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Regulation (Details) | Mar. 31, 2021 educational_institution | Jan. 31, 2021 USD ($) | Apr. 09, 2020 USD ($)
--- | --- | --- | ---
Capella University |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |
Consolidation Appropriations Act of 2021, eligible grant |  | $ 328,602 |
Strayer University |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |
Consolidation Appropriations Act of 2021, eligible grant |  | $ 5,831,606 |
Education stabilization grant |  |  | $ 5,792,122
Tuition grant |  |  | $ 500
AUSTRALIA |  |  |
Unusual or Infrequent Item, or Both [Line Items] |  |  |
Number of operating post-secondary educational institutions | educational_institution | 2 |  |

X
- Definition Cares Act, Education Grant + References No definition available. + Details
Name: | stra_CaresActEducationGrant
Namespace Prefix: | stra_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Consolidation Appropriations Act of 2021, Direct Grant + References No definition available. + Details
Name: | stra_ConsolidationAppropriationsActOf2021DirectGrant
Namespace Prefix: | stra_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of Operating Post-Secondary Educational Institutions + References No definition available. + Details
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Namespace Prefix: | stra_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tuition Grant + References No definition available. + Details
Name: | stra_TuitionGrant
Namespace Prefix: | stra_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=stra_StrayerUniversityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_AU
Namespace Prefix: |
Data Type: | na
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Period Type: |