$SD
SANDRIDGE ENERGY INC Stock $sd

$sd Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-K Financial Statement

#000134943613000114 Filed on March 01, 2013

Income Statement

Concept	2012 Q4	2012	2011 Q4
Revenue	$1.338B	$1.935B	$373.8M
YoY Change	257.94%	36.7%	27.55%
Cost Of Revenue	$173.6M	$68.23M	$122.5M
YoY Change	41.71%	3.92%	11.77%
Gross Profit	$368.2M	$1.866B	$251.3M
YoY Change	46.52%	38.3%	36.95%
Gross Profit Margin	27.52%	96.47%	67.22%
Selling, General & Admin	$82.90M	$241.7M	$40.30M
YoY Change	105.71%	62.65%	-22.65%
% of Gross Profit	22.51%	12.95%	16.04%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$190.0M	$628.8M	$101.2M
YoY Change	87.75%	69.55%	22.96%
% of Gross Profit	51.6%	33.69%	40.27%
Operating Expenses	$282.2M	$899.4M	$143.9M
YoY Change	96.11%	70.05%	0.14%
Operating Profit	-$209.7M	$325.2M	-$339.5M
YoY Change	-38.23%	-24.2%	-952.91%
Interest Expense	-$66.20M	-$61.90M	-$502.3M
YoY Change	-86.82%	-67.96%	125.25%
% of Operating Profit		-19.03%
Other Income/Expense, Net	$1.100M	-$179.0M	$2.500M
YoY Change	-56.0%	-34.3%	400.0%
Pretax Income	-$294.5M	$146.2M	-$394.3M
YoY Change	-25.31%	-6.62%	112.9%
Income Tax	$0.00	-$100.4M	$200.0K
% Of Pretax Income		-68.64%
Net Earnings	-$294.5M	$141.6M	-$394.4M
YoY Change	-25.33%	31.01%	101.68%
Net Earnings / Revenue	-22.01%	7.32%	-105.51%
Basic Earnings Per Share	-$0.63	$0.19	-$0.97
Diluted Earnings Per Share	-$0.63	$0.19	-$0.97
COMMON SHARES
Basic Shares Outstanding	490.5M shares	453.6M shares
Diluted Shares Outstanding		456.0M shares

Balance Sheet

Concept	2012 Q4	2012	2011 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$309.8M	$309.8M	$207.7M
YoY Change	49.16%	49.16%	3420.34%
Cash & Equivalents	$309.8M	$309.8M	$207.7M
Short-Term Investments
Other Short-Term Assets	$19.04M	$387.6M	$2.755M
YoY Change	591.22%	1754.55%	-86.02%
Inventory	$3.618M		$6.903M
Prepaid Expenses	$31.32M		$14.10M
Receivables	$445.5M	$440.9M	$206.3M
Other Receivables	$4.600M	$4.600M	$0.00
Total Short-Term Assets	$1.143B	$1.143B	$441.8M
YoY Change	158.66%	158.69%	151.62%
LONG-TERM ASSETS
Property, Plant & Equipment	$582.4M	$8.480B	$522.3M
YoY Change	11.51%	57.35%	-88.97%
Goodwill	$0.00		$235.4M
YoY Change	-100.0%
Intangibles
YoY Change
Long-Term Investments		$10.30M	$7.100M
YoY Change		45.07%	47.92%
Other Assets	$144.3M	$146.1M	$98.62M
YoY Change	46.27%	5.79%	19.11%
Total Long-Term Assets	$8.648B	$8.648B	$5.778B
YoY Change	49.67%	49.67%	14.28%
TOTAL ASSETS
Total Short-Term Assets	$1.143B	$1.143B	$441.8M
Total Long-Term Assets	$8.648B	$8.648B	$5.778B
Total Assets	$9.791B	$9.791B	$6.220B
YoY Change	57.42%	57.42%	18.89%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$559.3M	$559.3M	$100.0K
YoY Change	559200.0%	49.63%	-87.5%
Accrued Expenses	$190.7M	$190.7M
YoY Change		63.83%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00		$1.051M
YoY Change	-100.0%		-85.6%
Total Short-Term Liabilities	$1.170B	$1.171B	$699.5M
YoY Change	67.33%	67.33%	28.47%
LONG-TERM LIABILITIES
Long-Term Debt	$4.301B	$4.301B	$2.813B
YoY Change	52.89%	52.9%	-3.06%
Other Long-Term Liabilities	$17.05M	$456.7M	$13.13M
YoY Change	29.8%	189.05%	-94.47%
Total Long-Term Liabilities	$4.318B	$4.758B	$2.826B
YoY Change	52.79%	60.14%	-9.98%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.170B	$1.171B	$699.5M
Total Long-Term Liabilities	$4.318B	$4.758B	$2.826B
Total Liabilities	$5.928B	$7.422B	$3.671B
YoY Change	61.5%	61.57%	-0.67%
SHAREHOLDERS EQUITY
Retained Earnings	-$2.851B		-$2.937B
YoY Change	-2.93%
Common Stock	$476.0K		$399.0K
YoY Change	19.3%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$8.602M		$6.158M
YoY Change	39.69%
Treasury Stock Shares	1.219M shares		874.0K shares
Shareholders Equity	$2.369B	$2.369B	$1.626B
YoY Change
Total Liabilities & Shareholders Equity	$9.791B	$9.791B	$6.220B
YoY Change	57.42%	57.42%	18.89%

Cashflow Statement

Concept	2012 Q4	2012	2011 Q4
OPERATING ACTIVITIES
Net Income	-$294.5M	$141.6M	-$394.4M
YoY Change	-25.33%	31.01%	101.68%
Depreciation, Depletion And Amortization	$190.0M	$628.8M	$101.2M
YoY Change	87.75%	69.55%	22.96%
Cash From Operating Activities	$199.0M	$783.2M	$137.4M
YoY Change	44.83%	70.64%	229.5%
INVESTING ACTIVITIES
Capital Expenditures	-$524.3M	-$2.987B	-$438.8M
YoY Change	19.48%	69.56%	28.68%
Acquisitions		$840.7M
YoY Change		2327.92%
Other Investing Activities	$9.000M	$0.00	$234.6M
YoY Change	-96.16%	-100.0%	131.13%
Cash From Investing Activities	-$515.3M	-$2.556B	-$204.1M
YoY Change	152.47%	183.26%	-14.75%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change		-100.0%
Debt Paid & Issued, Net		$366.0M
YoY Change		-82.82%
Cash From Financing Activities	-47.50M	$1.875B	-50.90M
YoY Change	-6.68%	190.59%	-125.32%
NET CHANGE
Cash From Operating Activities	199.0M	$783.2M	137.4M
Cash From Investing Activities	-515.3M	-$2.556B	-204.1M
Cash From Financing Activities	-47.50M	$1.875B	-50.90M
Net Change In Cash	-363.8M	$102.1M	-117.6M
YoY Change	209.35%	-49.42%	-3663.64%
FREE CASH FLOW
Cash From Operating Activities	$199.0M	$783.2M	$137.4M
Capital Expenditures	-$524.3M	-$2.987B	-$438.8M
Free Cash Flow	$723.3M	$3.770B	$576.2M
YoY Change	25.53%	69.78%	50.56%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	206336000	USD
CY2012Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	766544000	USD
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	506784000	USD
CY2011Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	313901000	USD
CY2012Q4	us-gaap	Accounts Payable And Other Accrued Liabilities Current AccountsPayableAndOtherAccruedLiabilitiesCurrent	461067000	USD
CY2012Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	451141000	USD
CY2011Q4	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	210242000	USD
CY2012Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	445506000	USD
CY2010	us-gaap	Accretion Of Discount AccretionOfDiscount	159971000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	284271000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	293465000	USD
CY2012	us-gaap	Accretion Of Discount AccretionOfDiscount	678200000	USD
CY2011	us-gaap	Accretion Of Discount AccretionOfDiscount	455501000	USD
CY2012Q4	us-gaap	Acquisition Costs Cumulative AcquisitionCostsCumulative	856290000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	5233019000	USD
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	4568856000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	47778000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	39066000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	47228000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Stock Issued Issuance Costs AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts	231000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	53000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	15000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	-16000	USD
CY2012	us-gaap	Advertising Expense AdvertisingExpense	11800000	USD
CY2010	us-gaap	Advertising Expense AdvertisingExpense	5400000	USD
CY2011	us-gaap	Advertising Expense AdvertisingExpense	4800000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	39700000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	36000000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	37700000	USD
CY2011	us-gaap	Allowance For Doubtful Accounts Receivable Charge Offs AllowanceForDoubtfulAccountsReceivableChargeOffs	108000	USD
CY2012	us-gaap	Allowance For Doubtful Accounts Receivable Charge Offs AllowanceForDoubtfulAccountsReceivableChargeOffs	6000	USD
CY2010	us-gaap	Allowance For Doubtful Accounts Receivable Charge Offs AllowanceForDoubtfulAccountsReceivableChargeOffs	2216000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	5635000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3906000	USD
CY2010Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1503000	USD
CY2009Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	3590000	USD
CY2011	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	2383000	USD
CY2012	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	2592000	USD
CY2010	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	2153000	USD
CY2011	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	11372000	USD
CY2010	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	11006000	USD
CY2012	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	14388000	USD
CY2012	us-gaap	Asset Impairment Charges AssetImpairmentCharges	316004000	USD
CY2011	us-gaap	Asset Impairment Charges AssetImpairmentCharges	2825000	USD
CY2010	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2010Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	119877000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	498410000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	128116000	USD
CY2009Q4	us-gaap	Asset Retirement Obligation AssetRetirementObligation	111137000	USD
CY2011	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	9368000	USD
CY2010	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	9421000	USD
CY2012	us-gaap	Asset Retirement Obligation Accretion Expense AssetRetirementObligationAccretionExpense	28996000	USD
CY2011Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	32906000	USD
CY2012Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	118504000	USD
CY2010Q4	us-gaap	Asset Retirement Obligation Current AssetRetirementObligationCurrent	25360000	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	5716000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	7479000	USD
CY2010	us-gaap	Asset Retirement Obligation Liabilities Incurred AssetRetirementObligationLiabilitiesIncurred	17347000	USD
CY2012	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	72200000	USD
CY2010	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	1011000	USD
CY2011	us-gaap	Asset Retirement Obligation Liabilities Settled AssetRetirementObligationLiabilitiesSettled	14419000	USD
CY2010	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	-17017000	USD
CY2012	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	34654000	USD
CY2011	us-gaap	Asset Retirement Obligation Revision Of Estimate AssetRetirementObligationRevisionOfEstimate	7574000	USD
CY2012Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	379906000	USD
CY2011Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	95210000	USD
CY2010Q4	us-gaap	Asset Retirement Obligations Noncurrent AssetRetirementObligationsNoncurrent	94517000	USD
CY2012Q4	us-gaap	Assets Assets	9790731000	USD
CY2011Q4	us-gaap	Assets Assets	6219609000	USD
CY2012Q4	us-gaap	Assets Current AssetsCurrent	1142885000	USD
CY2011Q4	us-gaap	Assets Current AssetsCurrent	441840000	USD
CY2012Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	205349000	USD
CY2011Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	133147000	USD
CY2012	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	122696000	USD
CY2010	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2011	us-gaap	Business Combination Bargain Purchase Gain Recognized Amount BusinessCombinationBargainPurchaseGainRecognizedAmount	0	USD
CY2011Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	4791534000	USD
CY2012Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	5231182000	USD
CY2010Q4	us-gaap	Capitalized Costs Accumulated Depreciation Depletion Amortization And Valuation Allowance For Relating To Oil And Gas Producing Activities CapitalizedCostsAccumulatedDepreciationDepletionAmortizationAndValuationAllowanceForRelatingToOilAndGasProducingActivities	4483736000	USD
CY2011Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	689393000	USD
CY2012Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	865863000	USD
CY2010Q4	us-gaap	Capitalized Costs Of Unproved Properties Excluded From Amortization Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationCumulative	547953000	USD
CY2012Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	12262921000	USD
CY2011Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	8969296000	USD
CY2010Q4	us-gaap	Capitalized Costs Proved Properties CapitalizedCostsProvedProperties	8159924000	USD
CY2012	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2011	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	0	USD
CY2010	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	39518000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	309766000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	207681000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7861000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5863000	USD
CY2011	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	201818000	USD
CY2012	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	102085000	USD
CY2010	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-1998000	USD
CY2012Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2011	us-gaap	Contract Revenue Cost ContractRevenueCost	0	USD
CY2010	us-gaap	Contract Revenue Cost ContractRevenueCost	0	USD
CY2010	us-gaap	Contributions From Noncontrolling Interests ContributionsFromNoncontrollingInterests	306000	USD
CY2011	us-gaap	Contributions From Noncontrolling Interests ContributionsFromNoncontrollingInterests	0	USD
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.001
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	800000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	800000000	shares
CY2010Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	800000000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	412827000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	491578000	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	490359000	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	411953000	shares
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	476000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	399000	USD
CY2012	us-gaap	Comparability Of Prior Year Financial Data ComparabilityOfPriorYearFinancialData	<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;">Reclassifications.</font><font style="font-family:inherit;font-size:10pt;"> Certain reclassifications have been made to the prior period financial statements to conform to the current period presentation. These reclassifications have no effect on the Company’s previously reported results of operations.</font></div></div>
CY2012	us-gaap	Construction Revenue ConstructionRevenue	796323000	USD
CY2011	us-gaap	Construction Revenue ConstructionRevenue	0	USD
CY2010	us-gaap	Construction Revenue ConstructionRevenue	0	USD
CY2012	us-gaap	Contract Revenue Cost ContractRevenueCost	796323000	USD
CY2012	us-gaap	Contributions From Noncontrolling Interests ContributionsFromNoncontrollingInterests	0	USD
CY2010	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	22368000	USD
CY2011	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	65654000	USD
CY2012	us-gaap	Cost Of Services Oil And Gas CostOfServicesOilAndGas	68227000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	2405769000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	938522000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	986200000	USD
CY2011Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	0	USD
CY2012Q4	us-gaap	Costs In Excess Of Billings On Uncompleted Contracts Or Programs Expected To Be Collected Within One Year CostsInExcessOfBillingsOnUncompletedContractsOrProgramsExpectedToBeCollectedWithinOneYear	11229000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	3964170000	USD
CY2010	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	2736900000	USD
CY2011	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties CostsIncurredAcquisitionOfOilAndGasProperties	1774303000	USD
CY2010	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	1346303000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	1761556000	USD
CY2011	us-gaap	Costs Incurred Acquisition Of Oil And Gas Properties With Proved Reserves CostsIncurredAcquisitionOfOilAndGasPropertiesWithProvedReserves	58190000	USD
CY2012	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	377185000	USD
CY2011	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	320361000	USD
CY2010	us-gaap	Costs Incurred Acquisition Of Unproved Oil And Gas Properties CostsIncurredAcquisitionOfUnprovedOilAndGasProperties	352648000	USD
CY2010	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1006232000	USD
CY2011	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1296903000	USD
CY2012	us-gaap	Costs Incurred Development Costs CostsIncurredDevelopmentCosts	1704991000	USD
CY2010	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	31717000	USD
CY2011	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	98849000	USD
CY2012	us-gaap	Costs Incurred Exploration Costs CostsIncurredExplorationCosts	120438000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-732000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	618000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-72000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-74000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1169000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	820000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	551000	USD
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-2000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1552000	USD
CY2012Q4	us-gaap	Customer Advances Current CustomerAdvancesCurrent	68742000	USD
CY2011Q4	us-gaap	Customer Advances Current CustomerAdvancesCurrent	36637000	USD
CY2012	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	410415000	USD
CY2010	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	258000	USD
CY2011	us-gaap	Decrease Due To Sales Of Minerals In Place DecreaseDueToSalesOfMineralsInPlace	558257000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-6447000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-97410000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-434117000	USD
CY2011Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	51724000	USD
CY2012Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	83643000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-447500000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-6986000	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
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-13383000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-539000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	39268000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	0	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	1114840000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	999424000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2011Q4	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	0	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	859328000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	556768000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards Subject To Expiration DeferredTaxAssetsOperatingLossCarryforwardsSubjectToExpiration	2300000000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2193000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2721000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	289148000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	0	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	9200000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	13935000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	14053000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	17713000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	11725000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	45762000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Asset Retirement Obligations DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAssetRetirementObligations	172229000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	557574000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	233819000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	24819000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	0	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	198424000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	0	USD
CY2011Q4	us-gaap	Deposit Liability Current DepositLiabilityCurrent	0	USD
CY2012Q4	us-gaap	Deposit Liability Current DepositLiabilityCurrent	255000000	USD
CY2012	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	628834000	USD
CY2012Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	71022000	USD
CY2010	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	316690000	USD
CY2011	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	370876000	USD
CY2011Q4	us-gaap	Derivative Assets Current DerivativeAssetsCurrent	4066000	USD
CY2011Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	26415000	USD
CY2012Q4	us-gaap	Derivative Assets Noncurrent DerivativeAssetsNoncurrent	23617000	USD
CY2011Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-134649000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	19992000	USD
CY2011Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	115435000	USD
CY2012Q4	us-gaap	Derivative Liabilities Current DerivativeLiabilitiesCurrent	14860000	USD
CY2011Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	49695000	USD
CY2012Q4	us-gaap	Derivative Liabilities Noncurrent DerivativeLiabilitiesNoncurrent	59787000	USD
CY2012	us-gaap	Direct Operating Costs DirectOperatingCosts	1431672000	USD
CY2010	us-gaap	Direct Operating Costs DirectOperatingCosts	381974000	USD
CY2011	us-gaap	Direct Operating Costs DirectOperatingCosts	498563000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	6864555000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	7000151000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves10 Percent Annual Discount For Estimated Timing Of Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves10PercentAnnualDiscountForEstimatedTimingOfCashFlows	5490171000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	23564771000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	29482544000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Cash Inflows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureCashInflows	26494942000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	2977993000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	3779761000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Development Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureDevelopmentCosts	4021051000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	3721509000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	4043953000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Income Tax Expense DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureIncomeTaxExpense	2392464000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	12080892000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	12840519000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Net Cash Flows DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureNetCashFlows	9173686000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts	8218860000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts	8899465000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Future Production Costs DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesFutureProductionCosts	7392104000	USD
CY2010	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	3683515000	USD
CY2012	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	5840368000	USD
CY2011	us-gaap	Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves Standardized Measure DiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReservesStandardizedMeasure	5216337000	USD
CY2011Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	16572000	USD
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.58
CY2012Q4	us-gaap	Dividends Payable Current DividendsPayableCurrent	16572000	USD
CY2012	us-gaap	Dividends Preferred Stock DividendsPreferredStock	55525000	USD
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.79
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.74
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.63
CY2010	us-gaap	Dividends Preferred Stock DividendsPreferredStock	37442000	USD
CY2011	us-gaap	Dividends Preferred Stock DividendsPreferredStock	55583000	USD
CY2012Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	978000	USD
CY2011Q4	us-gaap	Due From Related Parties Current DueFromRelatedPartiesCurrent	1645000	USD
CY2011Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	59000	USD
CY2012Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	982000	USD
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.19
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.13
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.41
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.39
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.49
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.97
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.19
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.13
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.16
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.79
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.58
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.97
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.46
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.63
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.39
CY2011Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	26402000	USD
CY2012Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	29811000	USD
CY2012Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	91000000	USD
CY2012	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y6M0D
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	53000	USD
CY2012	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	-16000	USD
CY2010	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	955540000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	15000	USD
CY2012Q4	us-gaap	Exploration Costs Cumulative ExplorationCostsCumulative	81940000	USD
CY2012	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	2092423000	USD
CY2011	us-gaap	Extensions Discoveries Additions And Improved Recovery Less Related Costs ExtensionsDiscoveriesAdditionsAndImprovedRecoveryLessRelatedCosts	1812167000	USD
CY2012	us-gaap	Fair Value Level3 Transfers Out Description FairValueLevel3TransfersOutDescription	During the years ended December 31, 2012 and 2010, the Company did not have any transfers between Level 1, Level 2 or Level 3 fair value measurements.
CY2011	us-gaap	Fair Value Level3 Transfers Out Description FairValueLevel3TransfersOutDescription	Fair values related to the Company’s oil and natural gas fixed price swaps, natural gas collars and interest rate swap were transferred from Level 3 to Level 2 in the fourth quarter of 2011 due to enhancements to the Company’s internal valuation process, including the use of observable inputs to assess the fair value.
CY2012	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-3089000	USD
CY2010	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	-2424000	USD
CY2011	us-gaap	Gain Loss On Sale Of Property Plant Equipment GainLossOnSaleOfPropertyPlantEquipment	2044000	USD
CY2012	us-gaap	Gain Or Loss On Sale Of Previously Unissued Stock By Subsidiary GainOrLossOnSaleOfPreviouslyUnissuedStockBySubsidiary	0	USD
CY2010	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2012	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-3075000	USD
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-38232000	USD
CY2011	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	66007000	USD
CY2012	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	39669000	USD
CY2010	us-gaap	Gas Gathering Transportation Marketing And Processing Costs GasGatheringTransportationMarketingAndProcessingCosts	90149000	USD
CY2010	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	100118000	USD
CY2012	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	40486000	USD
CY2011	us-gaap	Gas Gathering Transportation Marketing And Processing Revenue GasGatheringTransportationMarketingAndProcessingRevenue	66690000	USD
CY2011Q4	us-gaap	Gas Imbalance Asset Liability GasImbalanceAssetLiability	-1700000	USD
CY2012Q4	us-gaap	Gas Imbalance Asset Liability GasImbalanceAssetLiability	-3600000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	241682000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	179565000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	148643000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	235396000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	0	USD
CY2012Q3	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2012Q4	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	235396000	USD
CY2011	us-gaap	Goodwill Purchase Accounting Adjustments GoodwillPurchaseAccountingAdjustments	1000000	USD
CY2012	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2010	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2011	us-gaap	Impairment Of Oil And Gas Properties ImpairmentOfOilAndGasProperties	0	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-251670000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	156571000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	146209000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-446680000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-100362000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5817000	USD
CY2012	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-66429000	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	69664000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-51631000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-88085000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	51173000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	6394000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	7247000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	54800000	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	5507000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5231000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1324000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	71885000	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	0	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	8229000	USD
CY2012	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	7172000	USD
CY2010	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	9940000	USD
CY2011	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-4539000	USD
CY2010	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	3576000	USD
CY2012	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-348000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	8913000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1659000	USD
CY2011	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	0	USD
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-1508000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2083000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	51522000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	121889000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	42122000	USD
CY2012	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-84361000	USD
CY2011	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-16531000	USD
CY2010	us-gaap	Increase Decrease In Asset Retirement Obligations IncreaseDecreaseInAssetRetirementObligations	-9234000	USD
CY2010	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-61180000	USD
CY2012	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-89003000	USD
CY2011	us-gaap	Increase Decrease In Billing In Excess Of Cost Of Earnings IncreaseDecreaseInBillingInExcessOfCostOfEarnings	-11013000	USD
CY2011	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	87080000	USD
CY2010	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-910934000	USD
CY2012	us-gaap	Increase Decrease In Estimated Future Development Costs IncreaseDecreaseInEstimatedFutureDevelopmentCosts	-45397000	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
CY2011	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-833841000	USD
CY2010	us-gaap	Increase Decrease In Future Income Tax Expense Estimates On Future Cash Flows Related To Proved Oil And Gas Reserves IncreaseDecreaseInFutureIncomeTaxExpenseEstimatesOnFutureCashFlowsRelatedToProvedOilAndGasReserves	-825668000	USD
CY2012	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-3111000	USD
CY2011	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	2998000	USD
CY2010	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	238000	USD
CY2011	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-71000	USD
CY2010	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	-8079000	USD
CY2012	us-gaap	Increase Decrease In Other Current Assets IncreaseDecreaseInOtherCurrentAssets	10649000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-2667000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-34447000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	35773000	USD
CY2012	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	141534000	USD
CY2011	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	61645000	USD
CY2010	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	11480000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2010	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	0	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	255000000	USD
CY2010	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	1133413000	USD
CY2012	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	1708301000	USD
CY2011	us-gaap	Increase Due To Purchases Of Minerals In Place IncreaseDueToPurchasesOfMineralsInPlace	44934000	USD
CY2010	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	18423000	shares
CY2012	us-gaap	Interest Paid Net InterestPaidNet	257152000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	210112000	USD
CY2012Q4	us-gaap	Interest Payable Current InterestPayableCurrent	92125000	USD
CY2011Q4	us-gaap	Interest Payable Current InterestPayableCurrent	53388000	USD
CY2012Q4	us-gaap	Inventory Net InventoryNet	3618000	USD
CY2011Q4	us-gaap	Inventory Net InventoryNet	6903000	USD
CY2011	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Conversion Of Preferred Stock IncrementalCommonSharesAttributableToConversionOfPreferredStock	0	shares
CY2010	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	5057000	shares
CY2011	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	7794000	shares
CY2012	us-gaap	Incremental Common Shares Attributable To Nonvested Shares With Forfeitable Dividends IncrementalCommonSharesAttributableToNonvestedSharesWithForfeitableDividends	2420000	shares
CY2011Q4	us-gaap	Insurance Settlements Receivable Current InsuranceSettlementsReceivableCurrent	0	USD
CY2012Q4	us-gaap	Insurance Settlements Receivable Current InsuranceSettlementsReceivableCurrent	4590000	USD
CY2011	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-237332000	USD
CY2012	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-303349000	USD
CY2010	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-247442000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	224127000	USD
CY2012Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	300000	USD
CY2011Q4	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	200000	USD
CY2012Q4	us-gaap	Land Land	17927000	USD
CY2011Q4	us-gaap	Land Land	14196000	USD
CY2011	us-gaap	Lease Operating Expense LeaseOperatingExpense	322877000	USD
CY2010	us-gaap	Lease Operating Expense LeaseOperatingExpense	237863000	USD
CY2012	us-gaap	Lease Operating Expense LeaseOperatingExpense	477154000	USD
CY2012Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	30200000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	3670659000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	5928276000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	9790731000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	6219609000	USD
CY2012Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1170454000	USD
CY2011Q4	us-gaap	Liabilities Current LiabilitiesCurrent	699496000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	4301083000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	2814176000	USD
CY2012Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	0	USD
CY2011Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	1051000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	4000000000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	365500000	USD
CY2012Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	4301083000	USD
CY2011Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2813125000	USD
CY2012	us-gaap	Loss On Contracts LossOnContracts	50000000	USD
CY2011	us-gaap	Loss On Contracts LossOnContracts	25000000	USD
CY2010	us-gaap	Loss On Contracts LossOnContracts	105000000	USD
CY2012Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	643370000	USD
CY2011Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	668391000	USD
CY2012Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	10348000	USD
CY2011Q4	us-gaap	Marketable Securities Noncurrent MarketableSecuritiesNoncurrent	7138000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	1493602000	USD
CY2011Q4	us-gaap	Minority Interest MinorityInterest	922939000	USD
CY2011	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	60200000	USD
CY2012	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	181727000	USD
CY2010	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3515000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1874870000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	570627000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	645193000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-953519000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-902329000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-2555945000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	380894000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	458954000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	783160000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	141571000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	190565000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	108065000	USD
CY2010	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	4445000	USD
CY2011	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	54323000	USD
CY2012	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	105000000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	153123000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86046000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	52482000	USD
CY2012Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-301785000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-232059000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-184301000	USD
CY2011Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-388597000	USD
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	804191000	USD
CY2011Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	196135000	USD
CY2011Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-316284000	USD
CY2011Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	561228000	USD
CY2010	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	967967000	USD
CY2012	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	-2555391000	USD
CY2011	us-gaap	Net Increase Decrease In Sales And Transfer Prices And Production Costs NetIncreaseDecreaseInSalesAndTransferPricesAndProductionCosts	1264736000	USD
CY2012	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-178987000	USD
CY2010	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-244884000	USD
CY2011	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-272442000	USD
CY2012Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	13128784000	USD
CY2010Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	8707877000	USD
CY2012Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	7897602000	USD
CY2011Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	4867155000	USD
CY2012Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	11433000	USD
CY2011Q4	us-gaap	Notes And Loans Receivable Net Noncurrent NotesAndLoansReceivableNetNoncurrent	0	USD
CY2011Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	49688000	USD
CY2012Q4	us-gaap	Oil And Gas Joint Interest Billing Receivables Current OilAndGasJointInterestBillingReceivablesCurrent	202405000	USD
CY2011Q4	us-gaap	Oil And Gas Property Full Cost Method Gross OilAndGasPropertyFullCostMethodGross	9658689000	USD
CY2010Q4	us-gaap	Oil And Gas Property Full Cost Method Net OilAndGasPropertyFullCostMethodNet	4224141000	USD
CY2012	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	1759282000	USD
CY2010	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	774763000	USD
CY2011	us-gaap	Oil And Gas Sales Revenue OilAndGasSalesRevenue	1226794000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	429013000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	325196000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	-6786000	USD
CY2011Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-207828000	USD
CY2012Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-75871000	USD
CY2012Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	762413000	USD
CY2011Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	696582000	USD
CY2011Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	279716000	USD
CY2012Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-151656000	USD
CY2012Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-209690000	USD
CY2011Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-339457000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	10813000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	2694000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	1339000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	2018000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	2251000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	2511000	USD
CY2011Q4	us-gaap	Other Assets Current OtherAssetsCurrent	2755000	USD
CY2012Q4	us-gaap	Other Assets Current OtherAssetsCurrent	15425000	USD
CY2011Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	9658000	USD
CY2012Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	30272000	USD
CY2012Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	4568000	USD
CY2011Q4	us-gaap	Other Assets Miscellaneous Noncurrent OtherAssetsMiscellaneousNoncurrent	2232000	USD
CY2012Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	116305000	USD
CY2011Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	98622000	USD
CY2011	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	53630000	USD
CY2012	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	60805000	USD
CY2010	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	50776000	USD
CY2011Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	44371000	USD
CY2012Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	15546000	USD
CY2012Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	17046000	USD
CY2011Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	13133000	USD
CY2010	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	2558000	USD
CY2012	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	4741000	USD
CY2011	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	3122000	USD
CY2012	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-1537000	USD
CY2011	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	155000	USD
CY2010	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-460000	USD
CY2010	us-gaap	Other Operating Income OtherOperatingIncome	28312000	USD
CY2011	us-gaap	Other Operating Income OtherOperatingIncome	18431000	USD
CY2012	us-gaap	Other Operating Income OtherOperatingIncome	18241000	USD
CY2011Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	2289000	USD
CY2012Q4	us-gaap	Other Receivables Gross Current OtherReceivablesGrossCurrent	4267000	USD
CY2011	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	-6538000	USD
CY2010	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	-3356000	USD
CY2012	us-gaap	Payments For Proceeds From Derivative Instrument Financing Activities PaymentsForProceedsFromDerivativeInstrumentFinancingActivities	34518000	USD
CY2011	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	34628000	USD
CY2012	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2010	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-15095000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	13796000	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7169000	USD
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	14723000	USD
CY2010	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2011	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	30338000	USD
CY2012	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	844000	USD
CY2011	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	20326000	USD
CY2010	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	12540000	USD
CY2012	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	48538000	USD
CY2012	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	55525000	USD
CY2010	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	28525000	USD
CY2011	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	56742000	USD
CY2012	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	840740000	USD
CY2010	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	138428000	USD
CY2011	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	34628000	USD
CY2010	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1035137000	USD
CY2012	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	2146372000	USD
CY2011	us-gaap	Payments To Acquire Productive Assets PaymentsToAcquireProductiveAssets	1727106000	USD
CY2011	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	55583000	USD
CY2010	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	37442000	USD
CY2012	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	55525000	USD
CY2011Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.001
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	50000000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	7650000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	7650000	shares
CY2011Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	14099000	USD
CY2012Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	31319000	USD
CY2012	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	-766943000	USD
CY2010	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	-366539000	USD
CY2011	us-gaap	Previously Estimated Development Costs Incurred During Period PreviouslyEstimatedDevelopmentCostsIncurredDuringPeriod	-575546000	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2117914000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	2033000000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	1850344000	USD
CY2010	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	0	USD
CY2011	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	917528000	USD
CY2012	us-gaap	Proceeds From Other Equity ProceedsFromOtherEquity	587086000	USD
CY2012	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-98639000	USD
CY2010	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-48072000	USD
CY2011	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-58100000	USD
CY2011	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	859405000	USD
CY2010	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	204951000	USD
CY2012	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	431167000	USD
CY2012Q4	us-gaap	Production Costs Cumulative ProductionCostsCumulative	72400000	USD
CY2011Q4	us-gaap	Production Costs Cumulative ProductionCostsCumulative	231300000	USD
CY2012	us-gaap	Production Tax Expense ProductionTaxExpense	47210000	USD
CY2010	us-gaap	Production Tax Expense ProductionTaxExpense	29170000	USD
CY2011	us-gaap	Production Tax Expense ProductionTaxExpense	46069000	USD
CY2011	us-gaap	Profit Loss ProfitLoss	162388000	USD
CY2012	us-gaap	Profit Loss ProfitLoss	246571000	USD
CY2010	us-gaap	Profit Loss ProfitLoss	195010000	USD
CY2012Q2	us-gaap	Profit Loss ProfitLoss	917076000	USD
CY2011Q4	us-gaap	Profit Loss ProfitLoss	-394448000	USD
CY2012Q4	us-gaap	Profit Loss ProfitLoss	-294529000	USD
CY2011Q1	us-gaap	Profit Loss ProfitLoss	-302338000	USD
CY2011Q2	us-gaap	Profit Loss ProfitLoss	223170000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	-159752000	USD
CY2012Q1	us-gaap	Profit Loss ProfitLoss	-216224000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	636004000	USD
CY2010	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	1120419000	USD
CY2012	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	2173982000	USD
CY2011	us-gaap	Property Plant And Equipment Additions PropertyPlantAndEquipmentAdditions	1816494000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	866646000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	815734000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	582375000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	522269000	USD
CY2011	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	2511000	USD
CY2010	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	129000	USD
CY2012	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1735000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	1789919000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	366029000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2130293000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	255000000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	0	USD
CY2012Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	27947000	USD
CY2011Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	27912000	USD
CY2012	us-gaap	Results Of Operations Accretion Of Asset Retirement Obligations ResultsOfOperationsAccretionOfAssetRetirementObligations	28996000	USD
CY2011	us-gaap	Results Of Operations Accretion Of Asset Retirement Obligations ResultsOfOperationsAccretionOfAssetRetirementObligations	9368000	USD
CY2010	us-gaap	Results Of Operations Accretion Of Asset Retirement Obligations ResultsOfOperationsAccretionOfAssetRetirementObligations	9421000	USD
CY2011	us-gaap	Results Of Operations Expense From Oil And Gas Producing Activities ResultsOfOperationsExpenseFromOilAndGasProducingActivities	695560000	USD
CY2012	us-gaap	Results Of Operations Expense From Oil And Gas Producing Activities ResultsOfOperationsExpenseFromOilAndGasProducingActivities	1121389000	USD
CY2010	us-gaap	Results Of Operations Expense From Oil And Gas Producing Activities ResultsOfOperationsExpenseFromOilAndGasProducingActivities	542368000	USD
CY2010	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	232395000	USD
CY2011	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	531234000	USD
CY2012	us-gaap	Results Of Operations Income Before Income Taxes ResultsOfOperationsIncomeBeforeIncomeTaxes	637893000	USD
CY2012	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-437595000	USD
CY2010	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-405413000	USD
CY2012	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	12800000	USD
CY2011	us-gaap	Results Of Operations Income Tax Expense ResultsOfOperationsIncomeTaxExpense	-20134000	USD
CY2010	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	637808000	USD
CY2011	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	551368000	USD
CY2012	us-gaap	Results Of Operations Oil And Gas Producing Activities Net Income Excluding Corporate Overhead And Interest Costs ResultsOfOperationsOilAndGasProducingActivitiesNetIncomeExcludingCorporateOverheadAndInterestCosts	1075488000	USD
CY2012	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	524364000	USD
CY2010	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	267033000	USD
CY2011	us-gaap	Results Of Operations Production Or Lifting Costs ResultsOfOperationsProductionOrLiftingCosts	368946000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-2937094000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-2851048000	USD
CY2010	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	15700000	USD
CY2011	us-gaap	Revenue From Related Parties RevenueFromRelatedParties	21500000	USD
CY2012	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	116633000	USD
CY2011	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	103298000	USD
CY2010	us-gaap	Revenue Oil And Gas Services RevenueOilAndGasServices	28543000	USD
CY2012	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 accounts for its </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">two</font><font style="font-family:inherit;font-size:10pt;"> construction contracts, discussed in Note </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">12</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 gains or losses are recorded as development costs within the Company’s oil and natural gas properties as part of the full cost pool. Contract losses are recorded at the time it is determined that a loss will be incurred. Contract gains, if any, are recorded at the end of the project.</font></div></div>
CY2010	us-gaap	Revenues Revenues	931736000	USD
CY2012	us-gaap	Revenues Revenues	2730965000	USD
CY2011	us-gaap	Revenues Revenues	1415213000	USD
CY2011Q3	us-gaap	Revenues Revenues	363753000	USD
CY2011Q4	us-gaap	Revenues Revenues	373838000	USD
CY2011Q1	us-gaap	Revenues Revenues	312848000	USD
CY2012Q4	us-gaap	Revenues Revenues	1338098000	USD
CY2011Q2	us-gaap	Revenues Revenues	364774000	USD
CY2012Q2	us-gaap	Revenues Revenues	478434000	USD
CY2012Q3	us-gaap	Revenues Revenues	532798000	USD
CY2012Q1	us-gaap	Revenues Revenues	381635000	USD
CY2010	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	-423332000	USD
CY2011	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	-407284000	USD
CY2012	us-gaap	Revenues From Transactions With Other Operating Segments Of Same Entity RevenuesFromTransactionsWithOtherOperatingSegmentsOfSameEntity	-340939000	USD
CY2010	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	773132000	USD
CY2012	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-530755000	USD
CY2011	us-gaap	Revisions Of Previous Quantity Estimates RevisionsOfPreviousQuantityEstimates	-345965000	USD
CY2012	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	1234918000	USD
CY2010	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	507730000	USD
CY2011	us-gaap	Sales And Transfers Of Oil And Gas Produced Net Of Production Costs SalesAndTransfersOfOilAndGasProducedNetOfProductionCosts	857848000	USD
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	9.17
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	7604000	shares
CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	874000	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	12.74
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	8.54
CY2012	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	3071904000	USD
CY2010	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	1355068000	USD
CY2011	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	1822497000	USD
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	38684000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	37681000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	42795000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	1268000	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	823000	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	443000	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	8003000	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	6210000	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	8.95
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	7.87
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	7.46
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	13386000	shares
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	5322000	shares
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	9476000	shares
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	15328000	shares
CY2011Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	9.34
CY2009Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	16.80
CY2010Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	10.89
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	8.07
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	4394000	shares
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	1613000	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	3270000	shares
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	30200000	USD
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	17500000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	32100000	USD
CY2012	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	10.73
CY2011	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	12.91
CY2010	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	18.28
CY2012Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	9900000	shares
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	1219000	shares
CY2012Q4	sd	Drilling Carry Received Or Billed Cumulative DrillingCarryReceivedOrBilledCumulative	386500000	USD
CY2010	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesSettlements	216192000	USD
CY2010Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	3683515000	USD
CY2012Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	5840368000	USD
CY2011Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	5216337000	USD
CY2012Q4	sd	Production Tax Credit Receivables Current ProductionTaxCreditReceivablesCurrent	2265000	USD
CY2012Q4	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilities	-512000	USD
CY2012	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Gains Losses FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesGainsLosses	-5460000	USD
CY2012Q4	us-gaap	Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Estimated Range Of Change Upper Bound SignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleEstimatedRangeOfChangeUpperBound	1000000	USD
CY2012	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	143607000	USD
CY2010	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	10565000	USD
CY2011	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Other StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesOther	-111231000	USD
CY2012	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	624031000	USD
CY2010	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	2122537000	USD
CY2011	us-gaap	Standardized Measure Of Discounted Future Net Cash Flow Of Proved Oil And Gas Reserves Period Increase Decrease StandardizedMeasureOfDiscountedFutureNetCashFlowOfProvedOilAndGasReservesPeriodIncreaseDecrease	1532822000	USD
CY2009Q4	us-gaap	Standardized Measure Of Discounted Future Net Cash Flows Relating To Proved Oil And Gas Reserves StandardizedMeasureOfDiscountedFutureNetCashFlowsRelatingToProvedOilAndGasReserves	1560978000	USD
CY2010	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	1246334000	USD
CY2012	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	542138000	USD
CY2011	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	0	USD
CY2010	us-gaap	Stock Issued During Period Value Other StockIssuedDuringPeriodValueOther	290704000	USD
CY2011	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2012	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2010	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	2368853000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	1626011000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3862455000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2548950000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1547483000	USD
CY2009Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	-195905000	USD
CY2011	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2010	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-283604000	USD
CY2012	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	217755000	USD
CY2011	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	101034000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1300000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1800000	USD
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	291869000	shares
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	453595000	shares
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	398851000	shares
CY2012	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2010	us-gaap	Treasury Stock Retired Cost Method Amount TreasuryStockRetiredCostMethodAmount	0	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	210000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	180000	USD
CY2010	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	70000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	30000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	110000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	900000	USD
CY2011Q4	sd	Additional Paid In Capital Stockholder Receivable AdditionalPaidInCapitalStockholderReceivable	0	USD
CY2012Q4	sd	Additional Paid In Capital Stockholder Receivable AdditionalPaidInCapitalStockholderReceivable	5000000	USD
CY2012	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1500000	shares
CY2011	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1200000	shares
CY2010	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	800000	shares
CY2012	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	1500000	shares
CY2011	us-gaap	Treasury Stock Shares Retired TreasuryStockSharesRetired	1200000	shares
CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	6158000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	8602000	USD
CY2012	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	11312000	USD
CY2011	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	10834000	USD
CY2010	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	6275000	USD
CY2012	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 and natural gas reserves; cash flow estimates used in impairment tests of goodwill and other long-lived assets; depreciation, depletion and amortization; asset retirement obligations; assigning fair value and allocating purchase price in connection with business combinations; income taxes; valuation of derivative instruments; and accrued revenue and related receivables. Although management believes these estimates are reasonable, actual results could significantly differ from these estimates.</font></div></div>
CY2012Q4	us-gaap	Valuation Allowance Amount ValuationAllowanceAmount	557266000	USD
CY2011Q4	us-gaap	Valuation Allowance Amount ValuationAllowanceAmount	765605000	USD
CY2011	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	2511000	USD
CY2010	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	129000	USD
CY2012	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	1735000	USD
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	315349000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	406645000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	456015000	shares
CY2011Q4	sd	Deferred Tax Assets Alternative Minimum Tax And Other Carryforwards DeferredTaxAssetsAlternativeMinimumTaxAndOtherCarryforwards	39979000	USD
CY2012Q4	sd	Deferred Tax Assets Alternative Minimum Tax And Other Carryforwards DeferredTaxAssetsAlternativeMinimumTaxAndOtherCarryforwards	42242000	USD
CY2012Q4	sd	Deferred Tax Assets Litigation Settlement DeferredTaxAssetsLitigationSettlement	7200000	USD
CY2012Q4	sd	Cumulative Proceeds From Sale Of Working Interest Subject To Drilling Carry CumulativeProceedsFromSaleOfWorkingInterestSubjectToDrillingCarry	559500000	USD
CY2012Q4	sd	Debt Issuance Cost Cumulative DebtIssuanceCostCumulative	94100000	USD
CY2010	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Gains Losses FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesGainsLosses	-67412000	USD
CY2011	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Gains Losses FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesGainsLosses	40907000	USD
CY2011	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Level3 Transfers Out Of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesLevel3TransfersOutOf	-117268000	USD
CY2012	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesPurchases	5697000	USD
CY2011	sd	Depreciation Amortization Accretion And Asset Impairment DepreciationAmortizationAccretionAndAssetImpairment	383069000	USD
CY2010	sd	Depreciation Depletion Amortization And Accretion DepreciationDepletionAmortizationAndAccretion	326111000	USD
CY2012	sd	Depreciation Depletion Amortization And Accretion DepreciationDepletionAmortizationAndAccretion	657830000	USD
CY2012Q4	sd	Earliest Tax Year Open Due To Net Operating Loss EarliestTaxYearOpenDueToNetOperatingLoss	2003
CY2011Q4	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilities	-4252000	USD
CY2009Q4	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilities	37854000	USD
CY2010Q4	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilities	-222554000	USD
CY2010	sd	Asset Retirement Obligation Liabilities Assumed In Acquisition AssetRetirementObligationLiabilitiesAssumedInAcquisition	0	USD
CY2012	sd	Asset Retirement Obligation Liabilities Assumed In Acquisition AssetRetirementObligationLiabilitiesAssumedInAcquisition	371365000	USD
CY2011	sd	Asset Retirement Obligation Liabilities Assumed In Acquisition AssetRetirementObligationLiabilitiesAssumedInAcquisition	0	USD
CY2012	sd	Average Depreciation And Depletion Rate AverageDepreciationAndDepletionRate	16.93
CY2010	sd	Average Depreciation And Depletion Rate AverageDepreciationAndDepletionRate	13.24
CY2011	sd	Average Depreciation And Depletion Rate AverageDepreciationAndDepletionRate	13.57
CY2012Q4	sd	Billings And Estimated Contract Loss In Excess Of Costs Incurred BillingsAndEstimatedContractLossInExcessOfCostsIncurred	15546000	USD
CY2011Q4	sd	Billings And Estimated Contract Loss In Excess Of Costs Incurred BillingsAndEstimatedContractLossInExcessOfCostsIncurred	43320000	USD
CY2011	sd	Depreciation Depletion Amortization And Accretion DepreciationDepletionAmortizationAndAccretion	380244000	USD
CY2010	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesPurchases	23196000	USD
CY2012	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesSettlements	-3503000	USD
CY2012Q4	sd	Capitalized Costs Of Unproved Properties Excluded From Amortization Including Pipe Inventory Cost And Estimated Current Loss Cumulative CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationIncludingPipeInventoryCostAndEstimatedCurrentLossCumulative	938230000	USD
CY2010Q4	sd	Capitalized Internal Costs CapitalizedInternalCosts	28600000	USD
CY2012Q4	sd	Capitalized Internal Costs CapitalizedInternalCosts	61300000	USD
CY2011Q4	sd	Capitalized Internal Costs CapitalizedInternalCosts	37100000	USD
CY2010	sd	Cash Contribution From Noncontrolling Interest CashContributionFromNoncontrollingInterest	306000	USD
CY2011	sd	Cash Distribution To Noncontrolling Interest CashDistributionToNoncontrollingInterest	60200000	USD
CY2012	sd	Cash Distribution To Noncontrolling Interest CashDistributionToNoncontrollingInterest	181727000	USD
CY2010	sd	Cash Distribution To Noncontrolling Interest CashDistributionToNoncontrollingInterest	3515000	USD
CY2012	sd	Cash Distribution To Owners CashDistributionToOwners	181727000	USD
CY2011	sd	Cash Distribution To Owners CashDistributionToOwners	60200000	USD
CY2011	sd	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	89388000	USD
CY2012	sd	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	27610000	USD
CY2010	sd	Change In Accrued Capital Expenditures ChangeInAccruedCapitalExpenditures	85282000	USD
CY2012	sd	Completion Of Evaluation Activities On Unproved Properties CompletionOfEvaluationActivitiesOnUnprovedProperties	P10Y
CY2012Q4	sd	Development Advances Noncurrent DevelopmentAdvancesNoncurrent	0	USD
CY2011Q4	sd	Development Advances Noncurrent DevelopmentAdvancesNoncurrent	16777000	USD
CY2011Q4	sd	Deferred Tax Assets Litigation Settlement DeferredTaxAssetsLitigationSettlement	0	USD
CY2011Q4	sd	Deferred Tax Liabilities Equity Investments DeferredTaxLiabilitiesEquityInvestments	233819000	USD
CY2012Q4	sd	Deferred Tax Liabilities Equity Investments DeferredTaxLiabilitiesEquityInvestments	334331000	USD
CY2012	sd	Deposit Received On Pending Asset Sale DepositReceivedOnPendingAssetSale	0	USD
CY2011	sd	Deposit Received On Pending Asset Sale DepositReceivedOnPendingAssetSale	0	USD
CY2010	sd	Deposit Received On Pending Asset Sale DepositReceivedOnPendingAssetSale	10000000	USD
CY2010	sd	Depreciation Amortization Accretion And Asset Impairment DepreciationAmortizationAccretionAndAssetImpairment	326111000	USD
CY2010	sd	Gain Loss On Commodity Derivative Instruments Net Pre Tax GainLossOnCommodityDerivativeInstrumentsNetPreTax	-50872000	USD
CY2010	sd	Proceeds From Sale Of Royalty Trust Units ProceedsFromSaleOfRoyaltyTrustUnits	0	USD
CY2011	sd	Proceeds From Sale Of Royalty Trust Units ProceedsFromSaleOfRoyaltyTrustUnits	0	USD
CY2012	sd	Proceeds From Sale Of Royalty Trust Units ProceedsFromSaleOfRoyaltyTrustUnits	139360000	USD
CY2011Q4	sd	Production Payable Current ProductionPayableCurrent	59825000	USD
