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

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Namespace Prefix:	sd_
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Balance Type:	na
Period Type:	duration

X

- 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
Period Type:	instant

X

- 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_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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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

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