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Executive Stock Plans And Stock-Based Compensation (Stock-Based Compensation Expense And Related Income Tax Benefit Recognized) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Share-based Payment Arrangement, Additional Disclosure [Abstract] |  |  |
Total stock-based compensation expense | $ 12,063 | $ 8,419 | $ 6,186
Income tax benefit recorded on stock-based compensation expense | $ 2,713 | $ 1,899 | $ 1,389

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