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Acquisitions and Divestitures - Drilling and Completion Costs Associated with Sale of Working Interests (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012
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Drilling Carry Transaction Activities [Line Items] |  |
Cumulative proceeds from sale of working interest subject to drilling carry | $ 559.5 | [1]
Drilling Carry Recorded | 386.5 |
Drilling Carry Remaining | 613.5 |
Atinum MidCon I, LLC |  |
Drilling Carry Transaction Activities [Line Items] |  |
Cumulative proceeds from sale of working interest subject to drilling carry | 287.0 | [1]
Drilling Carry Recorded | 157.2 |
Drilling Carry Remaining | 92.8 |
Repsol E&P USA, Inc. |  |
Drilling Carry Transaction Activities [Line Items] |  |
Cumulative proceeds from sale of working interest subject to drilling carry | 272.5 | [1]
Drilling Carry Recorded | 229.3 |
Drilling Carry Remaining | 520.7 |
Mississippian Properties |  |
Drilling Carry Transaction Activities [Line Items] |  |
Cumulative proceeds from sale of working interest subject to drilling carry | $ 500.0 |
[1] | Includes amounts related to the drilling carry.

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- Definition Cumulative proceeds from sale of working interest subject to drilling carry + References No definition available. + Details
Name: | sd_CumulativeProceedsFromSaleOfWorkingInterestSubjectToDrillingCarry
Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Drilling Carry Received or Billed, Cumulative + References No definition available. + Details
Name: | sd_DrillingCarryReceivedOrBilledCumulative
Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | sd_DrillingCarryTransactionActivitiesLineItems
Namespace Prefix: | sd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Remaining Drilling Carry + References No definition available. + Details
Name: | sd_RemainingDrillingCarry
Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant