XML 55 R44.htm IDEA: XBRL DOCUMENT
v3.23.1

Significant Accounting Policies - Assets Held for Sale (Details) | Mar. 31, 2023 uSHigherEducationCampus
--- | ---
Accounting Policies [Abstract] |
Number of facilities held for sale | 1

X
- Definition Number Of Facilities Held For Sale + References No definition available. + Details
Name: | stra_NumberOfFacilitiesHeldForSale
Namespace Prefix: | stra_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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