Name:	sgy_AverageTwelveMonthGasPricesNetOfDifferentials
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Period Type:	instant

The calculated weighted average natural gas price per mcf utilized for purposes of estimating the company's proved reserves and future net revenue.

No definition available.

Name:	sgy_AverageTwelveMonthNGLPricesNetOfDifferentials
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Data Type:	us-types:perUnitItemType
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The calculated weighted average oil price per barrel utilized for purposes of estimating the company's proved reserves and future net revenue.

No definition available.

Name:	sgy_AverageTwelveMonthOilPricesNetOfDifferentials
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Data Type:	us-types:perUnitItemType
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Period Type:	instant

The amount the impairment of oil and gas properties was decreased as a result of hedges in place for oil and gas producing companies subject to full cost accounting.

No definition available.

Name:	sgy_DecreaseInImpairmentOfOilAndGasProperties
Namespace Prefix:	sgy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 360
-Section 35
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=28370743&loc=d3e66150-109466

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

Name:	us-gaap_ImpairmentOfOilAndGasProperties
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_OilAndGasInProcessActivitiesLineItems
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Data Type:	xbrli:stringItemType
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Period Type:	duration

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=sgy_OilAndGasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReserveQuantitiesByTypeOfReserveAxis=us-gaap_OilReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReserveQuantitiesByTypeOfReserveAxis=us-gaap_NaturalGasReservesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_ReserveQuantitiesByTypeOfReserveAxis=sgy_NaturalGasLiquidsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: