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Revenue Recognition - Narrative (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2022 USD ($) course term | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Graduation Fund [Line Items] |  |  |
Number of free courses | course | 1 |  |
Number of successfully completed courses | course | 3 |  |
Consecutive terms of non attendance in which Graduation Fund credits will be lost | term | 1 |  |
Expected collection period of tuition receivable | 12 months |  |
Graduation fund estimated to be redeemed | $ 17,900 |  |
Graduation Fund liability | 46,842 | $ 52,024 | $ 53,314
Undergraduate Degree Programs |  |  |
Graduation Fund [Line Items] |  |  |
Graduation Fund liability | $ 41,700 | $ 48,600 |
Minimum |  |  |
Graduation Fund [Line Items] |  |  |
Expected collection period of tuition receivable, noncurrent | 2 years |  |
Deferred acquisition costs, amortization period | 1 year |  |
Maximum |  |  |
Graduation Fund [Line Items] |  |  |
Expected collection period of tuition receivable, noncurrent | 4 years |  |
Deferred acquisition costs, amortization period | 2 years |  |

X
- Definition Represents the number of consecutive term of non-attendance in which Graduation Fund credits will be lost. + References No definition available. + Details
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X
- Definition Deferred Acquisition Costs, Amortization Period + References No definition available. + Details
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Namespace Prefix: | stra_
Data Type: | xbrli:durationItemType
Balance Type: | na
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X
- Definition The estimated amount of graduation fund to be redeemed in the next twelve months. + References No definition available. + Details
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Namespace Prefix: | stra_
Data Type: | xbrli:monetaryItemType
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X
- Definition Expected collection period of tuition receivable. + References No definition available. + Details
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X
- Definition Expected collection period of tuition receivable noncurrent. + References No definition available. + Details
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X
- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to graduation fund liability. + References No definition available. + Details
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Namespace Prefix: | stra_
Data Type: | xbrli:monetaryItemType
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X
- Definition Represents the number of free courses. + References No definition available. + Details
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X
- Definition Represents the number of successfully completed courses. + References No definition available. + Details
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Namespace Prefix: | stra_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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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- Details
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Period Type: |

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- Details
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- Details
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