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Property, Plant and Equipment - Capitalized Costs of Unproved Properties Excluded from Amortization (Parenthetical) (Details) (USD $) In Millions, unless otherwise specified |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2012 Year Cost Incurred 2012 | Dec. 31, 2011 Year Cost Incurred 2011 | Dec. 31, 2010 Year Cost Incurred 2010 | Dec. 31, 2009 Year Cost Incurred 2009 and Prior
Capitalized Costs of Unproved Properties Excluded from Amortization [Line Items] |  |  |  |  |
Pipe inventory costs, cumulative | $ 72.4 |  |  |  | $ 10.1
Pipe inventory costs, period costs |  | $ 54.9 | $ 2.3 | $ 5.1 |

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- Definition Pipe inventory costs, cumulative + References No definition available. + Details
Name: | sd_PipeInventoryCostsCumulative
Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Pipe inventory costs, period costs + References No definition available. + Details
Name: | sd_PipeInventoryCostsPeriodCosts
Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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