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Share-Based Compensation Plans - Share-Based Compensation Expense (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Share-based compensation expense | $ 8,047 | $ 7,740
Tax effect of share-based compensation | (2,012) | (1,935)
Share-based compensation expense, net of tax | 6,035 | 5,805
Technology and Academic Services |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Share-based compensation expense | 1,539 | 1,289
Counseling Services and Support |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Share-based compensation expense | 4,073 | 3,977
Marketing and Communication [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Share-based compensation expense | 75 | 64
University related expenses |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |
Share-based compensation expense | $ 2,360 | $ 2,410

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