Name:	sgy_DerivativeAssetFairValueNettingAdjustment
Namespace Prefix:	sgy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The percentage comparison for changes in oil and natural gas prices in the markets in which the company sells it products versus changes in the underlying price basis indicated in the derivative contract, for purposes of determining effectiveness of such derivative contracts.

No definition available.

Name:	sgy_GeneralFairValueHedgeInformationMaximumRSquarePercentage
Namespace Prefix:	sgy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Number Of Counterparties

No definition available.

Name:	sgy_NumberOfCounterparties
Namespace Prefix:	sgy_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Percentage Of Counterparty Contract Volume

No definition available.

Name:	sgy_PercentageOfCounterpartyContractVolume
Namespace Prefix:	sgy_
Data Type:	num:percentItemType
Balance Type:	na
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_DerivativeInstrumentsGainLossLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The number of derivative instruments of a particular group held by the entity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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Period Type:	instant

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_CounterpartyNameAxis=sgy_OneCounterpartyMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_CounterpartyNameAxis=sgy_TwoCounterpartiesMember
Namespace Prefix:
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