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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, 2021 | Sep. 30, 2020
Share-based Compensation Expense |  |
Share-based compensation expense | $ 8,715 | $ 8,047
Tax effect of share-based compensation | (2,179) | (2,012)
Share-based compensation expense, net of tax | 6,536 | 6,035
Technology and Academic Services |  |
Share-based Compensation Expense |  |
Share-based compensation expense | 1,627 | 1,539
Counseling Services and Support |  |
Share-based Compensation Expense |  |
Share-based compensation expense | 4,350 | 4,073
Marketing and Communication |  |
Share-based Compensation Expense |  |
Share-based compensation expense | 75 | 75
University related expenses |  |
Share-based Compensation Expense |  |
Share-based compensation expense | $ 2,663 | $ 2,360

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