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Other Employee Benefit Plans (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Company's contributions to 401(K) plan |  | $ 7,600,000 | $ 7,200,000 | $ 3,500,000
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 |  |  |  |
Long service leave expense |  | $ 1,500,000 |  |
Strategic Education, Inc. 401(k) Plan |  |  |  |
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% |  |
Strategic Education, Inc. 401(k) Plan | Subsequent Event |  |  |  |
Maximum annual contribution to 401(k) plan by employees, effective January 1, 2021 | $ 19,500 |  |  |

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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, 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 http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + 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 Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
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