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Variable Interest Entities - Royalty Trusts - Distributions (Details) (USD $) | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Variable Interest Entity [Line Items] |  |  |
Distributions to third-party unitholders | $ 181,727,000 | $ 60,200,000 | $ 3,515,000
Royalty Trusts |  |  |
Variable Interest Entity [Line Items] |  |  |
Total distributions | 275,000,000 | 91,200,000 |
Distributions to third-party unitholders | $ 181,700,000 | $ 57,400,000 |

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- Definition Cash outflow from payment of distributions to noncontrolling interest holders. + References No definition available. + Details
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Period Type: | duration

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- Definition Royalty Trust Distributions to Unitholders + References No definition available. + Details
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Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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Period Type: | duration