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Significant Accounting Policies (Details Textual)	3 Months Ended
	Mar. 31, 2013
Significant Accounting Policies (Textual)
Percentage of tuition revenue in total revenue	96.00%

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- Definition

Percentage of tuition revenue in total revenue.

+ References

No definition available.

+ Details

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Namespace Prefix:	stra_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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- Details

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