Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 169	$ 246	$ 338	$ 491
Other components of net periodic benefit costs:
Interest cost on accumulated postretirement benefit	370	375	741	750
Other components	25	3	50	6
Total other components of net periodic benefit costs	345	372	691	744
Net periodic postretirement benefit cost	$ 514	$ 618	$ 1,029	$ 1,235

Subtotal of other components of net periodic benefit (recovery) costs.

No definition available.

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- Definition

Amount of cost recognized for passage of time related to defined benefit plan.

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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of defined benefit plan cost (credit), classified as other.

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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