Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 297	$ 331	$ 594	$ 663
Other components of net periodic benefit costs:
Interest cost on accumulated postretirement benefit	368	287	735	574
Other components	(4)	17	(6)	34
Total other components of net periodic benefit costs	364	304	729	608
Net periodic postretirement benefit cost	$ 661	$ 635	$ 1,323	$ 1,271