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Significant Accounting Policies (Narrative) (Details)	3 Months Ended
	Mar. 31, 2012
Significant Accounting Policies [Abstract]
Percentage of tuition revenue to total revenue	97.00%

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- Definition

Percentage of tuition revenue to 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:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration