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Property, Plant and Equipment - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Cumulative full cost ceiling limitation impairment charges	$ 3,700,000,000sd_OilAndGasPropertyCumulativeImpairmentBasedOnCeilingTestCalculation	$ 3,500,000,000sd_OilAndGasPropertyCumulativeImpairmentBasedOnCeilingTestCalculation
Full cost ceiling impairments	164,800,000us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense	0us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense	0us-gaap_UnamortizedCostsCapitalizedLessRelatedDeferredIncomeTaxesExceedCeilingLimitationExpense
Average depreciation and depletion rate (per Boe)	15.00sd_AverageDepreciationAndDepletionRate	16.81sd_AverageDepreciationAndDepletionRate	16.93sd_AverageDepreciationAndDepletionRate
Proved oil and natural gas properties, cost incurred in excess of development agreement	180,000,000sd_ProvedOilandNaturalGasPropertiesCostIncurredinExcessofDevelopmentAgreement	180,000,000sd_ProvedOilandNaturalGasPropertiesCostIncurredinExcessofDevelopmentAgreement
Expected completion of evaluation activities on majority of unproved properties	10 years
Repsol
Property, Plant and Equipment [Line Items]
Drilling carry received or billed	205,600,000sd_DrillingCarryReceivedOrBilled / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = sd_RepsolEAndPUsaIncMember
Atinum and Repsol
Property, Plant and Equipment [Line Items]
Drilling carry received or billed		408,000,000sd_DrillingCarryReceivedOrBilled / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = sd_AtinumMidconILlcAndRepsolEAndPUsaIncMember	367,600,000sd_DrillingCarryReceivedOrBilled / us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis = sd_AtinumMidconILlcAndRepsolEAndPUsaIncMember
Repsol
Property, Plant and Equipment [Line Items]
Minimum net wells	484sd_MinimumNetWells / us-gaap_LeaseArrangementTypeAxis = sd_RepsolEAndPUsaIncMember
Net wells	340sd_NetWells / us-gaap_LeaseArrangementTypeAxis = sd_RepsolEAndPUsaIncMember
Potential Drilling Carry Costs | Repsol | Maximum
Property, Plant and Equipment [Line Items]
Future drilling and completion costs	$ 75,000,000.0sd_TotalDrillingCarry / us-gaap_LeaseArrangementTypeAxis = sd_RepsolEAndPUsaIncMember / us-gaap_LossContingenciesByNatureOfContingencyAxis = sd_PotentialDrillingCarryCostsMember / us-gaap_RangeAxis = us-gaap_MaximumMember

X

- Definition

Average depreciation and depletion rate on oil and gas properties.

+ References

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- Definition

Expected years to complete majority of evaluation activities on unproved properties.

+ References

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- Definition

Drilling Carry Received or Billed.

+ References

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- Definition

Minimum number of net wells required to be drilled in the area of mutual interest under terms of agreement.

+ References

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- Definition

Number of net wells drilled in the area of mutual interest as of a specified date.

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- Definition

Oil and Gas Property, Cumulative Impairment based on Ceiling Test Calculation.

+ References

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- Definition

Proved Oil and Natural Gas Properties, Cost Incurred in Excess of Development Agreement

+ References

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- Definition

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- Definition

The excess of unamortized costs capitalized within a cost center, less related deferred income taxes, over the cost center ceiling limitation, which is charged to expense for oil and gas producing companies that use full cost method of accounting for investments in oil and gas producing properties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 932

-SubTopic 360

-Section S99

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=27015634&loc=d3e516453-122869



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 10

-Paragraph c

-Subparagraph 4(ii)

-Article 4

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