CY2012Q4	sd	Production Payable Current ProductionPayableCurrent	97245000	USD
CY2011	sd	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset And Liabilities Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetAndLiabilitiesSettlements	-60127000	USD
CY2011	sd	Gain Loss On Commodity Derivative Instruments Net Pre Tax GainLossOnCommodityDerivativeInstrumentsNetPreTax	44075000	USD
CY2012	sd	Gain Loss On Commodity Derivative Instruments Net Pre Tax GainLossOnCommodityDerivativeInstrumentsNetPreTax	241419000	USD
CY2011	sd	Income Tax Expense Benefit Attributable To Noncontrolling Interest IncomeTaxExpenseBenefitAttributableToNoncontrollingInterest	109000	USD
CY2012	sd	Income Tax Expense Benefit Attributable To Noncontrolling Interest IncomeTaxExpenseBenefitAttributableToNoncontrollingInterest	304000	USD
CY2010	sd	Income Tax Expense Benefit Attributable To Noncontrolling Interest IncomeTaxExpenseBenefitAttributableToNoncontrollingInterest	115000	USD
CY2012	sd	Income Tax Expense Benefit Attributable To Parent IncomeTaxExpenseBenefitAttributableToParent	-100666000	USD
CY2010	sd	Income Tax Expense Benefit Attributable To Parent IncomeTaxExpenseBenefitAttributableToParent	-446795000	USD
CY2011	sd	Income Tax Expense Benefit Attributable To Parent IncomeTaxExpenseBenefitAttributableToParent	-5926000	USD
CY2010	sd	Income Tax Reconciliation Taxes Attributable To Bargain Purchase Gain IncomeTaxReconciliationTaxesAttributableToBargainPurchaseGain	0	USD
CY2011	sd	Income Tax Reconciliation Taxes Attributable To Bargain Purchase Gain IncomeTaxReconciliationTaxesAttributableToBargainPurchaseGain	0	USD
CY2012	sd	Income Tax Reconciliation Taxes Attributable To Bargain Purchase Gain IncomeTaxReconciliationTaxesAttributableToBargainPurchaseGain	42944000	USD
CY2011	sd	Income Tax Reconciliation Taxes Attributable To Noncontrolling Interests IncomeTaxReconciliationTaxesAttributableToNoncontrollingInterests	19120000	USD
CY2010	sd	Income Tax Reconciliation Taxes Attributable To Noncontrolling Interests IncomeTaxReconciliationTaxesAttributableToNoncontrollingInterests	1556000	USD
CY2012	sd	Income Tax Reconciliation Taxes Attributable To Noncontrolling Interests IncomeTaxReconciliationTaxesAttributableToNoncontrollingInterests	37047000	USD
CY2011Q4	sd	Investments In Subsidiaries InvestmentsInSubsidiaries	0	USD
CY2012Q4	sd	Investments In Subsidiaries InvestmentsInSubsidiaries	0	USD
CY2011	sd	Issuance Of Royalty Trust Units Value IssuanceOfRoyaltyTrustUnitsValue	917528000	USD
CY2012	sd	Issuance Of Royalty Trust Units Value IssuanceOfRoyaltyTrustUnitsValue	587086000	USD
CY2011Q4	sd	Lease Broker Advances Noncurrent LeaseBrokerAdvancesNoncurrent	13086000	USD
CY2012Q4	sd	Lease Broker Advances Noncurrent LeaseBrokerAdvancesNoncurrent	0	USD
CY2011Q4	sd	Production Tax Credit Receivables Current ProductionTaxCreditReceivablesCurrent	3331000	USD
CY2011Q4	sd	Production Tax Credit Receivables Noncurrent ProductionTaxCreditReceivablesNoncurrent	7665000	USD
CY2012Q4	sd	Production Tax Credit Receivables Noncurrent ProductionTaxCreditReceivablesNoncurrent	6313000	USD
CY2012	dei	Trading Symbol TradingSymbol	SD
CY2011	sd	Net Income Loss From Subsidiaries NetIncomeLossFromSubsidiaries	0	USD
CY2010	sd	Net Income Loss From Subsidiaries NetIncomeLossFromSubsidiaries	0	USD
CY2012	sd	Net Income Loss From Subsidiaries NetIncomeLossFromSubsidiaries	0	USD
CY2012	sd	Number Of Contracts NumberOfContracts	2	contracts
CY2012Q4	sd	Oil And Gas Property Cumulative Impairment Based On Ceiling Test Calculation OilAndGasPropertyCumulativeImpairmentBasedOnCeilingTestCalculation	3500000000	USD
CY2011Q4	sd	Oil And Gas Property Cumulative Impairment Based On Ceiling Test Calculation OilAndGasPropertyCumulativeImpairmentBasedOnCeilingTestCalculation	3500000000	USD
CY2011Q4	sd	Oil And Gas Receivable Current OilAndGasReceivableCurrent	134491000	USD
CY2012Q4	sd	Oil And Gas Receivable Current OilAndGasReceivableCurrent	215450000	USD
CY2012Q4	sd	Oil And Gas Services Receivable Current OilAndGasServicesReceivableCurrent	21186000	USD
CY2011Q4	sd	Oil And Gas Services Receivable Current OilAndGasServicesReceivableCurrent	18798000	USD
CY2012	sd	Operating Loss Carryforwards Beginning Expiration Year OperatingLossCarryforwardsBeginningExpirationYear	2023
CY2012	sd	Operating Loss Carryforwards Expiration Year OperatingLossCarryforwardsExpirationYear	2032
CY2010Q3	sd	Operating Loss Carryforwards Subject To Limitation OperatingLossCarryforwardsSubjectToLimitation	627800000	USD
CY2008Q4	sd	Operating Loss Carryforwards Subject To Limitation OperatingLossCarryforwardsSubjectToLimitation	298400000	USD
CY2012Q4	sd	Percentage Proved Reserves Estimate Company PercentageProvedReservesEstimateCompany	0.024
CY2012Q4	sd	Pipe Inventory Costs Cumulative PipeInventoryCostsCumulative	72400000	USD
CY2011	sd	Preferred Dividends Accrued Not Yet Paid PreferredDividendsAccruedNotYetPaid	16572000	USD
CY2012	sd	Preferred Dividends Accrued Not Yet Paid PreferredDividendsAccruedNotYetPaid	16572000	USD
CY2010	sd	Preferred Dividends Accrued Not Yet Paid PreferredDividendsAccruedNotYetPaid	17363000	USD
CY2011	sd	Preferred Dividends Paid PreferredDividendsPaid	39011000	USD
CY2012	sd	Preferred Dividends Paid PreferredDividendsPaid	38953000	USD
CY2010	sd	Preferred Dividends Paid PreferredDividendsPaid	20079000	USD
CY2010	sd	Proceeds From Issuance Of Convertible Preferred Stock Net ProceedsFromIssuanceOfConvertiblePreferredStockNet	290704000	USD
CY2011	sd	Proceeds From Issuance Of Convertible Preferred Stock Net ProceedsFromIssuanceOfConvertiblePreferredStockNet	-231000	USD
CY2012	sd	Proceeds From Issuance Of Convertible Preferred Stock Net ProceedsFromIssuanceOfConvertiblePreferredStockNet	0	USD
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2010	sd	Refunds Of Restricted Deposits RefundsOfRestrictedDeposits	5095000	USD
CY2012	sd	Refunds Of Restricted Deposits RefundsOfRestrictedDeposits	0	USD
CY2011	sd	Refunds Of Restricted Deposits RefundsOfRestrictedDeposits	0	USD
CY2012Q4	sd	Remaining Drilling Carry RemainingDrillingCarry	613500000	USD
CY2011	sd	Results Of Operations Depreciation And Depletion ResultsOfOperationsDepreciationAndDepletion	317246000	USD
CY2012	sd	Results Of Operations Depreciation And Depletion ResultsOfOperationsDepreciationAndDepletion	568029000	USD
CY2010	sd	Results Of Operations Depreciation And Depletion ResultsOfOperationsDepreciationAndDepletion	265914000	USD
CY2010	sd	Stockbased Compensation Captialized StockbasedCompensationCaptialized	5600000	USD
CY2012	sd	Stockbased Compensation Captialized StockbasedCompensationCaptialized	7500000	USD
CY2012Q4	sd	Tax Year Open To Examination TaxYearOpenToExamination	2009
CY2011Q4	sd	Total Other Assets TotalOtherAssets	126534000	USD
CY2010	sd	Reversal Of Deferred Tax Asset Valuation Allowance ReversalOfDeferredTaxAssetValuationAllowance	-447500000	USD
CY2012	sd	Reversal Of Deferred Tax Asset Valuation Allowance ReversalOfDeferredTaxAssetValuationAllowance	-100288000	USD
CY2011	sd	Reversal Of Deferred Tax Asset Valuation Allowance ReversalOfDeferredTaxAssetValuationAllowance	-5290000	USD
CY2012	sd	Sale Of Royalty Trust Units Value SaleOfRoyaltyTrustUnitsValue	139360000	USD
CY2011	sd	Seismic Exploration Cost SeismicExplorationCost	4900000	USD
CY2012	sd	Seismic Exploration Cost SeismicExplorationCost	15300000	USD
CY2010	sd	Seismic Exploration Cost SeismicExplorationCost	4100000	USD
CY2012Q4	sd	Shareholder Receivable Number Of Annual Installments ShareholderReceivableNumberOfAnnualInstallments	4
CY2010	sd	Stock Awards Assumed In Acquisition StockAwardsAssumedInAcquisition	2152000	USD
CY2011	sd	Stock Issued Under Legal Settlement StockIssuedUnderLegalSettlement	0	USD
CY2012	sd	Stock Issued Under Legal Settlement StockIssuedUnderLegalSettlement	0	USD
CY2010	sd	Stock Issued Under Legal Settlement StockIssuedUnderLegalSettlement	12200000	USD
CY2010	sd	Stock Issued Under Legal Settlement Value StockIssuedUnderLegalSettlementValue	12200000	USD
CY2011	sd	Stockbased Compensation Captialized StockbasedCompensationCaptialized	7600000	USD
CY2012Q4	sd	Total Other Assets TotalOtherAssets	144252000	USD
CY2012Q4	sd	Total Property And Equipment Net TotalPropertyAndEquipmentNet	8479977000	USD
CY2011Q4	sd	Total Property And Equipment Net TotalPropertyAndEquipmentNet	5389424000	USD
CY2012	sd	Treasury Stock Nonqualified Plan Value TreasuryStockNonqualifiedPlanValue	-298000	USD
CY2010	sd	Treasury Stock Nonqualified Plan Value TreasuryStockNonqualifiedPlanValue	4833000	USD
CY2011	sd	Treasury Stock Nonqualified Plan Value TreasuryStockNonqualifiedPlanValue	568000	USD
CY2012	sd	Unrecognized Excess Tax Benefits From Stock Based Compensation UnrecognizedExcessTaxBenefitsFromStockBasedCompensation	16700000	USD
CY2012	sd	Weighted Average Natural Gas Price WeightedAverageNaturalGasPrice	2.29
CY2011	sd	Weighted Average Natural Gas Price WeightedAverageNaturalGasPrice	4.06
CY2010	sd	Weighted Average Natural Gas Price WeightedAverageNaturalGasPrice	3.80
CY2010	sd	Weighted Average Oil Price WeightedAverageOilPrice	66.93
CY2011	sd	Weighted Average Oil Price WeightedAverageOilPrice	85.77
CY2012	sd	Weighted Average Oil Price WeightedAverageOilPrice	91.65
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001349436
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	493991081	shares
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2012Q2	dei	Entity Public Float EntityPublicFloat	3000000000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	SANDRIDGE ENERGY INC

Files In Submission

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$SD
SANDRIDGE ENERGY INC Stock $sd

2012 Q4 Form 10-K Financial Statement

#000134943613000114 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SD SANDRIDGE ENERGY INC Stock $sd

2012 Q4 Form 10-K Financial Statement

#000134943613000114 Filed on March 01, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$SD
SANDRIDGE ENERGY INC Stock $sd