Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 297	$ 332	$ 891	$ 995
Other components of net periodic benefit costs:
Interest cost on accumulated postretirement benefit	367	287	1,102	861
Other components	2	17	8	51
Total other components of net periodic benefit costs	365	304	1,094	912
Net periodic postretirement benefit cost	$ 662	$ 636	$ 1,985	$ 1,907