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v2.4.0.6

Nature of Operations (Details) | 12 Months Ended
--- | ---
Dec. 31, 2012 Segment Campus
Nature of Operations (Textual) |
Number of campuses | 100
Number of reporting segments | 1

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- Details
Name: | stra_NatureOfOperationsTextualAbstract
Namespace Prefix: | stra_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of campuses. + References No definition available. + Details
Name: | stra_NumberOfCampuses
Namespace Prefix: | stra_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration