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Significant Accounting Policies (Details Textual) | 6 Months Ended
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Jun. 30, 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