable Number Of Annual Installments ShareholderReceivableNumberOfAnnualInstallments	4	Installment
CY2014	sd	Stock Repurchased And Retired During Period Value Broker Feesand Commissions StockRepurchasedAndRetiredDuringPeriodValueBrokerFeesandCommissions	500000	USD
CY2012Q4	sd	Stockholder Settlement Gross StockholderSettlementGross	5000000	USD
CY2013Q4	sd	Total Property And Equipment Net TotalPropertyAndEquipmentNet	6307675000	USD
CY2014Q4	sd	Total Property And Equipment Net TotalPropertyAndEquipmentNet	6215057000	USD
CY2012	sd	Treasury Stock Nonqualified Plan Value TreasuryStockNonqualifiedPlanValue	-298000	USD
CY2013	sd	Treasury Stock Nonqualified Plan Value TreasuryStockNonqualifiedPlanValue	-435000	USD
CY2014	sd	Treasury Stock Nonqualified Plan Value TreasuryStockNonqualifiedPlanValue	9000	USD
CY2014	sd	Unrecognized Excess Tax Benefits From Stock Based Compensation UnrecognizedExcessTaxBenefitsFromStockBasedCompensation	17700000	USD
CY2013Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	812488000	USD
CY2014Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	683392000	USD
CY2013Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	341008000	USD
CY2014Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	392500000	USD
CY2013Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	360279000	USD
CY2014Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	337160000	USD
CY2013Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	349218000	USD
CY2014Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	330077000	USD
CY2012	us-gaap	Accretion Of Discount AccretionOfDiscount	678200000	USD
CY2013	us-gaap	Accretion Of Discount AccretionOfDiscount	711385000	USD
CY2014	us-gaap	Accretion Of Discount AccretionOfDiscount	477458000	USD
CY2013Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	286209000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	118504000	USD
CY2013Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	87063000	USD
CY2014Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	305420000	USD
CY2012	us-gaap	Acquisition Costs AcquisitionCosts	98530000	USD
CY2013	us-gaap	Acquisition Costs AcquisitionCosts	21723000	USD
CY2014	us-gaap	Acquisition Costs AcquisitionCosts	64776000	USD
CY2011Q4	us-gaap	Acquisition Costs Cumulative AcquisitionCostsCumulative	62456000	USD
CY2014Q4	us-gaap	Acquisition Costs Cumulative AcquisitionCostsCumulative	247485000	USD
CY2013Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	5298301000	USD
CY2014Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	5204024000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	47228000	USD
CY2013	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	88397000	USD
CY2014	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	23665000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	-16000	USD
CY2013	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	-4000	USD
CY2014	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	14000	USD
CY2012	us-gaap	Advertising Expense AdvertisingExpense	11800000	USD
CY2013	us-gaap	Advertising Expense AdvertisingExpense	5100000	USD
CY2014	us-gaap	Advertising Expense AdvertisingExpense	1300000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3906000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5635000	USD
CY2013Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	11061000	USD
CY2014Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	7083000	USD
CY2012	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	6000	USD
CY2013	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	71000	USD
CY2014	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	4796000	USD
CY2012	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	2592000	USD
CY2013	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	1036000	USD
CY2014	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	529000	USD
CY2012	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	14388000	USD
CY2013	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	10091000	USD
CY2014	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	9425000	USD
CY2012	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2013	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2014	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2012	us-gaap	Asset Impairment Charges AssetImpairmentCharges	316004000	USD
CY2013	us-gaap	Asset Impairment Charges AssetImpairmentCharges	26280000	USD
CY2014	us-gaap	Asset Impairment Charges AssetImpairmentCharges	192768000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	128116000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	498410000	USD
CY2013Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	424117000	USD
CY2014Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	54402000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	28996000	USD
CY2013	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	36777000	USD
CY2014	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	9092000	USD
CY2014Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2013Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2014Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	0	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	7479000	USD
CY2013	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5078000	USD
CY2014	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	4968000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	72200000	USD
CY2013	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	113071000	USD
CY2014	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	377927000	USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	34654000	USD
CY2013	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-3077000	USD
CY2014	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-5848000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	379906000	USD
CY2013Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	337054000	USD
CY2014Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	54402000	USD
CY2013Q4	us-gaap	Assets Assets	7684795000	USD
CY2014Q4	us-gaap	Assets Assets	7259225000	USD
CY2013Q4	us-gaap	Assets Current AssetsCurrent	1241823000	USD
CY2014Q4	us-gaap	Assets Current AssetsCurrent	831918000	USD
CY2013Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	233405000	USD
CY2014Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	263191000	USD
CY2012	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	122696000	USD
CY2013	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2014	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2012Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	5231182000	USD
CY2013Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	5762969000	USD
CY2014Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	6359149000	USD
CY2012Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	865863000	USD
CY2013Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	531606000	USD
CY2014Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	290596000	USD
CY2012Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	12262921000	USD
CY2013Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	10972816000	USD
CY2014Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	11707147000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	207681000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	309766000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	814663000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	181253000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	102085000	USD
CY2013	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	504897000	USD
CY2014	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-633410000	USD
CY2013Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2014Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2013Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	800000000	shares
CY2014Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	800000000	shares
CY2013Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	491609000	shares
CY2014Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	485932000	shares
CY2013Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	490290000	shares
CY2014Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	484819000	shares
CY2013Q4	us-gaap	Common Stock Value CommonStockValue	483000	USD
CY2014	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	1526484000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-72000	USD
CY2013	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	3842000	USD
CY2014	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-1160000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-74000	USD
CY2013	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	5684000	USD
CY2014	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-2293000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-2000	USD
CY2013	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1842000	USD
CY2014	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1133000	USD
CY2014Q4	us-gaap	Common Stock Value CommonStockValue	477000	USD
CY2012	us-gaap	Construction Revenue ConstructionRevenue	0	USD
CY2013	us-gaap	Construction Revenue ConstructionRevenue	23349000	USD
CY2014	us-gaap	Construction Revenue ConstructionRevenue	0	USD
CY2012	us-gaap	Contract Revenue Cost ContractRevenueCost	0	USD
CY2013	us-gaap	Contract Revenue Cost ContractRevenueCost	23349000	USD
CY2014	us-gaap	Contract Revenue Cost ContractRevenueCost	0	USD
CY2012	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	68227000	USD
CY2013	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	57118000	USD
CY2014	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	56155000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	1609446000	USD
CY2013	us-gaap	Costs And Expenses CostsAndExpenses	2152389000	USD
CY2014	us-gaap	Costs And Expenses CostsAndExpenses	968534000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	1761556000	USD
CY2013	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	21130000	USD
CY2014	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	73370000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	377185000	USD
CY2013	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	100242000	USD
CY2014	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	123649000	USD
CY2012	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1704991000	USD
CY2013	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1131269000	USD
CY2014	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1288395000	USD
CY2012	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	120438000	USD
CY2013	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	82775000	USD
CY2014	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	41070000	USD
CY2012	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	3964170000	USD
CY2013	us-gaap	Costs Incurred Oil And Gas Property Acquisition Exploration And Development Activities CostsIncurredOilAndGasPropertyAcquisitionExplorationAndDevelopmentActivities	1335416000	USD
CY2013Q4	us-gaap	Customer Advances Current CustomerAdvancesCurrent	184203000	USD
CY2014Q4	us-gaap	Customer Advances Current CustomerAdvancesCurrent	33195000	USD
CY2012	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	410415000	USD
CY2013	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	3172187000	USD
CY2014	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	1058330000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-97410000	USD
CY2013	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2014	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	0	USD
CY2013	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	0	USD
CY2013Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	61923000	USD
CY2014Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	56445000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-100288000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2878000	USD
CY2013	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2014	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	3692000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1235038000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1400805000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Gross Noncurrent DeferredTaxAssetsGrossNoncurrent	0	USD
CY2014Q4	us-gaap	Deferred Tax Assets Gross Noncurrent DeferredTaxAssetsGrossNoncurrent	95843000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2014Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2013Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	973675000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	1265458000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	3400000000	USD
CY2010Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	929400000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	3156000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2934000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	9300000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	24895000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	19867000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	15012000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	27674000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	20358000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	19086000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	147626000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	21946000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	557300000	USD
CY2013Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	753451000	USD
CY2014Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	649592000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	481587000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	751213000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	0	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Current DeferredTaxLiabilitiesCurrent	95843000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	113735000	USD
CY2013Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	180140000	USD
CY2014Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	364576000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	628834000	USD
CY2013	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	629868000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	338417000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	26905000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	338417000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	78200000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	0	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	0	USD
CY2014	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	493931000	USD
CY2013Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	23369000	USD
CY2014Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	0	USD
CY2013Q4	us-gaap	Derivative Assets DerivativeAssets	26905000	USD
CY2014Q4	us-gaap	Derivative Assets DerivativeAssets	338417000	USD
CY2013Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	12779000	USD
CY2014Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	291414000	USD
CY2013Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	14126000	USD
CY2014Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	47003000	USD
CY2013Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2014Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	0	USD
CY2013Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	54831000	USD
CY2014Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	0	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	50274000	USD
CY2013Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-27926000	USD
CY2014Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	338417000	USD
CY2012	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	241419000	USD
CY2013	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-47123000	USD
CY2014	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	334011000	USD
CY2013Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	54831000	USD
CY2014Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	0	USD
CY2013Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	34267000	USD
CY2014Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	0	USD
CY2013Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	20564000	USD
CY2014Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	0	USD
CY2013Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	23369000	USD
CY2014Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	0	USD
CY2012	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	0	USD
CY2013	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	0	USD
CY2014	us-gaap	Dilutive Securities Effect On Basic Earnings Per Share Other DilutiveSecuritiesEffectOnBasicEarningsPerShareOther	6500000	USD
CY2012	us-gaap	Direct Operating Costs DirectOperatingCosts	635349000	USD
CY2013	us-gaap	Direct Operating Costs DirectOperatingCosts	682830000	USD
CY2014	us-gaap	Direct Operating Costs DirectOperatingCosts	483889000	USD
CY2013Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	16572000	USD
CY2014Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	11072000	USD
CY2012	us-gaap	Dividends Preferred Stock DividendsPreferredStock	55525000	USD
CY2013	us-gaap	Dividends Preferred Stock DividendsPreferredStock	55525000	USD
CY2014	us-gaap	Dividends Preferred Stock DividendsPreferredStock	50025000	USD
CY2013Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2014Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2014Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.55
CY2014	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
CY2013Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.05
CY2013Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.20
CY2014Q4	us-gaap	Due From Affiliate Current DueFromAffiliateCurrent	0	USD
CY2013Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2014Q4	us-gaap	Due To Affiliate Current DueToAffiliateCurrent	0	USD
CY2013Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	2533000	USD
CY2014Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	1852000	USD
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
CY2013Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.05
CY2013Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.20
CY2013Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.06
CY2013	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.27
CY2014Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.31
CY2014Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.10
CY2013Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.06
CY2013	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.27
CY2014Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.31
CY2014Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.10
CY2014Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
CY2014Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.48
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2013Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	59785000	USD
CY2014Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	44496000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-16000	USD
CY2013	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-4000	USD
CY2014	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	14000	USD
CY2012	us-gaap	Exploration Costs ExplorationCosts	4302000	USD
CY2013	us-gaap	Exploration Costs ExplorationCosts	36938000	USD
CY2014	us-gaap	Exploration Costs ExplorationCosts	48614000	USD
CY2011Q4	us-gaap	Exploration Costs Cumulative ExplorationCostsCumulative	6898000	USD
CY2014Q4	us-gaap	Exploration Costs Cumulative ExplorationCostsCumulative	96752000	USD
CY2012	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	2092423000	USD
CY2013	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	1406102000	USD
CY2014	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	1785963000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	29482544000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	19937484000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Cash Inflows FutureNetCashFlowsRelatingToProvedOilAndGasReservesCashInflows	21022320000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	4021051000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	2546680000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Development Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesDevelopmentCosts	1810201000	USD
CY2014	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	0	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	3721509000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	2283541000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Income Tax Expense FutureNetCashFlowsRelatingToProvedOilAndGasReservesIncomeTaxExpense	3223740000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	12840519000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	8263550000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Net Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesNetCashFlows	9489013000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	8899465000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	6843713000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Production Costs FutureNetCashFlowsRelatingToProvedOilAndGasReservesProductionCosts	6499366000	USD
CY2012Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	7000151000	USD
CY2013Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	4245939000	USD
CY2014Q4	us-gaap	Future Net Cash Flows Relating To Proved Oil And Gas Reserves Ten Percent Annual Discount For Estimated Timing Of Cash Flows FutureNetCashFlowsRelatingToProvedOilAndGasReservesTenPercentAnnualDiscountForEstimatedTimingOfCashFlows	5401261000	USD
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-3089000	USD
CY2013	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-399086000	USD
CY2014	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-10000	USD
CY2012	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-3075000	USD
CY2013	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-82005000	USD
CY2014	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2012	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	39669000	USD
CY2013	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	53644000	USD
CY2014	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	49905000	USD
CY2012	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	40486000	USD
CY2013	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	58304000	USD
CY2014	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	55658000	USD
CY2013Q4	us-gaap	Gas Imbalance Asset Liability GasImbalanceAssetLiability	-2600000	USD
CY2014Q4	us-gaap	Gas Imbalance Asset Liability GasImbalanceAssetLiability	-1400000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	241682000	USD
CY2013	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	330425000	USD
CY2014	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	122865000	USD
CY2012	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	235400000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	146209000	USD
CY2013	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-508795000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	349605000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-100362000	USD
CY2013	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5684000	USD
CY2014	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-2293000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1324000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4610000	USD
CY2014	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1928000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	44115000	USD
CY2013	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	101453000	USD
CY2014	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-66492000	USD
CY2012	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-84361000	USD
CY2013	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-133623000	USD
CY2012	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-45397000	USD
CY2014	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-3164000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-34447000	USD
CY2013	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	11229000	USD
CY2014	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-16322000	USD
CY2012	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-11229000	USD
CY2013	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-207729000	USD
CY2014	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-341183000	USD
CY2012	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	11433000	USD
CY2013	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	477328000	USD
CY2014	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-256371000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	1586000	USD
CY2013	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	3269000	USD
CY2014	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	50958000	USD
CY2012	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2014	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	17918000	shares
CY2013	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-5777000	USD
CY2014	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	1132000	USD
CY2012	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	5952000	USD
CY2013	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	7934000	USD
CY2014	us-gaap	Increase Decrease In Prepaid Expense IncreaseDecreaseInPrepaidExpense	-9549000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	141534000	USD
CY2013	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-90048000	USD
CY2014	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	63492000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-255000000	USD
CY2013	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	255000000	USD
CY2014	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2012	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	1708301000	USD
CY2013	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	1628000	USD
CY2012	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	2420000	shares
CY2013	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	0	shares
CY2014	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	2181000	shares
CY2013Q4	us-gaap	Insurance Settlements Receivable Current InsuranceSettlementsReceivableCurrent	2500000	USD
CY2014Q4	us-gaap	Insurance Settlements Receivable Current InsuranceSettlementsReceivableCurrent	0	USD
CY2012	us-gaap	Interest And Debt Expense InterestAndDebtExpense	303349000	USD
CY2013	us-gaap	Interest And Debt Expense InterestAndDebtExpense	270234000	USD
CY2014	us-gaap	Interest And Debt Expense InterestAndDebtExpense	244109000	USD
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-303349000	USD
CY2013	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-270234000	USD
CY2014	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-244109000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	257152000	USD
CY2013	us-gaap	Interest Paid Net InterestPaidNet	274850000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	235793000	USD
CY2013Q4	us-gaap	Interest Payable Current InterestPayableCurrent	80740000	USD
CY2014Q4	us-gaap	Interest Payable Current InterestPayableCurrent	79704000	USD
CY2013Q4	us-gaap	Land Land	18423000	USD
CY2014Q4	us-gaap	Land Land	16300000	USD
CY2012	us-gaap	Lease Operating Expense LeaseOperatingExpense	477154000	USD
CY2013	us-gaap	Lease Operating Expense LeaseOperatingExpense	516427000	USD
CY2014	us-gaap	Lease Operating Expense LeaseOperatingExpense	346088000	USD
CY2013Q4	us-gaap	Liabilities Liabilities	4509168000	USD
CY2014Q4	us-gaap	Liabilities Liabilities	4049405000	USD
CY2013Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7684795000	USD
CY2014Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	7259225000	USD
CY2013Q4	us-gaap	Liabilities Current LiabilitiesCurrent	933818000	USD
CY2014Q4	us-gaap	Liabilities Current LiabilitiesCurrent	784451000	USD
CY2013Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2014Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2013Q4	us-gaap	Long Term Debt LongTermDebt	3194907000	USD
CY2014Q4	us-gaap	Long Term Debt LongTermDebt	3195436000	USD
CY2013Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2014Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2013Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3194907000	USD
CY2014Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	3195436000	USD
CY2013Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	600603000	USD
CY2014Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	602392000	USD
CY2013Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	13708000	USD
CY2014Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	11106000	USD
CY2013Q4	us-gaap	Minority Interest MinorityInterest	1349817000	USD
CY2014Q4	us-gaap	Minority Interest MinorityInterest	1271995000	USD
CY2012	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	181727000	USD
CY2013	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	206470000	USD
CY2014	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	193807000	USD
CY2014	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	2730000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1874870000	USD
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-1434089000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-397283000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2555945000	USD
CY2013	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1070356000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-857241000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	783160000	USD
CY2013	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	868630000	USD
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	621114000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	141571000	USD
CY2013	us-gaap	Net Income Loss NetIncomeLoss	-553889000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	253285000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	105000000	USD
CY2013	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	39410000	USD
CY2014	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	98613000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86046000	USD
CY2013Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-501177000	USD
CY2013Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-42389000	USD
CY2013Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-95328000	USD
CY2013Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	29480000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-609414000	USD
CY2014Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-150217000	USD
CY2014Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-46775000	USD
CY2014Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	145957000	USD
CY2014Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	254295000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	203260000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	86046000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-609414000	USD
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	209760000	USD
CY2012	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-2555391000	USD
CY2014Q4	us-gaap	Other Assets Current OtherAssetsCurrent	21193000	USD
CY2013	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	271566000	USD
CY2014	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	331694000	USD
CY2012	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	139360000	USD
CY2013	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	28985000	USD
CY2014	us-gaap	Noncontrolling Interest Increase From Sale Of Parent Equity Interest NoncontrollingInterestIncreaseFromSaleOfParentEquityInterest	22119000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-178987000	USD
CY2013	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-339794000	USD
CY2014	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-240619000	USD
CY2013Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	11640000	USD
CY2014Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	0	USD
CY2014	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	3	segment
CY2013Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	168596000	USD
CY2014Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	170937000	USD
CY2012Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	13128784000	USD
CY2013Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	11504422000	USD
CY2014Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	11997743000	USD
CY2012Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	7897602000	USD
CY2013Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	5741453000	USD
CY2014Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	5638594000	USD
CY2012	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	1759282000	USD
CY2013	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	1820278000	USD
CY2014	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	1420879000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	325196000	USD
CY2013Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-367482000	USD
CY2013Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	78386000	USD
CY2013Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-2166000	USD
CY2013Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	122261000	USD
CY2013	us-gaap	Operating Income Loss OperatingIncomeLoss	-169001000	USD
CY2014Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-82330000	USD
CY2014Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	42079000	USD
CY2014Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	256491000	USD
CY2014Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	373984000	USD
CY2014	us-gaap	Operating Income Loss OperatingIncomeLoss	590224000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	3400000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1087000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	0	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	572000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	759000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	982000	USD
CY2014Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2012	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	2600000	USD
CY2013	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	3600000	USD
CY2014	us-gaap	Operating Leases Rent Expense Net OperatingLeasesRentExpenseNet	1700000	USD
CY2013Q4	us-gaap	Other Assets Current OtherAssetsCurrent	25910000	USD
CY2014	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3490000	USD
CY2012	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	1387000	USD
CY2013Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	5945000	USD
CY2014Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	1853000	USD
CY2013Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	121171000	USD
CY2014Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	165247000	USD
CY2014Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	5216000	USD
CY2013Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	22825000	USD
CY2014Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	15116000	USD
CY2013Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	25910000	USD
CY2014Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	21193000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4741000	USD
CY2013	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	12445000	USD
CY2012	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	60805000	USD
CY2013	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	62136000	USD
CY2014	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	59636000	USD
CY2012	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	241682000	USD
CY2013	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	207920000	USD
CY2014	us-gaap	Other General And Administrative Expense OtherGeneralAndAdministrativeExpense	113991000	USD
CY2013Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	0	USD
CY2013	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	3929000	USD
CY2014	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	407000	USD
CY2012	us-gaap	Other Operating Income OtherOperatingIncome	18241000	USD
CY2013	us-gaap	Other Operating Income OtherOperatingIncome	14871000	USD
CY2014	us-gaap	Other Operating Income OtherOperatingIncome	6133000	USD
CY2013Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	5122000	USD
CY2014Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	4939000	USD
CY2012	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	34518000	USD
CY2013	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	-6660000	USD
CY2014	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	44128000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2013	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	17028000	USD
CY2014	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	18384000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2014	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	111827000	USD
CY2012	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	844000	USD
CY2013	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	61997000	USD
CY2014	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2012	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	48538000	USD
CY2013	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	91000	USD
CY2014	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3947000	USD
CY2012	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	55525000	USD
CY2013	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	55525000	USD
CY2014	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	55525000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	840740000	USD
CY2013	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	17028000	USD
CY2014	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	18384000	USD
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2146372000	USD
CY2013	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1496731000	USD
CY2014	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1553332000	USD
CY2012	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	181727000	USD
CY2013	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	206470000	USD
CY2014	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	193807000	USD
CY2012	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	0	USD
CY2013	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	122505000	USD
CY2014	us-gaap	Postemployment Benefits Period Expense PostemploymentBenefitsPeriodExpense	8874000	USD
CY2012	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	55525000	USD
CY2013	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	55525000	USD
CY2014	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	50025000	USD
CY2013Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2014Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2013Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2014Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2013Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	39253000	USD
CY2014Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	7981000	USD
CY2012	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	-766943000	USD
CY2013	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	-474275000	USD
CY2014	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	-364262000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1850344000	USD
CY2013	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2014	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
CY2012	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2013	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	1579000	USD
CY2014	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	0	USD
CY2012	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	587086000	USD
CY2013	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	0	USD
CY2014	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	0	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-98639000	USD
CY2013	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	5403000	USD
CY2014	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-91649000	USD
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	431167000	USD
CY2013	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	2584115000	USD
CY2014	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	714475000	USD
CY2013Q4	us-gaap	Production Costs Cumulative ProductionCostsCumulative	45600000	USD
CY2014Q4	us-gaap	Production Costs Cumulative ProductionCostsCumulative	53600000	USD
CY2012	us-gaap	Production Tax Expense ProductionTaxExpense	47210000	USD
CY2013	us-gaap	Production Tax Expense ProductionTaxExpense	32292000	USD
CY2014	us-gaap	Production Tax Expense ProductionTaxExpense	31731000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	246571000	USD
CY2013Q2	us-gaap	Profit Loss ProfitLoss	16613000	USD
CY2013Q3	us-gaap	Profit Loss ProfitLoss	-65256000	USD
CY2013Q4	us-gaap	Profit Loss ProfitLoss	73379000	USD
CY2013	us-gaap	Profit Loss ProfitLoss	-514479000	USD
CY2014Q1	us-gaap	Profit Loss ProfitLoss	-142406000	USD
CY2014Q2	us-gaap	Profit Loss ProfitLoss	-17252000	USD
CY2014Q3	us-gaap	Profit Loss ProfitLoss	197499000	USD
CY2014Q4	us-gaap	Profit Loss ProfitLoss	314057000	USD
CY2014	us-gaap	Profit Loss ProfitLoss	351898000	USD
CY2012	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	2223982000	USD
CY2013	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	1423883000	USD
CY2014	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	1608889000	USD
CY2013Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-3460462000	USD
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-3257202000	USD
CY2012	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	12800000	USD
CY2013	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	1600000	USD
CY2013Q1	us-gaap	Profit Loss ProfitLoss	-539215000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	852431000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	881883000	USD
CY2013Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	566222000	USD
CY2014Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	576463000	USD
CY2014	us-gaap	Proved Developed And Undeveloped Reserve Purchase Of Mineral In Place Energy ProvedDevelopedAndUndevelopedReservePurchaseOfMineralInPlaceEnergy	3.5	MMBoe
CY2012	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1735000	USD
CY2013	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	5497000	USD
CY2014	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	818000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	366029000	USD
CY2013	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1115500000	USD
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2013Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	27955000	USD
CY2014Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	0	USD
CY2012	us-gaap	Results Of Operations Accretion Of Asset Retirement Obligations ResultsOfOperationsAccretionOfAssetRetirementObligations	28996000	USD
CY2013	us-gaap	Results Of Operations Accretion Of Asset Retirement Obligations ResultsOfOperationsAccretionOfAssetRetirementObligations	36777000	USD
CY2014	us-gaap	Results Of Operations Accretion Of Asset Retirement Obligations ResultsOfOperationsAccretionOfAssetRetirementObligations	9092000	USD
CY2012	us-gaap	Results Of Operations Expense From Oil And Gas Producing Activities ResultsOfOperationsExpenseFromOilAndGasProducingActivities	1121389000	USD
CY2013	us-gaap	Results Of Operations Expense From Oil And Gas Producing Activities ResultsOfOperationsExpenseFromOilAndGasProducingActivities	1153228000	USD
CY2014	us-gaap	Results Of Operations Expense From Oil And Gas Producing Activities ResultsOfOperationsExpenseFromOilAndGasProducingActivities	821206000	USD
CY2012	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	637893000	USD
CY2013	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	667050000	USD
CY2014	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	599673000	USD
CY2012	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-437595000	USD
CY2013	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-7471000	USD
CY2014	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-3933000	USD
CY2012	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	1075488000	USD
CY2013	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	674521000	USD
CY2014	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	603606000	USD
CY2012	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	524364000	USD
CY2013	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	548719000	USD
CY2014	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	377819000	USD
CY2012	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	116633000	USD
CY2013	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	66586000	USD
CY2014	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	76088000	USD
CY2012	us-gaap	Revenues Revenues	1934642000	USD
CY2013Q1	us-gaap	Revenues Revenues	511690000	USD
CY2013Q2	us-gaap	Revenues Revenues	512987000	USD
CY2013Q3	us-gaap	Revenues Revenues	493603000	USD
CY2013Q4	us-gaap	Revenues Revenues	465108000	USD
CY2013	us-gaap	Revenues Revenues	1983388000	USD
CY2014Q1	us-gaap	Revenues Revenues	443056000	USD
CY2014Q2	us-gaap	Revenues Revenues	374714000	USD
CY2014Q3	us-gaap	Revenues Revenues	394107000	USD
CY2014Q4	us-gaap	Revenues Revenues	346881000	USD
CY2014	us-gaap	Revenues Revenues	1558758000	USD
CY2012	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-530755000	USD
CY2013	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-296418000	USD
CY2014	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-77688000	USD
CY2012	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	1234918000	USD
CY2013	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	1271559000	USD
CY2014	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	1043060000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	42795000	USD
CY2013	us-gaap	Share Based Compensation ShareBasedCompensation	85270000	USD
CY2014	us-gaap	Share Based Compensation ShareBasedCompensation	19994000	USD
CY2012	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	143607000	USD
CY2013	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-217148000	USD
CY2014	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-163562000	USD
CY2012	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	624031000	USD
CY2013	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	-1822757000	USD
CY2014	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	70141000	USD
CY2011Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	5216337000	USD
CY2012Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	5840368000	USD
CY2013Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	4017611000	USD
CY2014Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	4087752000	USD
CY2012	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	542138000	USD
CY2013	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	0	USD
CY2014	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	0	USD
CY2014	us-gaap	Stock Issued During Period Value Conversion Of Convertible Securities StockIssuedDuringPeriodValueConversionOfConvertibleSecurities	0	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2013	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2014	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2014	us-gaap	Stock Repurchased And Retired During Period Shares StockRepurchasedAndRetiredDuringPeriodShares	27411000	shares
CY2014	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	111300000	USD
CY2014	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	111827000	USD
CY2013Q4	us-gaap	Stockholders Equity StockholdersEquity	1825810000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	1937825000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3862455000	USD
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3175627000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3209820000	USD
CY2012	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2013	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2014	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2013Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1319000	shares
CY2014Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1113000	shares
CY2013Q4	us-gaap	Treasury Stock Value TreasuryStockValue	8770000	USD
CY2014Q4	us-gaap	Treasury Stock Value TreasuryStockValue	6980000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2548950000	USD
CY2012	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	11312000	USD
CY2013	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	30126000	USD
CY2014	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	6373000	USD
CY2012	us-gaap	Unamortized Costs Capitalized Less Related Deferred Income Taxes Exceed Ceiling Limitation Expense UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense	0	USD
CY2013	us-gaap	Unamortized Costs Capitalized Less Related Deferred Income Taxes Exceed Ceiling Limitation Expense UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense	0	USD
CY2014	us-gaap	Unamortized Costs Capitalized Less Related Deferred Income Taxes Exceed Ceiling Limitation Expense UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense	164800000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1330000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1382000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	77000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	210000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	17000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2014	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1288000	USD
CY2013Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	100000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	300000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-100000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-100000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	262000	USD
CY2014	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2012	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	100288000	USD
CY2013	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	-3842000	USD
CY2014	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	0	USD
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	456015000	shares
CY2013	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	481148000	shares
CY2014	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	499743000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	453595000	shares
CY2013	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	481148000	shares
CY2014	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	479644000	shares
CY2014	us-gaap	Revenue Recognition Completed Contract Method RevenueRecognitionCompletedContractMethod	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The Company accounted for its construction contract, discussed in Note </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">11</font><font style="font-family:inherit;font-size:10pt;">, using the completed-contract method, under which contract revenues and costs are recognized when work under the contract is completed or substantially completed and assets have been transferred. In the interim, costs incurred on and billings related to contracts in process are accumulated on the balance sheet. Contract losses are recorded at the time it is determined that a loss will be incurred. Contract gains, if any, are recorded upon substantial completion of the construction project. </font></div></div>
CY2014	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;">Use of Estimates.</font><font style="font-family:inherit;font-size:10pt;"> The preparation of the consolidated financial statements in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.</font></div><div style="line-height:120%;padding-bottom:12px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The more significant areas requiring the use of assumptions, judgments and estimates include: oil, natural gas and NGL reserves; cash flow estimates used in impairment tests of long-lived assets; depreciation, depletion and amortization; asset retirement obligations; assignments of fair value and allocations of purchase price in connection with business combinations; determinations of significant alterations to the full cost pool and related estimates of fair value for allocations of divested oil and natural gas properties that result in substantial economic differences between the properties divested and the properties remaining; income taxes; valuation of derivative instruments; contingencies; and accrued revenue and related receivables. Although management believes these estimates are reasonable, actual results could differ significantly.</font></div></div>

Files In Submission

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$SD
SANDRIDGE ENERGY INC Stock $sd

2014 Form 10-K Financial Statement

#000134943615000082 Filed on February 27, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SD SANDRIDGE ENERGY INC Stock $sd

2014 Form 10-K Financial Statement

#000134943615000082 Filed on February 27, 2015

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SD
SANDRIDGE ENERGY INC Stock $sd