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Acquisitions and Divestitures - Drilling and Completion Costs Associated with Sale of Working Interests (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013
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Drilling Carry Transaction Activities [Line Items] |
Total Drilling Carry | $ 1,000.0
Drilling Carry Recorded | 509.7
Drilling Carry Remaining | 490.3
Atinum MidCon I, LLC |
Drilling Carry Transaction Activities [Line Items] |
Total Drilling Carry | 250.0
Drilling Carry Recorded | 197.2
Drilling Carry Remaining | 52.8
Repsol E&P USA, Inc. |
Drilling Carry Transaction Activities [Line Items] |
Total Drilling Carry | 750.0
Drilling Carry Recorded | 312.5
Drilling Carry Remaining | $ 437.5

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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

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