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Benefit Plans (Accumulated benefit obligation exceeding the fair value of plan assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021	Sep. 30, 2008
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Accumulated Benefit Obligation				$ 46,001
Other Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 107,089	$ 142,172	$ 145,452
Defined Benefit Plan, Accumulated Benefit Obligation	93,640	129,772
defined benefit plans, aggregate projected benefit obligation	$ 93,640	$ 129,772

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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