Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 246	$ 297	$ 491	$ 594
Other components of net periodic benefit costs:
Interest cost on accumulated postretirement benefit	375	368	750	735
Other components	3	4	6	6
Total other components of net periodic benefit costs	372	364	744	729
Net periodic postretirement benefit cost	$ 618	$ 661	$ 1,235	$ 1,323