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Equity Awards - Schedule of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Schedule of stock-based compensation expense
Stock-based compensation expense included in operating expense	$ 4,077	$ 5,612	$ 15,202	$ 16,209
Tax benefit	1,054	1,460	3,988	4,250
Stock-based compensation expense, net of tax	3,023	4,152	11,214	11,959
Instructional and support costs
Schedule of stock-based compensation expense
Stock-based compensation expense included in operating expense	597	1,802	4,128	5,190
General and administration
Schedule of stock-based compensation expense
Stock-based compensation expense included in operating expense	3,210	3,810	10,708	11,019
Restructuring costs
Schedule of stock-based compensation expense
Stock-based compensation expense included in operating expense	$ 270	$ 0	$ 366	$ 0

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- Definition

Amount, after tax, of expense for award under share-based payment arrangement.

+ References

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- Definition

Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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- Definition

Amount of noncash expense for share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

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