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Variable Interest Entities - Royalty Trusts - Assets and Liabilities Included in Consolidated Balance Sheets (Parenthetical) (Details) (Royalty Trusts, USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Royalty Trusts |  |
Variable Interest Entity [Line Items] |  |
Reserves for future expenses | $ 3.0 | $ 2.0

X
- Definition Reserves held by the trustee for future general and administrative expenses. + References No definition available. + Details
Name: | sd_ReservesForExpenses
Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration