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v3.20.2

Restructuring and Related Charges - Additional Information (Details) | 1 Months Ended
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Oct. 31, 2013 Location
Restructuring and Related Activities [Abstract] |
Campus locations closed | 20
Marginal borrowing rate used to discount leases | 4.50%

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- Definition Campus location closed. + References No definition available. + Details
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Namespace Prefix: | stra_
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Balance Type: | na
Period Type: | duration

X
- Definition Marginal borrowing rate of lease. + References No definition available. + Details
Name: | stra_MarginalBorrowingRateOfLease
Namespace Prefix: | stra_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_RestructuringAndRelatedActivitiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration