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Share-Based Compensation Plans - Share-Based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-Based Compensation
Share-based compensation expense included in operating expenses	$ 14,225	$ 13,204	$ 12,642
Tax effect of share-based compensation	(3,556)	(3,301)	(3,161)
Share-based compensation expense, net of tax	10,669	9,903	9,481
Technology and academic services
Share-Based Compensation
Share-based compensation expense included in operating expenses	2,594	2,365	2,424
Counseling services and support
Share-Based Compensation
Share-based compensation expense included in operating expenses	7,200	6,862	6,287
Marketing and communication
Share-Based Compensation
Share-based compensation expense included in operating expenses	226	190	154
General and administrative
Share-Based Compensation
Share-based compensation expense included in operating expenses	$ 4,205	$ 3,787	$ 3,777

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1

Reference 2: 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, after tax, of expense for award under share-based payment arrangement.

+ References

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+ 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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