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Earnings Per Share - Additional Information (Details) | 1 Months Ended
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Jan. 31, 2009 8.5% Convertible perpetual preferred stock | Dec. 31, 2009 6.0% Convertible perpetual preferred stock | Nov. 30, 2010 7.0% Convertible perpetual preferred stock
Earnings Per Share Disclosure [Line Items] |  |  |
Preferred stock, dividend rate, percentage | 8.50% | 6.00% | 7.00%

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

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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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