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Nature of Operations (Details)	9 Months Ended
	Sep. 30, 2013 Segments
Nature of Operations (Textual)
Number of reporting segments	1

X

- Details

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Namespace Prefix:	stra_
Data Type:	xbrli:stringItemType
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Period Type:	duration

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- 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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration