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Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Postemployment Benefits [Abstract] |  |  |  |
Service cost for benefits earned during the period | $ 245 | $ 297 | $ 736 | $ 891
Other components of net periodic benefit costs: |  |  |  |
Interest cost on accumulated postretirement benefit | 374 | 367 | 1,124 | 1,102
Other components | 2 | 2 | 8 | 8
Total other components of net periodic benefit costs | 372 | 365 | 1,116 | 1,094
Net periodic postretirement benefit cost | $ 617 | $ 662 | $ 1,852 | $ 1,985

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