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Pension And Other Postretirement Benefit Plans (Additional Information On Funded Status) (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Mar. 31, 2022
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Pension Benefits [Member] |  |
For Plans With A Projected Benefit Obligation In Excess Of Plan Assets: |  |
Aggregate projected benefit obligation (PBO) | $ 29,430 | $ 39,988
Aggregate fair value of plan assets | 0 | 6,284
For Plans With An Accumulated Benefit Obligation In Excess Of Plan Assets: |  |
Aggregate accumulated benefit obligation (ABO) | 28,487 | 38,722
Aggregate fair value of plan assets | 0 | 6,284
Other Postretirement Benefits [Member] |  |
For Plans With A Projected Benefit Obligation In Excess Of Plan Assets: |  |
Aggregate projected benefit obligation (PBO) | 20,716 | 24,957
Aggregate fair value of plan assets | $ 2,257 | $ 2,706

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