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Pension And Other Postretirement Benefit Plans (Benefit Obligations, Plan Assets, And Funded Status) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Plan assets at fair value, beginning of year | $ 221,953 |  |
Plan assets at fair value, end of year | 220,336 | $ 221,953 |
Pension Benefits [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Accumulated benefit obligation | 231,685 | 235,540 |
Projected benefit obligation | 237,626 | 241,399 | $ 277,050
Projected benefit obligation, beginning of year | 241,399 | 277,050 |
Service cost | 5,214 | 6,172 | 6,674
Interest cost | 11,566 | 9,670 | 8,754
Effect of discount rate change | (5,147) | (31,621) |
Foreign currency exchange rate changes | (298) | (543) |
Other | 2,197 | (2,120) |
Benefit payments | (17,305) | (17,209) |
Projected benefit obligation, end of year | 237,626 | 241,399 | 277,050
Plan assets at fair value, beginning of year | 221,953 | 256,013 |
Actual return on plan assets | 11,666 | (20,613) |
Employer contributions | 4,257 | 4,038 |
Foreign currency exchange rate changes | (235) | (276) |
Plan assets at fair value, end of year | 220,336 | 221,953 | 256,013
Funded status of the plans, end of year | (17,290) | (19,446) |
Other Postretirement Benefits [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Projected benefit obligation | 20,077 | 20,716 | 24,957
Projected benefit obligation, beginning of year | 20,716 | 24,957 |
Service cost | 239 | 115 | 170
Interest cost | 1,049 | 944 | 950
Effect of discount rate change | (255) | (1,906) |
Foreign currency exchange rate changes | 30 | (145) |
Other | 589 | (659) |
Benefit payments | (2,291) | (2,590) |
Projected benefit obligation, end of year | 20,077 | 20,716 | 24,957
Plan assets at fair value, beginning of year | 2,257 | 2,706 |
Actual return on plan assets | 174 | 73 |
Employer contributions | 1,794 | 2,068 |
Foreign currency exchange rate changes | 0 | 0 |
Plan assets at fair value, end of year | 1,934 | 2,257 | $ 2,706
Funded status of the plans, end of year | $ (18,143) | $ (18,459) |

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