Employee Benefit Plans (Components of Postretirement Benefit Liabilities) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Beginning of year	$ 28,770	$ 30,206
Service cost for benefits earned during the period	1,188	1,326	$ 1,401
Interest cost on accumulated post retirement benefit	1,469	1,148	908
Net benefit payments and expense	(1,240)	(1,207)
Actuarial loss	1,861	2,703
Accumulated postretirement benefit obligation	28,326	28,770	$ 30,206
Liabilities:
Current liabilities	1,741	1,625
Non-currrent liabilities	26,585	27,145
Total post retirement benefit liability recognized in statement of financial position	28,326	28,770
Components included in accumulated other comprehensive income (loss):
Unrecognized net loss	1,385	465
Cumulative net periodic benefit cost (in excess of employer contribution)	$ 29,711	$ 28,305