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Acquisitions and Divestitures - Arena Acquisition - Unaudited Pro Forma Results of Operations (Parenthetical) (Details) (Arena Acquisition, USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2010
Arena Acquisition |
Business Acquisition [Line Items] |
Reversal of deferred tax asset valuation allowance, pro forma adjustment | $ 454.5

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- Definition Reversal of deferred tax asset valuation allowance, pro forma adjustment + References No definition available. + Details
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Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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