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Other Employee Benefit Plans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Company's contributions to 401(K) plan | $ 7.7 | $ 7.4 | $ 7.6
Common stock shares purchase price limit for employees as percentage of market value under Employee Stock Purchase Plan | 90.00% |  |
Employee stock purchase plan maximum percentage of purchase employee can make on eligible compensation | 10.00% |  |
Maximum number of shares available for purchase by participating employees (in shares) | 2,500,000 |  |
Australia / New Zealand |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Long service leave expense | $ 8.7 | $ 8.4 | $ 1.5
Strategic Education, Inc. 401(k) Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Percentage of company matching contribution to 401(K) plan, first tier | 100.00% |  |
Defined contribution plan employer matching contribution percent, first tier | 2.00% |  |
Percentage of company matching contribution to 401(K) plan, second tier | 50.00% |  |
Defined contribution plan employer matching contribution percent, second tier | 2.00% |  |
Defined contribution plan maximum employer matching contribution percent | 3.00% |  |

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- Definition First tier of percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of first tier of the employee's percentage contribution. + References No definition available. + Details
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- Definition Percentage employer matches of second tier of the employee's percentage contribution. + References No definition available. + Details
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- Definition Second tier of percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Employee stock purchase plan, maximum percentage of purchase an employee can make on eligible compensation. + References No definition available. + Details
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- Definition Employee stock purchase plan, percentage of purchase price from market value. + References No definition available. + Details
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- Definition Amount of expense for salary, wage, profit sharing; incentive and equity-based compensation; and other employee benefit. Other employee benefit expense includes, but is not limited to, service component of net periodic benefit cost for defined benefit plan. Excludes compensation cost in cost of good and service sold. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(4)) -URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227 + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition This item represents the number of shares provided to the Employee Stock Ownership Plan (ESOP) during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=109244661&loc=d3e17540-113929 + Details
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- Details
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