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Share-Based Compensation Plans - Share-Based Compensation Expense (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Expense
Share-based compensation expense	$ 9,484	$ 8,715
Tax effect of share-based compensation	(2,371)	(2,179)
Share-based compensation expense, net of tax	7,113	6,536
Technical and Academic Services
Share-based Compensation Expense
Share-based compensation expense	1,812	1,627
Counseling Support and Services
Share-based Compensation Expense
Share-based compensation expense	4,720	4,350
Marketing and Communication
Share-based Compensation Expense
Share-based compensation expense	114	75
General and Administrative
Share-based Compensation Expense
Share-based compensation expense	$ 2,838	$ 2,663

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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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

+ References

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
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