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Significant Accounting Policies (Details Textual)	9 Months Ended
	Sep. 30, 2013
Significant Accounting Policies (Textual)
Percentage of tuition revenue in total revenue	96.00%

X

- 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

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