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Stock-based Compensation - Share-based compensation expense and related income tax benefits (Details) - USD ($) $ in Thousands | 9 Months Ended
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Nov. 30, 2020 | Nov. 30, 2019
Share based compensation expense and related income tax benefits |  |
Compensation expense | $ 5,773 | $ 4,904
Income tax benefits | $ 525 | $ 1,030

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