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Construction Contract - Narrative (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Construction Contracts [Line Items] |  |  |
Construction contract revenue | $ 0 us-gaap_ConstructionRevenue | $ 23,349,000 us-gaap_ConstructionRevenue | $ 0 us-gaap_ConstructionRevenue
Construction contract costs | 0 us-gaap_ContractRevenueCost | 23,349,000 us-gaap_ContractRevenueCost | 0 us-gaap_ContractRevenueCost
Transmission Expansion Projects |  |  |
Construction Contracts [Line Items] |  |  |
Construction contract price |  | 23,300,000 sd_ContractPricePerAgreement / us-gaap_TypeOfArrangementAxis = sd_TransmissionExpansionProjectsMember |
Construction contract revenue |  | 23,300,000 us-gaap_ConstructionRevenue / us-gaap_TypeOfArrangementAxis = sd_TransmissionExpansionProjectsMember |
Construction contract costs |  | $ 23,300,000 us-gaap_ContractRevenueCost / us-gaap_TypeOfArrangementAxis = sd_TransmissionExpansionProjectsMember |

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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 Contract price per construction agreement, including agreed upon revisions. + References No definition available. + Details
Name: | sd_ContractPricePerAgreement
Namespace Prefix: | sd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The aggregate revenue from building and real estate development, which may include improvements (such as drainage, utilities, grading and subdividing) to a parcel of land, and general contracting services during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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Namespace Prefix: | us-gaap_
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- Definition Costs incurred and are directly related to generating contract revenues. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(e)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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Period Type: | duration

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Period Type: |