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Litigation - Narratives (Details) | Oct. 05, 2020 plaintiff | Apr. 20, 2021 borrowerDefenseApplication
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Commitments and Contingencies Disclosure [Abstract] |  |
Number of borrower defense applications submitted (more than) |  | 1,000
Number of borrower defense applications submitted received for repayment (approximately) |  | 500
Number of plaintiffs | plaintiff | 6 |

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- Definition Number Of Borrower Defense Applications Received For Repayment + References No definition available. + Details
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- Definition Number of Borrower Defense Applications Submitted + References No definition available. + Details
Name: | stra_NumberOfBorrowerDefenseApplicationsSubmitted
Namespace Prefix: | stra_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- References No definition available. + Details
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- Definition Number of plaintiffs that have filed claims pertaining to a loss contingency. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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