Employee Benefit Plans (Components of net periodic benefit costs post retirement benefits) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Postemployment Benefits [Abstract]
Service cost for benefits earned during the period	$ 331	$ 351	$ 663	$ 701
Other components of net periodic benefit costs:
Interest cost on accumulated postretirement benefit	287	227	574	454
Other components	17	53	34	106
Total other components of net periodic benefit costs	304	280	608	560
Net periodic postretirement benefit cost	$ 635	$ 631	$ 1,271	$ 1,261